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Sample records for accident alarm system

  1. Optimal Alarm Systems

    Data.gov (United States)

    National Aeronautics and Space Administration — An optimal alarm system is simply an optimal level-crossing predictor that can be designed to elicit the fewest false alarms for a fixed detection probability. It...

  2. Persons with Mild or Moderate Alzheimer's Disease Learn to Use Urine Alarms and Prompts to Avoid Large Urinary Accidents

    Science.gov (United States)

    Lancioni, Giulio E.; Singh, Nirbhay N.; O'Reilly, Mark F.; Sigafoos, Jeff; Bosco, Andrea; Zonno, Nadia; Badagliacca, Francesco

    2011-01-01

    This study assessed whether three patients with Alzheimer's disease could learn to use urine alarms and caregivers' prompts to eliminate large urinary accidents. As soon as the patient began to release urine, the alarm system presented auditory and vibratory signals. In relation to those signals, the caregiver would prompt/encourage the patient to…

  3. Analysis of criticality accident alarm system coverage of the X-744G, X-744H, X-342/344A and X-343 facilities at the Portsmouth Gaseous Diffusion Plant

    Energy Technology Data Exchange (ETDEWEB)

    Dobelbower, M.C.; Woollard, J.; Lee, B.L. Jr.; Tayloe, R.W. Jr.

    1995-09-01

    Additional services for the uranium enrichment cascade process, such as UF{sub 6} feed, sampling, and material storage are provided by several ancillary Uranium Material Handling (UMH) facilities at the PORTS site. These facilities include the X-343 Feed Vaporization and Sampling Facility, the X-744G Bulk Non-Uranium Enrichment Service Activity (UESA) Storage Building, the X-744H Waste Separation and Storage Facility, the X-344A Toll Enrichment Services Facility and the X-342A Feed Vaporization and Fluorine Generation Facility. As uranium operations are performed within these facilities, the potential for a criticality accident exists. In the event of a criticality accident within a process facility at PORTS, a Criticality Accident Alarm System (CAAS) is in place to detect the criticality accident and sound an alarm. In this report, an analysis was performed to provide verification that the existing CAAS at PORTS provides complete criticality accident coverage in the X-343, X-744G. X-744H. X-344A and X-342A facilities. The analysis has determined that all of the above-mentioned facilities have complete CAAS coverage.

  4. Evaluation of the concrete shield compositions from the 2010 criticality accident alarm system benchmark experiments at the CEA Valduc SILENE facility

    Energy Technology Data Exchange (ETDEWEB)

    Miller, Thomas Martin [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Celik, Cihangir [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Dunn, Michael E [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Wagner, John C [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); McMahan, Kimberly L [Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Authier, Nicolas [French Atomic Energy Commission (CEA), Centre de Valduc, Is-sur-Tille (France); Jacquet, Xavier [French Atomic Energy Commission (CEA), Centre de Valduc, Is-sur-Tille (France); Rousseau, Guillaume [French Atomic Energy Commission (CEA), Centre de Valduc, Is-sur-Tille (France); Wolff, Herve [French Atomic Energy Commission (CEA), Centre de Valduc, Is-sur-Tille (France); Savanier, Laurence [French Atomic Energy Commission (CEA), Centre de Valduc, Is-sur-Tille (France); Baclet, Nathalie [French Atomic Energy Commission (CEA), Centre de Valduc, Is-sur-Tille (France); Lee, Yi-kang [French Atomic Energy Commission (CEA), Centre de Saclay, Gif sur Yvette (France); Trama, Jean-Christophe [French Atomic Energy Commission (CEA), Centre de Saclay, Gif sur Yvette (France); Masse, Veronique [French Atomic Energy Commission (CEA), Centre de Saclay, Gif sur Yvette (France); Gagnier, Emmanuel [French Atomic Energy Commission (CEA), Centre de Saclay, Gif sur Yvette (France); Naury, Sylvie [French Atomic Energy Commission (CEA), Centre de Saclay, Gif sur Yvette (France); Blanc-Tranchant, Patrick [French Atomic Energy Commission (CEA), Centre de Saclay, Gif sur Yvette (France); Hunter, Richard [Babcock International Group (United Kingdom); Kim, Soon [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Dulik, George Michael [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Reynolds, Kevin H. [Y-12 National Security Complex, Oak Ridge, TN (United States)

    2015-01-01

    In October 2010, a series of benchmark experiments were conducted at the French Commissariat a l'Energie Atomique et aux Energies Alternatives (CEA) Valduc SILENE facility. These experiments were a joint effort between the United States Department of Energy Nuclear Criticality Safety Program and the CEA. The purpose of these experiments was to create three benchmarks for the verification and validation of radiation transport codes and evaluated nuclear data used in the analysis of criticality accident alarm systems. This series of experiments consisted of three single-pulsed experiments with the SILENE reactor. For the first experiment, the reactor was bare (unshielded), whereas in the second and third experiments, it was shielded by lead and polyethylene, respectively. The polyethylene shield of the third experiment had a cadmium liner on its internal and external surfaces, which vertically was located near the fuel region of SILENE. During each experiment, several neutron activation foils and thermoluminescent dosimeters (TLDs) were placed around the reactor. Nearly half of the foils and TLDs had additional high-density magnetite concrete, high-density barite concrete, standard concrete, and/or BoroBond shields. CEA Saclay provided all the concrete, and the US Y-12 National Security Complex provided the BoroBond. Measurement data from the experiments were published at the 2011 International Conference on Nuclear Criticality (ICNC 2011) and the 2013 Nuclear Criticality Safety Division (NCSD 2013) topical meeting. Preliminary computational results for the first experiment were presented in the ICNC 2011 paper, which showed poor agreement between the computational results and the measured values of the foils shielded by concrete. Recently the hydrogen content, boron content, and density of these concrete shields were further investigated within the constraints of the previously available data. New computational results for the first experiment are now available

  5. Video systems for alarm assessment

    Energy Technology Data Exchange (ETDEWEB)

    Greenwoll, D.A.; Matter, J.C. (Sandia National Labs., Albuquerque, NM (United States)); Ebel, P.E. (BE, Inc., Barnwell, SC (United States))

    1991-09-01

    The purpose of this NUREG is to present technical information that should be useful to NRC licensees in designing closed-circuit television systems for video alarm assessment. There is a section on each of the major components in a video system: camera, lens, lighting, transmission, synchronization, switcher, monitor, and recorder. Each section includes information on component selection, procurement, installation, test, and maintenance. Considerations for system integration of the components are contained in each section. System emphasis is focused on perimeter intrusion detection and assessment systems. A glossary of video terms is included. 13 figs., 9 tabs.

  6. HYBRID ALARM SYSTEMS: COMBINING SPATIAL ALARMS AND ALARM LISTS FOR OPTIMIZED CONTROL ROOM OPERATION

    Energy Technology Data Exchange (ETDEWEB)

    Ronald L. Boring; J.J. Persensky

    2012-07-01

    The US Department of Energy (DOE) is sponsoring research, development, and deployment on Light Water Reactor Sustainability (LWRS), in which the Idaho National Laboratory (INL) is working closely with nuclear utilities to develop technologies and solutions to help ensure the safe operational life extension of current nuclear power plants. One of the main areas of focus is control room modernization. Within control room modernization, alarm system upgrades present opportunities to meet the broader goals of the LWRS project in demonstrating the use and safety of the advanced instrumentation and control (I&C) technologies and the short-term and longer term objectives of the plant. In this paper, we review approaches for and human factors issues behind upgrading alarms in the main control room of nuclear power plants.

  7. Automated Information System (AIS) Alarm System

    Energy Technology Data Exchange (ETDEWEB)

    Hunteman, W.

    1997-05-01

    The Automated Information Alarm System is a joint effort between Los Alamos National Laboratory, Lawrence Livermore National Laboratory, and Sandia National Laboratory to demonstrate and implement, on a small-to-medium sized local area network, an automated system that detects and automatically responds to attacks that use readily available tools and methodologies. The Alarm System will sense or detect, assess, and respond to suspicious activities that may be detrimental to information on the network or to continued operation of the network. The responses will allow stopping, isolating, or ejecting the suspicious activities. The number of sensors, the sensitivity of the sensors, the assessment criteria, and the desired responses may be set by the using organization to meet their local security policies.

  8. Improvement of the Seismic Alarm and the Spent Fuel Pool Instrumentation post Fukushima Dai-Ichi Accident

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Han Cheol; Joo, Choon Young; Shin, Kyung In; Choi, Jong Jae [KEPCO, Yongin (Korea, Republic of)

    2014-08-15

    After the Fukushima Dai-Ichi accident, various basic design features were revisited for the existing and new nuclear power plants. One of the topics was associated with the defense against the earthquakes. Among the variety of seismic designs of the plant systems, the design of the seismic alarm and the improvement of the spent fuel pool instrumentation for the conventional plant and MMIS-based plants in Korean are introduced in this paper. It briefly describes what has been requested or recommended by the US NRC and it introduces the enhancement designed for the following topics for SKN 1 and 2 plant and the SKN 3 and 4 plants, respectively.

  9. Nuclear power plant alarm systems: Problems and issues

    Energy Technology Data Exchange (ETDEWEB)

    O' Hara, J.M.; Brown, W.S.

    1991-01-01

    Despite the incorporation of advanced technology into nuclear power plant alarm systems, human factors problems remain. This paper identifies to be addressed in order to allow advanced technology to be used effectively in the design of nuclear power plant alarm systems. The operator's use and processing of alarm system information will be considered. Based upon a review of alarm system research, issues related to general system design, alarm processing, display and control are discussed. It is concluded that the design of effective alarm systems depends on an understanding of the information processing capabilities and limitations of the operator. 39 refs.

  10. Optimal alarm system applied in coffee rust

    Directory of Open Access Journals (Sweden)

    Luciene Resende Gonçalves

    2014-02-01

    Full Text Available Alarm systems have very great utility in detecting and warning of catastrophes. This methodology was applied via TARSO model with Bayesian estimation, serving as a forecasting mechanism for coffee rust disease. The coffee culture is very susceptible to this disease causing several records of incidence in most cultivated crops. Researches involving this limiting factor for production are intense and frequent, indicating environmental factors as responsible for the epidemics spread, which does not occur if these factors are not favorable. The fitting type used by the a posteriori probability, allows the system to be updated each time point. The methodology was applied to the rust index series in the presence of the average temperature series. Thus, it is possible to verify the alarm resulted or in a high catastrophe detection in points at which the catastrophe has not occurred, or in the low detections if the point was already in the catastrophe state.

  11. 46 CFR 161.002-12 - Manual fire alarm systems.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 6 2010-10-01 2010-10-01 false Manual fire alarm systems. 161.002-12 Section 161.002-12...: SPECIFICATIONS AND APPROVAL ELECTRICAL EQUIPMENT Fire-Protective Systems § 161.002-12 Manual fire alarm systems. (a) General. A manual fire alarm system shall consist of a power supply, a control unit on which...

  12. 46 CFR 76.05-5 - Manual alarm system.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Manual alarm system. 76.05-5 Section 76.05-5 Shipping... Fire Detecting and Extinguishing Equipment, Where Required § 76.05-5 Manual alarm system. (a) An approved manual alarm system shall be installed in all areas, other than the main machinery spaces,...

  13. 33 CFR 127.201 - Sensing and alarm systems.

    Science.gov (United States)

    2010-07-01

    ... (CONTINUED) WATERFRONT FACILITIES WATERFRONT FACILITIES HANDLING LIQUEFIED NATURAL GAS AND LIQUEFIED HAZARDOUS GAS Waterfront Facilities Handling Liquefied Natural Gas Equipment § 127.201 Sensing and alarm systems. (a) Fixed sensors must have audio and visual alarms in the control room and audio alarms...

  14. System for alarms analysis and optimization in petrochemicals plants; Sistema para analise e otimizacao de alarmes em plantas petroquimicas

    Energy Technology Data Exchange (ETDEWEB)

    Leitao, Gustavo; Pifer, Aderson; Guedes, Luiz Affonso [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil); Saito, Kaku; Aquino, Leonardo [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)

    2008-07-01

    The present work presents a group of algorithms, techniques and functionalities on alarms management which can be used efficiently on the treatment of 'disturbances' caused by the informal management of the alarm systems. Among the disturbances handled by these techniques, there is the recognition of intermittent alarms and false alarms, location of alarm floods and correlation between alarms, aiming the identification of communal root causes. The results will be presented through a case study on petrochemical alarm plants. At last, the results obtained by the utilization of such functionalities will be presented and discussed. (author)

  15. A revival of the alarm system: Making the alarm list useful during incidents

    Energy Technology Data Exchange (ETDEWEB)

    Larsson, J. E.; Oehman, B.; Calzada, A. [GoalArt, Scheelevaegen 17, 223 70 Lund (Sweden); Nihlwing, C.; Jokstad, H.; Kristianssen, L. I.; Kvalem, J. [IFE, OS alle 13, 1777 Halden (Norway); Lind, M. [Oested-DTU, Technical Univ. of Denmark, DK-2800, Kongens Lyngby (Denmark)

    2006-07-01

    In control rooms there are often problems with information overload, which means that the operators may receive more information than they are able to interpret. The most serious information overload occurs in two types of situations. The first is when the operating state of the plant changes, which often gives raise to a shower of alarms and events. Such an alarm shower is expected, but can be dangerous, because it may hide other alarms originating from unrelated faults. The second problem occurs when a fault causes several consequential faults, leading to a so-called alarm cascade. Because the alarms seldom arrive in correct time order, it can be very difficult to analyze such a cascade, and the information overload occurs in exactly the moment when a potentially dangerous situation starts. In an ongoing project, GoalArt and IFE are cooperating in testing and evaluating GoalArt's methods for alarm reduction and root cause analysis. The testing comprises two specific algorithms, root cause analysis and state-based alarm priority. The GoalArt system has been integrated with the HAMBO simulator so that operators can evaluate the algorithms on-line. (authors)

  16. Advanced Alarm Systems: Revision of Guidance and Its Technical Basis

    Science.gov (United States)

    2000-11-01

    Pressurized Water Reactor (Westinghouse) APWR Advanced Pressurized Water Reactor (Mitsubishi) ARP alarm response procedure CAMLS CANDU Annunciation Message...List System CANDU Canadian Deuterium Uranium CE Combustion Engineering CPIAS Critical Parameter Indication and Alarm System CRT cathode ray tube ...bulletins and information notices; inspection and investigative reports; licensee event reports; and Commission papers and their attachments. NRC

  17. Alarm systems a guide to design, management and procurement

    CERN Document Server

    Engineering Equipment and Materials Users' Association. London

    2013-01-01

    Alarm systems form an essential part of the operator interfaces to large modern industrial facilities. They provide vital support to the operators by warning them of situations that need their attention and have an important role in preventing, controlling and mitigating the effects of abnormal situations. Since it was first published in 1999, EEMUA 191 has become the globally accepted and leading guide to good practice for all aspects of alarm systems. The guide, developed by users of alarm systems with input from the GB Health and Safety Executive, gives comprehensive guidance on designing, managing and procuring an effective alarm system. The new Third Edition has been comprehensively updated and includes guidance on implementing the alarm management philosophy in practice; applications in geographically distributed processes; and performance metrics and KPIs.

  18. Computational Human Performance Modeling For Alarm System Design

    Energy Technology Data Exchange (ETDEWEB)

    Jacques Hugo

    2012-07-01

    The introduction of new technologies like adaptive automation systems and advanced alarms processing and presentation techniques in nuclear power plants is already having an impact on the safety and effectiveness of plant operations and also the role of the control room operator. This impact is expected to escalate dramatically as more and more nuclear power utilities embark on upgrade projects in order to extend the lifetime of their plants. One of the most visible impacts in control rooms will be the need to replace aging alarm systems. Because most of these alarm systems use obsolete technologies, the methods, techniques and tools that were used to design the previous generation of alarm system designs are no longer effective and need to be updated. The same applies to the need to analyze and redefine operators’ alarm handling tasks. In the past, methods for analyzing human tasks and workload have relied on crude, paper-based methods that often lacked traceability. New approaches are needed to allow analysts to model and represent the new concepts of alarm operation and human-system interaction. State-of-the-art task simulation tools are now available that offer a cost-effective and efficient method for examining the effect of operator performance in different conditions and operational scenarios. A discrete event simulation system was used by human factors researchers at the Idaho National Laboratory to develop a generic alarm handling model to examine the effect of operator performance with simulated modern alarm system. It allowed analysts to evaluate alarm generation patterns as well as critical task times and human workload predicted by the system.

  19. ARC Code TI: Optimal Alarm System Design and Implementation

    Data.gov (United States)

    National Aeronautics and Space Administration — An optimal alarm system can robustly predict a level-crossing event that is specified over a fixed prediction horizon. The code contained in this packages provides...

  20. Development of a GLE Alarm System Based Upon Neutron Monitors

    Science.gov (United States)

    Kuwabara, T.; Bieber, J. W.; Clem, J.; Evenson, P.; Pyle, R.

    2005-12-01

    We have developed a system that watches for count rate increases recorded in real time by eight neutron monitors, and gives an alarm when a Ground Level Enhancement (GLE) is detected. In this work, we determine optimal strategies for detecting the GLE event at a very early stage, while still keeping the false alarm rate from glitches at a very low level. The January 20, 2005 event will be used to illustrate our methods. A reliable system is developed with an algorithm that produces alarms in three levels according to the number of stations showing an increase. We study past events to optimize appropriate intensity threshold values and a baseline to determine the intensity increase. At the highest level alarm produced by the three stations increase, a false alarm rate expected from the observed data during the past five years become zero. Alarm times of GLEs examined from the most recent nine events are compared with satellite proton data. The GLE alert would precede the earliest alert from GOES (100 MeV or 10 MeV protons) by ~10-20 minutes. For the January 20 event, the GLE alert (3 stations) was generated 12 minutes prior to the earliest GOES alert. The realtime GLE data may be viewed at http://neutronm.bartol.udel.edu/spaceweather. An automated e-mail alert system is under development. Supported by NSF grants ATM-0207196 and ATM-0000315.

  1. Implementation of alarm system for vibration monitoring of KOMAC facility

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Jae-Ha; Ahn, Tae-Sung; Song, Young-Gi; Kwon, Hyeok-Jung; Cho, Yong-Sub [KOMAC, Gyeongju (Korea, Republic of)

    2015-05-15

    For operating 100 MeV linac, Devices have to be operated in certain order. Thus malfunction of a device cause damage to linac and related devices. To protect linac, machine protect system (MPS) has been developed. The MPS protects the components by monitoring hardwired signals. When values of operating parameters go beyond or below limit, alarm will be generated and interlock system which stops related devices in certain sequence will run. Other factor, giving damage to linac is disaster. A strong vibration such as earthquake causes malfunction of devices and damage to linac. Against disaster, the monitoring system based on Experimental Physics and Industrial Control System (EPICS) was implemented. Configuration and Implementation of the monitoring system are presented and some preliminary results are reported. KOMAC implemented alarm system for a strong vibration and fire. Alarm is generated in unusual situation. Coping rapidly with situation, damages for Linac and related devices can be reduced.

  2. Nuclear-power-plant perimeter-intrusion alarm systems

    Energy Technology Data Exchange (ETDEWEB)

    Halsey, D.J.

    1982-04-01

    Timely intercept of an intruder requires the examination of perimeter barriers and sensors in terms of reliable detection, immediate assessment and prompt response provisions. Perimeter security equipment and operations must at the same time meet the requirements of the Code of Federal Regulations, 10 CFR 73.55 with some attention to the performance and testing figures of Nuclear Regulatory Guide 5.44, Revision 2, May 1980. A baseline system is defined which recommends a general approach to implementing perimeter security elements: barriers, lighting, intrusion detection, alarm assessment. The baseline approach emphasizes cost/effectiveness achieved by detector layering and logic processing of alarm signals to produce reliable alarms and low nuisance alarm rates. A cost benefit of layering along with video assessment is reduction in operating expense. The concept of layering is also shown to minimize testing costs where detectability performance as suggested by Regulatory Guide 5.44 is to be performed. Synthesis of the perimeter intrusion alarm system and limited testing of CCTV and Video Motion Detectors (VMD), were performed at E-Systems, Greenville Division, Greenville, Texas during 1981.

  3. Integrated alarm annunciation and entry control systems -- Survey results

    Energy Technology Data Exchange (ETDEWEB)

    Clever, J.J.; Arakaki, L.H.; Monaco, F.M.; Juarros, L.E.; Quintana, G.R.

    1993-10-01

    This report provides the results and analyses of a detailed survey undertaken in Summer 1993 to address integrated intrusion detection alarm annunciation and entry control system issues. This survey was undertaken as a first attempt toward beginning to answer questions about integrated systems and commercial capabilities to meet or partially meet US Department of Energy (DOE) site needs.

  4. Hierarchies of Alarms for Large Distributed Systems

    CERN Document Server

    Boccioli, M; Martos, V; Holme, O

    2014-01-01

    The control systems of most of the infrastructure at CERN make use of the SCADA package WinCC Open Architecture by ETM*, including successful projects to control large scale systems such as the Large Hadron Collider (LHC) accelerator and associated experiments.).

  5. A WSN-Based Intrusion Alarm System to Improve Safety in Road Work Zones

    Directory of Open Access Journals (Sweden)

    Jose Martin

    2016-01-01

    Full Text Available Road traffic accidents are one of the main causes of death and disability worldwide. Workers responsible for maintaining and repairing roadways are especially prone to suffer these events, given their exceptional exposure to traffic. Since these actuations usually coexist with regular traffic, an errant driver can easily intrude the work area and provoke a collision. Some authors have proposed mechanisms aimed at detecting breaches in the work zone perimeter and alerting workers, which are collectively called intrusion alarm systems. However, they have several limitations and have not yet fulfilled the necessities of these scenarios. In this paper, we propose a new intrusion alarm system based on a Wireless Sensor Network (WSN. Our system is comprised of two main elements: vehicle detectors that form a virtual barrier and detect perimeter breaches by means of an ultrasonic beam and individual warning devices that transmit alerts to the workers. All these elements have a wireless communication interface and form a network that covers the whole work area. This network is in charge of transmitting and routing the alarms and coordinates the behavior of the system. We have tested our solution under real conditions with satisfactory results.

  6. Reducing SCADA System Nuisance Alarms in the Water Industry in Northern Ireland.

    Science.gov (United States)

    O'Donoghue, Nigel; Phillips, Debra H; Nicell, Ciaran

    2015-08-01

    The advancement of telemetry control for the water industry has increased the difficulty of managing large volumes of nuisance alarms (i.e., alarms that do not require a response). The aim of this study was to identify and reduce the number of nuisance alarms that occur for Northern Ireland (NI) Water by carrying out alarm duration analysis to determine the appropriate length of persistence (an advanced alarm management tool) that could be applied. All data were extracted from TelemWeb (NI Water's telemetry monitoring system) and analyzed in Excel. Over a 6-week period, an average of 40 000 alarms occurred per week. The alarm duration analysis, which has never been implemented before by NI Water, found that an average of 57% of NI Water alarms had a duration of <5 minutes. Applying 5-minute persistence, therefore, could prevent an average 26 816 nuisance alarms per week. Most of these alarms were from wastewater assets.

  7. 46 CFR 113.25-8 - Distribution of general emergency alarm system feeders and branch circuits.

    Science.gov (United States)

    2010-10-01

    ... Systems § 113.25-8 Distribution of general emergency alarm system feeders and branch circuits. (a) Each... alarm signal. (e) Each system must have one or more branch circuit distribution panels for each zone... 46 Shipping 4 2010-10-01 2010-10-01 false Distribution of general emergency alarm system...

  8. Masters Thesis- Criticality Alarm System Design Guide with Accompanying Alarm System Development for the Radioisotope Production Laboratory in Richland, Washington

    Energy Technology Data Exchange (ETDEWEB)

    Greenfield, Bryce A. [Univ. of New Mexico, Albuquerque, NM (United States)

    2009-12-01

    A detailed instructional manual was created to guide criticality safety engineers through the process of designing a criticality alarm system (CAS) for Department of Energy (DOE) hazard class 1 and 2 facilities. Regulatory and technical requirements were both addressed. A list of design tasks and technical subtasks are thoroughly analyzed to provide concise direction for how to complete the analysis. An example of the application of the design methodology, the Criticality Alarm System developed for the Radioisotope Production Laboratory (RPL) of Richland, Washington is also included. The analysis for RPL utilizes the Monte Carlo code MCNP5 for establishing detector coverage in the facility. Significant improvements to the existing CAS were made that increase the reliability, transparency, and coverage of the system.

  9. A Fiber-Optical Intrusion Alarm System Based on Quasi-Distributed Fiber Bragg Grating Sensors

    Institute of Scientific and Technical Information of China (English)

    Qi Jiang; Yun-Jiang Rao; De-Hong Zeng

    2008-01-01

    A fiber-optical intrusion alarm system based on quasi-distributed fiber Bragg grating (FBG) sensors is demonstrated in this paper. The algorithms of empirical mode decomposition (EMD) and wavelet packet characteristic entropy are adopted to determine the intrusion location. The intrusion alarm software based on the Labview is developed, and it is also proved by the experiments. The results show that such a fiber-optical intrusion alarm system can offer the automatic intrusion alarm in real-time.

  10. A NEW INVENTION OF ALARM REMINDER LOCKING (ARL SECURITY SYSTEM

    Directory of Open Access Journals (Sweden)

    M.S.M. Effendi

    2016-02-01

    Full Text Available Alarm Reminder Locking (ARL Security System mainly focuses on a door security system, which can install in the door area to increase the security level for home, office room, hostel or other places. This system used Arduino Controller and Global System for Mobile Communication (GSM technology, which is the cheapest source to embed the security system to transmit the Short Message Service (SMS alert data. This device integrates three functions that are alarming, reminder and locked for a purpose of safety and connecting via mobile phone to remind the users through SMS. This device has a 3 modes of operation which is the system will be functional when the door is not improperly closed for the first reminder with the buzzer alert. The second mode is automated locked will be activated when users closed the door, but did not lock manually. Intrusion mode will activate while auto locked modes are interrupted without proper access. All this integrated system will provide high security access against intrusion occurrence. This security device will bring a new benefit to the user to consider about the userfriendly application, low power consumption and reasonable cost to install.

  11. Integration of criticality alarm system at a fuel manufacturing facility

    Energy Technology Data Exchange (ETDEWEB)

    Longinov, M.; Pant, A. [Zircatec Precision Industries, Port Hope, Ontario (Canada)

    2005-07-01

    In response to the Power Uprate program at Bruce Power, Zircatec has committed to introduce, by Spring 2006 a new manufacturing line for the production of 43 element CANFLEX bundles containing Slightly Enriched Uranium (SEU) with a centre pin of blended dysprosia/urania (BDU). This is a new fuel design and is the first change in fuel design since the introduction of the current 37 element fuel over 20 years ago. As the primary fuel supplier to the reactor site that has chosen to utilize this new fuel design, Zircatec has agreed to manufacture and supply this new fuel at their facility in Port Hope, Ontario. Under this agreement, Zircatec is challenged with converting a fuel manufacturing facility to include the processing of enriched uranium. The challenge is to introduce the new concept of criticality control to a facility that traditionally does not have to deal with such a concept. One of the elements of the implementation is the criticality detection and alarm system - CIDAS. Since a criticality could go undetected by human senses, one of the methods of ensuring safety from radiation exposure in the event of a criticality is the installation of a criticality incident detection and alarm system. This early warning device could be the difference between low dose exposure and lethal exposure. This paper describes the challenges that Zircatec has faced with the installation of a criticality incident detection and alarm system. These challenges include determining the needs and requirements, determining appropriate specifications, selecting the right equipment, installing the equipment and training personnel in the operation of the new equipment. (author)

  12. 33 CFR 149.135 - What should be marked on the cargo transfer system alarm switch?

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false What should be marked on the cargo transfer system alarm switch? 149.135 Section 149.135 Navigation and Navigable Waters COAST GUARD... switch? Each switch for activating an alarm, and each audio or visual device for signaling an alarm,...

  13. Alert System for High Speed Vehicles to Avoid Wildlife Accidents

    Directory of Open Access Journals (Sweden)

    Rana Biswas

    2016-01-01

    Full Text Available “Alert System for High Speed Vehicles to Avoid Wildlife Accidents” is an alert system used to safeguard our wildlife. We often hear of various accidents of wild animals like elephant, nilgai etc., who are trying to cross the railway track. So, an intelligent electronics system is necessary which can be affixed to avoid the possibilities of accidents. Regarding this, in our project we are using a Passive Infrared Sensor (PIR sensor which is an electronic sensor that measures infrared (IR light radiating from objects in its field of view and switches ON any electrical/electronic device to which it is connected to. The key component of the sensor module is the pyroelectric element. All objects with a temperature above absolute zero emit heat energy in the form of radiation. Usually this radiation is invisible to the human eye because it is radiated at infrared wavelengths, but it is detected by this PIR sensor. This sensor does not radiate any energy for detection purposes and thus, it has no harmful effects on living beings. In our project the PIR sensor is used as a part of a burglar alarm and the electronic in the PIR typically control a small relay. This relay completes the circuit across a pair of electrical contacts connected to a detection input zone of the burglar alarm control panel. The system is usually designed such that if no living creature is being detected, the relay contact is closed- a „normally closed‟ (NC relay. If energy emitted from any nearby creature is detected, the relay opens, triggering the alarm, a signal will be directly sent to the driver‟s chamber and it will create a message in the LED screen of his chamber also an alarm will be heard which we have implemented using an ultrasonic sensor hc-sr04.

  14. A High-confidence Cyber-Physical Alarm System: Design and Implementation

    CERN Document Server

    Ma, Longhua; Xia, Feng; Xu, Ming; Yao, Jun; Shao, Meng

    2010-01-01

    Most traditional alarm systems cannot address security threats in a satisfactory manner. To alleviate this problem, we developed a high-confidence cyber-physical alarm system (CPAS), a new kind of alarm systems. This system establishes the connection of the Internet (i.e. TCP/IP) through GPRS/CDMA/3G. It achieves mutual communication control among terminal equipments, human machine interfaces and users by using the existing mobile communication network. The CPAS will enable the transformation in alarm mode from traditional one-way alarm to two-way alarm. The system has been successfully applied in practice. The results show that the CPAS could avoid false alarms and satisfy residents' security needs.

  15. Human factors engineering guidance for the review of advanced alarm systems

    Energy Technology Data Exchange (ETDEWEB)

    O`Hara, J.M.; Brown, W.S.; Higgins, J.C.; Stubler, W.F. [Brookhaven National Lab., Upton, NY (United States)

    1994-09-01

    This report provides guidance to support the review of the human factors aspects of advanced alarm system designs in nuclear power plants. The report is organized into three major sections. The first section describes the methodology and criteria that were used to develop the design review guidelines. Also included is a description of the scope, organization, and format of the guidelines. The second section provides a systematic review procedure in which important characteristics of the alarm system are identified, described, and evaluated. The third section provides the detailed review guidelines. The review guidelines are organized according to important characteristics of the alarm system including: alarm definition; alarm processing and reduction; alarm prioritization and availability; display; control; automated; dynamic, and modifiable characteristics; reliability, test, maintenance, and failure indication; alarm response procedures; and control-display integration and layout.

  16. Aerospace Accident - Injury Autopsy Data System -

    Data.gov (United States)

    Department of Transportation — The Aerospace Accident Injury Autopsy Database System will provide the Civil Aerospace Medical Institute (CAMI) Aerospace Medical Research Team (AMRT) the ability to...

  17. A Human Factors Perspective on Alarm System Research and Development 2000 to 2010

    Energy Technology Data Exchange (ETDEWEB)

    Curt Braun; John Grimes; Eric Shaver; Ronald Boring (Principal Investigator)

    2011-09-01

    By definition, alarms serve to notify human operators of out-of-parameter conditions that could threaten equipment, the environment, product quality and, of course, human life. Given the complexities of industrial systems, human machine interfaces, and the human operator, the understanding of how alarms and humans can best work together to prevent disaster is continually developing. This review examines advances in alarm research and development from 2000 to 2010 and includes the writings of trade professionals, engineering and human factors researchers, and standards organizations with the goal of documenting advances in alarms system design, research, and implementation.

  18. Development and evaluation of new coupling system for lower limb prostheses with acoustic alarm system.

    Science.gov (United States)

    Eshraghi, Arezoo; Osman, Noor Azuan Abu; Gholizadeh, Hossein; Ahmadian, Jalil; Rahmati, Bizhan; Abas, Wan Abu Bakar Wan

    2013-01-01

    Individuals with lower limb amputation need a secure suspension system for their prosthetic devices. A new coupling system was developed that is capable of suspending the prosthesis. The system's safety is ensured through an acoustic alarm system. This article explains how the system works and provides an in vivo evaluation of the device with regard to pistoning during walking. The system was designed to be used with silicone liners and is based on the requirements of prosthetic suspension systems. Mechanical testing was performed using a universal testing machine. The pistoning during walking was measured using a motion analysis system. The new coupling device produced significantly less pistoning compared to a common suspension system (pin/lock). The safety alarm system would buzz if the suspension was going to fail. The new coupling system could securely suspend the prostheses in transtibial amputees and produced less vertical movement than the pin/lock system.

  19. Design of alarm systems in Swedish nuclear power plants; Utformning av larmsystem i svenska kaernkraftverk

    Energy Technology Data Exchange (ETDEWEB)

    Thunberg, Anna; Osvalder, Anna-Lisa (Dept. of Product and Production Development, Chalmers Univ. of Technology, Goeteborg (Sweden))

    2008-04-15

    Research within the area of improving alarm system design and performance has mainly focused on new alarm systems. However, smaller modernisations of legacy systems are more common in the Swedish nuclear industry than design of totally new systems. This imposes problems when the new system should function together with the old system. This project deals with the special concerns raised by modernisation projects. The objective of the project has been to increase the understanding of the relationship between the operator's performance and the design of the alarm system. Of major concern has been to consider the cognitive abilities of the operator, different operator roles and work situations, and varying need of information. The aim of the project has been to complement existing alarm design guidance and to develop user-centred alarm design concepts. Different case studies have been performed in several industry sectors (nuclear, oil refining, pulp and paper, aviation and medical care) to identify best practice. Several empirical studies have been performed within the nuclear area to investigate the operator's need of information, performance and workload in different operating modes. The aspect of teamwork has also been considered. The analyses show that the operator has different roles in different work situations which affect both the type of information needed and how the information is processed. In full power operation, the interaction between the operator and the alarm system is driven by internal factors and the operator tries to maintain high situation awareness by actively searching for information. The operator wants to optimise the process and need detailed information with possibilities to follow-up and get historical data. In disturbance management, the operator is more dependent on external information presented by the alarm system. The new compilation of alarm guidance is based on the operator's varying needs in different working

  20. Nitric Acid Revamp and Upgrading of the Alarm & Protection Safety System at Petrokemija, Croatia

    Directory of Open Access Journals (Sweden)

    Hoško, I.

    2012-04-01

    Full Text Available Every industrial production, particularly chemical processing, demands special attention in conducting the technological process with regard to the security requirements. For this reason, production processes should be continuously monitored by means of control and alarm safety instrumented systems. In the production of nitric acid at Petrokemija d. d., the original alarm safety system was designed as a combination of an electrical relay safety system and transistorized alarm module system. In order to increase safety requirements and modernize the technological process of nitric acid production, revamping and upgrading of the existing alarm safety system was initiated with a new microprocessor system. The newly derived alarm safety system, Simatic PCS 7, links the function of "classically" distributed control (DCS and logical systems in a common hardware and software platform with integrated engineering tools and operator interface to meet the minimum safety standards with safety integrity level 2 (SIL2 up to level 3 (SIL3, according to IEC 61508 and IEC 61511. This professional paper demonstrates the methodology of upgrading the logic of the alarm safety system in the production of nitric acid in the form of a logical diagram, which was the basis for a further step in its design and construction. Based on the mentioned logical diagram and defined security requirements, the project was implemented in three phases: analysis and testing, installation of the safety equipment and system, and commissioning. Developed also was a verification system of all safety conditions, which could be applied to other facilities for production of nitric acid. With the revamped and upgraded interlock alarm safety system, a new and improved safety boundary in the production of nitric acid was set, which created the foundation for further improvement of the production process in terms of improved analysis.

  1. Development of a ground level enhancement alarm system based upon neutron monitors

    Science.gov (United States)

    Kuwabara, T.; Bieber, J. W.; Clem, J.; Evenson, P.; Pyle, R.

    2006-10-01

    We have developed a system that watches for count rate increases recorded in real time by eight neutron monitors, which triggers an alarm if a ground level enhancement (GLE) is detected. In this work, we determine optimal strategies for detecting the GLE event at a very early stage, while still keeping the false alarm rate at a very low level. We study past events to optimize appropriate intensity threshold values and a baseline to determine the intensity increase. The highest-level alarm, which we term an "alert," is generated when a 4% increase is recorded at three stations in 3 min averaged data. At this level, the false alarm rate obtained by backtesting over the past 4.4 years is zero. Ten GLEs occurred in this period, and our system produced GLE alarms for nine events. Alarm times for these nine events are compared with satellite proton data. The GLE alert precedes the earliest alert from GOES (100 MeV or 10 MeV protons) by ˜10-30 min. Real-time GLE data may be viewed at http://neutronm.bartol.udel.edu/spaceweather. An automated e-mail alert system is under development.

  2. A new fire alarm system for electrical installations

    CERN Document Server

    Pietersen, A H

    1978-01-01

    Fires in electrical installations are considered to develop in four phases - initiation, smouldering, flame formation and heat development. Cables are among the more sensitive components, with working temperatures around 50 degrees C and fire detection at 70 degrees C. Conventional alarms include smoke detectors. The new technique described uses microcapsules containing powder forming a gas of the Freon type after diffusion. A typical microcapsule loses 4% per year and has a natural life of 10 years. Fabrication methods are described. Detection is by gas concentration, with a sensitivity of 1 to 10 ppm, or by acoustic methods with microphones to pick up the sound of fractures. Pressure/temperature characteristics of various types of Freon mixtures commercially available are given in graphical form.

  3. Alarm systems detect volcanic tremor and earthquake swarms during Redoubt eruption, 2009

    Science.gov (United States)

    Thompson, G.; West, M. E.

    2009-12-01

    We ran two alarm algorithms on real-time data from Redoubt volcano during the 2009 crisis. The first algorithm was designed to detect escalations in continuous seismicity (tremor). This is implemented within an application called IceWeb which computes reduced displacement, and produces plots of reduced displacement and spectrograms linked to the Alaska Volcano Observatory internal webpage every 10 minutes. Reduced displacement is a measure of the amplitude of volcanic tremor, and is computed by applying a geometrical spreading correction to a displacement seismogram. When the reduced displacement at multiple stations exceeds pre-defined thresholds and there has been a factor of 3 increase in reduced displacement over the previous hour, a tremor alarm is declared. The second algorithm was to designed to detect earthquake swarms. The mean and median event rates are computed every 5 minutes based on the last hour of data from a real-time event catalog. By comparing these with thresholds, three swarm alarm conditions can be declared: a new swarm, an escalation in a swarm, and the end of a swarm. The end of swarm alarm is important as it may mark a transition from swarm to continuous tremor. Alarms from both systems were dispatched using a generic alarm management system which implements a call-down list, allowing observatory scientists to be called in sequence until someone acknowledged the alarm via a confirmation web page. The results of this simple approach are encouraging. The tremor alarm algorithm detected 26 of the 27 explosive eruptions that occurred from 23 March - 4 April. The swarm alarm algorithm detected all five of the main volcanic earthquake swarm episodes which occurred during the Redoubt crisis on 26-27 February, 21-23 March, 26 March, 2-4 April and 3-7 May. The end-of-swarm alarms on 23 March and 4 April were particularly helpful as they were caused by transitions from swarm to tremor shortly preceding explosive eruptions; transitions which were

  4. Design of alarm systems in Swedish nuclear power plants; Utformning av larmsystem i svenska kaernkraftverk

    Energy Technology Data Exchange (ETDEWEB)

    Thunberg, Anna; Osvalder, Anna-Lisa (Dept. of Product and Production Development, Chalmers Univ. of Technology, Goeteborg (Sweden))

    2008-04-15

    Research within the area of improving alarm system design and performance has mainly focused on new alarm systems. However, smaller modernisations of legacy systems are more common in the Swedish nuclear industry than design of totally new systems. This imposes problems when the new system should function together with the old system. This project deals with the special concerns raised by modernisation projects. The objective of the project has been to increase the understanding of the relationship between the operator's performance and the design of the alarm system. Of major concern has been to consider the cognitive abilities of the operator, different operator roles and work situations, and varying need of information. The aim of the project has been to complement existing alarm design guidance and to develop user-centred alarm design concepts. Different case studies have been performed in several industry sectors (nuclear, oil refining, pulp and paper, aviation and medical care) to identify best practice. Several empirical studies have been performed within the nuclear area to investigate the operator's need of information, performance and workload in different operating modes. The aspect of teamwork has also been considered. The analyses show that the operator has different roles in different work situations which affect both the type of information needed and how the information is processed. In full power operation, the interaction between the operator and the alarm system is driven by internal factors and the operator tries to maintain high situation awareness by actively searching for information. The operator wants to optimise the process and need detailed information with possibilities to follow-up and get historical data. In disturbance management, the operator is more dependent on external information presented by the alarm system. The new compilation of alarm guidance is based on the operator's varying needs in different working

  5. An Intrusion Alarming System Based on Self- Similarity of Network Traffic

    Institute of Scientific and Technical Information of China (English)

    YU Fei; ZHU Miao-liang; CHEN Yu-feng; LI Ren-fa; XU Cheng

    2005-01-01

    Intrusion detection system can make effective alarm for illegality of network users, which is absolutely necessarily and important to build security environment of communication base service. According to the principle that the number of network traffic can affect the degree of self-similar traffic, the paper investigates the variety of self-similarity resulted from unconventional network traffic. A network traffic model based on normal behaviors of user is proposed and the Hurst parameter of this model can be calculated. By comparing the Hurst parameter of normal traffic and the self-similar parameter, we can judge whether the network is normal or not and alarm in time.

  6. The Wireless Environment Monitoring Alarm System Based on Self-organizing Network

    Directory of Open Access Journals (Sweden)

    Zhang Huawei

    2016-01-01

    Full Text Available Under complicated conditions, it is necessary for environmental monitoring to design a wireless monitoring alarm system which can replace the wired system or as a supplement. The system discussed here bases on ARM7 microprocessor named LPC1114 and transceiver module named CC2530. With ZigBee, CSM/GPRS, this system uses multiple sensors to self-organized form a data acquisition and monitoring network system with variety of sensors fusion in the region. The system has some characteristics such as quick, convenient and accurate. Combining with the GSM SMS or GPRS alarm, the system can accurately and reliably monitor temperature, humidity and other environmental factors, and realize remote monitoring in large area and the complicated environment. Thus, this system has high practical value.

  7. Neural Network Target Identification System for False Alarm Reduction

    Science.gov (United States)

    Ye, David; Edens, Weston; Lu, Thomas T.; Chao, Tien-Hsin

    2009-01-01

    A multi-stage automated target recognition (ATR) system has been designed to perform computer vision tasks with adequate proficiency in mimicking human vision. The system is able to detect, identify, and track targets of interest. Potential regions of interest (ROIs) are first identified by the detection stage using an Optimum Trade-off Maximum Average Correlation Height (OT-MACH) filter combined with a wavelet transform. False positives are then eliminated by the verification stage using feature extraction methods in conjunction with neural networks. Feature extraction transforms the ROIs using filtering and binning algorithms to create feature vectors. A feed forward back propagation neural network (NN) is then trained to classify each feature vector and remove false positives. This paper discusses the test of the system performance and parameter optimizations process which adapts the system to various targets and datasets. The test results show that the system was successful in substantially reducing the false positive rate when tested on a sonar image dataset.

  8. Expert System Constant False Alarm Rate (CFAR) Processor

    Science.gov (United States)

    2006-09-01

    Processor has been developed on a Sun Sparc Station 4/470 using a commercial-off-the-shelf software development package called G2 by Gensym Corporation...size of the training data set. A prototype expert system CFAR Processor has been presented which applies artificial intelligence to CFAR detection

  9. Smart container UWB sensor system for situational awareness of intrusion alarms

    Science.gov (United States)

    Romero, Carlos E.; Haugen, Peter C.; Zumstein, James M.; Leach, Jr., Richard R.; Vigars, Mark L.

    2013-06-11

    An in-container monitoring sensor system is based on an UWB radar intrusion detector positioned in a container and having a range gate set to the farthest wall of the container from the detector. Multipath reflections within the container make every point on or in the container appear to be at the range gate, allowing intrusion detection anywhere in the container. The system also includes other sensors to provide false alarm discrimination, and may include other sensors to monitor other parameters, e.g. radiation. The sensor system also includes a control subsystem for controlling system operation. Communications and information extraction capability may also be included. A method of detecting intrusion into a container uses UWB radar, and may also include false alarm discrimination. A secure container has an UWB based monitoring system

  10. Control Engineering Embraces Instrumentation and Alarm Systems Of Navy

    Directory of Open Access Journals (Sweden)

    Gheorghe Samoilescu

    2008-10-01

    Full Text Available Control engineering can be applied not only to propelling and auxiliary machinery but also to electrical installations, refrigeration, cargo handling (especially in tankers and deck machinery, e.g. Windlass control. Opinion still vary on such matters as the relative merits of pneumatic versus electronic system and whether the control center should be in the engine room or adjacent to the navigating bridge. Arguments against the exclusion of the engineer officer from close contact with the machinery are countered by the fact that electronic systems are based on changes other than those of human response. Automated ships (UMS operate closer to prescribed standards and therefore operate with greater efficiency. The closer control of machinery operating conditions (cooling water temperatures and pressures, permits machinery to be run at its optimum design conditions, making for fuel economy and reduced maintenance.

  11. Early warning, warning or alarm systems for natural hazards? A generic classification.

    Science.gov (United States)

    Sättele, Martina; Bründl, Michael; Straub, Daniel

    2013-04-01

    Early warning, warning and alarm systems have gained popularity in recent years as cost-efficient measures for dangerous natural hazard processes such as floods, storms, rock and snow avalanches, debris flows, rock and ice falls, landslides, flash floods, glacier lake outburst floods, forest fires and even earthquakes. These systems can generate information before an event causes loss of property and life. In this way, they mainly mitigate the overall risk by reducing the presence probability of endangered objects. These systems are typically prototypes tailored to specific project needs. Despite their importance there is no recognised system classification. This contribution classifies warning and alarm systems into three classes: i) threshold systems, ii) expert systems and iii) model-based expert systems. The result is a generic classification, which takes the characteristics of the natural hazard process itself and the related monitoring possibilities into account. The choice of the monitoring parameters directly determines the system's lead time. The classification of 52 active systems moreover revealed typical system characteristics for each system class. i) Threshold systems monitor dynamic process parameters of ongoing events (e.g. water level of a debris flow) and incorporate minor lead times. They have a local geographical coverage and a predefined threshold determines if an alarm is automatically activated to warn endangered objects, authorities and system operators. ii) Expert systems monitor direct changes in the variable disposition (e.g crack opening before a rock avalanche) or trigger events (e.g. heavy rain) at a local scale before the main event starts and thus offer extended lead times. The final alarm decision incorporates human, model and organisational related factors. iii) Model-based expert systems monitor indirect changes in the variable disposition (e.g. snow temperature, height or solar radiation that influence the occurrence probability

  12. Distributed error and alarm processing in the CMS data acquisition system

    CERN Document Server

    Bauer, Gerry; Bowen, Matthew; Branson, James; Bukowiec, Sebastian Czeslaw; Cittolin, Sergio; Coarasa, J A; Deldicque, Christian; Dobson, Marc; Dupont, Aymeric; Erhan, Samim; Flossdorf, Alexander; Gigi, Dominique; Glege, Frank; Gomez-Reino, R; Hartl, Christian; Hegeman, Jeroen Guido; Holzner, Andre Georg; Hwong, Yi Ling; Masetti, Lorenzo; Meijers, Franciscus; Meschi, Emilio; Mommsen, Remigius; O'Dell, Vivian; Orsini, Luciano; Paus, Christoph Maria Ernst; Petrucci, Andrea; Pieri, Marco; Polese, Giovanni; Racz, Attila; Raginel, Olivier; Sakulin, Hannes; Sani, Matteo; Schwick, Christoph; Shpakov, Denis; Simon, M; Spataru, Andrei Cristian; Sumorok, Konstanty

    2012-01-01

    The error and alarm system for the data acquisition of the Compact Muon Solenoid (CMS) at CERN was successfully used for the physics runs at Large Hadron Collider (LHC) during first three years of activities. Error and alarm processing entails the notification, collection, storing and visualization of all exceptional conditions occurring in the highly distributed CMS online system using a uniform scheme. Alerts and reports are shown on\\-line by web application facilities that map them to graphical models of the system as defined by the user. A persistency service keeps a history of all exceptions occurred, allowing subsequent retrieval of user defined time windows of events for later playback or analysis. This paper describes the architecture and the technologies used and deals with operational aspects during the first years of LHC operation. In particular we focus on performance, stability, and integration with the CMS sub\\-detectors.

  13. Development of the Severe Accident Analysis DB for the Severe Accident Management Expert System (I)

    Energy Technology Data Exchange (ETDEWEB)

    Park, Soo Yong; Ahn, Kwang Il [KAERI, Daejeon (Korea, Republic of)

    2010-12-15

    This report contains analysis methodologies and calculation results of 5 initiating events of the severe accident analysis database system. The Ulchin 3,4 NPP has been selected as reference plants. Based on the probabilistic safety analysis of the corresponding plant, 54 accident scenarios, which was predicted to have more than 10-10 /ry occurrence frequency, have been analyzed as base cases for the Large loss of Coolant sequence database. The functions of the severe accident analysis database system will be to make a diagnosis of the accident by some input information from the plant symptoms, to search a corresponding scenario, and finally to provide the user phenomenological information based on the pre-analyzed results. The MAAP 4.06 calculation results in this report will be utilized as input data to develop the database system

  14. Exploration on a Modern Positive Social Alarming System%现代实证性社会预警的探索

    Institute of Scientific and Technical Information of China (English)

    阎耀军

    2005-01-01

    A new theoretical model of social alarming index system with its operational platforms was constructed on the basis of the research on modem positive social alarming systems at home and abroad. A retrospective evaluation of the state of social harmony and stability in China from 1985 to 2002 and a simulation of social alarming feedback loops empirically examined the effectiveness of this new social alarming index system.

  15. MMS and GPS car alarm system%彩信与GPS汽车防盗器

    Institute of Scientific and Technical Information of China (English)

    莫长江; 潘家富; 陈小明

    2011-01-01

    The system combines the use of GSM/GPRS module GPS module, bluetooth module implemented a full range of car anti-theft and navigation. The overall system settings through the phone numbers of car alarm systems, access systems are conducted after the broadcast operation of voice prompts, and system settings to achieve the control. The system has a vibration sensor, automotive side door sensor, ACC sensor with low-level sensor, such as trigger source. When the trigger is triggered, system can be redial preset alarm phone users, Coupled with the global real-time GPS positioning and navigation, MMS GPRS real-time monitoring and wireless remote control to operate at close range, to achieve global car alarm. The system is high stability because of a unique dual power control.%系统利用GSM/GPRS模块结合GPS模块、蓝牙模块实行对汽车进行全方位防盗和导航.系统的整体设置通过电话拨打汽车防盗系统号码,接通系统后,将进行语音播报操作提示,实现系统设置与汽车定位,彩信等控制.系统具有震动传感、车边门传感、ACC传感与电平过低传感等触发源,当触发源被触发后,系统可循环拨打用户预设的报警电话,实现汽车报警.该系统具有独特的双电源控制,稳定性高.

  16. Development of severe accident management and training support system

    Energy Technology Data Exchange (ETDEWEB)

    Jeong, Kwang Sub; Kim, Ko Ryo; Jung, Won Dae; Ha, Jae Joo

    2001-04-01

    Recently, the overall severe accident management strategy is under development according to the logical flow of severe accident management guidelines in some foreign countries. In Korea, the basis of severe accident management strategy is established due to the development of Korean severe accident guideline. In the straining system, the professional information as well as the general information for severe accident should be provided to the related personnel and the function of prior simulation for plant behavior according to strategy execution should be required. Korean severe accident management guideline is chosen as the basis logic for development of support system for decision-support and training related with execution of severe accident strategy. The training simulator is developed for prior expectation of plant behavior and the severe accident computer code, MELCOR, is utilized as the engine, and it is possible to operate equipments necessary for execution of severe accident management guidelines. And also, the graphical interface is developed to provide the plant status and provide status change of major equipments dynamically.

  17. Designing of an emergency call system for traffic accidents

    Directory of Open Access Journals (Sweden)

    Ziya Ekşi

    2013-06-01

    Full Text Available In our country, many people have been seriously injured or died in traffic accidents. Fatal accidents often occur because of not complying with traffic rules or carelessness. Except these driver mistakes, heavy injuries can result in deaths because of emergency aid teams failing to arrive to accident scene in time. In this study, an accident emergency call system is designed to help injured people's treatment as soon as possible by notifying emercengy team automatically in accidents. The designed system sends messages, including information such as vehicle location, exploding airbag number, vehicle model, age and registration plate, to emergency aid team using GPS module at the moment of crashed vehicle's airbag explosion.

  18. ALARMS: Alerting and Reasoning Management System for Next Generation Aircraft Hazards

    CERN Document Server

    Carlin, Alan S; Marecki, Janusz

    2012-01-01

    The Next Generation Air Transportation System will introduce new, advanced sensor technologies into the cockpit. With the introduction of such systems, the responsibilities of the pilot are expected to dramatically increase. In the ALARMS (ALerting And Reasoning Management System) project for NASA, we focus on a key challenge of this environment, the quick and efficient handling of aircraft sensor alerts. It is infeasible to alert the pilot on the state of all subsystems at all times. Furthermore, there is uncertainty as to the true hazard state despite the evidence of the alerts, and there is uncertainty as to the effect and duration of actions taken to address these alerts. This paper reports on the first steps in the construction of an application designed to handle Next Generation alerts. In ALARMS, we have identified 60 different aircraft subsystems and 20 different underlying hazards. In this paper, we show how a Bayesian network can be used to derive the state of the underlying hazards, based on the se...

  19. The event notification and alarm system for the Open Science Grid operations center

    Science.gov (United States)

    Hayashi, S.; Teige and, S.; Quick, R.

    2012-12-01

    The Open Science Grid Operations (OSG) Team operates a distributed set of services and tools that enable the utilization of the OSG by several HEP projects. Without these services users of the OSG would not be able to run jobs, locate resources, obtain information about the status of systems or generally use the OSG. For this reason these services must be highly available. This paper describes the automated monitoring and notification systems used to diagnose and report problems. Described here are the means used by OSG Operations to monitor systems such as physical facilities, network operations, server health, service availability and software error events. Once detected, an error condition generates a message sent to, for example, Email, SMS, Twitter, an Instant Message Server, etc. The mechanism being developed to integrate these monitoring systems into a prioritized and configurable alarming system is emphasized.

  20. Reducing False Alarms in Searches for Gravitational Waves from Coalescing Binary Systems

    CERN Document Server

    Rodriguez, Andres

    2008-01-01

    LIGO observatories in Livingston, LA and Hanford, WA may detect gravitational waves emitted from coalescing binary systems composed of two compact objects. In order to detect compact binary coalescence (CBC) events, LIGO searches utilize matched filtering techniques. Matched filtering is the optimal detection strategy for stationary, Gaussian noise, however, LIGO noise is often non-stationary, non-Gaussian. Non-stationary noise result in an excess of false candidate events, commonly known as false alarms. This thesis develops the r^2 test to reduce the false alarm rate for LIGO CBC searches. Results of the search for primordial black hole binary systems (where each object has less than 1M_solar), in LIGO's Third Science Run (S3) is also presented. Results of the r^2 test are shown for several LIGO CBC searches, including the binary neutron star searches in the Third and Fourth Science Runs (S3/S4), the S3/S4 primordial black hole searches, and the binary black hole search in the first three months of the Fift...

  1. An overview of process instrumentation, protective safety interlocks and alarm system at the JET facilities active gas handling system

    Energy Technology Data Exchange (ETDEWEB)

    Skinner, N. E-mail: ns@jet.uk; Brennan, P.; Brown, K.; Gibbons, C.; Jones, G.; Knipe, S.; Manning, C.; Perevezentsev, A.; Stagg, R.; Thomas, R.; Yorkshades, J

    2003-09-01

    The Joint European Torus (JET) Facilities Active Gas Handling System (AGHS) comprises ten interconnected processing sub-systems that supply, process and recover tritium from gases used in the JET Machine. Operations require a diverse range of process instrumentation to carry out a multiplicity of monitoring and control tasks and approximately 500 process variables are measured. The different types and application of process instruments are presented with specially adapted or custom-built versions highlighted. Forming part of the Safety Case for tritium operations, a dedicated hardwired interlock and alarm system provides an essential safety function. In the event of failure modes, each hardwired interlock will back-up software interlocks and shutdown areas of plant to a failsafe condition. Design of the interlock and alarm system is outlined and general methodology described. Practical experience gained during plant operations is summarised and the methods employed for routine functional testing of essential instrument systems explained.

  2. An information theory based complexity evaluation approach and example for advanced alarm processing system

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Hyun G.; Seong, Poong H. [Korea Advanced Institute of Science and Technology, Taejon (Korea, Republic of)

    1998-10-01

    In this paper, a model-based complexity evaluation approach is addressed in order to apply in early design phase of interface system. An effective model which predicts the complexity of human-computer interface including its contents is expected to provide practical guidance to designers. It is also expected to improve the human performance and to facilitate the system development. In order to overcome the demerits of conventional predictive models, a model which is based on the information theory and has cyclic property is developed. The proposed diagram, cyclic information flow (CIF) diagram, can describe the information flow around human operators, thus represent operator's cognitive workload. It also considers the signal processing and information providing methodology simultaneously. In order to show an application example, the advanced alarm processing system is evaluated using information theory based approach.

  3. Observation systems with alarm thresholds and their use in designing underground facilities

    Energy Technology Data Exchange (ETDEWEB)

    Olsson, Lars [Geostatistik AB, Tumba (Sweden); Stille, Haakan [Royal Inst. of Tech., Stockholm (Sweden). Div. of Soil and Rock Mechanics

    2002-08-01

    The decision-based methodology described has wide applications in the building process. It can be applied whenever the exact outcome of the work is not known and where countermeasures might be needed. One such application is in the pre-investigations for the siting of spent nuclear fuel facilities aimed at determining the criteria for abandoning work on a given site. It can be seen that the principles of for designing an observation system and determining the alarm threshold are well understood. Several possible theoretical tools are also known, albeit from other disciplines than civil engineering. However, the choice of tools for a real problem should be investigated so that the advantages and drawbacks are illustrated. Reliable methods for designing observation systems in practice are, however, not known and are therefore not in use. A continuation of this study should therefore be aimed at comparing different theoretical tools and examining their practical application, including Quality Assurance and updating. It is therefore suggested that an observation system with alarm thresholds etc should be designed using the principles described in this report and should include testing and comparison of different models for predicting behaviour. This work could be undertaken for a real or for a hypothetical project. A real project is, of course, more difficult but has all the real-world problems that must be solved. A very brief, and not theoretically fully developed, account of the application of an observation system during the expansion of the interim spent fuel storage facility CLAB is enclosed as Appendix 1. Some comments on proposed changes in the system based on the principles set forth in this report are given in Appendix 2.

  4. Alarming atmospheres

    DEFF Research Database (Denmark)

    Højlund, Marie; Kinch, Sofie

    2014-01-01

    . As a response to this situation, our design artefact, the interactive furniture Kidkit, invites children to become accustomed to the alarming sounds sampled from the ward while they are waiting in the waiting room. Our design acknowledges how atmospheres emerge as temporal negotiations between the rhythms......, a familiar relationship with the alarming sounds in the ward, enabling her to focus later more on the visit with the relative. The article discusses the proposed design strategy behind this solution and the potentiality for its use in hospital environments in general....

  5. [Violence and accidents among older and younger adults: evidence from the Surveillance System for Violence and Accidents (VIVA), Brazil].

    Science.gov (United States)

    Luz, Tatiana Chama Borges; Malta, Deborah Carvalho; Sá, Naíza Nayla Bandeira de; Silva, Marta Maria Alves da; Lima-Costa, Maria Fernanda

    2011-11-01

    Data from the Brazilian Surveillance System for Violence and Accidents (VIVA) in 2009 were used to examine socio-demographic characteristics, outcomes, and types of accidents and violence treated at 74 sentinel emergency services in 23 Brazilian State capitals and the Federal District. The analysis included 25,201 individuals aged > 20 years (10.1% > 60 years); 89.3% were victims of accidents and 11.9% victims of violence. Hospitalization was the outcome in 11.1% of cases. Compared to the general population, there were more men and non-white individuals among victims of accidents, and especially among victims of violence. As compared to younger adults (20-59 years), accidents and violence against elderly victims showed less association with alcohol, a higher proportion of domestic incidents, more falls and pedestrian accidents, and aggression by family members. Policies for the prevention of accidents and violence should consider the characteristics of these events in the older population.

  6. One-Piece Triboelectric Nanosensor for Self-Triggered Alarm System and Latent Fingerprint Detection.

    Science.gov (United States)

    Jie, Yang; Zhu, Huarui; Cao, Xia; Zhang, Yue; Wang, Ning; Zhang, Liqun; Wang, Zhong Lin

    2016-11-22

    Tactile sensing is of great importance in developing human-machine interface, remote control, and security systems. Here, a self-triggered alarm system based on the one-piece triboelectric nanosensor (TENS) is reported. By using nitrocellulose (NC) membrane as the triboelectric material, the as-designed TENS can not only sensitively respond to physical contacts in a self-triggered mode but also securely detect the third-level details of latent fingerprint. The self-triggered idea based on the triboelectric nanogenerator is compatible with intelligent interactive interface. Besides, this TENS can be conveniently fabricated and integrated into arrays at a large scale due to its freestanding, simple, and low-cost characteristics. This work presents alternative perspectives for the practical applications of the multifunctionalized TENS.

  7. Adaptive System Identification for Estimating Future Glucose Concentrations and Hypoglycemia Alarms.

    Science.gov (United States)

    Eren-Oruklu, Meriyan; Cinar, Ali; Rollins, Derrick K; Quinn, Lauretta

    2012-08-01

    Many patients with diabetes experience high variability in glucose concentrations that includes prolonged hyperglycemia or hypoglycemia. Models predicting a subject's future glucose concentrations can be used for preventing such conditions by providing early alarms. This paper presents a time-series model that captures dynamical changes in the glucose metabolism. Adaptive system identification is proposed to estimate model parameters which enable the adaptation of the model to inter-/intra-subject variation and glycemic disturbances. It consists of online parameter identification using the weighted recursive least squares method and a change detection strategy that monitors variation in model parameters. Univariate models developed from a subject's continuous glucose measurements are compared to multivariate models that are enhanced with continuous metabolic, physical activity and lifestyle information from a multi-sensor body monitor. A real life application for the proposed algorithm is demonstrated on early (30 min in advance) hypoglycemia detection.

  8. Analysis of Criticality Accident Transients of Uranium Solution System

    Institute of Scientific and Technical Information of China (English)

    DUAN; Ming-hui; DU; Kai-wen; LIU; Zhen-hua

    2012-01-01

    <正>In the nuclear fuel cycle, fissile materials are often dissolved in water. Criticality accidents are likely to happen in the uranium solution system and release a large amount of energy and radioactive materials. Therefore, the criticality safety of uranium solution system is very important in the nuclear safety technology research.

  9. CERN Alarms Data Management: State And Improvements

    CERN Document Server

    Zaharieva, Z

    2011-01-01

    The CERN Alarms System - LASER is a centralized service ensuring the capturing, storing and notification of anomalies for the whole accelerator chain, including the technical infrastructure at CERN. The underlying database holds the pre-defined configuration data for the alarm definitions, for the Operators alarms consoles as well as the time-stamped, run-time alarm events, propagated through the Alarms Systems. The article will discuss the current state of the Alarms database and recent improvements that have been introduced. It will look into the data management challenges related to the alarms configuration data that is taken from numerous sources. Specially developed Extract-Transform-Load (ETL) processes must be applied to this data in order to transform it into an appropriate format and load it into the Alarms database. The recorded alarms events together with some additional data, necessary for providing events statistics to users, are transferred to the long-term alarms archive.The article will cover...

  10. 核电厂数字化报警系统处理技术研究%Research on Digital Alarm System Processing Technology of Nuclear Power Plant

    Institute of Scientific and Technical Information of China (English)

    徐晓梅; 叶王平; 詹林钰

    2014-01-01

    针对现有核电厂主控制室报警系统所存在的典型人因问题,从数字化报警系统的报警信号流分析入手,提出合理实施报警信号处理和报警显示处理相关技术,并给出报警抑制、报警动态优先级管理及报警显示和控制集成解决方案,以减少报警系统人因问题。%Aiming at the existing typical human problems in main control room alarm system of nuclear power plant ,based on the digital alarm system alarm signal flow anal‐ysis ,a reasonable implementation of the alarm signal processing and alarm display pro‐cessing related technologies was put forward .And alarm suppression ,alarm dynamics priority management and alarm presentation and control integration solutions to reduce alarm system human factor issues were given .

  11. Alarm management a comprehensive guide

    CERN Document Server

    Hollifield, Bill R

    2011-01-01

    In this second edition, Alarm Management: A Comprehensive Guide, various problems of alarm systems are covered with precise guidance on how they come about and how to effectively correct them. It is written by individuals with vast experience in the different plants, processes, and environments requiring effective alarm management. The second edition is filled with good examples and explanations of procedures, with practical lists and tips on how one should proceed. It is based on hundreds of successful projects.

  12. MELCOR Accident Consequence Code System (MACCS)

    Energy Technology Data Exchange (ETDEWEB)

    Chanin, D.I. (Technadyne Engineering Consultants, Inc., Albuquerque, NM (USA)); Sprung, J.L.; Ritchie, L.T.; Jow, Hong-Nian (Sandia National Labs., Albuquerque, NM (USA))

    1990-02-01

    This report describes the MACCS computer code. The purpose of this code is to simulate the impact of severe accidents at nuclear power plants on the surrounding environment. MACCS has been developed for the US Nuclear Regulatory Commission to replace the previous CRAC2 code, and it incorporates many improvements in modeling flexibility in comparison to CRAC2. The principal phenomena considered in MACCS are atmospheric transport, mitigative actions based on dose projection, dose accumulation by a number of pathways including food and water ingestion, early and latent health effects, and economic costs. The MACCS code can be used for a variety of applications. These include (1) probabilistic risk assessment (PRA) of nuclear power plants and other nuclear facilities, (2) sensitivity studies to gain a better understanding of the parameters important to PRA, and (3) cost-benefit analysis. This report is composed of three volumes. This document, Volume 1, the Users's Guide, describes the input data requirements of the MACCS code and provides directions for its use as illustrated by three sample problems.

  13. MELCOR Accident Consequence Code System (MACCS)

    Energy Technology Data Exchange (ETDEWEB)

    Rollstin, J.A. (GRAM, Inc., Albuquerque, NM (USA)); Chanin, D.I. (Technadyne Engineering Consultants, Inc., Albuquerque, NM (USA)); Jow, H.N. (Sandia National Labs., Albuquerque, NM (USA))

    1990-02-01

    This report describes the MACCS computer code. The purpose of this code is to simulate the impact of severe accidents at nuclear power plants on the surrounding environment. MACCS has been developed for the US Nuclear Regulatory Commission to replace the previously used CRAC2 code, and it incorporates many improvements in modeling flexibility in comparison to CRAC2. The principal phenomena considered in MACCS are atmospheric transport, mitigative actions based on dose projections, dose accumulation by a number of pathways including food and water ingestion, early and latent health effects, and economic costs. The MACCS code can be used for a variety of applications. These include (1) probabilistic risk assessment (PRA) of nuclear power plants and other nuclear facilities, (2) sensitivity studies to gain a better understanding of the parameters important to PRA, and (3) cost-benefit analysis. This report is composed of three volumes. Volume I, the User's Guide, describes the input data requirements of the MACCS code and provides directions for its use as illustrated by three sample problems. Volume II, the Model Description, describes the underlying models that are implemented in the code, and Volume III, the Programmer's Reference Manual, describes the code's structure and database management.

  14. MELCOR Accident Consequence Code System (MACCS)

    Energy Technology Data Exchange (ETDEWEB)

    Jow, H.N.; Sprung, J.L.; Ritchie, L.T. (Sandia National Labs., Albuquerque, NM (USA)); Rollstin, J.A. (GRAM, Inc., Albuquerque, NM (USA)); Chanin, D.I. (Technadyne Engineering Consultants, Inc., Albuquerque, NM (USA))

    1990-02-01

    This report describes the MACCS computer code. The purpose of this code is to simulate the impact of severe accidents at nuclear power plants on the surrounding environment. MACCS has been developed for the US Nuclear Regulatory Commission to replace the previously used CRAC2 code, and it incorporates many improvements in modeling flexibility in comparison to CRAC2. The principal phenomena considered in MACCS are atmospheric transport, mitigative actions based on dose projection, dose accumulation by a number of pathways including food and water ingestion, early and latent health effects, and economic costs. The MACCS code can be used for a variety of applications. These include (1) probabilistic risk assessment (PRA) of nuclear power plants and other nuclear facilities, (2) sensitivity studies to gain a better understanding of the parameters important to PRA, and (3) cost-benefit analysis. This report is composed of three volumes. Volume I, the User's Guide, describes the input data requirements of the MACCS code and provides directions for its use as illustrated by three sample problems. Volume II, the Model Description, describes the underlying models that are implemented in the code, and Volume III, the Programmer's Reference Manual, describes the code's structure and database management. 59 refs., 14 figs., 15 tabs.

  15. 低压故障停电报警系统%Low Pressure Fault Outage Alarm System

    Institute of Scientific and Technical Information of China (English)

    熊俊锋; 丁月明

    2013-01-01

      供电可靠性要求越来越高,对低压配电线路的供电情况一直缺乏监测,不能随时掌握台变的运行情况,如果台变发生跳闸事故,只能通过用户打电话通知电力部门,经常出现停电后不能得到即时地处理,给用户带来工作、生活的不便,长时间的停电也会带来很大的经济损失。分析发生故障停电后报修不及时的原因和对策,研制了一套低压停电故障报警监测系统,在台变跳闸停电后能够通知电力抢修部门,使故障停电报修的时间尽可能的缩短,有效的减少了故障停电时间,提高了供电可靠性,同时有效地提高了供电企业的优质服务水平。%There is higher demand for supply reliability. There is not enough monitoring of the supply of low-voltage distribution lines, and so we can not keep up operation of bench transformer. If the bench transformer occurs tripping accident, we can notify the power sector only through user's call. If the blackouts are often and can not be immediately treated, it will bring inconveniences to the work and living of the user, and also will bring great economic losses. This paper analyzed the causes and countermeasures for not timely repair to failure blackout, developed a set of low-voltage power failure alarm monitoring system which can send the tripping blackout to electrical repair department, reduce the repair time and effectively reduce the fault outage time, improve the reliability of power supply, at the same time improve the level of quality service of power supply enterprise.

  16. Transformation of ground vibration signal for debris-flow monitoring and detection in alarm systems.

    Science.gov (United States)

    Abancó, Clàudia; Hürlimann, Marcel; Fritschi, Bruno; Graf, Christoph; Moya, José

    2012-01-01

    Debris flows are fast mass movements formed by a mix of water and solid materials, which occur in steep torrents, and are a source of high risks for human settlements. Geophones are widely used to detect the ground vibration induced by passing debris flows. However, the recording of geophone signals usually requires storing a huge amount of data, which leads to problems in storage capacity and power consumption. This paper presents a method to transform and simplify the signals measured by geophones. The key input parameter is the ground velocity threshold, which removes the seismic noise that is not related to debris flows. A signal conditioner was developed to implement the transformation and the ground velocity threshold was set by electrical resistors. The signal conditioner was installed at various European monitoring sites to test the method. Results show that data amount and power consumption can be greatly reduced without losing much information on the main features of the debris flows. However, the outcome stresses the importance of choosing a ground vibration threshold, which must be accurately calibrated. The transformation is also suitable to detect other rapid mass movements and to distinguish among different processes, which points to a possible implementation in alarm systems.

  17. Transformation of Ground Vibration Signal for Debris-Flow Monitoring and Detection in Alarm Systems

    Directory of Open Access Journals (Sweden)

    José Moya

    2012-04-01

    Full Text Available Debris flows are fast mass movements formed by a mix of water and solid materials, which occur in steep torrents, and are a source of high risks for human settlements. Geophones are widely used to detect the ground vibration induced by passing debris flows. However, the recording of geophone signals usually requires storing a huge amount of data, which leads to problems in storage capacity and power consumption. This paper presents a method to transform and simplify the signals measured by geophones. The key input parameter is the ground velocity threshold, which removes the seismic noise that is not related to debris flows. A signal conditioner was developed to implement the transformation and the ground velocity threshold was set by electrical resistors. The signal conditioner was installed at various European monitoring sites to test the method. Results show that data amount and power consumption can be greatly reduced without losing much information on the main features of the debris flows. However, the outcome stresses the importance of choosing a ground vibration threshold, which must be accurately calibrated. The transformation is also suitable to detect other rapid mass movements and to distinguish among different processes, which points to a possible implementation in alarm systems.

  18. Evaluation of severe accident risks: Quantification of major input parameters: MAACS (MELCOR Accident Consequence Code System) input

    Energy Technology Data Exchange (ETDEWEB)

    Sprung, J.L.; Jow, H-N (Sandia National Labs., Albuquerque, NM (USA)); Rollstin, J.A. (GRAM, Inc., Albuquerque, NM (USA)); Helton, J.C. (Arizona State Univ., Tempe, AZ (USA))

    1990-12-01

    Estimation of offsite accident consequences is the customary final step in a probabilistic assessment of the risks of severe nuclear reactor accidents. Recently, the Nuclear Regulatory Commission reassessed the risks of severe accidents at five US power reactors (NUREG-1150). Offsite accident consequences for NUREG-1150 source terms were estimated using the MELCOR Accident Consequence Code System (MACCS). Before these calculations were performed, most MACCS input parameters were reviewed, and for each parameter reviewed, a best-estimate value was recommended. This report presents the results of these reviews. Specifically, recommended values and the basis for their selection are presented for MACCS atmospheric and biospheric transport, emergency response, food pathway, and economic input parameters. Dose conversion factors and health effect parameters are not reviewed in this report. 134 refs., 15 figs., 110 tabs.

  19. The Design and Application of Detection and Alarm System of Combustible and Toxic Gas%浅析可燃和有毒有害气体检测报警系统的设计及应用

    Institute of Scientific and Technical Information of China (English)

    刘明鑫; 梁杰灿

    2016-01-01

    Ln order to avoid safety accident caused by flammable and toxic gas,In petrochemical plant and coal chemical industry, The combustible and toxic gas alarm control system shall be set. This paper simply introduces the updates and changes of the standard specification, and analyzes the combustible toxic gas detection alarm system.Finally professional and national code and the application with the combustible and toxic gas detection alarm system in the PP plant are introduced.%在石油化工及煤化工等行业的生产装置中,为了避免因可燃和有毒有害气体引起的安全生产事故发生,设置可燃和有毒有害气体检测报警系统。本文简单介绍了标准规范更新和变化,浅述可燃和有毒有害气体检测报警系统主要结构,最后介绍了可燃和有毒有害气体检测报警系统在聚丙烯装置中的应用。

  20. The Nevada railroad system: Physical, operational, and accident characteristics

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1991-09-01

    This report provides a description of the operational and physical characteristics of the Nevada railroad system. To understand the dynamics of the rail system, one must consider the system`s physical characteristics, routing, uses, interactions with other systems, and unique operational characteristics, if any. This report is presented in two parts. The first part is a narrative description of all mainlines and major branchlines of the Nevada railroad system. Each Nevada rail route is described, including the route`s physical characteristics, traffic type and volume, track conditions, and history. The second part of this study provides a more detailed analysis of Nevada railroad accident characteristics than was presented in the Preliminary Nevada Transportation Accident Characterization Study (DOE, 1990).

  1. A System Supporting the Analysis of Motorway Traffic Accidents

    Directory of Open Access Journals (Sweden)

    Davide Anghinolfi

    2015-12-01

    Full Text Available This work presents a business intelligence tool for monitoring traffic accidents on motorways and supporting decisions relevant to road safety. The system manages information on road characteristics, traffic accidents and traffic volumes and produces reports for monitoring the evolution of key performance indicators for road safety, supporting decisions on actions for risk mitigation and safety improvements for road users. The paper illustrates the different types of analyses performed by the system. Pattern based analysis is used to evaluate safety performance indicators for the road sections matching defined patterns. Two different road segmentation algorithms, used to identify the most critical road sections according to various severity indicators, are presented and discussed. Differential analysis compares the value of selected severity indicators before and after the implementation of an intervention on a road. Finally, a graphical user interface allows the accident locations to be visualized and accidents with specific characteristics to be highlighted. The system was evaluated on the data collected between 2009 and 2011 for the A15 motorway in Italy, connecting Parma to La Spezia.

  2. Development of Integrated Evaluation System for Severe Accident Management

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Dong Ha; Kim, K. R.; Park, S. H.; Park, S. Y.; Park, J. H.; Song, Y. M.; Ahn, K. I.; Choi, Y

    2007-06-15

    The objective of the project is twofold. One is to develop a severe accident database (DB) for the Korean Standard Nuclear Power plant (OPR-1000) and a DB management system, and the other to develop a localized computer code, MIDAS (Multi-purpose IntegrateD Assessment code for Severe accidents). The MELCOR DB has been constructed for the typical representative sequences to support the previous MAAP DB in the previous phase. The MAAP DB has been updated using the recent version of MAAP 4.0.6. The DB management system, SARD, has been upgraded to manage the MELCOR DB in addition to the MAAP DB and the network environment has been constructed for many users to access the SARD simultaneously. The integrated MIDAS 1.0 has been validated after completion of package-wise validation. As the current version of MIDAS cannot simulate the anticipated transient without scram (ATWS) sequence, point-kinetics model has been implemented. Also the gap cooling phenomena after corium relocation into the RPV can be modeled by the user as an input parameter. In addition, the subsystems of the severe accident graphic simulator are complemented for the efficient severe accident management and the engine of the graphic simulator was replaced by the MIDAS instead of the MELCOR code. For the user's convenience, MIDAS input and output processors are upgraded by enhancing the interfacial programs.

  3. Development of a system of computer codes for severe accident analyses and its applications

    Energy Technology Data Exchange (ETDEWEB)

    Chang, Soon Hong; Cheon, Moon Heon; Cho, Nam jin; No, Hui Cheon; Chang, Hyeon Seop; Moon, Sang Kee; Park, Seok Jeong; Chung, Jee Hwan [Korea Advanced Institute of Science and Technology, Taejon (Korea, Republic of)

    1991-12-15

    The objectives of this study is to develop a system of computer codes for postulated severe accident analyses in Nuclear Power Plants. This system of codes is necessary to conduct individual plant examination for domestic nuclear power plants. As a result of this study, one can conduct severe accident assessments more easily, and can extract the plant-specific vulnerabilities for severe accidents and at the same time the ideas for enhancing overall accident resistance. The scope and contents of this study are as follows : development of a system of computer codes for severe accident analyses, development of severe accident management strategy.

  4. Fundamental Principles of Alarm Design

    DEFF Research Database (Denmark)

    Us, Tolga; Jensen, Niels; Lind, Morten

    2011-01-01

    Traditionally alarms are designed on the basis of empirical guidelines rather than on a sound scientific framework rooted in a theoretical foundation for process and control system design. This paper proposes scientific principles and a methodology for design of alarms based on a functional...

  5. WIRELESS ACCIDENT INFORMATION SYSTEM USING GSM AND GPS

    Directory of Open Access Journals (Sweden)

    R.RATHINAKUMAR

    2012-09-01

    Full Text Available This paper discusses about designing a Smart Display and Control [SDC] which will monitor the zone and maintains the specified speed in the zone levels, which runs on an embedded system. This system includes three modules; automatic speed control module, accident detection and information sending module and security enabling module. Automatic speed control module includes RF transmitter placed in specific location and RF receiver in the vehicle. Accident detection module includes GSM and GPS technology. Security enabling module includes sensory units which ensures the condition of seat belt and the driver. This module includes alcohol sensor and eye sensor. The smart display and control is composed of two separate units: Zone status Transmitter unit and Receiver (speed Display and Control Unit.

  6. Emergency Response System for Pollution Accidents in Chemical Industrial Parks, China.

    Science.gov (United States)

    Duan, Weili; He, Bin

    2015-07-10

    In addition to property damage and loss of lives, environment pollution, such as water pollution and air pollution caused by accidents in chemical industrial parks (CIPs) is a significant issue in China. An emergency response system (ERS) was therefore planned to properly and proactively cope with safety incidents including fire and explosions occurring in the CIPs in this study. Using a scenario analysis, the stages of emergency response were divided into three levels, after introducing the domino effect, and fundamental requirements of ERS design were confirmed. The framework of ERS was composed mainly of a monitoring system, an emergency command center, an action system, and a supporting system. On this basis, six main emergency rescue steps containing alarm receipt, emergency evaluation, launched corresponding emergency plans, emergency rescue actions, emergency recovery, and result evaluation and feedback were determined. Finally, an example from the XiaoHu Chemical Industrial Park (XHCIP) was presented to check on the integrality, reliability, and maneuverability of the ERS, and the result of the first emergency drill with this ERS indicated that the developed ERS can reduce delays, improve usage efficiency of resources, and raise emergency rescue efficiency.

  7. Emergency Response System for Pollution Accidents in Chemical Industrial Parks, China

    Directory of Open Access Journals (Sweden)

    Weili Duan

    2015-07-01

    Full Text Available In addition to property damage and loss of lives, environment pollution, such as water pollution and air pollution caused by accidents in chemical industrial parks (CIPs is a significant issue in China. An emergency response system (ERS was therefore planned to properly and proactively cope with safety incidents including fire and explosions occurring in the CIPs in this study. Using a scenario analysis, the stages of emergency response were divided into three levels, after introducing the domino effect, and fundamental requirements of ERS design were confirmed. The framework of ERS was composed mainly of a monitoring system, an emergency command center, an action system, and a supporting system. On this basis, six main emergency rescue steps containing alarm receipt, emergency evaluation, launched corresponding emergency plans, emergency rescue actions, emergency recovery, and result evaluation and feedback were determined. Finally, an example from the XiaoHu Chemical Industrial Park (XHCIP was presented to check on the integrality, reliability, and maneuverability of the ERS, and the result of the first emergency drill with this ERS indicated that the developed ERS can reduce delays, improve usage efficiency of resources, and raise emergency rescue efficiency.

  8. An application of probabilistic safety assessment methods to model aircraft systems and accidents

    Energy Technology Data Exchange (ETDEWEB)

    Martinez-Guridi, G.; Hall, R.E.; Fullwood, R.R.

    1998-08-01

    A case study modeling the thrust reverser system (TRS) in the context of the fatal accident of a Boeing 767 is presented to illustrate the application of Probabilistic Safety Assessment methods. A simplified risk model consisting of an event tree with supporting fault trees was developed to represent the progression of the accident, taking into account the interaction between the TRS and the operating crew during the accident, and the findings of the accident investigation. A feasible sequence of events leading to the fatal accident was identified. Several insights about the TRS and the accident were obtained by applying PSA methods. Changes proposed for the TRS also are discussed.

  9. Enhanced Accident Tolerant Fuels for LWRS - A Preliminary Systems Analysis

    Energy Technology Data Exchange (ETDEWEB)

    Gilles Youinou; R. Sonat Sen

    2013-09-01

    The severe accident at Fukushima Daiichi nuclear plants illustrates the need for continuous improvements through developing and implementing technologies that contribute to safe, reliable and cost-effective operation of the nuclear fleet. Development of enhanced accident tolerant fuel contributes to this effort. These fuels, in comparison with the standard zircaloy – UO2 system currently used by the LWR industry, should be designed such that they tolerate loss of active cooling in the core for a longer time period (depending on the LWR system and accident scenario) while maintaining or improving the fuel performance during normal operations, operational transients, and design-basis events. This report presents a preliminary systems analysis related to most of these concepts. The potential impacts of these innovative LWR fuels on the front-end of the fuel cycle, on the reactor operation and on the back-end of the fuel cycle are succinctly described without having the pretension of being exhaustive. Since the design of these various concepts is still a work in progress, this analysis can only be preliminary and could be updated as the designs converge on their respective final version.

  10. EDUCATIONAL USE OF CLOUD COMPUTING AND AT-MEGA MICROCONTROLLER - A CASE STUDY OF AN ALARM SYSTEM

    Directory of Open Access Journals (Sweden)

    Tomasz Cieplak

    2016-06-01

    Full Text Available The article shows a case study of Cloud Computing model combined with AT-Mega microcontrollers for educational purposes. The presented system takes advantage of many aspects of Internet of Things model, thus conjoining Cloud Management system with measurement-execution module based on Arduino platform. One benefit of this solution is a cost-effective way of showcasing machine and device integration with distinct cloud services. This article is based on practical experience with students' projects and an home alarm system with use of a Cloud Computing services will be described.

  11. Improvement of the following accident dose assessment system

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Enn Han; Han, Moon Hee; Suh, Kyung Suk; Hwang, Won Tae; Choi, Young Gil [Korea Advanced Institute of Science and Technology, Taejon (Korea, Republic of)

    1999-12-15

    The FADAS has been updates for calculating the real-time wind fields continuously at the nuclear sites in Korea. The system has been constructed to compute the wind fields using its own process for the dummy meteorological data, and dose not effect on the overall wind field module. If the radioactive materials are released into the atmosphere in real situation, the calculations of wind fields and exposure dose in the previous FADAS are performed in the case of the recognition of the above situation in the source term evaluation module. The current version of FADAS includes the program for evaluating the effect of the predicted accident and the assumed scenario together. The dose assessment module is separated into the real-time and the supposed accident respectively.

  12. Improvement of the following accident dose assessment system (II)

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Enn Han; Han, Moon Hee; Suh, Kyung Suk; Hwang, Won Tae; Choi, Young Gil [Korea Atomic Energy Research Institute, Taejeon (Korea)

    2000-12-01

    The FADAS and its database have been updates for calculating the real-time wind fields continuously at the nuclear sites in Korea. The system has been constructed to compute the wind fields using its own process for the dummy meteorological data, and does not effect on the overall wind field module. If the radioactive materials are released into the atmosphere in real situation, the calculations of wind fields and exposure dose in the previous FADAS are performed in the case of the recognition of the above situation in the source term evaluation module. The current version of FADAS includes the program for evaluating the effect of the predicted accident and the assumed scenario together. The dose assessment module is separated into the real-time and the supposed accident respectively. 7 refs., 8 figs., 6 tabs. (Author)

  13. Development of system of computer codes for severe accident analysis and its applications

    Energy Technology Data Exchange (ETDEWEB)

    Jang, H. S.; Jeon, M. H.; Cho, N. J. and others [Korea Advanced Institute of Science and Technology, Taejon (Korea, Republic of)

    1992-01-15

    The objectives of this study is to develop a system of computer codes for postulated severe accident analyses in nuclear power plants. This system of codes is necessary to conduct Individual Plant Examination for domestic nuclear power plants. As a result of this study, one can conduct severe accident assessments more easily, and can extract the plant-specific vulnerabilities for severe accidents and at the same time the ideas for enhancing overall accident-resistance. Severe accident can be mitigated by the proper accident management strategies. Some operator action for mitigation can lead to more disastrous result and thus uncertain severe accident phenomena must be well recognized. There must be further research for development of severe accident management strategies utilizing existing plant resources as well as new design concepts.

  14. K West Basin Integrated Water Treatment System (IWTS) E-F Annular Filter Vessel Accident Calculations

    Energy Technology Data Exchange (ETDEWEB)

    PIEPHO, M.G.

    2000-01-10

    Four bounding accidents postulated for the K West Basin integrated water treatment system are evaluated against applicable risk evaluation guidelines. The accidents are a spray leak during fuel retrieval, spray leak during backflushing a hydrogen explosion, and a fire breaching filter vessel and enclosure. Event trees and accident probabilities are estimated. In all cases, the unmitigated dose consequences are below the risk evaluation guidelines.

  15. K West Basin Integrated Water Treatment System (IWTS) E-F Annular Filter Vessel Accident Calculations

    Energy Technology Data Exchange (ETDEWEB)

    RITTMANN, P.D.

    1999-10-07

    Three bounding accidents postdated for the K West Basin integrated water treatment system are evaluated against applicable risk evaluation guidelines. The accidents are a spray leak during fuel retrieval, spray leak during backflushing, and a hydrogen explosion. Event trees and accident probabilities are estimated. In all cases, the unmitigated dose consequences are below the risk evaluation guidelines.

  16. Future Integrated Systems Concept for Preventing Aircraft Loss-of-Control Accidents

    Science.gov (United States)

    Belcastro, Christine M.; Jacobson, Steven r.

    2010-01-01

    Loss of control remains one of the largest contributors to aircraft fatal accidents worldwide. Aircraft loss-of-control accidents are highly complex in that they can result from numerous causal and contributing factors acting alone or (more often) in combination. Hence, there is no single intervention strategy to prevent these accidents. This paper presents future system concepts and research directions for preventing aircraft loss-of-control accidents.

  17. 30 CFR 77.311 - Alarm devices.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Alarm devices. 77.311 Section 77.311 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR COAL MINE SAFETY AND HEALTH MANDATORY....311 Alarm devices. Thermal dryer systems shall be equipped with both audible and visual alarm...

  18. An Accident Precursor Analysis Process Tailored for NASA Space Systems

    Science.gov (United States)

    Groen, Frank; Stamatelatos, Michael; Dezfuli, Homayoon; Maggio, Gaspare

    2010-01-01

    Accident Precursor Analysis (APA) serves as the bridge between existing risk modeling activities, which are often based on historical or generic failure statistics, and system anomalies, which provide crucial information about the failure mechanisms that are actually operative in the system and which may differ in frequency or type from those in the various models. These discrepancies between the models (perceived risk) and the system (actual risk) provide the leading indication of an underappreciated risk. This paper presents an APA process developed specifically for NASA Earth-to-Orbit space systems. The purpose of the process is to identify and characterize potential sources of system risk as evidenced by anomalous events which, although not necessarily presenting an immediate safety impact, may indicate that an unknown or insufficiently understood risk-significant condition exists in the system. Such anomalous events are considered accident precursors because they signal the potential for severe consequences that may occur in the future, due to causes that are discernible from their occurrence today. Their early identification allows them to be integrated into the overall system risk model used to intbrm decisions relating to safety.

  19. Investigation of air cleaning system response to accident conditions

    Energy Technology Data Exchange (ETDEWEB)

    Andrae, R.W.; Bolstad, J.W.; Foster, R.D.; Gregory, W.S.; Horak, H.L.; Idar, E.S.; Martin, R.A.; Ricketts, C.I.; Smith, P.R.; Tang, P.K.

    1980-01-01

    Air cleaning system response to the stress of accident conditions are being investigated. A program overview and hghlight recent results of our investigation are presented. The program includes both analytical and experimental investigations. Computer codes for predicting effects of tornados, explosions, fires, and material transport are described. The test facilities used to obtain supportive experimental data to define structural integrity and confinement effectiveness of ventilation system components are described. Examples of experimental results for code verification, blower response to tornado transients, and filter response to tornado and explosion transients are reported.

  20. Design of sluice voice alarm system based on AT89S52 and ISD1760%基于AT89S52和ISD1760的水闸语音报警系统设计

    Institute of Scientific and Technical Information of China (English)

    吴学中; 蔡明星; 吴学文

    2011-01-01

    为避免水闸附近渔船在水闸开闸放水时被上游的水冲走,设计出一种水闸语音报警系统.该系统基于单片机AT89S52和语音芯片ISD1760,在开闸前10分钟,通过系统的通信模块接收远程水闸控制中心发送的指令,判断指令的种类,给予相应的报警提示,同时控制水闸上方的报警指示灯闪亮,通知水闸附近的船只迅速撤离到安全水域.在巢湖市裕溪水闸实际应用中,该系统能够稳定地工作,有效地减少了水闸附近渔船发生危险的事故数,达到了避免不必要的伤亡和损失的要求.%In order to avoid the hazardous situation that when opening the sluice some fishing boats downstream would be washed away, this paper designed a kind of voice alarm system. This system is based on AT89S52 SCM and ISD1760, 10 minutes before opening the sluice, the system received alarm instructions through the control center of the remote sluice,determined the type of instructions, then played corresponding alarm prompts. At the same moment, the system controlled the alarm indicator light which was placed at the top of the sluice flashing so that fishing vessels near the sluice could evacuate to safer waters quickly. The application results using in Yu-xi sluice show that the alarm system can work reliably and stably, it effectively reduces the number of accidents of fishing vessels nearby the sluice, and meets the requirements of avoiding unnecessary casualties and losses.

  1. Role of Large Clinical Datasets From Physiologic Monitors in Improving the Safety of Clinical Alarm Systems and Methodological Considerations: A Case From Philips Monitors

    Science.gov (United States)

    Reed, Charles Calhoun; Staggers, Nancy

    2016-01-01

    Background Large datasets of the audit log of modern physiologic monitoring devices have rarely been used for predictive modeling, capturing unsafe practices, or guiding initiatives on alarm systems safety. Objective This paper (1) describes a large clinical dataset using the audit log of the physiologic monitors, (2) discusses benefits and challenges of using the audit log in identifying the most important alarm signals and improving the safety of clinical alarm systems, and (3) provides suggestions for presenting alarm data and improving the audit log of the physiologic monitors. Methods At a 20-bed transplant cardiac intensive care unit, alarm data recorded via the audit log of bedside monitors were retrieved from the server of the central station monitor. Results Benefits of the audit log are many. They include easily retrievable data at no cost, complete alarm records, easy capture of inconsistent and unsafe practices, and easy identification of bedside monitors missed from a unit change of alarm settings adjustments. Challenges in analyzing the audit log are related to the time-consuming processes of data cleaning and analysis, and limited storage and retrieval capabilities of the monitors. Conclusions The audit log is a function of current capabilities of the physiologic monitoring systems, monitor’s configuration, and alarm management practices by clinicians. Despite current challenges in data retrieval and analysis, large digitalized clinical datasets hold great promise in performance, safety, and quality improvement. Vendors, clinicians, researchers, and professional organizations should work closely to identify the most useful format and type of clinical data to expand medical devices’ log capacity. PMID:27694097

  2. A Modular Telerobot Control System for Accident Response

    Energy Technology Data Exchange (ETDEWEB)

    Anderson, Robert J.; Shirey, David L.

    1999-07-20

    The Accident Response Mobile Manipulator System (ARMMS) is a teleoperated emergency response vehicle that deploys two hydraulic manipulators, five cameras, and an array of sensors to the scene of an incident. It is operated from a remote base station that can be situated up to four kilometers away from the site. Recently, a modular telerobot control architecture called SMART (Sandia's Modular Architecture for Robotic and Teleoperation) was applied to ARMMS to improve the precision, safety, and operability of the manipulators on board. Using SMART, a prototype manipulator control system was developed in a couple of days, and an integrated working system was demonstrated within a couple of months. New capabilities such as camera teleoperation, autonomous tool changeout and dual manipulator control have been incorporated. The final system incorporates twenty-two separate modules and implements eight different behavior modes. This paper describes the integration of SMART into the ARMMS system.

  3. 基于RFID部队考勤报警系统%Attendance alarm system based on RFID for Army

    Institute of Scientific and Technical Information of China (English)

    袁浩; 樊同亮

    2016-01-01

    随着科技进步和部队现代化程度的大大提高,部队考勤系统越来越智能化。文章设计了基于无线射频识别技术的考勤报警系统,采用 STC89C52单片机作为主控器,由 RFID、红外和温度传感器以及 RTC 时钟管理芯片等组成。该系统能够实现记录考勤和对非法人员报警的功能,具有低损耗、高性能、高可靠性的优点。%With the rapid acceleration of the technology and the modernization of troops, it is more intelligent for the troop at-tendance system. In this paper, we design an attendance alarm system based on RFID, adopting the STC89C52 single-chip-microcomputer as master controller. It consists of RFID, infrared sensor, temperature sensor and RTC clock management chip. This system can achieve the function of record attendance and alarms to persons without permission. In addition, it also shows capacity on low loss, high performance and better reliability.

  4. Development of the severe accident risk information database management system SARD

    Energy Technology Data Exchange (ETDEWEB)

    Ahn, Kwang Il; Kim, Dong Ha

    2003-01-01

    The main purpose of this report is to introduce essential features and functions of a severe accident risk information management system, SARD (Severe Accident Risk Database Management System) version 1.0, which has been developed in Korea Atomic Energy Research Institute, and database management and data retrieval procedures through the system. The present database management system has powerful capabilities that can store automatically and manage systematically the plant-specific severe accident analysis results for core damage sequences leading to severe accidents, and search intelligently the related severe accident risk information. For that purpose, the present database system mainly takes into account the plant-specific severe accident sequences obtained from the Level 2 Probabilistic Safety Assessments (PSAs), base case analysis results for various severe accident sequences (such as code responses and summary for key-event timings), and related sensitivity analysis results for key input parameters/models employed in the severe accident codes. Accordingly, the present database system can be effectively applied in supporting the Level 2 PSA of similar plants, for fast prediction and intelligent retrieval of the required severe accident risk information for the specific plant whose information was previously stored in the database system, and development of plant-specific severe accident management strategies.

  5. 医用报警系统中视觉报警信号的测试方法%Test Methods of Visual Alarm Signal for Medical Alarm Systems

    Institute of Scientific and Technical Information of China (English)

    张赟; 孙益项

    2014-01-01

    介绍了几种可用于医用报警系统中视觉报警信号的测试方法,以进行YY 0709-2009的符合性验证,包括直接测量报警信号灯的供电脉冲、拍摄视频动画后进行图像分析和用光电传感器测量等,对几种方法的优劣进行了比较。重点提出了一种以硅光电池作为传感器、并在前端增加滤光片、在输出端增加放大电路、用示波器接收信号的方法,解决了液晶模拟闪烁信号的测试难点,能够适应各种医用电气设备的视觉报警信号测试。%This paper introduces several test methods of characteristics of alarm indicator lights which can be used in the medical alarm system to verify the compliance of YY 0709-2009. These methods include the direct measurement of the pulse current supply of the alarm signals, image analysing of a video and reception by photoelectric sensor. After the comparation of the advantages and disadvantages among these methods, this paper proposes a new method of signal reception. This method which used a silicon photocellas the sensor with light filter in its front, and amplified circuit in the output end then used an oscil ograph as the reviewer, has resolved the testing difficulties of the flashing signal simulating by LCD, and can be applied to test the alarm indicator lights in any medical electrical equipment.

  6. Developement of integrated evaluation system for severe accident management

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Dong Ha; Kim, H. D.; Park, S. Y.; Kim, K. R.; Park, S. H.; Choi, Y.; Song, Y. M.; Ahn, K. I.; Park, J. H

    2005-04-01

    The scope of the project includes four activities such as construction of DB, development of data base management tool, development of severe accident analysis code system and FP studies. In the construction of DB, level-1,2 PSA results and plant damage states event trees were mainly used to select the following target initiators based on frequencies: LLOCA, MLOCA, SLOCA, station black out, LOOP, LOFW and SGTR. These scenarios occupy more than 95% of the total frequencies of the core damage sequences at KSNP. In the development of data base management tool, SARD 2.0 was developed under the PC microsoft windows environment using the visual basic 6.0 language. In the development of severe accident analysis code system, MIDAS 1.0 was developed with new features of FORTRAN-90 which makes it possible to allocate the storage dynamically and to use the user-defined data type, leading to an efficient memory treatment and an easy understanding. Also for user's convenience, the input (IEDIT) and output (IPLOT) processors were developed and implemented into the MIDAS code. For the model development of MIDAS concerning the FP behavior, the one dimensional thermophoresis model was developed and it gave much improvement to predict the amount of FP deposited on the SG U-tube. Also the source term analysis methodology was set up and applied to the KSNP and APR1400.

  7. Development of ultrasonic high temperature system for severe accidents research

    Energy Technology Data Exchange (ETDEWEB)

    Koo, Kil Mo; Kang, Kyung Ho; Kim, Young Ro and others

    2000-07-01

    The aims of this study are to find a gap formation between corium melt and the reactor lower head vessel, to verify the principle of the gap formation and to analyze the effect of the gap formation on the thermal behavior of corium melt and the lower plenum. This report aims at suggesting development of a new high temperature measuring system using an ultrasonic method which overcomes the limitations of the present thermocouple method used for severe accident experiments. Also, this report describes the design and manufacturing method of the ultrasonic system. At that time, the sensor element is fabricated to a reflective element using 1mm diameter and 50 mm and 80 mm long tungsten alloy wires. This temperature measuring system is intended to measure up to 2800 deg C.

  8. A database system for the management of severe accident risk information, SARD

    Energy Technology Data Exchange (ETDEWEB)

    Ahn, K. I.; Kim, D. H. [KAERI, Taejon (Korea, Republic of)

    2003-10-01

    The purpose of this paper is to introduce main features and functions of a PC Windows-based database management system, SARD, which has been developed at Korea Atomic Energy Research Institute for automatic management and search of the severe accident risk information. Main functions of the present database system are implemented by three closely related, but distinctive modules: (1) fixing of an initial environment for data storage and retrieval, (2) automatic loading and management of accident information, and (3) automatic search and retrieval of accident information. For this, the present database system manipulates various form of the plant-specific severe accident risk information, such as dominant severe accident sequences identified from the plant-specific Level 2 Probabilistic Safety Assessment (PSA) and accident sequence-specific information obtained from the representative severe accident codes (e.g., base case and sensitivity analysis results, and summary for key plant responses). The present database system makes it possible to implement fast prediction and intelligent retrieval of the required severe accident risk information for various accident sequences, and in turn it can be used for the support of the Level 2 PSA of similar plants and for the development of plant-specific severe accident management strategies.

  9. Statistical Considerations in Designing Tests of Mine Detection Systems: II - Measures Related to the False Alarm Rate

    Energy Technology Data Exchange (ETDEWEB)

    Simonson, K.M.

    1998-08-01

    The rate at which a mine detection system falsely identifies man-made or natural clutter objects as mines is referred to as the system's false alarm rate (FAR). Generally expressed as a rate per unit area or time, the FAR is one of the primary metrics used to gauge system performance. In this report, an overview is given of statistical methods appropriate for the analysis of data relating to FAR. Techniques are presented for determining a suitable size for the clutter collection area, for summarizing the performance of a single sensor, and for comparing different sensors. For readers requiring more thorough coverage of the topics discussed, references to the statistical literature are provided. A companion report addresses statistical issues related to the estimation of mine detection probabilities.

  10. Application performance evaluation on automatic fire alarm system of metro%地铁火灾自动报警系统使用效能评价

    Institute of Scientific and Technical Information of China (English)

    宋立巍; 宋立丹; 赵海荣

    2009-01-01

    对地铁火灾自动报警系统使用效能评价进行了研究,提出了该系统使用效能的评价要求、评价指标体系、评价流程以及评分模型,为地铁火灾自动报警系统的使用效能评价工作提供了技术参考和指导.%Application performance evaluation on automatic fire alarm system in metro was studied. Requirements, evaluation index system, evaluation process and score model of application performance evaluation on automatic fire alarm system in metro were proposed. And it will provide technical reference and guidance on the application performance evaluation job on automatic fire alarm system in metro.

  11. Accidental knowledge: Using accidents and other project failures to inform research in systems engineering

    Science.gov (United States)

    Sorenson, Diane C.

    Projects experience cost overruns, late deliveries, quality issues, cancellation, and accidents despite the best efforts of the systems engineering community. There is relatively little research on why systems engineering failures in general happen, but a substantial body of work on accident causation. Here, we investigate whether systems failures in general exhibit the same patterns of causation as accidents. We conducted a review of existing accident models to develop a model that could be applied to all types of project failures. Our model helped us to classify where the factors occur during the system development/system operation phases and which entity was involved in each factor. We analyzed 58 failure case studies. The failure cases span non-accidents, accidents, and dual failures. The sources for each subset had varying depth and scope of investigation. We developed a coding method to compare the factors between failure cases that broke each factor down into an "actor-action-object" structure. We further generalized the actions from the "actor-action-object" strings into control flaws so that we could analyze the failure cases at a high level. We analyzed the control flaws, actions, and actors for each failure case and compared the results for accidents and non-accidents. Of our results that we could not attribute to study biases, we found similarities and differences between project failure causation. We also identified which control flaws, actions, and actors were the most prevalent in the different types of project failures. Of all the actions, "failure to consider factor in system development" contributed most to non-accidents, while "failure to consider step in risk management" contributed the most to accidents. Of all the actors, "company management" contributed the most to non-accidents and accidents.

  12. 46 CFR 169.732 - Carbon dioxide alarm.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Carbon dioxide alarm. 169.732 Section 169.732 Shipping... Control, Miscellaneous Systems, and Equipment Markings § 169.732 Carbon dioxide alarm. Each carbon dioxide alarm must be conspicuously identified: “WHEN ALARM SOUNDS—VACATE AT ONCE. CARBON DIOXIDE BEING RELEASED.”...

  13. Design of Pyroelectric Infrared Alarm System%热释电红外报警系统设计

    Institute of Scientific and Technical Information of China (English)

    尚小燕; 姜旭; 武继安

    2012-01-01

    Based on the working principle of pyroelectric infrared sensor,the passive pyroelectric infrared alarm system is designed for safety of residence house to detect whether outsiders enter or not.This system was made of pyroelectric infrared sensor,Fresnel lens and monitoring circuits.Infrared signal processor BISS0001 was chosen,amplifying and filtering circuits and infrared signal processing circuit were designed on basis of the concealment of infrared,then the voice chip was utilized to simulate alarm voice for warning thieves and burglars.After many experiments,it represented that the system has sensitive response,high anti-interference ability and safe and reliable performance.%基于热释电红外传感器的工作原理,设计了一种被动式热释电红外报警器。主要用于家居安全,探测有无外人闯入。该系统由热释电红外传感器、菲涅尔透镜和监控电路组成。系统把红外线的隐蔽性很好地应用于电路中,选用了新一代红外信号处理器BISS0001,设计了放大滤波电路,红外信号处理电路,并加入语音芯片,模拟警笛声音,达到防盗目的。经多次实验,该系统反应灵敏,抗干扰能力强,安全可靠。

  14. Submerged demineralize system processing of TMI-2 accident waste water

    Energy Technology Data Exchange (ETDEWEB)

    Sanchez, H.F.; Quinn, G.J.

    1983-02-01

    Accident-generated radioactive waste at Three Mile Island Unit 2 includes a varity of high and low specific-activity waste. The high-specific-activity waste, particularly over one million gallons of contaminated water, required special processing and secondary waste handling. General public utilities and its contractors developed a zeolite-based ion-exchange system called the Submerged Demineralizer System to reduce contamination levels in the water to below allowable limits. Testing and modifications resulted in an operating system that had successfully processed waste water from the Reactor Coolant Bleed Tanks, the Reactor Building Basement, and the Reactor Coolant System as of August 1982. System design objectives were met and decontamination criteria established in 10 CFR 20 were attained. Additional wastes that could not be handled routinely were generated by another water-processing system, called EPICOR II. EPICOR II wastes are discussed. Low-specific-activity (LSA) wastes such as trash and resin-bed waste canisters are also included in handling. LSA wastes are routinely handled and shipped according to existing industry practice. Plant records are summarized to provide approximate yearly volumes and curie loadings of low-specific-activity wastes being shipped off the Island to a commercial burial site.

  15. Auto-alarm system based on telephone network%基于电话网络的自动报警系统

    Institute of Scientific and Technical Information of China (English)

    汪慧英; 王玉; 谢春

    2009-01-01

    A design of auto-alarm system based on telephone network is presented. Using the existed telephone network, the auto-alarm system transmits the alarm signal through telephone line, sends and receives the alarm information by double tone multi frequency (DTMF) dialing. This auto-alarm system is applied for fireproofing, guarding the theft as well as first aid for the alone elder and handicapped in uptown. Intelligent offices and Hotels can also use this auto-alarm system instead of establishing special network.%介绍了一种基于电话网络的自动报警系统的软硬件设计.本系统在充分利用现有的程控电话网络或内部小型交换机网络的基础上,以电话线为载体实现报警信号的传输,通过拨号实现报警信息的发送与接收,易于安装维护.本自动报警系统可应用于住宅小区,中小企业的防火、防盗报警、缺少照料的老弱病残的急救报警等,也可应用到企业管理、智能大厦管理、酒店等本需建立专用网络的环境中,利用已有的内部电话网络,极大程度上降低报警系统成本.

  16. Midair collisions - The accidents, the systems, and the Realpolitik

    Science.gov (United States)

    Wiener, E. L.

    1980-01-01

    Two midair collisions occurring in 1978 are described, and the air traffic control system and procedures in use at the time, human factors implications and political consequences of the accidents are examined. The first collision occurred in Memphis and involved a Falcon jet and a Cessna 150 in a situation in which the controllers handling each aircraft were not aware of the presence of the other aircraft until it was too late. The second occurred in San Diego four months later, when a Boeing 727 on a visual approach struck a Cessna 172 from the rear. Following the San Diego collision there arose a great deal of investigative activity, resulting in suggestions for tighter control on visual flight rules aircraft and the expansion of positive control airspace. These issues then led to a political battle involving general aviation, the FAA and the Congress. It is argued, however, that the collisions were in fact system-induced errors resulting from an air traffic control system which emphasizes airspace allocation and politics rather than the various human factors problems facing pilots and controllers.

  17. GSM汽车报警系统的设计%Design of Car Anti-theft Alarming System Based on GSM

    Institute of Scientific and Technical Information of China (English)

    姚曼; 王银

    2011-01-01

    A car remote anti-theft alarming system was introduced in this paper.In this system AT89C52 single-chip microcomputer is used as the core to control the GSM communication module.The system components,working principle,hardware and software designing process have been described in detail.The alarm system is triggered by the sensor module,the SCM will send AT instructions which control TC35i to send alarming short messages to the owners as soon as possible.This system breaks the traditional alarm limits,and has a good prospect of market.%设计使用AT89C52单片机为核心,控制GSM通信模块实现了远距离汽车防盗报警系统,从系统组成、工作原理以及软硬件设计方面做了详细介绍。该系统通过传感器模块触发报警,通过单片机向TC35i输入AT指令使其能及时向车主发送短消息告警,打破了传统报警器的距离限制,具有很好的市场前景。

  18. Understanding Clinical Alarm Safety.

    Science.gov (United States)

    Lukasewicz, Carol L; Mattox, Elizabeth Andersson

    2015-08-01

    Patient safety organizations and health care accreditation agencies recognize the significance of clinical alarm hazards. The Association for the Advancement of Medical Instrumentation, a nonprofit organization focused on development and use of safe and effective medical equipment, identifies alarm management as a major issue for health care organizations. ECRI Institute, a nonprofit organization that researches approaches for improving patient safety and quality of care, identifies alarm hazards as the most significant of the "Top Ten Health Technology Hazards" for 2014. A new Joint Commission National Patient Safety Goal focusing on clinical alarm safety contains new requirements for accredited hospitals to be fully implemented by 2016. Through a fictional unfolding case study, this article reviews selected contributing factors to clinical alarm hazards present in inpatient, high-acuity settings. Understanding these factors improves contributions by nurses to clinical alarm safety practice.

  19. Sociological study on the course of the traffic system and the traffic accidents

    OpenAIRE

    Yaşar Erjem

    2007-01-01

    The subject of this research is the operation of the traffic system and traffic accidents from a sociological perspective. In the research , the traffic system is taken as a sub-system of the social system. In this context the effects of the social, cultural and demographic factors on traffic accidents are examined . The data were collected from 681 people of whom 300 are drivers 300 pedestrians, 4 directors and 20 instructors of driving courses in Konya in Turkey. The research findings showe...

  20. Simulation of Intelligent Fire Detection and Alarm System for a W d p .

    Directory of Open Access Journals (Sweden)

    V. B. Pati

    1989-01-01

    Full Text Available Fire is one of the major hazards in warships. A warship being avery complex structure, with sophisticated weapons, machinery, fueland ammunition is always at risk of fire. Restrictions on movement of ship's personnel and equipment requires automation in fire detectionand control systems. This paper describes the limitations of conventional fire detection systems, followed by the features of modern fire detection and alarnr (the so-called intelligent systems and thetypes of fire detectors used in fire detection systems. The experimentalset-up used for simulating a simple system having 24 sensors connecteato the micro computer via digital input card is explained in detail withthe limitations of the experimental set-up and improvements that canbe made by incorporating serial communication in a loop, using fibre optics data links. and intelligent loop/interface units.

  1. Analysis of Fukushima unit 2 accident considering the operating conditions of RCIC system

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Sung Il, E-mail: sikim@kaeri.re.kr; Park, Jong Hwa; Ha, Kwang Soon; Cho, Song-Won; Song, JinHo

    2016-03-15

    Highlights: • Fukushima unit 2 accident was analyzed using MELCOR 1.8.6. • RCIC operating conditions were assumed and best case was selected. • Effect of RCIC operating condition on accident scenario was found. - Abstract: A severe accident in Fukushima occurred on March 11, 2011 and units 1, 2 and 3 were damaged severely. A tsunami following an earthquake made the supply of electricity power stop, and the safety systems, which use AC or DC power in plants could not operate properly. It is supposed that the degree of core degradation of unit 2 is less serious than in the other plants, and it was estimated that the operation of reactor core isolation cooling (RCIC) system at the initial stage of the accident minimized the core damage through decay heat removal. Although the operating conditions of the RCIC system are not known clearly, it can be important to analyze the accident scenario of unit 2. In this study, best case of the Fukushima unit 2 accident was presented considering the operating conditions of the RCIC system. The effects of operating condition on core degradation and fission product release rate to environment were also examined. In addition, importance of torus room flooding level in the accident analysis was discussed. MELCOR 1.8.6 was used in this research, and the geometries of plant and operating conditions of safety system were obtained from TEPCO through OECD/NEA BSAF Project.

  2. Implementation guidance for industrial-level security systems using radio frequency alarm links

    Energy Technology Data Exchange (ETDEWEB)

    Swank, R.G.

    1996-07-12

    Spread spectrum (SS) RF transmission technologies have properties that make the transmitted signal difficult to intercept, interpret, and jam. The digital code used in the modulation process results in a signal that has high reception reliability and supports multiple use of frequency bands and selective addressing. These attributes and the relatively low installation cost of RF systems make SSRF technologies candidate for communications links in security systems used for industrial sites, remote locations, and where trenching or other disturbances of soil or structures may not be desirable or may be costly. This guide provides a description of such a system and presents implementation methods that may be of engineering benefit.

  3. Development of Highly Survivable Power and Communication System for NPP Instruments under Severe Accident

    Energy Technology Data Exchange (ETDEWEB)

    Yoo, Seung J.; Gu, Beom W.; Nguyen, Duy T.; Choi, Bo H.; Rim, Chun T. [KAIST, Daejeon (Korea, Republic of); Lee, So I. [KHNP CRI, Daejeon (Korea, Republic of)

    2014-10-15

    According to the detail report from the Fukushima nuclear accident, the failure of conventional instruments is mainly due to the following reasons. 1) Insufficient backup battery capacity after the station black out (SBO) 2) The malfunction or damage of instruments due to the extremely harsh ambient condition after the severe accident 3) The cut-off of power and communication cable due to the physical shocks of hydrogen explosion after the severe accident Since the current equipment qualification (EQ) for the NPP instruments is based on the design basis accident such as loss of coolant accident (LOCA), conventional instruments, which are examined under EQ condition, cannot guarantee their normal operation during the severe accident. A 7m-long-distance wireless power transfer and a radio frequency (RF) communication were introduced with conventional wired system to increase a redundancy. A heat isolation box and a harness are adopted to provide a protection from the expected physical shocks such as missiles and drastic increase of ambient temperature and pressure. A detail design principle of the highly survivable power and communication system, which has 4 sub-systems of a DCRS wireless power transfer, a Zigbee wireless communication, a GFRP harness, and a passive type router with a fly back regulator, has been presented in this paper. Each sub-system has been designed to have a robust operation characteristic regardless of the estimated physical shocks after the severe accident.

  4. 基于ATmega16的GSM家居安防报警器%GSM Home Alarm System based on ATmega16

    Institute of Scientific and Technical Information of China (English)

    卞建勇; 杨润丰; 杨洋; 朱彩莲

    2011-01-01

    The demand of home alarm systems, including remote control for fire alarm, theft alarm and home appliances, is growing increasingly. As mobile phone is a popular and portable communication tool for residents, an automatic SMS home alarm system based on GSM technology was designed, which offer a remote control service via mobile phone for fire, intruder alarm and home appliance. The host controller is a microcontroller (AVR ATmega16) connecting with an external GSM module. SMS operation with password request can set eight mobile phone numbers for authorized users and the alarm message in Chinese. Wireless communication interface is used for infrared and microwave sensors for fire and intruder monitoring. In addition, wireless controlled relay with two output ends for linkage power, video recording, etc. Finally, experimental results demonstrate the effectiveness of the home alarm system.%当前人们对家居防火、防盗以及对家用电器远程控制的需求日益提升,同时手机已经成为居民随身携带的通信工具,基于此设计了一种基于GSM模块的能够通过手机对家用电器进行远程控制的集火灾、入侵报警于一体的自动短信安防报警系统.该系统由AVR ATmega16单片机外接GSM模块作为控制主机,由短信带密码操作,可设定8组用户电话号码,可中文短信报警,带有红外微波双鉴防盗和火灾检测无线通信接口,有2路无线控制继电器输出端,可联动电源,录像等工作.最后经实测表明系统具有很好的检测效果.

  5. 46 CFR 130.450 - Machinery alarms.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Machinery alarms. 130.450 Section 130.450 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS VESSEL CONTROL, AND MISCELLANEOUS EQUIPMENT AND SYSTEMS Automation of Unattended Machinery Spaces § 130.450 Machinery alarms....

  6. Proposal for the award of an industrial services contract for maintenance of fire and gas detection and evacuation alarm systems

    CERN Document Server

    2001-01-01

    This document concerns the award of an Industrial Services contract for maintenance of fire and gas detection and evacuation alarm systems. Following a market survey carried out among 48 firms in fourteen Member States, a call for tenders (IT-2818/ST) was sent on 15 December 2000 to four firms and three consortia, each consisting of two firms, in five Member States. By the closing date, CERN had received tenders from one firm and three consortia in four Member States. The Finance Committee is invited to agree to the negotiation of a contract with the consortium SCHRACK SECONET (AT) - SOTEB (FR), the lowest bidder, for an initial period of three years from 1 October 2001 for an amount not exceeding 5 800 000 Swiss francs, not subject to revision. The contract will include options for two one-year extensions beyond the initial three-year period. The consortium has indicated the following distribution by country of the contract value covered by this adjudication proposal: AT-50%, FR-50%.

  7. ALARM STRATEGY AND COMPLEXITY: PREDICTIONS OF OPERATOR RESPONSE

    Energy Technology Data Exchange (ETDEWEB)

    Austin Ragsdale; Roger Lew; Brian Dyre; Ronald Boring; David Gertman

    2012-07-01

    Decision support for operators is not new, and much has been written regarding the potential usefulness of digital support systems and alarm filtering strategies. However, determining the appropriate characteristics of decision support tools is difficult, especially when alarms can vary in the manner which diagnostic information is formulated and displayed and when event scenario types are complex and numerous. When first reviewed, the advantages or disadvantages of a particular alarm approach may not be apparent to the designer or analyst. The present research focuses on the review of two particular alarm strategies, binary alarm type (BAT) and likelihood alarm type (LAT), and reviews their influence upon accuracy, bias, and trust for tasks performed at a computer workstation capable of replicating a series of control-room-like alarms. The findings are discussed in terms of the of the performance advantages of likelihood alarm technology and related research as an aid to the alarm design process.

  8. The Importance of E-Learning and GSM Alarm System in the Medical Engineering

    Directory of Open Access Journals (Sweden)

    Maria-Lavinia POPESCU

    2012-06-01

    Full Text Available The present social context is disturbed by questions, diversity, complexity, and the time and space parameters. Thus it is justifying the change of institution activity at news requirements which oblige and which sometimes are contradictory. That is why a special importance presents the adaptation capacity of entities to continuum improvement of their offers. Thus, the aim of this paper is to present new aspects which can increase the medical services quality. Much more, the paper represents an interdisciplinary approach because it presents the importance of integration of technical aspects with the learning system founded by technology, Internet and electronic materials, all integrated of medical engineering.

  9. Infusion Alarm System Baed on Transmittance%基于透射率变化的输液报警器

    Institute of Scientific and Technical Information of China (English)

    江叶; 钱俊

    2016-01-01

    介绍了一种光学输液报警器,其原理是基于透射率的变化,光电转换器将这一变化转化为电信号而发生报警。针对红外感应报警器的各个零部件做了技术和原理说明,并分析其市场前景。%This paper introduces an optical infusion alarm.The principle is based on the change of trans-mittance and photoelectric converter transformed the change into electrical signals and then alarm.This paper also introduces technology and principles for the various parts of the alarm,and illustrates its market pros-pects.

  10. Study on Mobile Object Positioning and Alarming System Based on the “Map World” in the Core Area of the Silk Road Economic Belt

    Science.gov (United States)

    Mu, Kai

    2017-02-01

    The established “Map World” on the National Geographic Information Public Service Platform offers free access to many geographic information in the Core Area of the Silk Road Economic Belt. Considering the special security situation and severe splittism and anti-splittism struggles in the Core Area of the Silk Road Economic Belt, a set of moving target positioning and alarming platform based on J2EE platform and B/S structure was designed and realized by combining the “Map World” data and global navigation satellite system. This platform solves various problems, such as effective combination of Global Navigation Satellite System (GNSS) and “Map World” resources, moving target alarming setting, inquiry of historical routes, system management, etc.

  11. Natural hazard impacts on transport systems: analyzing the data base of transport accidents in Russia

    Science.gov (United States)

    Petrova, Elena

    2015-04-01

    We consider a transport accident as any accident that occurs during transportation of people and goods. It comprises of accidents involving air, road, rail, water, and pipeline transport. With over 1.2 million people killed each year, road accidents are one of the world's leading causes of death; another 20-50 million people are injured each year on the world's roads while walking, cycling, or driving. Transport accidents of other types including air, rail, and water transport accidents are not as numerous as road crashes, but the relative risk of each accident is much higher because of the higher number of people killed and injured per accident. Pipeline ruptures cause large damages to the environment. That is why safety and security are of primary concern for any transport system. The transport system of the Russian Federation (RF) is one of the most extensive in the world. It includes 1,283,000 km of public roads, more than 600,000 km of airlines, more than 200,000 km of gas, oil, and product pipelines, 115,000 km of inland waterways, and 87,000 km of railways. The transport system, especially the transport infrastructure of the country is exposed to impacts of various natural hazards and weather extremes such as heavy rains, snowfalls, snowdrifts, floods, earthquakes, volcanic eruptions, landslides, snow avalanches, debris flows, rock falls, fog or icing roads, and other natural factors that additionally trigger many accidents. In June 2014, the Ministry of Transport of the RF has compiled a new version of the Transport Strategy of the RF up to 2030. Among of the key pillars of the Strategy are to increase the safety of the transport system and to reduce negative environmental impacts. Using the data base of technological accidents that was created by the author, the study investigates temporal variations and regional differences of the transport accidents' risk within the Russian federal regions and a contribution of natural factors to occurrences of different

  12. An effect of containment filtered venting system on scale of contamination under severe accident

    Energy Technology Data Exchange (ETDEWEB)

    Jeon, Ju young; Lee, Jai-ki [Hanyang Univ., Seoul (Korea, Republic of)

    2016-02-15

    Some countries are expected to expand the scope of the Emergency Planning Zone(EPZ) by the influence of Fukushima accident. However, if the equipment, which is able to mitigate the severe accident consequences, is installed, unnecessary costs for an expansion of emergency planning zone will be reduced. The International Nuclear Safety Advisory Group (INSAC) has suggested to mitigate severe accidents by installing The Filtered Containment Venting System (FCVS). The probabilistic assessment code MACCS2 was used to calculate the effective radiation dose with and without FCVS to determine the effective reduction by the installation of a FCVS.

  13. HOW TO MINIMIZE OCCUPATIONAL ACCIDENTS IN TURKEY: THE BONUS-MALUS SYSTEM

    Directory of Open Access Journals (Sweden)

    Bülent ALTUNKAYNAK

    2016-02-01

    Full Text Available This study suggests Bonus-Malus System (BMS to minimize the occupational accidents in Turkey. Having a 12-class structure with a specific premium ratio for each class considering the number of accidents, the suggested system depends on the principle that the premium ratios should vary according to the number of accidents occurring in a given business. To enter the system, all businesses start from class 6, with a premium ratio of 2%. For the calculation of premium ratios for each class, the expected value principle is used. It is observed by using Markov chains that the system reaches the steady state in 45 years’ time and the changes in the premium income of Social Security Institution (SSI according to the distribution of businesses according to accident in the 5th, 10th, 20th, and 45th years are investigated. As a result, it is seen that the premium income of SSI will, in the course of time, decrease with BMS. In return, it is predicted that business are likely to try to escape punishment and turn to reward and increase measures against occupational accidents with a decrease in the number of accidents.

  14. On the reliability of fire detection and alarm systems. Exploration and analysis of data from nuclear and non-nuclear installations

    Energy Technology Data Exchange (ETDEWEB)

    Nyyssoenen, T.; Rajakko, J.; Keski-Rahkonen, O. [VTT Building and Transport, Espoo (Finland)

    2005-01-01

    A literature review of reliability data of fire detection and alarm systems was made resulting to rough estimates of some failure frequencies. No theoretical or technical articles on the structure of reliability models of these installations were found. Inspection records of fire detection and alarm system installations by SPEK were studied, and transferred in electronic data base classifying observed failures in failure modes (59) and severity categories (3) guided by freely written records in the original data. The results of that work are presented without many comments in tabular form in this paper. A small sample of installations was collected, and number of components in them was counted to derive some distributions for determination of national populations of various components based on know total amount of installations. From NPPs (Loviisa, Olkiluoto and Barsebaeck) failure reports were analysed, and observed failures of fire detection and alarm systems were classified by severity and detection mode. They are presented here in tabular form for the original and new addressable systems. Populations were counted individually, but for all installations needed documents were not available. Therefore, presented failure frequencies are just first estimates, which will be refined later. (orig.)

  15. Classification Of Road Accidents From The Perspective Of Vehicle Safety Systems

    Directory of Open Access Journals (Sweden)

    Jirovský Václav

    2015-11-01

    Full Text Available Modern road accident investigation and database structures are focused on accident analysis and classification from the point of view of the accident itself. The presented article offers a new approach, which will describe the accident from the point of view of integrated safety vehicle systems. Seven main categories have been defined to specify the level of importance of automated system intervention. One of the proposed categories is a new approach to defining the collision probability of an ego-vehicle with another object. This approach focuses on determining a 2-D reaction space, which describes all possible positions of the vehicle or other moving object in the specified amount of time in the future. This is to be used for defining the probability of the vehicles interacting - when the intersection of two reaction spaces exists, an action has to be taken on the side of ego-vehicle. The currently used 1-D quantity of TTC (time-to-collision can be superseded by the new reaction space variable. Such new quantity, whose basic idea is described in the article, enables the option of counting not only with necessary braking time, but mitigation by changing direction is then easily feasible. Finally, transparent classification measures of a probable accident are proposed. Their application is highly effective not only during basic accident comparison, but also for an on-board safety system.

  16. Accidents - Chernobyl accident; Accidents - accident de Tchernobyl

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2004-07-01

    This file is devoted to the Chernobyl accident. It is divided in four parts. The first part concerns the accident itself and its technical management. The second part is relative to the radiation doses and the different contaminations. The third part reports the sanitary effects, the determinists ones and the stochastic ones. The fourth and last part relates the consequences for the other European countries with the case of France. Through the different parts a point is tackled with the measures taken after the accident by the other countries to manage an accident, the cooperation between the different countries and the groups of research and studies about the reactors safety, and also with the international medical cooperation, specially for the children, everything in relation with the Chernobyl accident. (N.C.)

  17. Performance of the CEDS Accident Dosimetry System at the 1995 Los Alamos National Laboratory Nuclear Accident Dosimetry Intercomparison

    Energy Technology Data Exchange (ETDEWEB)

    McMahan, K.L.; Schwanke, L.J.

    1996-12-01

    In July 1995, LANL hosted an accident dosimetry intercomparison. When all reactors on the Oak Ridge Reservation were idled in 1988, the Health Physics Research Reactor (HPRR), which had been used for 22 previous intercomparisons dating from 1965, was shut down for an indefinite period. The LANL group began characterization of two critical assemblies for dosimetry purposes. As a result, NAD-23 was conceived and 10 DOE facilities accepted invitations to participate in the intercomparison. This report is a summary of the performance of one of the participants, the Centralized External Dosimetry System (CEDS). The CEDS is a cooperative personnel dosimetry arrangement between three DOE sites in Oak Ridge, Tennessee. Many successes and failures are reported herein. Generally, the TL dosimeters performed poorly and always over-reported the delivered dose. The TLD processing procedures contain efforts that would lead to large biases in the reported absorbed dose, and omit several key steps in the TLD reading process. The supralinear behavior of lithium fluoride (LiF) has not been characterized for this particular dosimeter and application (i.e., in high-dose mixed neutron/gamma fields). The use of TLD materials may also be precluded given the limitations of the LiF material itself, the TLD reading system, and the upper dose level to which accident dosimetry systems are required to perform as set forth in DOE regulations. The indium foil results confirm the expected inability of that material to predict the magnitude of the wearer`s dose reliably, although it is quite suitable as a quick-sort material. Biological sample (hair) results were above the minimum detectable activity (MDA) for only one of the tests. Several questions as to the best methods for sample handling and processing remain.

  18. 46 CFR 169.730 - General alarm bell switch.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false General alarm bell switch. 169.730 Section 169.730... Vessel Control, Miscellaneous Systems, and Equipment Markings § 169.730 General alarm bell switch. On vessels of 100 gross tons and over there must be a general alarm bell switch in the pilothouse,...

  19. 46 CFR 130.460 - Placement of machinery alarms.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Placement of machinery alarms. 130.460 Section 130.460..., AND MISCELLANEOUS EQUIPMENT AND SYSTEMS Automation of Unattended Machinery Spaces § 130.460 Placement of machinery alarms. (a) Visible and audible alarms must be installed at the pilothouse to...

  20. GPON网管系统ONU端告警管理的设计%Design of ONU alarm management in GPON network management systems

    Institute of Scientific and Technical Information of China (English)

    张江鑫; 庞利杰

    2009-01-01

    文章首先介绍了千兆无源光网络(GPON)的网络管理系统的结构,然后分析了网管中子代理光网络单元(ONU)的功能,重点讨论了ONU在管理与控制过程中出现的告警情况,并对其进行了分类.在此基础上对告警管理的处理方案进行了设计,完成了ONU管理控制模块中启动失败(SUF)告警进程的设计.%This paper first introduces the structure of the network management system of GPON and then analyses the functions of the subagent ONUs in these systems,focusing on the classified alarms in the these units in the management and control processes.On this basis,it devises the solutions for the alarm management and completes the design of the SUF alarm process for ONU management control modules.

  1. Implementation of a new system of alarm-broadcasting and telephone communication for mines; Wdrozenie nowego systemu lacznosci alarmowo-rozgloszeniowej i telefonicznej do gornictwa

    Energy Technology Data Exchange (ETDEWEB)

    Francik, J.; Paczynski, W. [Centrum Elektryfikacji i Automatyzacji Gornictwa EMAG, Katowice (Poland)

    1995-05-01

    The article describes a modern system of alarm-broadcasting and telephone communication, which provides full integration of equipment and intrinsically-safe underground telecommunication network. Construction and functions of the systems type TEDAR and TEDAR-S are presented. Particular attention has been paid to the operational experience gained after implementation of the newest intrinsically-safe system type TEDAR as a unit of integrated mining communication and the intrinsically-safe local shaft communication system type TEDAR-S. (author). 3 figs.

  2. 基于GSM的汽车防盗报警器设计%Car alarm system design based on GSM

    Institute of Scientific and Technical Information of China (English)

    黄鹤松; 边洪宁; 刘华东; 董佩

    2011-01-01

    介绍了一种基于GSM的小型汽车防盗器.防盗器以STC 12LE5402AD芯片为主控制器,以SIM900B为GSM模块,通过检测汽车异常的启动信号,以给车主打电话的方式实现远程防盗功能.该防盗器体积小、成本低、无需安装、无噪音污染,易于推广.%This paper presents a small car alarm based on GSM. This alarm takes the STC12LE5402AD chip to be the main controller and the SIM900B to be the GSM module. It can call the owner of the car when detecting the lawless starting signal to realize the remote burglarproof functions.

  3. A Remote Health Care System Combining a Fall Down Alarm and Biomedical Signal Monitor System in an Android Smart-Phone

    Directory of Open Access Journals (Sweden)

    Ching-Sung Wang

    2013-10-01

    Full Text Available First aid and immediate help are very important following an accident. The earlier the detection and treatment is carried out, the better the prognosis and chance of recovery of the patients. It is even more important when considering the elderly. Once the elderly have an accident, they not only physically injure their body, but also impair their mental and social ability, and may develop severe sequela. In the last few years, the continuously developed Android cell phone has been applied to many fields. Despite the nature of the GPS positioning system that the mobile phone currently uses, most applications used are SMS and file transfers. However, these biomedical measurement signals, passing through a transferring interface and uploading to the mobile, result the little really successful cases with the remote health care feasibility. This research will develop an Android cell phone which combines the functionality of an ECG, pulsimeter, SpO2, and BAD (Body Activity Detector for real-time monitoring of the activity of a body. When an accident occurs, the signals go through Android smart phone, immediately notifying the remote ends and providing first time help.

  4. Multistation alarm system for eruptive activity based on the automatic classification of volcanic tremor: specifications and performance

    Science.gov (United States)

    Langer, Horst; Falsaperla, Susanna; Messina, Alfio; Spampinato, Salvatore

    2015-04-01

    With over fifty eruptive episodes (Strombolian activity, lava fountains, and lava flows) between 2006 and 2013, Mt Etna, Italy, underscored its role as the most active volcano in Europe. Seven paroxysmal lava fountains at the South East Crater occurred in 2007-2008 and 46 at the New South East Crater between 2011 and 2013. Month-lasting lava emissions affected the upper eastern flank of the volcano in 2006 and 2008-2009. On this background, effective monitoring and forecast of volcanic phenomena are a first order issue for their potential socio-economic impact in a densely populated region like the town of Catania and its surroundings. For example, explosive activity has often formed thick ash clouds with widespread tephra fall able to disrupt the air traffic, as well as to cause severe problems at infrastructures, such as highways and roads. For timely information on changes in the state of the volcano and possible onset of dangerous eruptive phenomena, the analysis of the continuous background seismic signal, the so-called volcanic tremor, turned out of paramount importance. Changes in the state of the volcano as well as in its eruptive style are usually concurrent with variations of the spectral characteristics (amplitude and frequency content) of tremor. The huge amount of digital data continuously acquired by INGV's broadband seismic stations every day makes a manual analysis difficult, and techniques of automatic classification of the tremor signal are therefore applied. The application of unsupervised classification techniques to the tremor data revealed significant changes well before the onset of the eruptive episodes. This evidence led to the development of specific software packages related to real-time processing of the tremor data. The operational characteristics of these tools - fail-safe, robustness with respect to noise and data outages, as well as computational efficiency - allowed the identification of criteria for automatic alarm flagging. The

  5. The system of emergency cards for primary actions in accident at radioactive material transport in Russia

    Energy Technology Data Exchange (ETDEWEB)

    Ananiev, V.V. [Div. of the Decommission of Nuclear and Radiation-Hazardous Object of the Federal Agency for Atomic Energy, Moscow (Russian Federation); Ermakov, S.V.; Ershov, V.N.; Stovbur, V.I. [FGUP ' ' Emergency Response Centre of Minatom of Russia' ' , St-Petersburg (Russian Federation); Shvedov, M.O. [Div. of Nuclear and Radiation Safety of the Federal Agency for Atomic Energy, Moscow (Russian Federation)

    2004-07-01

    In the paper are reviewed the current and new designed system of the emergency cards for consignments of radioactive materials in Russian Federation, within the framework of a uniform state system of warning and liquidation of consequences of extraordinary situations and functional subsystem of warning and liquidation of accident situations of Federal Agency for Atomic Energy.

  6. The use of Grey System Theory in predicting the road traffic accident in Fars province in Iran

    Directory of Open Access Journals (Sweden)

    Ali Mohammadi

    2011-10-01

    Full Text Available Traffic accidents have become a more and more important factor that restrict the development of economy and threaten the safety of human beings. Considering the complexity and uncertainty of the influencing factors on traffic accidents, traffic accident forecasting can be regarded as a grey system with unknown and known information, so be analyzed by grey system theory. Grey models require only a limited amount of data to estimate the behavior of unknown systems. In this paper, first, the original predicted values of road traffic accidents are separately obtained by the GM (1,1 model, the Verhulst model and the DGM(2,1 model. The results of these models on predicting road traffic accident show that the forecasting accuracy of the GM(1,1 is higher than the Verhulst model and the DGM(2,1 model. Then, the GM(1,1 model is applied to predict road traffic accident in Fars province.

  7. Possibility of the development of a Serbian protection system against chemical accidents

    Directory of Open Access Journals (Sweden)

    Dejan R. Inđić

    2012-10-01

    Full Text Available The paper presents a draft of a system model for responding in case of chemical accidents in accordance with the current legislation regarding the environment protection, the structure and elements of the existing response system in case of chemical accidents, other works dealing with the issue as well as the prospects planned by those responsible for the environmental protection. The paper discuss the possibilities of different institutions and agencies of the Republic of Serbia to engage in specialized methods of cooperation and protection against chemical hazards in accordance with Article X of the Convention on the Prohibition of Chemical Weapons.

  8. Smart alarms from medical devices in the OR and ICU.

    Science.gov (United States)

    Imhoff, Michael; Kuhls, Silvia; Gather, Ursula; Fried, Roland

    2009-03-01

    Alarms in medical devices are a matter of concern in critical and perioperative care. The high rate of false alarms is not only a nuisance for patients and caregivers, but can also compromise patient safety and effectiveness of care. The development of alarm systems has lagged behind the technological advances of medical devices over the last 20 years. From a clinical perspective, major improvements in alarm algorithms are urgently needed. This review gives an overview of the current clinical situation and the underlying problems, and discusses different methods from statistics and computational science and their potential for clinical application. Some examples of the application of new alarm algorithms to clinical data are presented.

  9. Developing a Minimum Data Set for an Information Management System to Study Traffic Accidents in Iran

    Science.gov (United States)

    Mohammadi, Ali; Ahmadi, Maryam; Gharagozlu, Alireza

    2016-01-01

    Background: Each year, around 1.2 million people die in the road traffic incidents. Reducing traffic accidents requires an exact understanding of the risk factors associated with traffic patterns and behaviors. Properly analyzing these factors calls for a comprehensive system for collecting and processing accident data. Objectives: The aim of this study was to develop a minimum data set (MDS) for an information management system to study traffic accidents in Iran. Materials and Methods: This descriptive, cross-sectional study was performed in 2014. Data were collected from the traffic police, trauma centers, medical emergency centers, and via the internet. The investigated resources for this study were forms, databases, and documents retrieved from the internet. Forms and databases were identical, and one sample of each was evaluated. The related internet-sourced data were evaluated in their entirety. Data were collected using three checklists. In order to arrive at a consensus about the data elements, the decision Delphi technique was applied using questionnaires. The content validity and reliability of the questionnaires were assessed by experts’ opinions and the test-retest method, respectively. Results: An (MDS) of a traffic accident information management system was assigned to three sections: a minimum data set for traffic police with six classes, including 118 data elements; a trauma center with five data classes, including 57 data elements; and a medical emergency center, with 11 classes, including 64 data elements. Conclusions: Planning for the prevention of traffic accidents requires standardized data. As the foundation for crash prevention efforts, existing standard data infrastructures present policymakers and government officials with a great opportunity to strengthen and integrate existing accident information systems to better track road traffic injuries and fatalities. PMID:27247791

  10. 基于超声波汽车倒车雷达预警系统设计%Design of Reversing Radar Alarming System Based on Ultrasonic Wave Sensor

    Institute of Scientific and Technical Information of China (English)

    高月华

    2011-01-01

    Aiming at the car accident caused by the bad " back-sight" , a reversing radar alarming system based on the ultrasonic wave sensor has been proposed in this paper. This system begins to work during the back-draft time, it uses the ultrasonic wave transmitted by an ultrasonic sensor to detect the obstacle information. The ultrasonic wave information is processed to the distances information and displayed by the microprocessor. When the distance is smaller than the determined safety range, the system will start to alert with sound. The system has the advantages of simple installing,strong anti-detonation ability. high accuracy of distance detection and working stahly. The hardwares and software of being composed of the system have been presented and the measurement error has also been analyzed.%针对汽车倒车时的"后视"不良引起的倒车事故,介绍了一种基于超声波的倒车雷达预警系统.该系统在汽车挂倒挡时开始工作,通过超声波传感器发送超声波检测障碍物信息,经微处理器处理成测距信息,并进行显示,当距离小到设定的安全范围时,自动启动语音报警,该系统安装简单,抗震能力强,测距准确且工作稳定可靠.该文给出了系统各部分的硬件及软件实现,并分析了误差产生的原因.

  11. Realization of Intelligent Alarm System for District Power Network%地区电网智能告警系统的实现

    Institute of Scientific and Technical Information of China (English)

    杨洪耕; 明娇; 代海波

    2011-01-01

    In order to let monitoring staff quickly grasp the key abnormal information, timely and accurately take the relevant measure, combing the function features of intelligent alarm system and making use of the object—oriented modular design methods and multi—threading technology, the design idea of intelligent alarm system with the characteristics of strong scalability and fast response is presented. Based on the information integration and classification, troubleshooting strategy is provided through the decision intelligence analysis,traffic light status indicator is provided by smart state analysis, accurate voice alarm is realized by the use of TTS. The proposed system has the information intelligence inquiry function with the application of LINQ technology.%为便于监控人员快速掌握系统运行情况并在异常情况下及时准确采取相关处理措施,结合智能告警系统的功能特点,采用面向对象的模块化设计方法及多线程技术,提出了具有可扩展性强、响应速度快等特点的告警系统智能化设计思想.在信息整合分类的基础上,决策智能分析提供了故障处理策略,智能状态分析给出了红绿灯状态指示,采用文语转换技术TTS(text-to-speech conversion technology)实现了精确的语音告警,应用LINQ(language integrated query)技术,使该系统具有信息智能查询功能.

  12. 1983 international intercomparison of nuclear accident dosimetry systems at Oak Ridge National Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Swaja, R.E.; Greene, R.T.; Sims, C.S.

    1985-04-01

    An international intercomparison of nuclear accident dosimetry systems was conducted during September 12-16, 1983, at Oak Ridge National Laboratory (ORNL) using the Health Physics Research Reactor operated in the pulse mode to simulate criticality accidents. This study marked the twentieth in a series of annual accident dosimetry intercomparisons conducted at ORNL. Participants from ten organizations attended this intercomparison and measured neutron and gamma doses at area monitoring stations and on phantoms for three different shield conditions. Results of this study indicate that foil activation techniques are the most popular and accurate method of determining accident-level neutron doses at area monitoring stations. For personnel monitoring, foil activation, blood sodium activation, and thermoluminescent (TL) methods are all capable of providing accurate dose estimates in a variety of radiation fields. All participants in this study used TLD's to determine gamma doses with very good results on the average. Chemical dosemeters were also shown to be capable of yielding accurate estimates of total neutron plus gamma doses in a variety of radiation fields. While 83% of all neutron measurements satisfied regulatory standards relative to reference values, only 39% of all gamma results satisfied corresponding guidelines for gamma measurements. These results indicate that continued improvement in accident dosimetry evaluation and measurement techniques is needed.

  13. Flammable Gas Alarm System Based on ADAM-6017%基于ADAM-6017的可燃气体报警系统

    Institute of Scientific and Technical Information of China (English)

    王卫华; 赵庆云; 靳建水; 赵继安; 韩国栋

    2012-01-01

    利用智能型以太网I/O ADAM-6017的特性,以分布式控制方式构建某化工厂碳酸酯类等可燃气体报警系统,给出了系统的硬件架构和软件流程及其组态方式.%Basing on Ethernet I/O ADAM-6017 and distributed control mode, the flammable gas alarm system for carbonates in a chemical plant was proposed, including its hardware and software configuration and programming process.

  14. Numerical system utilising a Monte Carlo calculation method for accurate dose assessment in radiation accidents.

    Science.gov (United States)

    Takahashi, F; Endo, A

    2007-01-01

    A system utilising radiation transport codes has been developed to derive accurate dose distributions in a human body for radiological accidents. A suitable model is quite essential for a numerical analysis. Therefore, two tools were developed to setup a 'problem-dependent' input file, defining a radiation source and an exposed person to simulate the radiation transport in an accident with the Monte Carlo calculation codes-MCNP and MCNPX. Necessary resources are defined by a dialogue method with a generally used personal computer for both the tools. The tools prepare human body and source models described in the input file format of the employed Monte Carlo codes. The tools were validated for dose assessment in comparison with a past criticality accident and a hypothesized exposure.

  15. 基于MFM和SDG的二回路系统报警分析研究%Alarm Analysis of Secondary Loop System Based on MFM and SDG Methods

    Institute of Scientific and Technical Information of China (English)

    杨宁; 陆古兵; 陈攀

    2014-01-01

    The multilevel flow model (MFM ) and the signed directed graph (SDG) were combined to analyze the alarm signals of the secondary loop system for nuclear power plant .The MFM was used to delaminate and describe nuclear power plant ,and the SDG was used to analyze the logicality of the facility sign in the MFM .Two kinds of faults in the secondary loop system in nuclear power plant were simulated and the alarm signals were analyzed .The simulation results show that the fault source can be identified exact-ly and the transmit route of the alarm signals can be described clearly ,w hich is helpful for operators to judge .%将多层流模型(M FM )和符号有向图(SDG )相结合,对核动力装置二回路系统的报警信号进行分析。利用M FM对核动力装置进行抽象、分层,运用SDG的理论对M FM 中的设备符号进行逻辑分析。对二回路系统的两种故障状态进行报警仿真分析,结果表明:两种方法的结合能准确地判断源故障,清晰显示报警信号传递路径,有助于操纵员进行判断。

  16. Design of a Remote Monitoring and Alarming System%一种远程监控报警系统的设计

    Institute of Scientific and Technical Information of China (English)

    余湧; 马娅婕; 彭攀来; 刘智旸

    2016-01-01

    With the open source hardware Raspberry Pi as the core of the monitoring and alarm system, combining with the WebCam camera, and using the mature GPRS technology, the remote automatic monitoring and alarming system which is suitable for home security and unattended areas is designed. The overall structure, functions and hardware composition, software structure and function modules as well as the communication mode among all the parts are introduced. In order to achieve the purpose of the remote monitoring and alarming, when obvious moving of the object is detected in monitoring graphics of camera, the image is captured automatically and sent by E-mail, and the image and video segment are saved;the alarm information is also sent to the user. From the tests, it is found that the system operates stably and reliably, it has certain applicable value.%以开源硬件Raspberry Pi作为监控与报警系统的核心,结合WebCam摄像头,运用成熟的GPRS技术,设计了一种适用于家庭安防和无人值守等领域的远程自动监控报警系统。介绍了系统的总体结构、功能,硬件组成、软件结构与功能模块,以及各部分之间的通信方式。当系统侦测到摄像头监控画面中有物体发生明显移动时,将自动捕捉并以电子邮件的形式发出物体运动图像,同时保存图像和视频片段并向用户发送报警信息,从而实现远程监控报警。经过测试运行,系统能够正常、稳定地工作,可靠性较高,具有一定的使用价值。

  17. Analysis of Moderator System Failure Accidents by Using New Method for Wolsong-1 CANDU 6 Reactor

    Energy Technology Data Exchange (ETDEWEB)

    Jin, Dongsik; Kim, Jonghyun; Cho, Cheonhwey [Atomic Creative Technology Co., Ltd., Daejeon (Korea, Republic of); Kim, Sungmin [Korea Hydro and Nuclear Power Co., Ltd., Daejeon (Korea, Republic of)

    2013-05-15

    To reconfirm the safety of moderator system failure accidents, the safety analysis by using the reactor physics code, RFSP-IST, coupled with the thermal hydraulics code, CATHENA is performed additionally. In the present paper, the newly developed analysis method is briefly described and the results obtained from the moderator system failure accident simulations for Wolsong-1 CANDU 6 reactor by using the new method are summarized. The safety analysis of the moderator system failure accidents for Wolsong-1 CANDU 6 reactor was carried out by using the new code system, i. e., CATHENA and RFSP-IST, instead of the non-IST old codes, namely, SMOKIN G-2 and MODSTBOIL. The analysis results by using the new method revealed as same with the results by using the old method that the fuel integrity is warranted because the localized power peak remained well below the limits and, most importantly, the reactor operation enters into the self-shutdown mode due to the substantial loss of moderator D{sub 2}O inventory from the moderator system. In the analysis results obtained by using the old method, it was predicted that the ROP trip conditions occurred for the transient cases which are also studied in the present paper. But, in the new method, it was found that the ROP trip conditions did not occur. Consequently, in the safety analysis performed additionally by using the new method, the safety of moderator system failure accidents was reassured. In the future, the new analysis method by using the IST codes instead of the non-IST old codes for the moderator system failure accidents is strongly recommended.

  18. The Level of Europium-154 Contaminating Samarium-153-EDTMP Activates the Radiation Alarm System at the US Homeland Security Checkpoints

    Directory of Open Access Journals (Sweden)

    Mohammed Najeeb Al Hallak

    2009-08-01

    Full Text Available 153Sm-EDTMP is a radiopharmaceutical composed of EDTMP (ethylenediamine-tetramethylenephosphonate and Samarium-153 [1]. 153Sm-EDTMP has an affinity for skeletal tissue and concentrates in areas with increased bone turnover; thus, it is successfully used in relieving pain related to diffuse bone metastases [1]. The manufacturing process of 153Sm-EDTMP leads to contamination with 154Eu (Europium-154 [2]. A previous study only alluded to the retention of 154Eu in the bones after receiving treatment with 153Sm-EDTMP [2]. Activation of the alarm at security checkpoints after 153Sm-EDTMP therapy has not been previously reported. Two out of 15 patients who received 153Sm-EDTMP at Roger Maris Cancer Center (Fargo, N. Dak., USA activated the radiation activity sensors while passing through checkpoints; one at a US airport and the other while crossing theAmerican-Canadian border. We assume that the 154Eu which remained in the patients’ bones activated the sensors. Methods: In order to investigate this hypothesis, we obtained the consent from 3 of our 15 patients who received 153Sm-EDTMP within the previous 4 months to 2 years, including the patient who had activated the radiation alarm at the airport. The patients were scanned with a handheld detector and a gamma camera for energies from 511 keV to 1.3 MeV. Results: All three patients exhibited identical spectral images, and further analysis showed that the observed spectra are the result of 154Eu emissions. Conclusion: Depending on the detection thresholds and windows used by local and federal authorities, the remaining activity of 154Eu retained in patients who received 153Sm-EDTMP could be sufficient enough to increase the count rates above background levels and activate the sensors. At Roger Maris Cancer Center, patients are now informed of the potential consequences of 153Sm-EDTMP therapy prior to initiating treatment. In addition, patients treated with 153Sm-EDTMP at Roger Maris Cancer Center

  19. A Security Alarm System Based on ZigBee Technology%一种基于ZigBee技术的智能安防报警系统

    Institute of Scientific and Technical Information of China (English)

    尹玉军; 马晓阳

    2014-01-01

    This paper presents the main characteristics and network topology of ZigBee technology, proposes a design scheme of intelligent security alarm system based on ZigBee technology. The system uses CC2530 microcontroller as the core, utilizes a variety of sensors to collect and monitor real-time environmental parameters, and realizes the alarm in case of abnormal condition. The experiment proves that this system features simple in design, flexible in networking, stable in performance, and has better application prospect.%文章介绍了ZigBee技术的主要特点和网络拓扑结构,提出了一种基于ZigBee技术的智能安防报警系统的设计方案。系统采用TI公司的CC2530单片机为核心,利用多种传感器实时采集和监测环境参量,并对异常情况实现报警。实验证明,本系统设计简单、组网方便、性能稳定,具有良好的应用前景。

  20. Gynecological cancer alarm symptoms:

    DEFF Research Database (Denmark)

    Balasubramaniam, Kirubakaran; Ravn, Pernille; dePont Christensen, René

    2016-01-01

    INTRODUCTION: To determine the proportion of patients who were referred to specialist care after reporting gynecological cancer alarm symptoms to their general practitioner. To investigate whether contact with specialist care was associated with lifestyle factors or socioeconomic status. MATERIAL...... contact with specialist care were obtained from the National Patient Register and the National Health Insurance Service Registry, while information about socioeconomic status was collected from Statistics Denmark. Main outcome measures were percentages of patients having contact with specialist care...... and odds ratios (ORs) for associations between specialist care contact, lifestyle factors and socioeconomic status. RESULTS: The study included 25 866 non-pregnant women; 2957 reported the onset of at least one gynecological cancer alarm symptom, and 683 of these (23.1%) reported symptoms to their general...

  1. Accidents with sulfuric acid

    Directory of Open Access Journals (Sweden)

    Rajković Miloš B.

    2006-01-01

    Full Text Available Sulfuric acid is an important industrial and strategic raw material, the production of which is developing on all continents, in many factories in the world and with an annual production of over 160 million tons. On the other hand, the production, transport and usage are very dangerous and demand measures of precaution because the consequences could be catastrophic, and not only at the local level where the accident would happen. Accidents that have been publicly recorded during the last eighteen years (from 1988 till the beginning of 2006 are analyzed in this paper. It is very alarming data that, according to all the recorded accidents, over 1.6 million tons of sulfuric acid were exuded. Although water transport is the safest (only 16.38% of the total amount of accidents in that way 98.88% of the total amount of sulfuric acid was exuded into the environment. Human factor was the common factor in all the accidents, whether there was enough control of the production process, of reservoirs or transportation tanks or the transport was done by inadequate (old tanks, or the accidents arose from human factor (inadequate speed, lock of caution etc. The fact is that huge energy, sacrifice and courage were involved in the recovery from accidents where rescue teams and fire brigades showed great courage to prevent real environmental catastrophes and very often they lost their lives during the events. So, the phrase that sulfuric acid is a real "environmental bomb" has become clearer.

  2. Design and implementation of an identification system in construction site safety for proactive accident prevention.

    Science.gov (United States)

    Yang, Huanjia; Chew, David A S; Wu, Weiwei; Zhou, Zhipeng; Li, Qiming

    2012-09-01

    Identifying accident precursors using real-time identity information has great potential to improve safety performance in construction industry, which is still suffering from day to day records of accident fatality and injury. Based on the requirements analysis for identifying precursor and the discussion of enabling technology solutions for acquiring and sharing real-time automatic identification information on construction site, this paper proposes an identification system design for proactive accident prevention to improve construction site safety. Firstly, a case study is conducted to analyze the automatic identification requirements for identifying accident precursors in construction site. Results show that it mainly consists of three aspects, namely access control, training and inspection information and operation authority. The system is then designed to fulfill these requirements based on ZigBee enabled wireless sensor network (WSN), radio frequency identification (RFID) technology and an integrated ZigBee RFID sensor network structure. At the same time, an information database is also designed and implemented, which includes 15 tables, 54 queries and several reports and forms. In the end, a demonstration system based on the proposed system design is developed as a proof of concept prototype. The contributions of this study include the requirement analysis and technical design of a real-time identity information tracking solution for proactive accident prevention on construction sites. The technical solution proposed in this paper has a significant importance in improving safety performance on construction sites. Moreover, this study can serve as a reference design for future system integrations where more functions, such as environment monitoring and location tracking, can be added.

  3. 基于PLC的水浸报警集中监视系统设计%Design of Waterlogging Alarm and Centralized Monitoring System Based on PLC

    Institute of Scientific and Technical Information of China (English)

    朱浩; 刘辉峰; 陈铠

    2013-01-01

    介绍了由计算机和S7-200系列PLC组成的水浸报警集中监视系统.在自由口通信模式下,设计了PLC的串口通信程序;利用Windows API函数和Delphi提供的类,开发设计了计算机的通信程序和监视界面,实现了对水浸报警信息的实时监视.通过测试和实际运行发现,该系统工作稳定,功能正常,达到了设计要求.%The waterlogging alarm and centralized monitoring system which consists of PC and S7-200 PLC is introduced. Under free port communication mode, PLC serial communication program is designed. By using Windows API functions and classes in Delphi, communication program and monitoring interface are designed. Monitoring the waterlogging alarm information in real time is realized. The system can run correctly by testing and practical work.

  4. 基于PLC的高层建筑消防报警系统的设计%PLC-based High-rise Building Fire Alarm System Design

    Institute of Scientific and Technical Information of China (English)

    张凤

    2011-01-01

    消防报警系统是人们为了早期发现通报火灾,并及时采取有效措施,控制和扑灭火灾,而设置在建筑物中或其它场所的一种自动消防设施。本文详细介绍了火灾报警系统的传感器原理及其分类,并提出了简单的plc控制器设计梯形图。完成了梯形图编写,分析了一般传感器使用方法。%Fire alarm system for early detection of people informed of the fire,and promptly take effective measures to control and extinguish the fire,and set in a building or other place of an automatic fire-fighting facilities.This paper describes the principle sensor fire alarm systems and classification, and made a simple controller design pie ladder, a ladder to complete written analysis of the general use of the sensor.

  5. Alarming increase in refugees.

    Science.gov (United States)

    1992-01-01

    Over the past decade and half there has been an alarming worldwide increase in refugees. The total rose form 2.8 million in 1976 to 8.2 million in 1980, to 17.3 million in 1990. Africa's refugees rose from 1.2 million in 1976 to 5.6 million in 1990. Asia's increase over this period was much more rapid--from a mere 180,000 to 8 million. In the Americas the numbers more than trebled, from 770,000 to 2.7 million. Europe was the smallest increase, from 570,000 to 894,000. International law defines a refugee as someone outside of their own country, who has a well-founded fear of persecution because of their political or religious beliefs or ethnic origin, and who cannot turn to their own country for protection. Most refugees are genuine by this definition. The increase reflects, in part, fallout from the cold war. Ethiopia, Mozambique and Angola accounted for almost 1/2 of Africa's refugees; Afghanistan alone for 3/4 of Asia's total. They fled, for the most part, from 1 poor country into another, where they added to shortages of land and fuelwood, and intensified environmental pressure. Malawi, 1 of the poorest countries in the world, is sheltering perhaps as many as 750,000 refugees from the war in Mozambique. But among these refugees--especially among those who turned to the rich countries for asylum--were an increasing number of people who were not suffering political persecution. Driven out of their homes by the collapse of their environment or economic despair, and ready to take any means to get across borders, they are a new category: economic and environmental refugees. The most spectacular attempts hit the television screens: the Vietnamese boat people, ships festooned with Albanians. Behind the headlines there was a growing tide of asylum seekers. The numbers rose 10-fold in Germany from 1983 to 1990. In Switzerland they multiplied by 4 times. In Europe, as a whole, they grew from 71,000 in 1983 to an estimated 550,000 in 1990. In 1990 the numbers threatened to

  6. Classification of alarm processing techniques and human performance issues

    Energy Technology Data Exchange (ETDEWEB)

    Kim, I.S.; O' Hara, J.M.

    1993-01-01

    Human factors reviews indicate that conventional alarm systems based on the one sensor, one alarm approach, have many human engineering deficiencies, a paramount example being too many alarms during major disturbances. As an effort to resolve these deficiencies, various alarm processing systems have been developed using different techniques. To ensure their contribution to operational safety, the impacts of those systems on operating crew performance should be carefully evaluated. This paper briefly reviews some of the human factors research issues associated with alarm processing techniques and then discusses a framework with which to classify the techniques. The dimensions of this framework can be used to explore the effects of alarm processing systems on human performance.

  7. Classification of alarm processing techniques and human performance issues

    Energy Technology Data Exchange (ETDEWEB)

    Kim, I.S.; O`Hara, J.M.

    1993-05-01

    Human factors reviews indicate that conventional alarm systems based on the one sensor, one alarm approach, have many human engineering deficiencies, a paramount example being too many alarms during major disturbances. As an effort to resolve these deficiencies, various alarm processing systems have been developed using different techniques. To ensure their contribution to operational safety, the impacts of those systems on operating crew performance should be carefully evaluated. This paper briefly reviews some of the human factors research issues associated with alarm processing techniques and then discusses a framework with which to classify the techniques. The dimensions of this framework can be used to explore the effects of alarm processing systems on human performance.

  8. General methods for alarm reduction; Larmsanering med generella metoder

    Energy Technology Data Exchange (ETDEWEB)

    Ahnlund, Jonas; Bergquist, Tord; Raaberg, Martin [Lund Univ. (Sweden). Dept. of Information Technology

    2003-10-01

    The information in the control rooms has increased due to the technological advances in process control. Large industries produce large data quantities, where some information is unnecessary or even incorrect. The operator needs support from an advanced and well-adjusted alarm system to be able to separate a real event from a minor disturbance. The alarms must be of assistance and not a nuisance. An enhanced alarm situation qualifies an increased efficiency with fewer production disturbances and an improved safety. Yet, it is still unusual that actions are taken to improve the situation. An alarm cleanup with general methods can shortly be described as taking advantage of the control systems built-in functions, the possibility to modify or create function blocks and fine-tune the settings in the alarm system. In this project, we make use of an intelligent software, Alarm Cleanup Toolbox, that simulate different signal processing methods and tries to find improved settings on all the signals in the process. This is a fast and cost-efficient way to improve the overall alarm situation, and lays a foundation for more advanced alarm systems. An alarm cleanup has been carried out at Flintraennan district heating plant in Malmoe, where various signal processing methods has been implemented in a parallel alarm system. This made it possible to compare the two systems under the same conditions. The result is very promising, and shows that a lot of improvements can be achieved with very little effort. An analysis of the alarm system at Vattenreningen (the water purification process) at Heleneholmsverket in Malmoe has been carried out. Alarm Cleanup Toolbox has, besides suggesting improved settings, also found logical errors in the alarm system. Here, no implementation was carried out and therefore the results are analytical, but they validate the efficiency of the general methods. The project has shown that an alarm cleanup with general methods is cost-efficient, and that the

  9. Alarm management in gas pipeline plant: a case study

    Energy Technology Data Exchange (ETDEWEB)

    Araujo, Juliano; Lima, Marcelo; Leitao, Gustavo; Guedes, Luiz Affonso [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil); Branco, Nicolau; Coelho, Robson; Elias, Gustavo Passos; Nunes, Marcelo [Transportadora Brasileira Gasoduto Bolivia-Brasil (TBG), Rio de Janeiro, RJ (Brazil)

    2009-07-01

    In order to improve the requirements of industrial processes, many decision support systems have been introduced in recent years. In this context, the alarm management systems have great relevance. On the other hand, the informatics revolution allowed a great increase of information concerning the operation of the industrial processes. Currently, process operators handle an excessive number of about 1.500 alarms per day. Thus, this overdose of information implies in the discredit of alarms. Then, in order to improve the operation activities of industrial processes, it is mandatory to incorporate procedures to evaluate and rationalize alarms. Since the EMMUA191 Standard is the reference guide to alarm management, but it does not specify how to execute an alarm management procedure, in this paper, a systematic procedure to evaluate alarms configurations in industrial processes is proposed. This procedure is in line with EMMUA191 and is composed by the following steps: to use statistics analyses to identify problematic alarms, such as occurrence, intermittency, correlation, and flooding calculation; to indicate problematic alarm group; and to propose a set of actions to be implemented. To validate our proposal, we present a case study in a gas pipeline plant using the BR-AlarmExpert software. (author)

  10. Fault Diagnosis with Multi-State Alarms in a Nuclear Power Control Simulation

    Energy Technology Data Exchange (ETDEWEB)

    Stuart A. Ragsdale; Roger Lew; Ronald L. Boring

    2014-09-01

    This research addresses how alarm systems can increase operator performance within nuclear power plant operations. The experiment examined the effects of two types of alarm systems (two-state and three-state alarms) on alarm compliance and diagnosis for two types of faults differing in complexity. We hypothesized the use of three-state alarms would improve performance in alarm recognition and fault diagnoses over that of two-state alarms. Sensitivity and criterion based on the Signal Detection Theory were used to measure performance. We further hypothesized that operator trust would be highest when using three-state alarms. The findings from this research showed participants performed better and had more trust in three-state alarms compared to two-state alarms. Furthermore, these findings have significant theoretical implications and practical applications as they apply to improving the efficiency and effectiveness of nuclear power plant operations.

  11. FAULT DIAGNOSIS WITH MULTI-STATE ALARMS IN A NUCLEAR POWER CONTROL SIMULATOR

    Energy Technology Data Exchange (ETDEWEB)

    Austin Ragsdale; Roger Lew; Brian P. Dyre; Ronald L. Boring

    2012-10-01

    This research addresses how alarm systems can increase operator performance within nuclear power plant operations. The experiment examined the effect of two types of alarm systems (two-state and three-state alarms) on alarm compliance and diagnosis for two types of faults differing in complexity. We hypothesized three-state alarms would improve performance in alarm recognition and fault diagnoses over that of two-state alarms. We used sensitivity and criterion based on Signal Detection Theory to measure performance. We further hypothesized that operator trust would be highest when using three-state alarms. The findings from this research showed participants performed better and had more trust in three-state alarms compared to two-state alarms. Furthermore, these findings have significant theoretical implications and practical applications as they apply to improving the efficiency and effectiveness of nuclear power plant operations.

  12. Research and Design of Monitoring Alarm System for Mine Oxygen Concentration%矿井低氧监测报警系统的研究与设计

    Institute of Scientific and Technical Information of China (English)

    钟文峰

    2013-01-01

    In order to prevent the mine suffocation incidents from happening again, the design of monitoring alarm system for mine oxygen concentration based on microcontroller automotive anti-suffocation. With PIC16 microcontroller as the main control center, the system is capable of real-time monitoring of the concentration of oxygen in mine, and with Zigbee wireless sensor networks technology the monitoring datas to be sent to PIC16 for treatment and to be dynamic displaied on the LED digital tube connected PIC16. When the oxygen concentration is too low, the system automatically starts the alarm device. Through the contrast experiment with oxygen concentration detector, this system can accurately monitoring the oxygen concentration inside the mine, and be able to realize the alarm function. If the mine is to be installed the system, to avoid potential safety problems due to the lack of oxygen in mine.%为了防止矿井窒息事故的发生,设计了一种基于单片机的矿井低氧监测报警系统。该系统以PIC16单片机为主控中心,系统能够实时监测矿井内氧气浓度,并将监测到的数据通过Zigbee无线传感网技术传送到PIC16进行处理,再由连接在PIC16上的LED数码管动态显示氧气浓度。当氧气含量过低时,系统自动启动报警。通过与氧气浓度探测仪对比实验,该系统能够较准确地监测出矿井内氧气浓度,能够实现报警功能。矿井内安装此系统,可随时测量井下氧气浓度,避免矿工因氧气不足带来的安全隐患。

  13. ACCIDENT ANALYSES & CONTROL OPTIONS IN SUPPORT OF THE SLUDGE WATER SYSTEM SAFETY ANALYSIS

    Energy Technology Data Exchange (ETDEWEB)

    WILLIAMS, J.C.

    2003-11-15

    This report documents the accident analyses and nuclear safety control options for use in Revision 7 of HNF-SD-WM-SAR-062, ''K Basins Safety Analysis Report'' and Revision 4 of HNF-SD-SNF-TSR-001, ''Technical Safety Requirements - 100 KE and 100 KW Fuel Storage Basins''. These documents will define the authorization basis for Sludge Water System (SWS) operations. This report follows the guidance of DOE-STD-3009-94, ''Preparation Guide for US. Department of Energy Nonreactor Nuclear Facility Safety Analysis Reports'', for calculating onsite and offsite consequences. The accident analysis summary is shown in Table ES-1 below. While this document describes and discusses potential control options to either mitigate or prevent the accidents discussed herein, it should be made clear that the final control selection for any accident is determined and presented in HNF-SD-WM-SAR-062.

  14. The effectiveness of antilock braking systems in reducing accidents in Great Britain.

    Science.gov (United States)

    Broughton, Jeremy; Baughan, Chris

    2002-05-01

    Antilock braking systems (ABS) are fitted to many new cars with the aims of improving their ability to steer while braking heavily and of reducing stopping distances on some road surfaces. This paper presents the findings of a project that assessed the effectiveness of ABS in reducing accidents in Great Britain. A large postal survey was carried out of the owners of modern cars. asking for details of any accidents in which they had been involved during the previous year as well as factors that might influence their likelihood of being involved in an accident. Questions were also asked to test respondents' knowledge of ABS. ABS cars ditfered in several respects from non-ABS cars, as did the two groups of drivers. Consequently, a sophisticated statistical analysis was required to provide unbiased estimates of the effectiveness of ABS. Various results did not achieve statistical significance, but the overall stability of the results indicates that real effects have been measured. They confirm that ABS does have the potential to reduce the number of accidents, but show that this has not been fully achieved. One reason may be that many drivers have little or no knowledge of ABS.

  15. Likelihood alarm displays. [for human operator

    Science.gov (United States)

    Sorkin, Robert D.; Kantowitz, Barry H.; Kantowitz, Susan C.

    1988-01-01

    In a likelihood alarm display (LAD) information about event likelihood is computed by an automated monitoring system and encoded into an alerting signal for the human operator. Operator performance within a dual-task paradigm was evaluated with two LADs: a color-coded visual alarm and a linguistically coded synthetic speech alarm. The operator's primary task was one of tracking; the secondary task was to monitor a four-element numerical display and determine whether the data arose from a 'signal' or 'no-signal' condition. A simulated 'intelligent' monitoring system alerted the operator to the likelihood of a signal. The results indicated that (1) automated monitoring systems can improve performance on primary and secondary tasks; (2) LADs can improve the allocation of attention among tasks and provide information integrated into operator decisions; and (3) LADs do not necessarily add to the operator's attentional load.

  16. 高压注射器智能导流报警系统设计%Design on Intelligent Diversion & Alarm System of High Pressure Syringe

    Institute of Scientific and Technical Information of China (English)

    李正东; 陈霖; 鲁军; 王熙; 黎海涛

    2011-01-01

    The leakage of high-pressure syringe is usually happened during the course of clinical applications due to its rapid injection speed and high pressure. Based on Texas Instrument(TI)'s microcontroller MSP430F449 and Measurement Specialties Inc(MEAS)'s pressure sensor FS2050. An intelligent diversion & alarm system is designed to prevent the leakage of high-pressure syringe designed. The system can offer real-time monitoring for the full injection process, and start sound & light alarm, switch diversion immediately once the leakage is monitored. The intelligent system can not only overcome the shortcomings of easy to loose on mechanical designs, but also increase the switching function which can effectively reduce the pain of patients. Animal experimental results show that the intelligent diversion & alarm system is reliable and sensitive and can effectively prevent the leakage of high-pressure syringes.%为解决当前医用高压注射器注射药液时因注射速度快、压力高而易发生渗漏的问题,采用TI公司的微控制器MSP430F449及精量电子FS2050压力传感器,设计了一套高压注射器防渗漏智能导流报警系统,可实时监测高压注射过程.一旦监测到渗漏立即进行声光报警,同时迅速进行导流切换.本系统不仅克服了以往机械设计方案易松动的缺点,而且还增加了导流切换功能可有效减轻病人的痛苦.动物实验结果表明,智能导流报警系统稳定可靠、灵敏度高,可有效避免高压注射器的药液渗漏现象的发生.

  17. 多功能防酒驾定位报警系统的设计%The Design of Multifunctional Positioning Alarm System to Prevent Drunk Driving

    Institute of Scientific and Technical Information of China (English)

    王静

    2014-01-01

    Alarm system for real-time detection of the alcohol content of the driver is designed. System can detect whether someone driving by a pressure sensor. Using GPS as the positioning module, the system can real-time receives the location information of the vehicle,and deposits in EEPROM. MCU reads the information and through the LCD1602 display longitude and latitude, date and time and alcohol content, and can realize voice alarm by ISD1420. If the alcohol content exceeds the standard,the system can pat on the brake of automobile,at the same time,through GPS positioning the accurate position of the vehicle through the GSM network to send text messages, realizes the remote alarm. According to the test results,device is stable and reliable,complete functions,and has a good popularization value.%设计了一种实时检测司机酒精含量的报警系统,通过压力传感器检测是否有人驾驶,以MQ-3酒精传感器检测酒精含量,采用GPS作为定位模块,卫星接收车辆实时位置并存入EEPROM中,单片机读取信息并通过LCD1602显示经纬度,时间日期和酒精含量,通过ISD1420实现语音报警。系统在酒精量超标的情况下制动机车,同时通过GPS定位把车辆的精确位置通过GSM网络以短信的形式实现远程报警。经测试表明,系统稳定可靠,功能齐全,具有较好的推广价值。

  18. Habituating alarming atmospheres

    DEFF Research Database (Denmark)

    Højlund, Marie

    functionality for the staff, but are stressful for visitors and patients, as they are designed to demand attention even though they have no direct functional meaning to them. By introducing sounds from the ward, integrated in the furniture as simple sound sample triggers, KidKit invites children to become...... accustomed to the alarming sounds through rhythmic interaction in the waiting room, and bringing the furniture with them afterwards as a secure anchor, when entering the ward. This rhythmic habituation can enable the child to focus her attention on the meeting with the hospitalized relative....

  19. On the registration of FLGPR and IR data for a forward-looking landmine detection system and its use in eliminating FLGPR false alarms

    Science.gov (United States)

    Stone, K.; Keller, J.; Ho, K. C.; Busch, M.; Gader, P. D.

    2008-04-01

    This paper proposes a technique for using infrared (IR) imagery to eliminate false forward-looking ground penetrating radar (FLGPR) detections by examining areas in IR images corresponding to FLGPR alarm locations. The FLGPR and IR co-location is based on the assumption of a flat earth and the pinhole camera model. The parameters of the camera and its location on the vehicle are not assumed to be known. The parameters of the model are estimated using a set of correspondences gathered from the data utilizing the covariance matrix adaptation evolution strategy (CMA-ES) optimization algorithm. Detection of false alarms is accomplished by generating a descriptor, consisting of various statistics calculated from the IR images along with the FLGPR confidence value, for each alarm location. The alarms are then classified based on the Mahalanobis distance between their descriptor and a multivariate normal distribution used to model false alarms. The false alarm distribution is computed from training data where the validity of each alarm location is already known. Using this technique, generally fifteen to twenty percent or more of the FLGPR false alarms can be eliminated without losing any true alarms.

  20. Research and practice of intelligent fire alarm system%智能火灾预警系统的研究与实践

    Institute of Scientific and Technical Information of China (English)

    傅坚尧

    2011-01-01

    以农村小作坊、出租房、小旅馆、门店及广大普通住宅等“散远小”场所为关注点,整合火灾检测、报警、有(无)线通信等成熟技术,设计出成本低、功能完备的火灾自动预警系统.测试表明,该系统运行可靠,各项技术指标均达到了设计需求.%Focusing on "scattered, far, small" places as rural workshops, rental house, small hotels and ordinary residen-tials, integrating mature technologies as fire detection, alarm, wireline and non-wireline communication, low-cost and functional automatic fire warning system was designed. The results show that the system is reliable, and the technical indicators meet the design requirements.

  1. A smart phone-based pocket fall accident detection, positioning, and rescue system.

    Science.gov (United States)

    Kau, Lih-Jen; Chen, Chih-Sheng

    2015-01-01

    We propose in this paper a novel algorithm as well as architecture for the fall accident detection and corresponding wide area rescue system based on a smart phone and the third generation (3G) networks. To realize the fall detection algorithm, the angles acquired by the electronic compass (ecompass) and the waveform sequence of the triaxial accelerometer on the smart phone are used as the system inputs. The acquired signals are then used to generate an ordered feature sequence and then examined in a sequential manner by the proposed cascade classifier for recognition purpose. Once the corresponding feature is verified by the classifier at current state, it can proceed to next state; otherwise, the system will reset to the initial state and wait for the appearance of another feature sequence. Once a fall accident event is detected, the user's position can be acquired by the global positioning system (GPS) or the assisted GPS, and sent to the rescue center via the 3G communication network so that the user can get medical help immediately. With the proposed cascaded classification architecture, the computational burden and power consumption issue on the smart phone system can be alleviated. Moreover, as we will see in the experiment that a distinguished fall accident detection accuracy up to 92% on the sensitivity and 99.75% on the specificity can be obtained when a set of 450 test actions in nine different kinds of activities are estimated by using the proposed cascaded classifier, which justifies the superiority of the proposed algorithm.

  2. Design of an intelligent gas monitor and alarm system%智能瓦斯监测报警系统的设计

    Institute of Scientific and Technical Information of China (English)

    刘亮; 何小刚

    2013-01-01

    新型智能瓦斯监控报警器系统,采用了ARM Cortex-M3系列微控制器STM32F107作为硬件平台,并对各传感器采集的数据进行分析处理,利用人工智能算法中的神经网络作为数据预测模型,同时由RS485通信技术和ZigBee无线通信技术完成对报警设备的控制.为了降低系统硬件成本,减少人工操作,并使系统自行进行多任务的处理与切换,采用了μCOS-Ⅱ作为嵌入式系统.%A new-type intelligent gas monitor and alarm system was designed. The STM32F107 chip of ARM Cortex-M3 series severed as hardware to analyze and calculate the data collected by all sensors. In addition, neural network, one of the artificial intelligence algorithms, was applied as data prediction model, and RS485 communication technology and ZigBee wireless communication technology were used to control the alarm device. In order to reduce the hardware cost and unnecessary manual operation, and to realize automatic processing and shift of multiple system tasks, μCOS- Ⅱ operating system was applied as embedded system to achieve expected objective.

  3. The guard against theft and alarm system of automobile based on the GSM%基于GSM的汽车防盗报警系统

    Institute of Scientific and Technical Information of China (English)

    赵冲

    2011-01-01

    In order to prevent the stolen vehicle more effectively, the guard against theft and alarm system based on the GSM is designed in this paper,which utilizes module Q2403A of WISMO cell-phone. MCU is adopted as the central controller in the system, so that the alarm information can follow mobile phone users in time. On the other hand, the different states of the car can be controled by answering some different special form short messages from the user. In addition, the system can also send the current state to mobile phone users. According to receiving the different content of short message, the interaction can be realized between the message system and mobile phone users.%为了更加有效地防止车辆被盗,笔者设计了一种远程汽车防盗报警系统。系统以单片机作为控制器.利用其通信功能及WISMO移动通信模块Q2403A,将汽车被盗的警情信号用短信息的方式发送到某个确定的手机用户.使该报警信息能及时地跟随手机用户,达到移动报警的目的。同时该手机用户还可以给系统回复短信息。以控制汽车的状态,另外,系统还可以根据接收到的控制短信息的不同内容,向手机用户发送当前系统状态的提示信息.从而实现系统和手机用户之间的互动.

  4. A VR Based Anti-accident Training System for Airport’s Power

    Directory of Open Access Journals (Sweden)

    Gu GuoDong

    2013-05-01

    Full Text Available A virtual environment of airport’s power supply is very useful for anti-accident training. In this paper, an effective method of anti-accident training for airport’s power supply based on Delta3D VR engine was proposed. The architecture of airport’s power supply training system was introduced. The electric closet’s operating simulation was accomplished based on the device’s operation logic. The model of fault and relay protection was designed according to electrical characteristics. A finite automaton model of diesel engine was presented based on operating conditions for virtual operation. Finally, a VR based airport’s power supply system was built and verified in worker’s training.

  5. Anatomy of a system accident: The crash of Avianca Flight 052

    Science.gov (United States)

    Helmreich, Robert L.

    1994-01-01

    On January 25, 1990, Avianca Flight 052 crashed after running out of fuel following a missed approach to New York's John F. Kennedy Airport. Weather was poor on the East Coast of the United States that day, and the flight had experienced several holding patterns enroute from Medellin, Colombia, to New York. The accident is analyzed in terms of Helmreich and Foushee's (1993) model of crew performance and Reason's (1990) model of latent pathogens in system operations.

  6. An investigation of training strategies to improve alarm reactions.

    Science.gov (United States)

    Bliss, James P; Chancey, Eric T

    2014-09-01

    Researchers have suggested that operator training may improve operator reactions; however, researchers have not documented this for alarm reactions. The goal of this research was to train participants to react to alarms using sensor activity patterns. In Experiment 1, 80 undergraduates monitored a simulated security screen while completing a primary word search task. They received spatial, temporal, single sensor, or no training to respond to alarms of differing reliability levels. Analyses revealed more appropriate and quicker reactions when participants were trained and when the alarms were reliable. In Experiment 2, 56 participants practiced time estimation by simple repetition, performance feedback, or performance feedback and temporal subdivision. They then reacted to alarms based on elapsed time between sensor activity and alarm onset. Surprisingly, results indicated that participants did not benefit differentially from temporal interval training, focusing instead on advertised system reliability. Researchers should replicate these findings with realistic tasks and real-world complex task operators.

  7. 46 CFR 111.33-7 - Alarms and shutdowns.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Alarms and shutdowns. 111.33-7 Section 111.33-7 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) ELECTRICAL ENGINEERING ELECTRIC SYSTEMS-GENERAL REQUIREMENTS Power Semiconductor Rectifier Systems § 111.33-7 Alarms and shutdowns. Each power...

  8. 家庭安防系统中手机彩信报警的实现%Realization of multimedia messaging service of home safety alarm system

    Institute of Scientific and Technical Information of China (English)

    张光异; 王会清; 程勇

    2013-01-01

    利用 LabVIEW 软件开发了集现场数据采集、传送及远程监视于一体的彩信实时报警系统。当监控现场有非法侵入时,控制主机收到被触发的探测器报警信号后立即启动相应的模块采集现场的声音与图像,经信号处理后以最直观的彩信形式,通过 GPRS 网络发送到用户设定的手机。系统运行结果表明,数据发送稳定、实时性好,声音和图像清晰,可以作为传统报警方式的补充,也可应用于其他方面的远程监控。%A multimedia messaging service real-time alarm system of onsite data collection, transmission and remote monitoring has been established using LabVIEW development tools. As soon as the probes are triggered by illegal intruder , control host immediately starts the data collection of live sound and image by related module, and after signal processing, the data are sent to the appointed mobile phone. Testing results show that the data transmission is stable, time lag is short, the sound and the image are clear. The MMS can be used as an enhanced assembly to the traditional alarm system , as well as to other remote monitoring.

  9. DC system voltage alarm settings of nuclear power plants%核电站核岛直流系统电压报警定值分析与设计

    Institute of Scientific and Technical Information of China (English)

    郝连钢; 孙炜

    2011-01-01

    利用RCC-E关于直流系统电压性能异常变化范围的规定,以及现有核岛直流系统蓄电池年度放电曲线,结合法国EDF核电站核岛直流系统电压高低报警定值,提出了1000 MW核电机组核岛直流系统电压高、低报警定值设计的新方法.电压报警定值按照系统设计方法,电压高报警定值与下游电源匹配,电压低报警后,蓄电池应能再运行半个多小时.运行实践表明,新的电压高、低报警定值设计合理,在电压异常时,能够及时报警,正确地反映了系统运行的状况.%The design of high and low alarm settings for the DC system voltage of 1 000 MW nuclear power plants is proposed according to the scope of abnormal voltage performances stipulated in RCC-E for DC system and the existing annual discharge curve of DC system battery,with the reference to those of French EDF nuclear power plants. The designed high alarm setting matches the downstream power supply. With the designed low alarm setting,about more than half an hour of system operation by battery is allowed after alarm annunciation. Operational results show that,the designed voltage alarm settings are reasonable,the voltage abnormality is timely alarmed ,and the situation of the system operation is correctly reflected.

  10. Design of On-Board Remote Alarm System Based on GSM Network%基于GSM网络的车载远程报警系统的设计

    Institute of Scientific and Technical Information of China (English)

    孟娜; 王帅; 陈文强; 潘之杰; 赵福全

    2011-01-01

    采用GSM技术设计了车载远程报警系统。该系统以微处理器为控制核心,利用传感器的报警信号,使GSM模块在发生警情的同时发送短信到指定的号码,并且通过CAN总线控制车身其它单元,有效地提高了汽车防盗性能。%The on-board remote alarm system is designed based on the GSM technology. With a MCU as its control core, this system uses the alarm signal of a sensor to make the GSM module send messages to the appointed number at the same time when it alarms. It can control the other body units through CAN bus, thus effectively improving the anti-theft performance of automobile.

  11. Design considerations for post accident monitoring system of a research reactor

    Energy Technology Data Exchange (ETDEWEB)

    Jang, Gwi Sook; Park, Je Yun; Kim, Young Ki [KAERI, Daejeon (Korea, Republic of)

    2012-10-15

    The Post Accident Monitoring System (PAMS) provides primary information for operators to assess the plant conditions and perform their role in bringing the plant to a safe condition during an accident. The PAMS of NPP (Nuclear Power Plant) in KOREA provides the continuous display of the PAM category 1 parameters specified in R.G 1.97, Rev. 03. Recently the PAMS of NPP has been designed according to R.G 1.97, Rev. 04. There is no PAMS at the HANARO in KOREA, but recently RRs (Research Reactors) around the world are going to have PAMS for various multi purposes. We should determine the design considerations for PAMS in a Korean RR based on the design state analysis. Thus, this paper proposes strategies on the design considerations for the PAMS of a Korean RR.

  12. Development of a MAAP-based Severe Accident Training Simulator using Visual System Analyzer

    Energy Technology Data Exchange (ETDEWEB)

    Suh, Jae Seung [SENTECH, Daejeon (Korea, Republic of); Park, Soo Yong; Ahn, Kwang Il; Kim, Kyung Doo [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2011-10-15

    The recent environment of severe accident analysis requires high performance computers to simulate complicated reactor and containment phenomena. In parallel with this, rapid advances in computer technology now enable these codes to run in real or almost real time. The remaining limitation restricting their use on an even wider scale is that most of the existing codes are still subject to a complicated I/O structure. Even user-friendly graphical user interfaces (GUI) will be not likely to help better and efficient interpretation of the analysis results obtained from these codes as well as for their increased use. This situation has motivated the development of easy-to-use GUI tools for severe accident codes, such as ViSA, SNAP, MAAP4-GRAAP, SATS, and et al. For instance, ViSA enables the thermal-hydraulic system codes to be used like a conventional nuclear plant analyzer. Recently, a project for a real time simulation of results obtained using MAAP4 codes under the ViSA environment has been initiated in KAERI. Such a GUI-based interactive interface can be very useful in sharing real time analysis results obtained from the MAAP code. The purpose of this paper is to introduce the current status of a MAAP-based Severe Accident Simulator being coupled with the ViSA system

  13. Study on the establishment of retrospective dosimetry system for nuclear radiation accident(II)

    Energy Technology Data Exchange (ETDEWEB)

    Jun, Jae Shik; Chai, Ha Seok; Lee, Jong Ok [Chungnam National Univ., Taejon (Korea, Republic of)

    1999-03-15

    This study was driven forward centering around physical techniques in retrospective dosimetry system for encountering nuclear radiation accident. The results obtained through this study are summarized as follow : the minimal facilities based on physical techniques should be assured at KINS for appropriate operation and establishment of retrospective accident dosimetry system, the necessary apparatus and man power for retrospective dose assessment by physical techniques might be operated flexibly, however, CL and TL/OSL readers should be equipped with the highest priority, a series of comparative examination of several physical techniques for retrospective dose assessment revealed that most of the irradiated materials around accident sites are usable for the dose assessment, if a priori study on the dosimetrical characteristics of those materials is preceded in accordance with the species of the collectable samples, the results of the study on the CL-dose response and radiation energy dependence of sugar and sorbitol, showed the nonlinearity in CL-dose relationship at the range of low dose(less than 5 Gy), and it led us to perform a study on the correction of the nonlinearity, and in the later study, CL output showed heavy dependence on radiation energy in the energy below around 100 keV and accordingly, a study on the correction for the energy dependence was also carried out, ve were able to obtain good results as a first attempt to carry out such corrections.

  14. 红外图像报警系统的研究与实现%Research and Implementation of Infrared Image Alarm System

    Institute of Scientific and Technical Information of China (English)

    张会敏; 谢泽奇; 张云龙

    2011-01-01

    针对家庭防盗报警系统要求可靠性高、抗干扰能力强、体积小、误报率低、便于调试等特点,设计实现了一种基于AT-mega128的红外图像报警系统;首先介绍系统的总体结构,其中系统采用高性能的AVR单片机ATmega128并结合技术成熟的CMOS图像采集与JPEG图像压缩技术来实现;然后重点阐述系统的工作原理、硬件组成及软件实现方法,详细介绍了系统实现过程中的关键技术;最后在不同光照下对系统进行了测试;测试结果表明:该系统具有测量精度高,运行稳定,实时性好、性价比高,具有一定的实用价值.%An infrared image alarm system is designed and implemented in order to meet the demands of family security-monitoring alarm system-high reliability, strong anti-interference ability, small volume, low error rate and debugging convenience. First about the general structure of the system, it is realized by the high-performance AVR MCU ATmega128 and the mature technique of the CMOS Im age Collecting System and JPEG image compression. Then it expounds emphatically the working principle and implementation method of hardware and software, and gives a detailed description on the key technology during the system design course. The last part is about system test in different illumination. The test result shows that this system has high measuring accuracy, stable operation, good real-time and high performance-price ratio, and it has certain practical value.

  15. 基于用户权限的综合监控系统报警管理研究%Research on Alarm Management of Integrated Supervisory Control System Based on User Permissions

    Institute of Scientific and Technical Information of China (English)

    胡阳

    2015-01-01

    According to the different demand of human-machine interface user permissions and alarm management in Integrated Supervisory Control System, alarm management function was designed and finished based on user permissions, which realized centralized management of user authority and alarm information and obtained good application effect.%针对综合监控系统中人机界面用户权限和报警管理的差异化需求,设计并完成了基于用户权限的报警管理功能,实现了用户权限与报警信息的集中管理,并取得了良好的应用效果。

  16. Decision support system for emergency management of oil spill accidents in the Mediterranean Sea

    Science.gov (United States)

    Liubartseva, Svitlana; Coppini, Giovanni; Pinardi, Nadia; De Dominicis, Michela; Lecci, Rita; Turrisi, Giuseppe; Cretì, Sergio; Martinelli, Sara; Agostini, Paola; Marra, Palmalisa; Palermo, Francesco

    2016-08-01

    This paper presents an innovative web-based decision support system to facilitate emergency management in the case of oil spill accidents, called WITOIL (Where Is The Oil). The system can be applied to create a forecast of oil spill events, evaluate uncertainty of the predictions, and calculate hazards based on historical meteo-oceanographic datasets. To compute the oil transport and transformation, WITOIL uses the MEDSLIK-II oil spill model forced by operational meteo-oceanographic services. Results of the modeling are visualized through Google Maps. A special application for Android is designed to provide mobile access for competent authorities, technical and scientific institutions, and citizens.

  17. As assessment of power system vulnerability to release of carbon fibers during commercial aviation accidents

    Science.gov (United States)

    Larocque, G. R.

    1980-01-01

    The vulnerability of a power distribution system in Bedford and Lexington, Massachusetts to power outages as a result of exposure to carbon fibers released in a commercial aviation accident in 1993 was examined. Possible crash scenarios at Logan Airport based on current operational data and estimated carbon fiber usage levels were used to predict exposure levels and occurrence probabilities. The analysis predicts a mean time between carbon fiber induced power outages of 2300 years with an expected annual consequence of 0.7 persons losing power. In comparison to historical outage data for the system, this represents a 0.007% increase in outage rate and 0.07% increase in consequence.

  18. Helicopter emergency medical services accident rates in different international air rescue systems

    Directory of Open Access Journals (Sweden)

    J Hinkelbein

    2010-04-01

    Full Text Available J Hinkelbein1,2, M Schwalbe2, H V Genzwuerker2,31Department for Anesthesiology and Intensive Care Medicine, University Hospital Cologne, Germany; 2Working Group “Emergency Medicine and Air Rescue”, German Society of Aviation and Space Medicine (DGRLM eV; 3Clinic of Anesthesiology and Intensive Care Medicine, Neckar-Odenwald-Kliniken gGmbH, Hospitals Buchen and Mosbach, Buchen, GermanyAim: Each year approximately two to four helicopter emergency medical services (HEMS crashes occur in Germany. The aim of the present study was to compare crash rates and fatal crash rates in Germany to rates in other countries.Materials and methods: A MEDLINE search from 1970 to 2009 was performed using combinations of the keywords “HEMS”, “rescue helicopter”, “accident”, “accident rate”, “crash”, and “crash rate”. The search was supplemented by additional published data. Data were compared on the basis of 10,000 missions and 100,000 helicopter flying hours. These data were allocated to specific time frames for analyis.Results: Eleven relevant studies were identified. Five studies (three from Germany, one from the US, one from Australia analyzing HEMS accidents on the basis of 10,000 missions were identified. Crash rates per 10,000 missions ranged between 0.4 and 3.05 and fatal crash rates between 0.04 and 2.12. In addition, nine studies (six from the US, two from Germany, one from Australia used 100,000 flying hours as a denominator. Here, crash rates ranged between 1.7 and 13.4 and fatal crash rates between 0.91 and 4.7.Conclusions: Data and accident rates were inhomogeneous and differed significantly. Data analysis was impeded by publication of mean data, use of different time frames, and differences in HEMS systems.Keywords: fatal accident rate, rescue helicopter, fatal crash rate, helicopter emergency medical system, accident analysis

  19. A Remote Alarm System Against Theft for Litchi Orchard Based on GPRS%基于GPRS的荔枝园防盗远程监测系统

    Institute of Scientific and Technical Information of China (English)

    唐宇; 骆少明; 黄伟锋; 张培锋; 王克强

    2017-01-01

    Aiming at the security management difficulties in large-scale litchi orchards with labors shortage , a remote an-ti-theft alarm system based GPRS was proposed in this paper .The system was composed of single chip microcomputer module ,GPRS communication module , sensor module , display module and alarm module .The human body infrared in-duction probe was adopted to monitor orchard information in real time .The GPRS communication module was used to send abnormal location information to the users ’ mobile phones .Results showed that average data transmission time was 29 .19 s.Two modes could normally alarm in adjacent installation mode of six sensors .One mode was that the sensor spacing was 3 cm with 30 °sensor angle and 40 cm-distance between the people to the sensor .Another mode was that the sensor spac-ing was 6 cm with 30 °sensor angle and 70 cm-distance between the people to the sensor .This system was safe and agile , and it has more advantages over traditional monitoring systems .%针对种植规模大的荔枝园劳动力短缺以致安保管理困难的问题,提出了一种基于 GPRS 网络的防盗远程监测系统。该系统由单片机控制模块、GPRS通信模块、传感器模块、显示模块、报警模块及远程数据中心6部分组成,借助GPRS 数据业务,实时地将荔枝园现场的防盗信息发送至远程数据中心,实现对异常情况的报警。测试结果表明:系统的平均数据传输时间为29.91s,6种传感器相邻安装模式中能正常报警的模式有两种。一种模式是传感器间距为3cm且夹角为30°,人到传感器距离为40cm;另一种模式是传感器间距为6cm 且夹角为30°,人到传感器距离为70 cm。该系统安全性高,使用灵活,相比传统的监控系统更有优势。

  20. The Role of Trust and Interaction in Global Positioning System Related Accidents

    Science.gov (United States)

    Johnson, Chris W.; Shea, Christine; Holloway, C. Michael

    2008-01-01

    The Global Positioning System (GPS) uses a network of satellites to calculate the position of a receiver over time. This technology has revolutionized a wide range of safety-critical industries and leisure applications. These systems provide diverse benefits; supplementing the users existing navigation skills and reducing the uncertainty that often characterizes many route planning tasks. GPS applications can also help to reduce workload by automating tasks that would otherwise require finite cognitive and perceptual resources. However, the operation of these systems has been identified as a contributory factor in a range of recent accidents. Users often come to rely on GPS applications and, therefore, fail to notice when they develop faults or when errors occur in the other systems that use the data from these systems. Further accidents can stem from the over confidence that arises when users assume automated warnings will be issued when they stray from an intended route. Unless greater attention is paid to the role of trust and interaction in GPS applications then there is a danger that we will see an increasing number of these failures as positioning technologies become integral in the functioning of increasing numbers of applications.

  1. A visual warning system to reduce struck-by or pinning accidents involving mobile mining equipment.

    Science.gov (United States)

    Sammarco, J; Gallagher, S; Mayton, A; Srednicki, J

    2012-11-01

    This paper describes an experiment to examine whether a visual warning system can improve detection of moving machine hazards that could result in struck-by or pinning accidents. Thirty-six participants, twelve each in one of three age groups, participated in the study. A visual warning system capable of providing four different modes of warning was installed on a continuous mining machine that is used to mine coal. The speed of detecting various machine movements was recorded with and without the visual warning system. The average speed of detection for forward and reverse machine movements was reduced by 75% when using the flashing mode of the visual warning system. This translated to 0.485 m of machine travel for the fast speed condition of 19.8 m/min, which is significant in the context of the confined spaces of a mine. There were no statistically significant differences among age groups in the ability to detect machine movements for the visual warning modes in this study. The visual warning system shows promise as a safety intervention for reducing struck-by or pinning accidents involving continuous mining machines. The methods and results of this study could be applied to other moving machinery used in mining or other industries where moving machinery poses struck-by or pinning hazards.

  2. The development of a nuclear accident risk information system(NARIS)

    Energy Technology Data Exchange (ETDEWEB)

    Jeong, Jong Tae; Jung, Won Dea [Korea Atomic Energy Research Institute, Taejeon (Korea)

    2002-03-01

    The computerized system, NARIS(Nuclear Accident Risk Information System) was developed in order to support the estimation of health effects and the establishment the effective risk reduction strategies. Using the system, we can analyze the distribution of health effects easily by displaying the results on the digital map of the site. Also, the thematic mapping allows the diverse analysis of the distribution of the health effects.The NARIS can be used in the emergency operation facilities in order to analyze the distribution of the health effects resulting from the severe accidents of a nuclear power plant. Also, the rapid analysis of the health effect is possible by storing the health effect results in the form of a database. Therefore, the staffs of the emergency operation facilities can establish the rapid and effective emergency response strategies. The module for the optimization of the costs and benefits and the decision making support will be added. The technical support for the establishment of the optimum and effective emergency response strategies will be possible using this system. 23 figs., 1 tab. (Author)

  3. A diagnostic system for identifying accident conditions in a nuclear reactor

    Energy Technology Data Exchange (ETDEWEB)

    Santhosh, T.V., E-mail: santoshiitb@yahoo.co [Reactor Safety Division, Bhabha Atomic Research Centre, Mumbai (India); Kumar, M.; Thangamani, I.; Srivastava, A.; Dutta, A.; Verma, V.; Mukhopadhyay, D.; Ganju, S.; Chatterjee, B.; Rao, V.V.S.S.; Lele, H.G.; Ghosh, A.K. [Reactor Safety Division, Bhabha Atomic Research Centre, Mumbai (India)

    2011-01-15

    Research highlights: Neural networks based diagnostic system has been developed to identify transients quickly, estimate the source-term and assist the operator to take corrective actions during abnormal situations in 220 MWe PHWRs. The transient data for the break scenarios ranging from 20% to 200% has been generated using RELAP5 and CONTRAN codes. 32 break scenarios of large break LOCA in inlet and outlet reactor headers with and without ECCS have been analyzed using artificial neural networks. A few break scenarios were directly predicted without being trained earlier. Test results obtained from ANN are within the acceptable range. - Abstract: The objective of this study is to develop a system, which assists the operator in identifying an accident quickly using ANNs that diagnoses the accidents based on reactor process parameters, and continuously displays the status of the nuclear reactor. A large database of transient data of reactor process parameters has been generated for reactor core, containment, environmental dispersion and radiological dose to train the ANNs. These data have been generated using various codes e.g., RELAP5-thermal-hydraulics code for the core. The present version of this system is capable of identifying large break LOCA scenarios of 220 MWe Indian PHWRs. The system has been designed to provide the necessary information to the operator to handle emergency situations when the reactor is operating. The diagnostic results obtained from ANNs study are satisfactory.

  4. Issues and challenges for pedestrian active safety systems based on real world accidents.

    Science.gov (United States)

    Hamdane, Hédi; Serre, Thierry; Masson, Catherine; Anderson, Robert

    2015-09-01

    The purpose of this study was to analyze real crashes involving pedestrians in order to evaluate the potential effectiveness of autonomous emergency braking systems (AEB) in pedestrian protection. A sample of 100 real accident cases were reconstructed providing a comprehensive set of data describing the interaction between the vehicle, the environment and the pedestrian all along the scenario of the accident. A generic AEB system based on a camera sensor for pedestrian detection was modeled in order to identify the functionality of its different attributes in the timeline of each crash scenario. These attributes were assessed to determine their impact on pedestrian safety. The influence of the detection and the activation of the AEB system were explored by varying the field of view (FOV) of the sensor and the level of deceleration. A FOV of 35° was estimated to be required to detect and react to the majority of crash scenarios. For the reaction of a system (from hazard detection to triggering the brakes), between 0.5 and 1s appears necessary.

  5. Development of highly reliable power and communication system for essential instruments under severe accidents in NPP

    Energy Technology Data Exchange (ETDEWEB)

    Choi, Bo Hwan; Jang, Gi Chan; Shin, Sung Min; Kang, Hyun Gook; Rim, Chun Taek [Dept. of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon (Korea, Republic of); Lee, Soo Ill [I and C Group, Korea Hydro and Nuclear Power Co., Ltd, Central Research Institute, Daejeon (Korea, Republic of)

    2016-10-15

    This article proposes a highly reliable power and communication system that guarantees the protection of essential instruments in a nuclear power plant under a severe accident. Both power and communication lines are established with not only conventional wired channels, but also the proposed wireless channels for emergency reserve. An inductive power transfer system is selected due to its robust power transfer characteristics under high temperature, high pressure, and highly humid environments with a large amount of scattered debris after a severe accident. A thermal insulation box and a glass-fiber reinforced plastic box are proposed to protect the essential instruments, including vulnerable electronic circuits, from extremely high temperatures of up to 627 .deg. C and pressure of up to 5 bar. The proposed wireless power and communication system is experimentally verified by an inductive power transfer system prototype having a dipole coil structure and prototype Zigbee modules over a 7-m distance, where both the thermal insulation box and the glass-fiber reinforced plastic box are fabricated and tested using a high-temperature chamber. Moreover, an experiment on the effects of a high radiation environment on various electronic devices is conducted based on the radiation test having a maximum accumulated dose of 27 Mrad.

  6. Diagnostic system for identification of accident scenarios in nuclear power plants using artificial neural networks

    Energy Technology Data Exchange (ETDEWEB)

    Santosh, T.V. [Health, Safety and Environment Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085 (India)], E-mail: santutv@barc.gov.in; Srivastava, A.; Sanyasi Rao, V.V.S.; Ghosh, A.K.; Kushwaha, H.S. [Health, Safety and Environment Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085 (India)

    2009-03-15

    This paper presents the work carried out towards developing a diagnostic system for the identification of accident scenarios in 220 MWe Indian PHWRs. The objective of this study is to develop a methodology based on artificial neural networks (ANNs), which assists in identifying a transient quickly and suggests the operator to initiate the corrective actions during abnormal operations of the reactor. An operator support system, known as symptom-based diagnostic system (SBDS), has been developed using ANN that diagnoses the transients based on reactor process parameters, and continuously displays the status of the reactor. As a pilot study, the large break loss of coolant accident (LOCA) with and without the emergency core cooling system (ECCS) in reactor headers has been considered. Several break scenarios of large break LOCA have been analyzed. The time-dependent transient data have been generated using the RELAP5 thermal hydraulic code assuming an equilibrium core, which conforms to a realistic estimation. The diagnostic results obtained from the ANN study are satisfactory. These results have been incorporated in the SBDS software for operator assistance. A few important outputs of the SBDS have been discussed in this paper.

  7. 基于ZigBee技术的嵌入式无线温度报警系统%Embedded Temperature Alarm System Based on ZigBee Technology

    Institute of Scientific and Technical Information of China (English)

    史博研

    2011-01-01

    为了实时分析温度并及时处理危险,设计了基于ZigBee技术的嵌入式无线温度报警系统.系统采集部分由温度采集模块和ZigBee子节点传输模块组成,处理部分由ZigBee主节点及ARM9处理器组成,单片机将DS18B20温度传感器采集到的数据通过ZigBee子节点发送到ZigBee主节点,CPU ARM9分析ZigBee主节点的数据,然后对过高温度进行一系列防范操作.%In order to real-time analysis and timely handling of dangerous temperatures, embedded wireless temperature alarm system is designed based on ZigBee technology.The system consist of two parts, the part of collect consists of temperature acquisition module and the sub-node ZigBee transmission module,and the part of data processing consist of ZigBee main nodes and ARM9 processor .The sub-node ZigBee will sent the data collected by the temperature acquisition module to the master node,CPU ARM9 analysis main node ZigBee data, and then a series of precautions for high temperature operation.

  8. 基于STM32的智能家居无线激光报警系统%Intelligent indoor wireless laser alarm system based on STM32

    Institute of Scientific and Technical Information of China (English)

    李娜; 牛晓飞; 许海峰; 汪材印; 唐永刚

    2013-01-01

    This thesis has designed an intelligent indoor wireless laser alarm system which takes Micro controller Unit STM 32F103 as the core .The system consists of Micro controller Unit ,GSM wireless transceiver ,matrix keyboard ,sound and light alarm and pyroelectric laser sensors .Pyroelectric laser sensor receives infrared signal which would be analysed by STM 32F103 .Alarm signal would be send out by the sound and light alarm module .In the meantime GSM would transmit short message to the mobile of user through mobile network to reflect the circumstances of the alarm location .Because of the wide mobile network , the system is unnecessary to set up special network and maintain it .Therefore ,it has unique advantages compared with the traditional monitor systems .%以STM32为核心,设计了智能家居无线激光报警系统。该系统由单片机控制模块、GSM无线发送接收模块、矩阵键盘模块、声光报警模块、热释电激光传感器模块组成。通过热释电激光传感器采集相关信号,单片机STM32经过处理后控制声光报警模块发出报警信号,并将报警信号通过GSM短信模块发送至用户手机上,实时反馈报警地点的情况。该系统利用广泛的移动网络,不需要组建专用网络和维护网络,较传统的监控系统有着独特的优势。

  9. Electromagnetic system for detection and localization of miners caught in mine accidents

    Science.gov (United States)

    Pronenko, Vira; Dudkin, Fedir

    2016-12-01

    The profession of a miner is one of the most dangerous in the world. Among the main causes of fatalities in underground coal mines are the delayed alert of the accident and the lack of information regarding the actual location of the miners after the accident. In an emergency situation (failure or destruction of underground infrastructure), personnel search behind and beneath blockage needs to be performed urgently. However, none of the standard technologies - radio-frequency identification (RFID), Digital Enhanced Cordless Telecommunications (DECT), Wi-Fi, emitting cables, which use the stationary technical devices in mines - provide information about the miners location with the necessary precision. The only technology that is able to provide guaranteed delivery of messages to mine personnel, regardless of their location and under any destruction in the mine, is low-frequency radio technology, which is able to operate through the thickness of rocks even if they are wet. The proposed new system for miner localization is based on solving the inverse problem of determining the magnetic field source coordinates using the data of magnetic field measurements. This approach is based on the measurement of the magnetic field radiated by the miner's responder beacon using two fixed and spaced three-component magnetic field receivers and the inverse problem solution. As a result, a working model of the system for miner's beacon search and localization (MILES - MIner's Location Emergency System) was developed and successfully tested. This paper presents the most important aspects of this development and the results of experimental tests.

  10. The control, monitor, and alarm system for the ICT equipment of the ASTRI SST-2M telescope prototype for the Cherenkov Telescope Array

    Science.gov (United States)

    Gianotti, Fulvio; Fioretti, Valentina; Tanci, Claudio; Conforti, Vito; Tacchini, Alessandro; Leto, Giuseppe; Gallozzi, Stefano; Bulgarelli, Andrea; Trifoglio, Massimo; Malaguti, Giuseppe; Zoli, Andrea

    2014-07-01

    ASTRI is an Italian flagship project whose first goal is the realization of an end-to-end telescope prototype, named ASTRI SST-2M, for the Cherenkov Telescope Array (CTA). The prototype will be installed in Italy during Fall 2014. A second goal will be the realization of the ASTRI/CTA mini-array which will be composed of seven SST-2M telescopes placed at the CTA Southern Site. The Information and Communication Technology (ICT) equipment necessary to drive the infrastructure for the ASTRI SST-2M prototype is being designed as a complete and stand-alone computer center. The design goal is to obtain basic ICT equipment that might be scaled, with a low level of redundancy, for the ASTRI/CTA mini-array, taking into account the necessary control, monitor and alarm system requirements. The ICT equipment envisaged at the Serra La Nave observing station in Italy, where the ASTRI SST-2M telescope prototype will operate, includes computers, servers and workstations, network devices, an uninterruptable power supply system, and air conditioning systems. Suitable hardware and software tools will allow the parameters related to the behavior and health of each item of equipment to be controlled and monitored. This paper presents the proposed architecture and technical solutions that integrate the ICT equipment in the framework of the Observatory Control System package of the ASTRI/CTA Mini- Array Software System, MASS, to allow their local and remote control and monitoring. An end-toend test case using an Internet Protocol thermometer is reported in detail.

  11. 基于页面分析的Web安全监测与报警系统%Web security monitoring and alarm system based on page analysis

    Institute of Scientific and Technical Information of China (English)

    王宇; 刘军; 李源; 王兴伟

    2011-01-01

    Various information services in our social life offer services base on Web techniques, and research and application about Web security is one of the main topics in security area. In this article , we propose a Web security monitoring technology based on page analysis and build an architecture of Web security monitoring and alarm system based on page analysis.%社会生活中的各类信息服务已经大部分是通过基于Web技术的信息系统的方式对外提供,其系统安全研究和应用已经是安全领域主要课题之一.本文提出一种基于页面分析的Web信息系统漏洞检测与状态监测技术,并基于该技术构建了可用的Web信息系统安全监测与报警系统.

  12. Construction of a technique plan repository and evaluation system based on AHP group decision-making for emergency treatment and disposal in chemical pollution accidents

    Energy Technology Data Exchange (ETDEWEB)

    Shi, Shenggang [College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083 (China); College of Chemistry, Baotou Teachers’ College, Baotou 014030 (China); Cao, Jingcan; Feng, Li; Liang, Wenyan [College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083 (China); Zhang, Liqiu, E-mail: zhangliqiu@163.com [College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083 (China)

    2014-07-15

    Highlights: • Different chemical pollution accidents were simplified using the event tree analysis. • Emergency disposal technique plan repository of chemicals accidents was constructed. • The technique evaluation index system of chemicals accidents disposal was developed. • A combination of group decision and analytical hierarchy process (AHP) was employed. • Group decision introducing similarity and diversity factor was used for data analysis. - Abstract: The environmental pollution resulting from chemical accidents has caused increasingly serious concerns. Therefore, it is very important to be able to determine in advance the appropriate emergency treatment and disposal technology for different types of chemical accidents. However, the formulation of an emergency plan for chemical pollution accidents is considerably difficult due to the substantial uncertainty and complexity of such accidents. This paper explains how the event tree method was used to create 54 different scenarios for chemical pollution accidents, based on the polluted medium, dangerous characteristics and properties of chemicals involved. For each type of chemical accident, feasible emergency treatment and disposal technology schemes were established, considering the areas of pollution source control, pollutant non-proliferation, contaminant elimination and waste disposal. Meanwhile, in order to obtain the optimum emergency disposal technology schemes as soon as the chemical pollution accident occurs from the plan repository, the technique evaluation index system was developed based on group decision-improved analytical hierarchy process (AHP), and has been tested by using a sudden aniline pollution accident that occurred in a river in December 2012.

  13. Accurate dose assessment system for an exposed person utilising radiation transport calculation codes in emergency response to a radiological accident.

    Science.gov (United States)

    Takahashi, F; Shigemori, Y; Seki, A

    2009-01-01

    A system has been developed to assess radiation dose distribution inside the body of exposed persons in a radiological accident by utilising radiation transport calculation codes-MCNP and MCNPX. The system consists mainly of two parts, pre-processor and post-processor of the radiation transport calculation. Programs for the pre-processor are used to set up a 'problem-dependent' input file, which defines the accident condition and dosimetric quantities to be estimated. The program developed for the post-processor part can effectively indicate dose information based upon the output file of the code. All of the programs in the dosimetry system can be executed with a generally used personal computer and accurately give the dose profile to an exposed person in a radiological accident without complicated procedures. An experiment using a physical phantom was carried out to verify the availability of the dosimetry system with the developed programs in a gamma ray irradiation field.

  14. Enterprise Strategy Information Monitoring and Alarming System%企业战略信息监控报警系统

    Institute of Scientific and Technical Information of China (English)

    钱敬荣; 钱省三; 黄晓东

    2000-01-01

    With the planned economy changing into socialist market economy more deeply, the competition among enterprises is becoming keener. Any enterprise which wants to have competitive advantages must implement enterprise strategic management and at the same time take steps quickly according to circumstantial change to benefit itself or avoid risks. This article discusses the necessity of reinforcing the implementation and control of strategy and setting up the warning system of monitoring enterprise strategic information in the process of enterprise strategic management. It also gives information on how to determine strategic monitoring targets and accomplish this warning system on computer.%随着计划经济向社会主义市场经济转轨的深入,企业所面临的竞争越来越激烈。想要取得竞争的优势,就必须实施企业战略管理,并对环境变化作出迅速反应,做到趋利避险。本文论述了企业战略管理过程中加强战略实施控制与建立企业战略信息监控报警系统的必要性,并对如何确定战略监控指标及如何在计算机上实现该报警系统作了介绍。

  15. Development and operation of the network system for nuclear safety - Improvement of the following accident dose assessment system

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Enn Han; Han, Moon Hee; Suh, Kyung Suk; Hwang, Won Tae [Korea Atomic Energy Research Institute, Taejon (Korea)

    1999-12-01

    The FADAS has been updates for calculating the real-time wind fields continuously at the nuclear sites in Korea. The system has been constructed to compute the wind fields using its own process for the dummy meteorological data, and does not effect on the overall wind field module. If the radioactive materials are released into the atmosphere in real situation, the calculations of wind fields and exposure dose in the previous FADAS are performed in the case of the recognition of the above situation in the source term evaluation module. The current version of FADAS includes the program for evaluating the effect of the predicted accident and the assumed scenario together. The dose assessment module is separated into the real-time and the supposed accident respectively. 8 refs., 17 figs., 10 tabs. (Author)

  16. System analysis with improved thermo-mechanical fuel rod models for modeling current and advanced LWR materials in accident scenarios

    Science.gov (United States)

    Porter, Ian Edward

    A nuclear reactor systems code has the ability to model the system response in an accident scenario based on known initial conditions at the onset of the transient. However, there has been a tendency for these codes to lack the detailed thermo-mechanical fuel rod response models needed for accurate prediction of fuel rod failure. This proposed work will couple today's most widely used steady-state (FRAPCON) and transient (FRAPTRAN) fuel rod models with a systems code TRACE for best-estimate modeling of system response in accident scenarios such as a loss of coolant accident (LOCA). In doing so, code modifications will be made to model gamma heating in LWRs during steady-state and accident conditions and to improve fuel rod thermal/mechanical analysis by allowing axial nodalization of burnup-dependent phenomena such as swelling, cladding creep and oxidation. With the ability to model both burnup-dependent parameters and transient fuel rod response, a fuel dispersal study will be conducted using a hypothetical accident scenario under both PWR and BWR conditions to determine the amount of fuel dispersed under varying conditions. Due to the fuel fragmentation size and internal rod pressure both being dependent on burnup, this analysis will be conducted at beginning, middle and end of cycle to examine the effects that cycle time can play on fuel rod failure and dispersal. Current fuel rod and system codes used by the Nuclear Regulatory Commission (NRC) are compilations of legacy codes with only commonly used light water reactor materials, Uranium Dioxide (UO2), Mixed Oxide (U/PuO 2) and zirconium alloys. However, the events at Fukushima Daiichi and Three Mile Island accident have shown the need for exploration into advanced materials possessing improved accident tolerance. This work looks to further modify the NRC codes to include silicon carbide (SiC), an advanced cladding material proposed by current DOE funded research on accident tolerant fuels (ATF). Several

  17. 46 CFR 62.25-20 - Instrumentation, alarms, and centralized stations.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Instrumentation, alarms, and centralized stations. 62.25... Instrumentation, alarms, and centralized stations. (a) General. Minimum instrumentation and alarms required for specific types of automated vital systems are listed in Table 62.35-50. (b) Instrumentation Location....

  18. Reducing false intracranial pressure alarms using morphological waveform features.

    Science.gov (United States)

    Scalzo, Fabien; Liebeskind, David; Hu, Xiao

    2013-01-01

    False alarms produced by patient monitoring systems in intensive care units are a major issue that causes alarm fatigue, waste of human resources, and increased patient risks. While alarms are typically triggered by manually adjusted thresholds, the trend and patterns observed prior to threshold crossing are generally not used by current systems. This study introduces and evaluates, a smart alarm detection system for intracranial pressure signal (ICP) that is based on advanced pattern recognition methods. Models are trained in a supervised fashion from a comprehensive dataset of 4791 manually labeled alarm episodes extracted from 108 neurosurgical patients. The comparative analysis provided between spectral regression, kernel spectral regression, and support vector machines indicates the significant improvement of the proposed framework in detecting false ICP alarms in comparison to a threshold-based technique that is conventionally used. Another contribution of this work is to exploit an adaptive discretization to reduce the dimensionality of the input features. The resulting features lead to a decrease of 30% of false ICP alarms without compromising sensitivity.

  19. NIRS external dose estimation system for Fukushima residents after the Fukushima Dai-ichi NPP accident

    Science.gov (United States)

    Akahane, Keiichi; Yonai, Shunsuke; Fukuda, Shigekazu; Miyahara, Nobuyuki; Yasuda, Hiroshi; Iwaoka, Kazuki; Matsumoto, Masaki; Fukumura, Akifumi; Akashi, Makoto

    2013-04-01

    The great east Japan earthquake and subsequent tsunamis caused Fukushima Dai-ichi Nuclear Power Plant (NPP) accident. National Institute of Radiological Sciences (NIRS) developed the external dose estimation system for Fukushima residents. The system is being used in the Fukushima health management survey. The doses can be obtained by superimposing the behavior data of the residents on the dose rate maps. For grasping the doses, 18 evacuation patterns of the residents were assumed by considering the actual evacuation information before using the survey data. The doses of the residents from the deliberate evacuation area were relatively higher than those from the area within 20 km radius. The estimated doses varied from around 1 to 6 mSv for the residents evacuated from the representative places in the deliberate evacuation area. The maximum dose in 18 evacuation patterns was estimated to be 19 mSv.

  20. APT Blanket System Loss-of-Coolant Accident (LOCA) Based on Initial Conceptual Design - Case 2: with Beam Shutdown Only

    Energy Technology Data Exchange (ETDEWEB)

    Hamm, L.L.

    1998-10-07

    This report is one of a series of reports that document normal operation and accident simulations for the Accelerator Production of Tritium (APT) blanket heat removal system. These simulations were performed for the Preliminary Safety Analysis Report. This report documents the results of simulations of a Loss-of-Flow Accident (LOFA) where power is lost to all of the pumps that circulate water in the blanket region, the accelerator beam is shut off and neither the residual heat removal nor cavity flood systems operate.

  1. Electromagnetic system for detection and localization of the miners caught by accident in mine

    Science.gov (United States)

    Pronenko, Vira; Dudkin, Fedir

    2016-04-01

    It is well known that the profession of a miner is one of the most dangerous in the world. Among the main causes of the people death in the underground coal mining enterprises is their untimely alerting of the accident, as well as the lack of information for the rescuers about the actual location of the miners after the accident. As world practice shows, the electromagnetic (EM) systems for the search and detection of people across a massive layer of rock are the most effective. Such systems are under development almost half a century in many countries dealing with mine industry. However, substantial progress related to the localization of personnel at a distance at least of 20-30 meters through the rock is not reached. In an emergency situation (failure or destruction of underground infrastructure), personnel search behind and beneath of obstruction should be provided urgently. But none of the standard technologies (RFID, DECT, WiFi, emitting cable), which use the stationary technical devices in mines, do not provide notification of people caught by accident location. The only technology that provides guaranteed delivery of messages about the accident to the mine personnel, regardless of their location and under any destruction in the mine, is low-frequency radio technology able to operate through the thickness of rocks. From the general theoretical considerations, it is clear that the miners localization system requires solving the inverse problem of the magnetic field source coordinates determining using the data of 3-component magnetic field measurements. A fundamentally new approach, based on the measurement of the magnetic field of the miner's responder beacon by two fixed and spaced three-component magnetic field receivers and solution of the inverse problem using the results of the magnetic field measurement, was proposed. As a result, the concept of the equipment for miners beacon search and localization implementation (MILES - miner's location emergency

  2. Smart Home Based SIM900A running water automatic alarm system%基于SIM900A的智能家居跑水自动报警系统设计

    Institute of Scientific and Technical Information of China (English)

    吴翠娟

    2015-01-01

    In this paper, AT89S52 microcontroller and GSM module chip SIM900A, build a home run water system automatic alarms. System consists of evasion detection circuit, microcontroller minimum system and SIM900A SMS modules and other components. Leak detection circuit detection module raindrop raindrop sensor and signal conditioning circuit, as long as the presence of a small amount of running water, rain sensor can be detected and processed by the signal conditioning circuit, to the SCM system, the microcontroller sends SMS module SIM900A command, start module sends alarm messages to family members, and sends an alarm signal to the smart cell property alarm system.%本文采用单片机AT89S52和GSM模块芯片SIM900A,构建一款家庭跑水自动报警的系统.系统由漏税检测电路、单片机最小系统和SIM900A短信模块等组成.漏水检测电路采用雨滴传感器和信号调理电路构成的雨滴检测模块,只要存在少量跑水,雨滴传感器就可检测到,并经信号调理电路处理后,送到单片机控制系统中,单片机向SIM900A短信模块发送指令,启动模块发送报警提示短信给家庭成员,同时向智能小区中的物业报警系统发送报警信号.

  3. Design of safe monitoring and alarm system for oil tank farm boundary%浅谈油库周界安全防范监控报警系统的设计

    Institute of Scientific and Technical Information of China (English)

    何俊杰

    2015-01-01

    The safe monitoring and alarm system for oil tank farm boundary is designed in this paper based on the pros and cons of different alarm systems.It will provide effective technical solution to keep the security of the tankers.%本文根据各种周界入侵报警系统的优缺点做出正确的选择,合理地设计与建立周界安全防范监控报警系统,为相关保卫人员确保油库区域的安全提供一种有效的技术防范措施。

  4. 一种用于煤气报警器中的双电源供电系统的设计%Design of Double Power Supply System Used in Gas Alarm Apparatus

    Institute of Scientific and Technical Information of China (English)

    方如举; 杨永乐; 马钰慧

    2011-01-01

    One kind of electric circuit of double power supply system is designed, with the aid of circuit structure build and power is cut in coal parameter computation. The shortcoming that alarm apparatus can not ring is overcome when gas alarm system which uses 220V alternating current supply or the dry cell battery power.%从电路结构搭建和参数计算,设计了一种双电源供电系统电路.克服了使用的电源是220V家用电源或干电池供电系统中,在断电时,报警器将无法工作缺点.

  5. The Design and Research of Integrated OSS Alarm System Based on Mobile Network%基于OSS的移动网络综合告警系统设计与研究

    Institute of Scientific and Technical Information of China (English)

    李兴军

    2012-01-01

    基于OSS的移动网络实时告警系统是移动运营商进行网络管理和监控的支撑平台。网络实时告警系统基于TMN理论实现了对通信网元和网管信息的统一接入,从而实现了在监控与系统显示上的一致性。OSS综合告警系统实现了网络故障侦查和客户关联,从而实现了网络信息相关性的分析,为提高网络服务提供了一定的基础。%based on the mobile network real-time OSS alarm system is mobile operators for network management and monitoring of the support platform.Real network alarm system based on the theory of communication network realization TMN and network management information access unity is realized,and the monitoring and system of the consistency of the display.Comprehensive alarm system realizes the OSS network fault detection and customer association,so as to realize the correlation analysis of network information,and to improve the network service provides a certain foundation.

  6. Perceptual specificity in the alarm calls of Gunnison's prairie dogs.

    Science.gov (United States)

    Kiriazis, Judith; Slobodchikoff, C N

    2006-07-01

    Gunnison's prairie dogs have a complex alarm communication system. We show that the escape responses of prairie dogs to naturally occurring live predators differed depending upon the species of predator. We also show that playbacks of alarm calls that were elicited originally by the live predators produced the same escape responses as the live predators themselves. The escape responses fell into two qualitatively different categories: running to the burrow and diving inside for hawks and humans, and standing upright outside the burrow for coyotes and dogs. Within these two categories there were differences in response. For hawks, only the prairie dogs that were in the direct flight path of a stooping red-tailed hawk ran to their burrows and dove inside, while for humans and human alarm call playbacks there was a colony-wide running to the burrows and diving inside. For coyotes and coyote alarm call playbacks there was a colony-wide running to the burrows and standing alert at the burrow rims, while for domestic dogs and playbacks of alarm calls for domestic dogs the prairie dogs assumed an alert posture wherever they were feeding, but did not run to their burrows. These responses to both the live predators and to predator-elicited alarm calls suggest that the alarm calls of Gunnison's prairie dogs contain meaningful referential information about the categories of predators that approach a colony of prairie dogs.

  7. VICTORIA: A mechanistic model of radionuclide behavior in the reactor coolant system under severe accident conditions

    Energy Technology Data Exchange (ETDEWEB)

    Heames, T.J. (Science Applications International Corp., Albuquerque, NM (USA)); Williams, D.A.; Johns, N.A.; Chown, N.M. (UKAEA Atomic Energy Establishment, Winfrith (UK)); Bixler, N.E.; Grimley, A.J. (Sandia National Labs., Albuquerque, NM (USA)); Wheatley, C.J. (UKAEA Safety and Reliability Directorate, Culcheth (UK))

    1990-10-01

    This document provides a description of a model of the radionuclide behavior in the reactor coolant system (RCS) of a light water reactor during a severe accident. This document serves as the user's manual for the computer code called VICTORIA, based upon the model. The VICTORIA code predicts fission product release from the fuel, chemical reactions between fission products and structural materials, vapor and aerosol behavior, and fission product decay heating. This document provides a detailed description of each part of the implementation of the model into VICTORIA, the numerical algorithms used, and the correlations and thermochemical data necessary for determining a solution. A description of the code structure, input and output, and a sample problem are provided. The VICTORIA code was developed upon a CRAY-XMP at Sandia National Laboratories in the USA and a CRAY-2 and various SUN workstations at the Winfrith Technology Centre in England. 60 refs.

  8. Application of Data Transmission Technology in the Automatic Fire Alarm System%数据通信传输技术在火灾自动报警系统中的运用

    Institute of Scientific and Technical Information of China (English)

    梁鸿

    2011-01-01

    At present the fire damage degree and endanger scope are on the rise. In order to reduce the loss of degree, countnes in the world develop automatic fire alarm system. Data transmission technology is a very important technique in the automatic fire alarm system. Combining with automatic fire alarm system from data transmission mode. string/parallel communication mode. flyers/duplex data transmission. data synchronization method, digital coding method, the article introduced the technology.%目前,火灾损失程度和危害范围呈上升趋势.为了降低火灾损失的程度,世界各国都在积极开发火灾自动报警系统.数据通信传输技术是在火灾自动报警系统中非常重要的一种技术.本文结合火灾自动报警系统从数据通信传输模式,串/并行通信方式、传单/双工数据传输方式、数据同步方式、数字编码方式等方面介绍这一技术.

  9. Design and implementation of car anti-theft alarm system based on single-chip%基于单片机汽车防盗报警系统设计与实现

    Institute of Scientific and Technical Information of China (English)

    谢海军; 吴钟云; 杨艳华; 安玉磊

    2012-01-01

    介绍了一种新型的汽车防盗报警系统,以单片机为主控制模块,采用防震传感器以采集外部震动信号,利用声光报警模块发出声光报警,采用移动电话GSM拨打车主电话或给车主发短信,使用无线遥控模块可实现远程遥控开启与关闭系统。试验表明该系统可以实现在0~70 m开阔空地的远程准确的开启与关闭报警功能。%Introduce a new type vehicle anti-theft alarm system based on SCM as the main control module, the shock sensor collecting the external vibration signal, using the acousto-optic alarm module to send the acousto-optic alarm, using GSM to dial the telephone of owner or send text messages to owners, the use of wireless remote control module achieving remote control opening and closing system. The system has high reliability, simple peripheral circuit, strong practicability, low cost and so on.

  10. A weighted dissimilarity index to isolate faults during alarm floods

    CERN Document Server

    Charbonnier, S; Gayet, P

    2015-01-01

    A fault-isolation method based on pattern matching using the alarm lists raised by the SCADA system during an alarm flood is proposed. A training set composed of faults is used to create fault templates. Alarm vectors generated by unknown faults are classified by comparing them with the fault templates using an original weighted dissimilarity index that increases the influence of the few alarms relevant to diagnose the fault. Different decision strategies are proposed to support the operator in his decision making. The performances are evaluated on two sets of data: an artificial set and a set obtained from a highly realistic simulator of the CERN Large Hadron Collider process connected to the real CERN SCADA system.

  11. SCADA alarms processing for wind turbine component failure detection

    Science.gov (United States)

    Gonzalez, E.; Reder, M.; Melero, J. J.

    2016-09-01

    Wind turbine failure and downtime can often compromise the profitability of a wind farm due to their high impact on the operation and maintenance (O&M) costs. Early detection of failures can facilitate the changeover from corrective maintenance towards a predictive approach. This paper presents a cost-effective methodology to combine various alarm analysis techniques, using data from the Supervisory Control and Data Acquisition (SCADA) system, in order to detect component failures. The approach categorises the alarms according to a reviewed taxonomy, turning overwhelming data into valuable information to assess component status. Then, different alarms analysis techniques are applied for two purposes: the evaluation of the SCADA alarm system capability to detect failures, and the investigation of the relation between components faults being followed by failure occurrences in others. Various case studies are presented and discussed. The study highlights the relationship between faulty behaviour in different components and between failures and adverse environmental conditions.

  12. An experimental investigation of the effects of alarm processing and display on operator performance

    Energy Technology Data Exchange (ETDEWEB)

    O`Hara, J.; Brown, W. [Brookhaven National Lab., Upton, NY (United States). Dept. of Advanced Technology; Hallbert, B.; Skraaning, G. [Halden Reactor Project (Norway); Wachtel, J.; Persensky, J. [Nuclear Regulatory Commission, Washington, DC (United States). Office of Nuclear Regulatory Research

    1998-03-01

    This paper describes a research program sponsored by the US Nuclear Regulatory Commission to address the human factors engineering (HFE) aspects of nuclear power plant alarm systems. The overall objective of the program is to develop HFE review guidance for advanced alarm systems. As part of this program, guidance has been developed based on a broad base of technical and research literature. In the course of guidance development, aspects of alarm system design for which the technical basis was insufficient to support complete guidance development were identified. The primary purpose of the research reported in this paper was to evaluate the effects of three of these alarm system design characteristics on operator performance in order to contribute to the understanding of potential safety issues and to provide data to support the development of design review guidance in these areas. Three alarm system design characteristics studied were (1) alarm processing (degree of alarm reduction), (2) alarm availability (dynamic prioritization and suppression), and (3) alarm display (a dedicated tile format, a mixed tile and message list format, and a format in which alarm information is integrated into the process displays). A secondary purpose was to provide confirmatory evidence of selected alarm system guidance developed in an earlier phase of the project. The alarm characteristics were combined into eight separate experimental conditions. Six, two-person crews of professional nuclear power plant operators participated in the study. Following training, each crew completed 16 test trials which consisted of two trials in each of the eight experimental conditions (one with a low-complexity scenario and one with a high-complexity scenario). Measures of process performance, operator task performance, situation awareness, and workload were obtained. In addition, operator opinions and evaluations of the alarm processing and display conditions were collected. No deficient

  13. ZigBee无线传感器网络在消防报警系统中的应用%Research on the Application of ZigBee Wireless Sensor Networks for Fire Alarm System

    Institute of Scientific and Technical Information of China (English)

    阚凤龙; 阚洪亮; 韩中华; 张东伟

    2012-01-01

    As the rapid developments of information sciences and network technologies, which enable the fire alarm system controllers have the characteristics of distributed-intelligence, high-capacities, networked become feasible. In the thesis, wireless fire alarm monitoring system based on Zigbee is designed, which can solove problems such as the complexities in the process of design, constructions and maintenance, the low abilities of anti-disturbance, and high late of false alarm.%无线传感器网络技术的迅速发展。使分布智能式、大容量、网络化的火灾报警控制器的实现成为可能。构建了基于ZigBee的无线火警监测系统。解决了现有消防报警系统设计、施工与维护复杂,抗干扰能力低,故障率和误报率高等问题。

  14. KSTAR Severe Accident Analysis using MELCOR : Ex-vessel Coolant Pipe Break with Failure of Fusion Power Termination System

    Energy Technology Data Exchange (ETDEWEB)

    Moon, Sung Bo; Bang, In Cheol [UNIST, Ulsan (Korea, Republic of)

    2015-10-15

    To investigate the consequence of severe accidents in fusion reactor, a number of thermal hydraulics simulation codes were used (ECART, INTRA, ATHENA/RELAP and so on). MELCOR is chosen as the thermal hydraulics code to simulate the consequence of radioactive material release from accident in preliminary safety report. Capability of the simulation code for fusion reactor severe accident analysis is ability to simulate the hydraulic system in ITER and the transport phenomenon of radionuclides. MELCOR is a fully integrated code that models the accidents in Light Water Reactor (LWR). There are three kinds of radioactive materials in fusion reactor; tritium (or Tiritiated water: HTO), activation products (AP) of divertor or first-wall and activated corrosion products(ACP). In generic Site Safety Report (GSSR), the release guidelines for tritium and activation products are listed for normal operation, incidents, and accidents. And this guidelines presented in Table 1. Not only ITER, the KSTAR (Korea Superconducting Tokamak Advanced Research) is also developing fusion research reactor. The scale of facility is smaller than ITER but this small scale of facility offers the experimental flexibility to develop fusion technology. The major differences between KSTAR and ITER systems are presented in Table 2. Fusion source difference between KSTAR and ITER is D-D fusion reaction (Deuterium-Deuterium fusion reaction) and D-T fusion reaction (Deuterium-Tritium fusion reaction). This D-D fusion makes one tritium by 50 percent chance. The radioactivity of tritium is small to consider compared to radioactive materials in nuclear fission reactor. This reaction is presented in equation (1) In the present work, conservatively estimated tritium inventory amount in KSTAR is used with one of the most severe accident in ITER; Ex-vessel pipe break with Fusion Power Termination System (FPTS). The MELCOR KSTAR input is made by scaling down the ITER input deck. So, the detail system is not same

  15. Bicycle accidents.

    Science.gov (United States)

    Lind, M G; Wollin, S

    1986-01-01

    Information concerning 520 bicycle accidents and their victims was obtained from medical records and the victims' replies to questionnaires. The analyzed aspects included risk of injury, completeness of accident registrations by police and in hospitals, types of injuries and influence of the cyclists' age and sex, alcohol, fatigue, hunger, haste, physical disability, purpose of cycling, wearing of protective helmet and other clothing, type and quality of road surface, site of accident (road junctions, separate cycle paths, etc.) and turning manoeuvres.

  16. Pyroelectric infrared alarm system based on human gait recognition%基于人体步态识别的热释电红外传感报警系统

    Institute of Scientific and Technical Information of China (English)

    张涛; 钟舜聪

    2011-01-01

    In order to solve the problem of difficult detecting the motionless human body using pyroelectric infrared (PIR) sensor, a passive PIR alarm system based on human gait recognition was investigated to enhance the intelligence of the system and to reduce the false alarm rate. As the detector, PIR sensor was employed in the system for non-contact monitoring the human body within a certain distance. The PIR signal was filtered, amplified, and then converted to a digital signal by an analog-to-digital converter. Consequently, the digital signal was sent to a microcomputer ( MCU ) for processing. The human body movement characteristics were analyzed to achieve accurate security alarm purpose. The experimental results demonstrate the stable performance, high sensitivity and low false alarm rate of the developed PIR alarm system, therefore, it can be recommended for the applications in security system of home, shopping center, and warehouse.%针对热释电红外传感器对运动后静止的人体无法感应的缺点,设计了一种基于人体步态识别的热释电红外报警系统,大大提高了系统感知智能度,减少了报警的误报率.该系统利用热释电红外传感器(PIR)作为探头,将感测到人体的红外信息转换成电压信号,通过滤波、放大等信号调理以及经过数据采集后,将信号传递给单片机处理,结合人体运动特征进行步态识别,从而实现智能报警,达到安全防护的目的.研究结果表明,基于人体步态识别的热释电红外报警系统具有性能稳定、灵敏度高、误报率低等优点,适合各种安全报警的场合,具有广泛的应用前景.

  17. Vehicle Fire Alarm System Design Based on MCU%基于单片机的车载火灾报警器设计

    Institute of Scientific and Technical Information of China (English)

    张丽霞; 方建华; 何涛

    2014-01-01

    In order to avoid the personal and property damage due to spontaneous combustion of motor vehicles, this paper designs a vehicle fire alarm. It adopts MCU as the control chip, uses K type thermocouple and MAX6675 chip to real time detect the temperature of flashpoints and reference points on the motor vehicle, when the temperature difference between the flashpoints and reference points exceeds the allowed temperature difference value setting, alarm signal is sent. The running and testing experiments for the fire alarm are carried out, obtaining the expected results, which include the temperature difference between flashpoints and reference points values, so that the pre-alarm of motor vehicle's spontaneous combustion is implemented.%为了避免因机动车自燃带来的人身和财产损害,文章设计了车载火灾报警器,其用单片机做主控制芯片,采用K型热电偶和MAX6675芯片对机动车上的易燃点和基准点的温度进行实时检测,当比较到易燃点温度和基准点温度超过设定的允许温差值时,发出报警。进行了车载火灾报警器运行和测试实验,获得了预期的结果,检测到了机动车易燃点与基准点的温度差值,据此实现了对机动车自燃火灾的预报警。

  18. Male rats respond to their own alarm pheromone.

    Science.gov (United States)

    Inagaki, Hideaki; Kiyokawa, Yasushi; Takeuchi, Yukari; Mori, Yuji

    2012-01-01

    Pheromones are defined as substances released from an individual (donor) that influence a second individual (recipient) of the same species. However, it is unclear whether mammalian pheromones can affect the donor itself. To address this question, the effect of self-exposure to an alarm pheromone was examined. Exposure to the alarm pheromone resulted in an enhanced anxiety response, which was not different between recipients that perceived their own pheromone and those that perceived another individual's pheromone. The present results suggest that the alarm pheromone influences the emotional system of the recipient as well as induces similar anxiogenic effects on the donor rat that released the alarm pheromone. This is the first evidence demonstrating the effectiveness of mammalian pheromone self-exposure.

  19. Wireless intelligent alarm technology with pyroelectric infrared sensor

    Science.gov (United States)

    Chen, Xiao

    2009-07-01

    Aiming at the defects of monitoring conducted by man in the conventional practice, we study the passive intelligent automatic alarm technology based on the pyroelectric infrared sensor and wireless communication technology. The designed passive infrared wireless alarm is composed of pyroelectric infrared sensors, infrared special chip BISS0001 and their peripheral circuits. When someone enters into the detecting and monitoring range, the alarm will detect the infrared ray of the human radiation by the contactless form and detect the signals of circuit output. Then it translates them into low frequency signals relative with human sports speed, distance and direction, produce corresponding output signals through amplifying by the back state controller, switch on the work power of the wireless transmitting circuit and make it emit the alarm signals. The system enhances the monitoring level and effects and possesses many advantages such as wide detecting range, long detecting distance and high reliability.

  20. Distribution of combustible gas alarm based on embedded Ethernet technology

    Institute of Scientific and Technical Information of China (English)

    DING Xi-bo; ZHANG Jun-jie; WANG Yang

    2008-01-01

    One kind of combustible gas alarms based on industrial Ethernet was designed to prevent the gas leakage in industrial production sites. The alarm adopted the high performance microprocessor LPC2214 as the main chip. The embedded operating system μC/OS-Ⅱ and TCP/IP protocol stack ulP running on LPC2214 con-stitute a development platform of application of the combustible gas alarm. The test shows that it can automati-cally and continuously detect combustible gas in industrial production sites in several positions;it can give out sound-light alarm and take protective measures immediately against the gas leakage ; and it can send the detected data to PC through the Etheruet interface to realize the remote detection. The designed project provides a refer-ence to design industrial devices based on industrial Ethernet.

  1. Interfacing systems LOCAs (Loss of Coolant Accidents) at boiling water reactors

    Energy Technology Data Exchange (ETDEWEB)

    Chu, Tsong-Lun; Fitzpatrick, R.; Stoyanov, S.

    1987-01-01

    The work presented in this paper was performed by Brookhaven National Laboratory (BNL) in support of Nuclear Regulatory Commission's (NRC) effort towards the resolution of Generic Issue 105 ''Interfacing System Loss of Coolant Accidents (LOCAs) at Boiling Water Reactors (BWRs).'' For BWRs, intersystem LOCA have typically either not been considered in probabilistic risk analyses, or if considered, were judged to contribute little to the risk estimates because of their perceived low frequency of occurrence. However, recent operating experience indicates that the pressure isolation valves (PIVs) in BWRs may not adequately protect against overpressurization of low pressure systems. The objective of this paper is to present the results of a study which analyzed interfacing system LOCA at several BWRs. The BWRs were selected to best represent a spectrum of BWRs in service using industry operating event experience and plant-specific information/configurations. The results presented here include some possible changes in test requirements/practices as well as an evaluation of their reduction potential in terms of core damage frequency (CDF).

  2. Development of the simulation system {open_quotes}IMPACT{close_quotes} for analysis of nuclear power plant severe accidents

    Energy Technology Data Exchange (ETDEWEB)

    Naitoh, Masanori; Ujita, Hiroshi; Nagumo, Hiroichi [Nuclear Power Corp. (Japan)] [and others

    1997-07-01

    The Nuclear Power Engineering Corporation (NUPEC) has initiated a long-term program to develop the simulation system {open_quotes}IMPACT{close_quotes} for analysis of hypothetical severe accidents in nuclear power plants. IMPACT employs advanced methods of physical modeling and numerical computation, and can simulate a wide spectrum of senarios ranging from normal operation to hypothetical, beyond-design-basis-accident events. Designed as a large-scale system of interconnected, hierarchical modules, IMPACT`s distinguishing features include mechanistic models based on first principles and high speed simulation on parallel processing computers. The present plan is a ten-year program starting from 1993, consisting of the initial one-year of preparatory work followed by three technical phases: Phase-1 for development of a prototype system; Phase-2 for completion of the simulation system, incorporating new achievements from basic studies; and Phase-3 for refinement through extensive verification and validation against test results and available real plant data.

  3. Lessons learnt from an international intercomparison of national network systems used to provide early warning of a nuclear accident

    DEFF Research Database (Denmark)

    Saez-Vergara, J.C.; Thompson, I.M.G.; Funck, E.;

    2003-01-01

    and at the Underground Laboratory for Dosimetry and Spectrometry (UDO) of the Physikalisch-Technische Bundesanstalt (PTB) in Germany. The network systems are used continuously to monitor radiation levels throughout a country in order to give early warning of nuclear accidents having transboundary implications......As part of the European Research Council's Fourth Framework Programme, the EURADOS Action Group on Monitoring of External Exposures held an intercomparison of national network systems. This took place during May/June 1999 at the Riso Natural Environmental Radiation Measurement Station in Denmark....... The radiation levels measured are used to estimate the radiation risks to people arising from the accident. Seven European countries participated in the intercomparison with detector systems used in their national network systems as well as with detectors being developed for future use. Since different...

  4. Chernobyl accident and its consequences

    Energy Technology Data Exchange (ETDEWEB)

    Gittus, J.H.

    1987-06-01

    The paper concerns the Chernobyl reactor accident, with emphasis on the design of the RBMK reactor and nuclear safety. A description is given of the Chernobyl nuclear power plant, including details of the RMBK reactor and safety systems. Comments on the design of the RBMK by UK experts prior to the accident are summarized, along with post-accident design changes to improve RBMK safety. Events of the Chernobyl accident are described, as well as design deficiencies highlighted by the accident. Differences between the USSR and UK approaches to nuclear safety are commented on. Finally source terms, release periods and environmental consequences are briefly discussed.

  5. ZONAS OSCURAS EN EL SISTEMA DE ALARMA DE ADVERTENCIA DE TSUNAMI EN CHILE DARK ZONES IN ALARM SYSTEM OF TSUNAMI OF WARNING OF TSUNAMI IN CHILE

    Directory of Open Access Journals (Sweden)

    Gabriel Alvarez

    2010-12-01

    - ministry of interior (ONEMI and hydrographic and oceanographic service of Chilean navy (SHOA. This article deals with experiences carried out in order to activate the warning systems, generating fictional telluric events and / or historical telluric events capable of triggering tsunami occurrences. It also proposes a working hypothesis that will allow monitoring the response of the state agencies, through the procedures established by law in the Republic of Chile. Our research delivers results that allow us to affirm that there are areas for hypothetical events that could generate tsunamis in which the To carry out this research we have used a software called STLAT based on simplified equations of the propagation of a tsunami wave, which has allowed us to get quick results. We have also carried out tests with official data which have shown that the alarm system was not able to respond appropriately to the 8.4 M Atico event that occurred in Peru in 2001.

  6. 21 CFR 876.2040 - Enuresis alarm.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Enuresis alarm. 876.2040 Section 876.2040 Food and... GASTROENTEROLOGY-UROLOGY DEVICES Monitoring Devices § 876.2040 Enuresis alarm. (a) Identification. An enuresis... type of device includes conditioned response enuresis alarms. (b) Classification. Class II...

  7. 10 CFR 74.57 - Alarm resolution.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 2 2010-01-01 2010-01-01 false Alarm resolution. 74.57 Section 74.57 Energy NUCLEAR... Quantities of Strategic Special Nuclear Material § 74.57 Alarm resolution. (a) Licensees subject to § 74.51 shall provide the MC&A alarm resolution capabilities described in paragraphs (b) through (f) of...

  8. Development of Positioning and Alarming Belt System Against Elder People Falling Down Based on Mobile Communication%基于移动通信的老人摔倒定位报警腰带系统的研制

    Institute of Scientific and Technical Information of China (English)

    丁杰; 史建凯; 李成

    2015-01-01

    本文利用ARM单片机为核心,设计了一个基于移动通信网络的老人摔倒定位报警腰带系统。该系统实现了当老人摔倒后立即向监护人远程报警、同时发送定位信息并开启现场录音功能。监护人也可根据需要提取老人定位信息,控制语音报警系统的开关,全程录制老人运动轨迹等,便于对老人日常活动的监护。该系统已成功完成了软硬件联调测试,能提供摔倒检测、定位、录像、录音、语音报警、远程通信等功能。%By using ARM microcontroller as the core, this paper designs a positioning and alarming belt sys-tem against elder people falling down based on mobile communication networks. This system alerts the guardian when the old man falls down, sends the position and opens field recording function as well. The guardian can also extract the information, control the switch of voice alarm system and open the whole recording, which is easy for daily care. The system has been successfully completed debugging and testing of hardware and software, the results show that it can provide many functions of fall down detection, localization, video, audio, voice alarm, remote communication and etc.

  9. 基于超声波传感器的测距报警系统设计%System design of alarm system based on ultrasonic sensor distance measurement

    Institute of Scientific and Technical Information of China (English)

    赵凌

    2013-01-01

      This sound and light alarm system device based on ultrasonic distance measurement controlled by STC89c52(MCU),which can realize the safety monitoring of a specific region. When the intruder appears in the monitoring area, the front ultrasonic sensors will transmit and receive the ultrasonic signal to the MCU.%  本系统是基于STC89C52单片机(MCU)控制的超声波测距声光报警装置,可实现对特定区域的安全监控。当有入侵者出现在监控区域时,前端超声波传感器通过发射和接收超声波,将探测信号传递给系统的主控芯片单片机。

  10. VICTORIA: A mechanistic model of radionuclide behavior in the reactor coolant system under severe accident conditions. Revision 1

    Energy Technology Data Exchange (ETDEWEB)

    Heams, T J [Science Applications International Corp., Albuquerque, NM (United States); Williams, D A; Johns, N A; Mason, A [UKAEA, Winfrith, (England); Bixler, N E; Grimley, A J [Sandia National Labs., Albuquerque, NM (United States); Wheatley, C J [UKAEA, Culcheth (England); Dickson, L W [Atomic Energy of Canada Ltd., Chalk River, ON (Canada); Osborn-Lee, I [Oak Ridge National Lab., TN (United States); Domagala, P; Zawadzki, S; Rest, J [Argonne National Lab., IL (United States); Alexander, C A [Battelle, Columbus, OH (United States); Lee, R Y [Nuclear Regulatory Commission, Washington, DC (United States)

    1992-12-01

    The VICTORIA model of radionuclide behavior in the reactor coolant system (RCS) of a light water reactor during a severe accident is described. It has been developed by the USNRC to define the radionuclide phenomena and processes that must be considered in systems-level models used for integrated analyses of severe accident source terms. The VICTORIA code, based upon this model, predicts fission product release from the fuel, chemical reactions involving fission products, vapor and aerosol behavior, and fission product decay heating. Also included is a detailed description of how the model is implemented in VICTORIA, the numerical algorithms used, and the correlations and thermochemical data necessary for determining a solution. A description of the code structure, input and output, and a sample problem are provided.

  11. Research and Application of Optimization for RPN System Alarm Caused by Source Range Lockout%闭锁源量程导致RPN报警的优化研究及应用

    Institute of Scientific and Technical Information of China (English)

    姚立民; 刘琢; 赖厚晶; 陈卫华

    2013-01-01

    With the nuclear instrumentation system ( RPN) of Ling' ao Nuclear Power Station as example, the issue of system alarm occurs when source range (SR) channel of nuclear power measurement system is normally lockout in power operation is researched, and the optimizing schemes are proposed. The schemes implement certain optimization while keep existing system design. Through analyzing and investigating, the advantages and disadvantages of each scheme are proposed. The optimization of RPN system alarm provides important reference and guidance for follow-up CPR1000 reactor type nuclear power projects.%以岭澳核电站二期机组核功率测量系统(RPN)为例,针对正常闭锁核功率测量系统源量程通道在功率运行期间出现的系统报警问题,提出了相应的优化方案.优化方案在保持现有系统设计的基础上进行一定优化,通过分析和探讨,给出了各种优化方案的优势和不足之处.RPN系统报警的优化方案对CPR1000堆型的后续核电项目具有重要的指导和借鉴意义.

  12. Upgrading the electrical system of the IEA-R1 reactor to avoid triggering event of accidents

    Energy Technology Data Exchange (ETDEWEB)

    Mello, Jose Roberto de; Madi Filho, Tufic, E-mail: jrmello@ipen.br, E-mail: tmfilho@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2015-07-01

    The IEA-R1 research reactor at the Institute of Energy and Nuclear Research (IPEN) is a research reactor open pool type, built and designed by the American firm 'Babcox and Wilcox', having as coolant and moderator demineralized light water and Beryllium and graphite, as reflectors. The power supply system is designed to meet the electricity demand required by the loads of the reactor (Security systems and systems not related to security) in different situations the plant can meet, such as during startup, normal operation at power, shutdown, maintenance, exchange of fuel elements and accident situations. Studies have been done on possible accident initiating events and deterministic techniques were applied to assess the consequences of such incidents. Thus, the methods used to identify and select the accident initiating events, the methods of analysis of accidents, including sequence of events, transient analysis and radiological consequences, have been described. Finally, acceptance criteria of radiological doses are described. Only a brief summary of the item concerning loss of electrical power will be presented. The loss of normal electrical power at the IEA-R1 reactor is very common. In the case of Electric External Power Loss, at the IEA-R1 reactor building, there may be different sequences of events, as described below. When the supply of external energy in the IEA-R1 facility fails, the Electrical Distribution Vital System, consisting of 4 (four) generators type 'UPS', starts operation, immediately and it will continue supplying power to the reactor control table, core cooling system and other security systems. To contribute to security, in the electric power failure, starts to operate the Emergency Cooling System (SRE). SRE has the function of removing residual heat from the core to prevent the melting of fuel elements in the event of loss of refrigerant to the core. Adding to the generators with batteries group system, new auxiliary

  13. Effect of Cellular Phone and Radar Forensics on Search and Rescue Duration for General Aviation Aircraft Accidents in the Contiguous United States

    OpenAIRE

    Wallace, Ryan J

    2014-01-01

    Emergency Locator Transmitters (ELT) are generally the primary tool for locating distressed aircrews following an aircraft accident. In 2009, the International COSPAS-SARSAT organization ordered the cessation of 121.5 MHz ELT satellite monitoring to alleviate systemic false alarms and encourage pilots to upgrade ELTs to modern 406 MHz models. While most nations acquiesced to the mandate, the United States encountered severe resistance from pilot groups. As a result, 121.5 MHz ELTs are still i...

  14. APT Blanket System Loss-of-Helium-Gas Accident Based on Initial Conceptual Design - Helium Supply Rupture into Blanket Module

    Energy Technology Data Exchange (ETDEWEB)

    Hamm, L.L.

    1998-10-07

    The model results are used to determine if beam power shutdown is necessary (or not) as a result of the LOHGA accident to maintain the blanket system well below any of the thermal-hydraulic constraints imposed on the design. The results also provide boundary conditions to the detailed bin model to study the detailed temperature response of the hot blanket module structure. The results for these two cases are documented in the report.

  15. Accident Statistics

    Data.gov (United States)

    Department of Homeland Security — Accident statistics available on the Coast Guard’s website by state, year, and one variable to obtain tables and/or graphs. Data from reports has been loaded for...

  16. Construction of a technique plan repository and evaluation system based on AHP group decision-making for emergency treatment and disposal in chemical pollution accidents.

    Science.gov (United States)

    Shi, Shenggang; Cao, Jingcan; Feng, Li; Liang, Wenyan; Zhang, Liqiu

    2014-07-15

    The environmental pollution resulting from chemical accidents has caused increasingly serious concerns. Therefore, it is very important to be able to determine in advance the appropriate emergency treatment and disposal technology for different types of chemical accidents. However, the formulation of an emergency plan for chemical pollution accidents is considerably difficult due to the substantial uncertainty and complexity of such accidents. This paper explains how the event tree method was used to create 54 different scenarios for chemical pollution accidents, based on the polluted medium, dangerous characteristics and properties of chemicals involved. For each type of chemical accident, feasible emergency treatment and disposal technology schemes were established, considering the areas of pollution source control, pollutant non-proliferation, contaminant elimination and waste disposal. Meanwhile, in order to obtain the optimum emergency disposal technology schemes as soon as the chemical pollution accident occurs from the plan repository, the technique evaluation index system was developed based on group decision-improved analytical hierarchy process (AHP), and has been tested by using a sudden aniline pollution accident that occurred in a river in December 2012.

  17. 气体灭火系统的火灾自动报警和控制探讨%The Discussion about Gas fire extinguishing system of Fire auto-alarm and control

    Institute of Scientific and Technical Information of China (English)

    黄彩萍

    2011-01-01

    This article elaborate the design for fire auto-alarm and control of Gas fire extinguishing system,introduce some security measures for protected area,with the related technical codes and the examples of project.%本文结合相关规范及工程实例,详细阐述了气体灭火系统的火灾自动报警和控制系统设计以及防护区内的安全措施。

  18. Sports Accidents

    CERN Multimedia

    Kiebel

    1972-01-01

    Le Docteur Kiebel, chirurgien à Genève, est aussi un grand ami de sport et de temps en temps médecin des classes genevoises de ski et également médecin de l'équipe de hockey sur glace de Genève Servette. Il est bien qualifié pour nous parler d'accidents de sport et surtout d'accidents de ski.

  19. Alarm reduction with correlation analysis; Larmsanering genom korrelationsanalys

    Energy Technology Data Exchange (ETDEWEB)

    Bergquist, Tord; Ahnlund, Jonas; Johansson, Bjoern; Gaardman, Lennart; Raaberg, Martin [Lund Univ. (Sweden). Dept. of Information Technology

    2004-09-01

    This project's main interest is to improve the overall alarm situation in the control rooms. By doing so, the operators working environment is less overstrained, which simplifies the decision-making. According to a study of the British refinery industry, the operators make wrong decisions in four times out of ten due to badly tuned alarm systems, with heavy expenses as a result. Furthermore, a more efficiently alarm handling is estimated to decrease the production loss with between three and eight percent. This sounds, according to Swedish standards, maybe a bit extreme, but there is no doubt about the benefits of having a well-tuned alarm system. This project can be seen as an extension of 'General Methods for Alarm Reduction' (VARMEFORSK--835), where the process improvements were the result of suggestions tailored for every signal. Here, instead causal dependences in the process are examined. A method for this, specially designed to fit process signals, has been developed. It is called MLPC (Multiple Local Property Correlation) and could be seen as an unprejudiced way of increase the information value in the process. There are a number of ways to make use of the additional process understanding a correlation analysis provides. In the report some are mentioned, foremost aiming to improve the alarm situation for operators. Signals from two heating plants have been analyzed with MLPC. In simulations, with the use of the result from these analyses as a base, a large number of alarms have been successfully suppressed. The results have been studied by personal with process knowledge, and they are very positive to the use of MLPC and they express many benefits by the clarification of process relations. It was established in 'General Methods for Alarm Reduction' that low pass filter are superior to mean value filter and time delay when trying to suppress alarms. As a result, a module for signal processing has been developed. The main purpose is

  20. Alarms Remain,Efforts Continue

    Institute of Scientific and Technical Information of China (English)

    Alice

    2007-01-01

    @@ China must come to terms with the fact that it has quality problems in at least 1% of its products.Though there is no country in the world that can completely avoid problems,given the responsible role China plays on the intemational stage,China should stop to take a look at itself and find ways to improve.China must examine herself carefully,when looking at the production chain;we have to keep aware that some alarms still remain.

  1. Alarming Rise In Birth Defects

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    A rapid rise in birth defects has prompted China to look for causes and solutionsEvery 60 seconds two children are born in China with a handicap.It’s an alarming fact,but one that young adults across the country who hope to have children face every day. At a conference on the prevention of birth defects in Chengdu of Sichuan Province in September,Vice Minister of the National Population and Family Planning Commission Jiang Fan revealed this inconvenient truth, supported by shocking statistics.

  2. APT Blanket System Loss-of-Coolant Accident (LOCA) Based on Initial Conceptual Design - Case 4: External Pressurizer Surge Line Break Near Inlet Header

    Energy Technology Data Exchange (ETDEWEB)

    Hamm, L.L.

    1998-10-07

    This report is one of a series of reports documenting accident scenario simulations for the Accelerator Production of Tritium (APT) blanket heat removal systems. The simulations were performed in support of the Preliminary Safety Analysis Report (PSAR) for the APT.

  3. APT Blanket System Loss-of-Coolant Accident Based on Initial Conceptual Design - Case 5: External RHR Break Near Inlet Header

    Energy Technology Data Exchange (ETDEWEB)

    Hamm, L.L.

    1998-10-07

    This report is one of a series of reports that document normal operation and accident simulations for the Accelerator Production of Tritium (APT) blanket heat removal system. These simulations were performed for the Preliminary Safety Analysis Report.

  4. APT Blanket System Loss-of-Coolant Accident (LOCA) Analysis Based on Initial Conceptual Design - Case 3: External HR Break at Pump Outlet without Pump Trip

    Energy Technology Data Exchange (ETDEWEB)

    Hamm, L.L.

    1998-10-07

    This report is one of a series of reports that document normal operation and accident simulations for the Accelerator Production of Tritium (APT) blanket heat removal (HR) system. These simulations were performed for the Preliminary Safety Analysis Report.

  5. APT Blanket System Loss-of-Flow Accident (LOFA) Analysis Based on Initial Conceptual Design - Case 1: with Beam Shutdown and Active RHR

    Energy Technology Data Exchange (ETDEWEB)

    Hamm, L.L.

    1998-10-07

    This report is one of a series of reports that document normal operation and accident simulations for the Accelerator Production of Tritium (APT) blanket heat removal system. These simulations were performed for the Preliminary Safety Analysis Report.

  6. SCAP: a new methodology for safety management based on feedback from credible accident-probabilistic fault tree analysis system.

    Science.gov (United States)

    Khan, F I; Iqbal, A; Ramesh, N; Abbasi, S A

    2001-10-12

    As it is conventionally done, strategies for incorporating accident--prevention measures in any hazardous chemical process industry are developed on the basis of input from risk assessment. However, the two steps-- risk assessment and hazard reduction (or safety) measures--are not linked interactively in the existing methodologies. This prevents a quantitative assessment of the impacts of safety measures on risk control. We have made an attempt to develop a methodology in which risk assessment steps are interactively linked with implementation of safety measures. The resultant system tells us the extent of reduction of risk by each successive safety measure. It also tells based on sophisticated maximum credible accident analysis (MCAA) and probabilistic fault tree analysis (PFTA) whether a given unit can ever be made 'safe'. The application of the methodology has been illustrated with a case study.

  7. An international intercomparison of national network systems used to provide early warning of a nuclear accident having transboundary implications

    DEFF Research Database (Denmark)

    Thompson, I.M.G.; Andersen, C.E.; Bøtter-Jensen, L.

    2000-01-01

    of these detectors are used. During an accident the data produced by such systems will be exchanged between countries within the European Communities, (EC) and as required by the IAEA's Early Warning Convention between the rest of the world and Europe. It is therefore important to ensure that such data should...... be harmonised so that it can be accurately interpreted by other countries and by international organisations. To assist with such harmonisation an intercomparison was held during May/June 1999 at the Riso Natural Environmental Radiation Measurement Station in Denmark and at the PTB underground laboratory...... for dosimetry and spectrometry (UDO) in Germany. The main aim of the intercomparison was to help ensure that results reported by different countries during a nuclear accident will be consistent and comparable. It is important that during an emergency the measurements of the plume doses or contamination levels...

  8. 基于GSM和nRF24L01的环境监测报警系统设计%Design of Environmental detection and alarm system based on GSM and nRF24L01

    Institute of Scientific and Technical Information of China (English)

    雷宁

    2015-01-01

    本文设计了一种基于GSM和nRF24L01的环境监控报警系统,实现对人体红外、温湿度、天然气浓度、火焰等信号的实时检测,并将检测结果显示于TFT屏幕,出现危险情况启动语音报警,并通过移动网络迅速与用户设置好的手机通信。系统运行稳定、操作方便,适合智能楼宇,家居住宅,企业厂区的远程安防。%This paper presents a design of environmental detection and alarm system based on GSM and nRF24L01,it provides real-time detection of the signal of Infrared radiation of human body,temperature and humidity,gas concentration and flame,then the test results are displayed on TFT.When dangerous appear,the system start voice alarm at once,and quickly set a communication with the user through the mobile phone network.The system is stable,easy to operate,suitable for remote security for intelligent buildings, house,company and factories.

  9. Conceptual Design of Portable Filtered Air Suction Systems For Prevention of Released Radioactive Gas under Severe Accidents of NPP

    Energy Technology Data Exchange (ETDEWEB)

    Gu, Beom W.; Choi, Su Y.; Yim, Man S.; Rim, Chun T. [Korea Advanced Institute of Science and Technology, Daejeon (Korea, Republic of)

    2014-05-15

    It becomes evident that severe accidents may occur by unexpected disasters such as tsunami, heavy flood, or terror. Once radioactive material is released from NPP through severe accidents, there are no ways to prevent the released radioactive gas spreading in the air. As a remedy for this problem, the idea on the portable filtered air suction system (PoFASS) for the prevention of released radioactive gas under severe accidents was proposed. In this paper, the conceptual design of a PoFASS focusing on the number of robot fingers and robot arm rods are proposed. In order to design a flexible robot suction nozzle, mathematical models for the gaps which represent the lifted heights of extensible covers for given convex shapes of pipes and for the covered areas are developed. In addition, the system requirements for the design of the robot arms of PoFASS are proposed, which determine the accessible range of leakage points of released radioactive gas. In this paper, the conceptual designs of the flexible robot suction nozzle and robot arm have been conducted. As a result, the minimum number of robot fingers and robot arm rods are defined to be four and three, respectively. For further works, extensible cover designs on the flexible robot suction nozzle and the application of the PoFASS to the inside of NPP should be studied because the radioactive gas may be released from connection pipes between the containment building and auxiliary buildings.

  10. Independent flameout alarm monitoring system of combustion furnace multi-burners%燃炉多燃烧器独立熄火报警监控系统

    Institute of Scientific and Technical Information of China (English)

    方平; 王一民; 于晓红; 曹旭杰; 何军民

    2014-01-01

    Various combustion furnaces in petrochemical industry use a large number of burners, the normal combustion of burners is related to the safe operation of the combustion furnace. This paper analy-ses how by endoscope-type high temperature probe capture video images of combustion furnace burners, and process images, judge flameout for each burner independently use of computer,when flameout appea-ring in the burner then giving the corresponding alarm. Proved with the accuracy of image analysis soft-ware for judge the flameout of the burner. In the petroleum chemical industry, it will produce far-reac-hing effect for all kinds of fuel, gas-fired boiler risk pre-alarm and safety operation monitoring.%石化各种燃炉内使用的大量燃烧器是否正常燃烧关系到整个燃炉的安全运行。该文分析了如何通过内窥式耐高温探头摄取燃炉内燃烧器视频图像,并使用计算机进行图像处理、分析,对每个燃烧器进行独立的熄火判断,在燃烧器熄火时给出相应的报警。论证了图像分析软件对燃烧器火焰判断的准确性,对石油化工行业各种燃油、燃气锅炉危险预报警等安全运行监控方面将产生深远的影响。

  11. Natural Circulation in the Blanket Heat Removal System During a Loss-of-Pumping Accident (LOFA) Based on Initial Conceptual Design

    Energy Technology Data Exchange (ETDEWEB)

    Hamm, L.L.

    1998-10-07

    A transient natural convection model of the APT blanket primary heat removal (HR) system was developed to demonstrate that the blanket could be cooled for a sufficient period of time for long term cooling to be established following a loss-of-flow accident (LOFA). The particular case of interest in this report is a complete loss-of-pumping accident. For the accident scenario in which pumps are lost in both the target and blanket HR systems, natural convection provides effective cooling of the blanket for approximately 68 hours, and, if only the blanket HR systems are involved, natural convection is effective for approximately 210 hours. The heat sink for both of these accident scenarios is the assumed stagnant fluid and metal on the secondary sides of the heat exchangers.

  12. 自动喷水灭火系统湿式报警阀设置问题探讨%On the Fixation of Hydraulic Alarm Valve of Automatic Water-spray Fire System

    Institute of Scientific and Technical Information of China (English)

    许剑方

    2011-01-01

    Wet alarm valve is a crucial part of automatic water-spray fire system.This paper focuses on whether an automatic water-spay fire system needs a wet alarm valve,whether it is in forms of concentration or distribution,and whether its location should be on the top of the building or at the bottom,and the number of sprays needed.%湿式报警阀是自动喷水灭火系统的重要组成部分。针对湿式报警阀的设置问题,重点探讨了自动喷水灭火系统是否都要设置湿式报警阀;湿式报警阀集中设置还是分散设置;湿式报警阀是底层设置还是楼层设置;湿式报警阀后所带喷头数目等几个问题,以真正发挥湿式报警阀的作用和自动喷水灭火系统的灭火效能。

  13. 关于可燃有毒气体探测报警系统合理设置方案的探讨%The Discussion of Flammable & Toxic Gas Detection Alarm System Set-up Plan

    Institute of Scientific and Technical Information of China (English)

    卢炜

    2016-01-01

    The article analyses the related standards, and based on the engineering practice, discusses the level evaluated of flammable & toxic gas detection alarm system within the layer of the process plant protection, and issued an reasonable hazardous gas detection alarm system frame. At the same time, focus on the real engineering practice environment, issued the practical set-up plan.%本文通过对相关标准规范的分析,结合工程实践过程中遇到的问题,论述了可燃气体探测、有毒气体探测报警系统在过程工厂中的保护层等级与实际效用,并据此提出了较为合理的有害气体探测报警系统的架构。同时针对目前实际状况,提出了可供实际操作的系统组成。

  14. Implementation of numerical simulation techniques in analysis of the accidents in complex technological systems

    Energy Technology Data Exchange (ETDEWEB)

    Klishin, G.S.; Seleznev, V.E.; Aleoshin, V.V. [RFNC-VNIIEF (Russian Federation)

    1997-12-31

    Gas industry enterprises such as main pipelines, compressor gas transfer stations, gas extracting complexes belong to the energy intensive industry. Accidents there can result into the catastrophes and great social, environmental and economic losses. Annually, according to the official data several dozens of large accidents take place at the pipes in the USA and Russia. That is why prevention of the accidents, analysis of the mechanisms of their development and prediction of their possible consequences are acute and important tasks nowadays. The accidents reasons are usually of a complicated character and can be presented as a complex combination of natural, technical and human factors. Mathematical and computer simulations are safe, rather effective and comparatively inexpensive methods of the accident analysis. It makes it possible to analyze different mechanisms of a failure occurrence and development, to assess its consequences and give recommendations to prevent it. Besides investigation of the failure cases, numerical simulation techniques play an important role in the treatment of the diagnostics results of the objects and in further construction of mathematical prognostic simulations of the object behavior in the period of time between two inspections. While solving diagnostics tasks and in the analysis of the failure cases, the techniques of theoretical mechanics, of qualitative theory of different equations, of mechanics of a continuous medium, of chemical macro-kinetics and optimizing techniques are implemented in the Conversion Design Bureau {number_sign}5 (DB{number_sign}5). Both universal and special numerical techniques and software (SW) are being developed in DB{number_sign}5 for solution of such tasks. Almost all of them are calibrated on the calculations of the simulated and full-scale experiments performed at the VNIIEF and MINATOM testing sites. It is worth noting that in the long years of work there has been established a fruitful and effective

  15. Effect of spray system on fission product distribution in containment during a severe accident in a two-loop pressurized water reactor

    Energy Technology Data Exchange (ETDEWEB)

    Dehjourian, Mehdi; Rahgoshay, Mohammad; Jahanfamia, Gholamreza [Dept. of Nuclear Engineering, Science and Research Branch, Islamic Azad University of Tehran, Tehran (Iran, Islamic Republic of); Sayareh, Reza [Faculty of Electrical and Computer Engineering, Kerman Graduate University of Technology, Kerman (Iran, Islamic Republic of); Shirani, Saied [Faculty of Engineering, Shahid Beheshti University, Tehran (Iran, Islamic Republic of)

    2016-08-15

    The containment response during the first 24 hours of a low-pressure severe accident scenario in a nuclear power plant with a two-loop Westinghouse-type pressurized water reactor was simulated with the CONTAIN 2.0 computer code. The accident considered in this study is a large-break loss-of-coolant accident, which is not successfully mitigated by the action of safety systems. The analysis includes pressure and temperature responses, as well as investigation into the influence of spray on the retention of fission products and the prevention of hydrogen combustion in the containment.

  16. Effect of Spray System on Fission Product Distribution in Containment During a Severe Accident in a Two-Loop Pressurized Water Reactor

    Directory of Open Access Journals (Sweden)

    Mehdi Dehjourian

    2016-08-01

    Full Text Available The containment response during the first 24 hours of a low-pressure severe accident scenario in a nuclear power plant with a two-loop Westinghouse-type pressurized water reactor was simulated with the CONTAIN 2.0 computer code. The accident considered in this study is a large-break loss-of-coolant accident, which is not successfully mitigated by the action of safety systems. The analysis includes pressure and temperature responses, as well as investigation into the influence of spray on the retention of fission products and the prevention of hydrogen combustion in the containment.

  17. Development of the scenario-based training system to reduce hazards and prevent accidents during decommissioning of nuclear facilities

    Energy Technology Data Exchange (ETDEWEB)

    Jeong, KwanSeong; Choi, Jong-Won; Moon, JeiKwon; Choi, ByungSeon; Hyun, Dongjun; Lee, Jonghwan; Kim, IkJune; Kim, GeunHo; Kang, ShinYoung [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2015-10-15

    Decommissioning of nuclear facilities has to be accomplished by assuring the safety of workers. Decommissioning workers need familiarization with working environments because working environment is under high radioactivity and work difficulty during decommissioning of nuclear facilities. On-the-job training of decommissioning works could effectively train decommissioning workers but this training approach could consume much costs and poor modifications of scenarios. The efficiency of virtual training system could be much better than that of physical training system. This paper was intended to develop the training system to prevent accidents for decommissioning of nuclear facilities. The requirements for the training system were drawn. The data management modules for the training system were designed. The training system of decommissioning workers was developed on the basis of virtual reality which is flexibly modified. The visualization and measurement in the training system were real-time done according as changes of the decommissioning scenario. It can be concluded that this training system enables the subject to improve his familiarization about working environments and to prevent accidents during decommissioning of nuclear facilities. In the end, the safety during decommissioning of nuclear facilities will be guaranteed under the principle of ALARA.

  18. Alarm management for storage and transportation terminals; Gerenciamento de alarmes para terminais de transferencia e estocagem

    Energy Technology Data Exchange (ETDEWEB)

    Loureiro, Patricia [PETROBRAS, Rio de Janeiro, RJ (Brazil); Feldman, Rafael Noac [PETROBRAS Transporte S.A. (TRANSPETRO), Rio de Janeiro, RJ (Brazil)

    2005-07-01

    Recently, in many industrial segments, it has been taken into account the issues related to the high amount of alarms that are announced in the control rooms, even if the industrial process is under normal conditions. Recent studies and surveys have shown that the three major problems related to it are: alarms that remain active during normal operation; alarms that remain chattering during an operational period; the phenomenon called Alarm flood, that occurs when an extensive amount of alarms is announced and the operator does not have enough time to take effective actions. In order to reduce or to eliminate the two above mentioned causes, alarm analysis and housekeeping, called Alarm Rationalization, have been efficient in major cases, because such facts occur mainly due to inadequate limits definition and/or equipment and instruments out of service or in maintenance. Such alarms are called in the literature as bad-actors or villains, and their occurrences may reach up to 50% of the daily total amount of alarms. This paper aims to present the main results of a project named Alarm Management for Transfer and Storage Terminals. The project development is based on two different terminal surveys, in order not only to identify the most frequent causes of undesirable alarms, but also to generate design standards. The main phases of the project are: alarm rationalization based on bad-actors detection; generate a set of design and operation standards; generate an Alarm Philosophy document for the Terminals. (author)

  19. 33 CFR 127.207 - Warning alarms.

    Science.gov (United States)

    2010-07-01

    ...) WATERFRONT FACILITIES WATERFRONT FACILITIES HANDLING LIQUEFIED NATURAL GAS AND LIQUEFIED HAZARDOUS GAS Waterfront Facilities Handling Liquefied Natural Gas Equipment § 127.207 Warning alarms. (a) The...

  20. Reconstruction system for the river pollution accidents%河流污染事故重建系统

    Institute of Scientific and Technical Information of China (English)

    刘付衍华; 刘茂; 孟博; 毛星

    2011-01-01

    河流污染事故发生后,需要根据检测数据,对污染源进行科学估计.所用软件操作应简单易行,并迅速获得满足一定精度要求的数值解.基于MATLAB和Visual C++技术,对河流污染事故分别在一维及二维的情况下进行了模拟,并将多种模拟结果可视化.另外,系统应用贝叶斯理论,结合河流污染物质扩散模拟模型和监测数据估计污染源的时间、位置和强度等重要参数,采用马尔可夫链蒙特卡罗方法进行后验推断,对污染源泄漏时间、地点和污染源强度等参数进行可能性估计.%In this paper, we have engaged in a study of river pollution accidents and reconstruction projects, in order to reduce the logs of the accidents, building up the reconstruction system. The most important part of this system is the simulation of the river-water pollutants in one-dimensional and two-dimensional, with the accident source reconstruction taken as the key link. Since the river pollution accidents may have a serious impact on the water supply system and the whole aquatic environment, it is necessary to make an immediate decision to control the situation after occurrence of the river pollution accident. For this purpose, we should quickly, first of all, use the one-dimensional and two-dimensional water quality model, to simulate the river pollution accidents, simulate the pollutant concentrations in the river after the leakage over time, and compare the simulation data with the monitoring data, obtain the variance is 5.013 3, so as to indicate a greater accuracy of the simulated results. Secondly, the application of Bayesian MCMC method combine with the use of the river pollutant-diffusion model should be applied together so as to simulate the general situation of the accident source. The convergent estimation of the value of R simulation proves that the simulation result proves to be closer to the actual statistical results. In addition, since the convergence speed

  1. Time changes in radiocesium concentration in aquatic systems affected by the Fukushima Daiichi NPP accident

    Science.gov (United States)

    Onda, Yuichi; Taniguchi, Keisuke; Kato, Hiroaki; Yoshimura, Kazuya; Wakiyama, Yoshifumi; Iwagami, Sho; Tsujimura, Maki; Sakaguchi, Aya; Yamamoto, Masatoshi

    2015-04-01

    Due to Fukushima Daiichi Nuclear Power Plant accident, radioactive materials including Cs-134 and Cs-137 were widely distributed in surrounded area. The radiocesiums have been transported in river networks. The monitoring started at 6 sites from June 2011. Subsequently, additional 24 monitoring sites were installed between October 2012 and January 2013. Flow and turbidity (for calculation of suspended sediment concentration) were measured at each site, while suspended sediments and river water were collected every one or half month to measure Cs-134 and Cs-137 activity concentrations by gamma spectrometry. Also detailed field monitoring has been condcuted in Yamakiya-district, Kawamata town, Fukushima prefecture. These monitoring includes, 1) Radiocesium wash-off from the runoff-erosion plot under different land use, 2) 2. Measurement of radiocesium transfer in forest environment, in association with hydrological pathways such as throughfall and overlandflow on hillslope, 3) Monitoring on radiocesium concentration in soil water, ground water, and spring water, 4)Monitoring of dissolved and particulate radiocesium concentration in river water, and stream water from the forested catchment, and 5)Measurement of radiocesium content in drain water and suspended sediment from paddy field. Our monitoring result demonstrated that the Cs-137 concentration in eroded sediment from the runoff-erosion plot has been almost constant for the past 3 years, however the Cs-137 concentration of suspended sediment from the forested catchment showed slight decrease through time. On the other hand, the suspended sediment from paddy field and those in river water from large catchments exhibited rapid decrease in Cs-137 concentration with time. The decreasing trend of Cs-137 concentration were fitted by the two-component exponential model, differences in decreasing rate of the model were compared and discussed among various land uses and catchment scales. Such analysis can provide

  2. Accidents in nuclear ships

    Energy Technology Data Exchange (ETDEWEB)

    Oelgaard, P.L. [Risoe National Lab., Roskilde (Denmark)]|[Technical Univ. of Denmark, Lyngby (Denmark)

    1996-12-01

    This report starts with a discussion of the types of nuclear vessels accidents, in particular accidents which involve the nuclear propulsion systems. Next available information on 61 reported nuclear ship events in considered. Of these 6 deals with U.S. ships, 54 with USSR ships and 1 with a French ship. The ships are in almost all cases nuclear submarines. Only events that involve the sinking of vessels, the nuclear propulsion plants, radiation exposures, fires/explosions, sea-water leaks into the submarines and sinking of vessels are considered. For each event a summary of available information is presented, and comments are added. In some cases the available information is not credible, and these events are neglected. This reduces the number of events to 5 U.S. events, 35 USSR/Russian events and 1 French event. A comparison is made between the reported Soviet accidents and information available on dumped and damaged Soviet naval reactors. It seems possible to obtain good correlation between the two types of events. An analysis is made of the accident and estimates are made of the accident probabilities which are found to be of the order of 10{sup -3} per ship reactor years. It if finally pointed out that the consequences of nuclear ship accidents are fairly local and does in no way not approach the magnitude of the Chernobyl accident. It is emphasized that some of the information on which this report is based, may not be correct. Consequently some of the results of the assessments made may not be correct. (au).

  3. Non-specific alarm calls trigger mobbing behavior in Hainan gibbons (Nomascus hainanus).

    Science.gov (United States)

    Deng, Huaiqing; Gao, Kai; Zhou, Jiang

    2016-09-30

    Alarm calls are important defensive behaviors. Here, we report the acoustic spectrum characteristics of alarm calls produced by Hainan gibbons (Nomascus hainanus) inhabiting Bawangling National Nature Reserve in Hainan, China. Analysis of call data collected from 2002-2014 shows that alarm calls are emitted by all family group members, except infants. Alarm behavior included simple short alarming calls (7-10 min) followed by longer variable-frequency mobbing calls lasting 5-12 min. The duration of individual alarming and mobbing calls was 0.078 ± 0.014 s and 0.154 ± 0.041 s at frequency ranges of 520-1000 Hz and 690-3920 Hz, respectively. Alarming call duration was positively associated with group size. The alarm calls can trigger mobbing behavior in Hainan gibbons; this is a defense way of social animals, and first report among the primates' species. The system of vocal alarm behavior described in this critically endangered species is simple and effective.

  4. Analysis of Hydrogen Risk Mitigation System for Severe Accidents of EU-APR1400 Using MAAP4 code

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Mun Soo; Suh, Jung Soo; Bae, Byoung Hwan [KHNP Central Research Institute, Daejeon (Korea, Republic of)

    2011-10-15

    According to the EUR (European Utility Requirements for LWR Nuclear Power Plants), it is mandatory that the HMS (Hydrogen Mitigation System) of the Eu-APR1400 should be equipped with a passive or automatic hydrogen control system. Considering this requirement, a PAR (Passive Autocatalytic Recombiner) system was adopted for the HMS of the Eu-APR1400. This passive HMS should be evaluated carefully in order to ensure that the HMS has adequate capacity to control hydrogen concentrations during severe accident conditions and to show that the system can satisfy the design requirements of the EUR. In this paper, analyses were carried out to examine the effectiveness of the HMS incorporated into the Eu- APR1400 design. These analyses were performed using the MAAP (Modular Accident Analysis Program) 4 code. in order to identify whether the HMS could control the average hydrogen concentrations in the containment, such that the concentration would not exceed 10 percent by volume: the analyses also considered whether there was the possibility of inadvertent hydrogen combustion in such processes as FA (Flame Acceleration) and DDT (Deflagration to Detonation Transition)

  5. An analysis of thermionic space nuclear reactor power system: I. Effect of disassembling radial reflector, following a reactivity initiated accident

    Science.gov (United States)

    El-Genk, Mohamed S.; Paramonov, Dmitry

    1993-01-01

    An analysis is performed to determine the effect of disassembling the radial reflector of the TOPAZ-II reactor, following a hypothetical severe Reactivity Initiated Accident (RIA). Such an RIA is assumed to occur during the system start-up in orbit due to a malfunction of the drive mechanism of the control drums, causing the drums to rotate the full 180° outward at their maximum speed of 1.4°/s. Results indicate that disassembling only three of twelve radial reflector panels would successfully shutdown the reactor, with little overheating of the fuel and the moderator.

  6. Application of the Bulgarian emergency response system in case of nuclear accident in environmental assessment study

    Science.gov (United States)

    Syrakov, Dimiter; Veleva, Blagorodka; Georgievs, Emilia; Prodanova, Maria; Slavov, Kiril; Kolarova, Maria

    2014-05-01

    The development of the Bulgarian Emergency Response System (BERS) for short term forecast in case of accidental radioactive releases to the atmosphere has been started in the mid 1990's [1]. BERS comprises of two main parts - operational and accidental, for two regions 'Europe' and 'Northern Hemisphere'. The operational part runs automatically since 2001 using the 72 hours meteorological forecast from DWD Global model, resolution in space of 1.5o and in time - 12 hours. For specified Nuclear power plants (NPPs), 3 days trajectories are calculated and presented on NIMH's specialized Web-site (http://info.meteo.bg/ews/). The accidental part is applied when radioactive releases are reported or in case of emergency exercises. BERS is based on numerical weather forecast information and long-range dispersion model accounting for the transport, dispersion, and radioactive transformations of pollutants. The core of the accidental part of the system is the Eulerian 3D dispersion model EMAP calculating concentration and deposition fields [2]. The system is upgraded with a 'dose calculation module' for estimation of the prognostic dose fields of 31 important radioactive gaseous and aerosol pollutants. The prognostic doses significant for the early stage of a nuclear accident are calculated as follows: the effective doses from external irradiation (air submersion + ground shinning); effective dose from inhalation; summarized effective dose and absorbed thyroid dose [3]. The output is given as 12, 24, 36, 48, 60 and 72 hours prognostic dose fields according the updated meteorology. The BERS was upgraded to simulate the dispersion of nuclear materials from Fukushima NPP [4], and results were presented in NIMH web-site. In addition BERS took part in the respective ENSEMBLE exercises to model 131I and 137Cs in Fukushima source term. In case of governmental request for expertise BERS was applied for environmental impact assessment of hypothetical accidental transboundary

  7. Knowledge Discovery from Communication Network Alarm Databases

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    The technique of Knowledge Discovery in Databases(KDD) to learn valuable knowledge hidden in network alarm databases is introduced. To get such knowledge, we propose an efficient method based on sliding windows (named as Slidwin) to discover different episode rules from time sequential alarm data. The experimental results show that given different thresholds parameters, large amount of different rules could be discovered quickly.

  8. Safety Bulletin 2013-1: When the alarm rings, you must leave!

    CERN Multimedia

    HSE Unit

    2013-01-01

    The HSE Unit just released the Safety Bulletin 2013-1 entitled “When the alarm rings, you must leave!”. The Bulletin is available on EDMS under the following number: 1307611. Be reminded  that HSE Safety Bulletins are published in English and French and share feedbacks of incidents/near miss/accidents that happened on the CERN site with the aim to improve prevention.

  9. A GIS-based prediction and assessment system of off-site accident consequence for Guangdong nuclear power plant.

    Science.gov (United States)

    Wang, X Y; Qu, J Y; Shi, Z Q; Ling, Y S

    2003-01-01

    GNARD (Guangdong Nuclear Accident Real-time Decision support system) is a decision support system for off-site emergency management in the event of an accidental release from the nuclear power plants located in Guangdong province, China. The system is capable of calculating wind field, concentrations of radionuclide in environmental media and radiation doses. It can also estimate the size of the area where protective actions should be taken and provide other information about population distribution and emergency facilities available in the area. Furthermore, the system can simulate and evaluate the effectiveness of countermeasures assumed and calculate averted doses by protective actions. All of the results can be shown and analysed on the platform of a geographical information system (GIS).

  10. Linking road accident data to other files : an integrated road accident recordkeeping system. Contribution in Proceedings of Seminar P 'Road Safety' held at the 14th PTHC Summer Annual Meeting, University of Sussex, England, from 14-17 July 1986. Volume P 284, p. 55-86.

    OpenAIRE

    Harris, S.

    1986-01-01

    The road accident data which the police collect is of great value to road safety research and is used extensively. This data increases greatly in value if it can be linked to other files which contain more detailed information on exposure. Linking road accident data to other files results in what we call an Integrated Road Accident Recordkeeping System in -which the combined value of the linked files is greater than that of the sum of their individual values.

  11. Design of an automatic alarm walking stick system based on Internet of things%基于物联网的自动报警智能拐杖系统的设计

    Institute of Scientific and Technical Information of China (English)

    刘元; 吴彦文; 卢佳卉; 熊雅清; 杨凯; 刘沛泽

    2016-01-01

    随着社会事件的发生,老人安全出行再次引发人们的重点关注。一种基于物联网能实现自动报警的智能拐杖能够保障老人安全出行,拐杖系统包括数据采集与数据处理的拐杖终端。该系统利用ADXL345三轴加速度传感器测量倾角精度高,SIM908模块集GPS单元与GSM 单元于一体的特点,可准确获得老人行走状态并进行判断、处理。实验结果证明,该系统可实现定位、摔倒判断、自动报警、通信等功能,克服了目前国内相关产品只能手动报警的缺陷,可为老人安全出行提供保障。%Safety for the old is a matter of considerable interest .It is a design of intelligent walking stick system which can realize automatic alarm based on Internet of things .Data sampling and data processing are included in the walking stick terminal .The system takes good use of which ADXL345 acceleration sensor has the advantage in measuring angles with high precision and SIM 908 integrates GPS and GSM to get accurate condition of the old ,then decide and take actions . It overcomes the shortage that related domestic products currently can only ask for help manually . Experiment proofs the system can get positions ,detect falling down ,communication and alarm automatically .It is a method to providing security for the elderly .

  12. Feasibility study of superconducting power cables for DC electric railway feeding systems in view of thermal condition at short circuit accident

    Science.gov (United States)

    Kumagai, Daisuke; Ohsaki, Hiroyuki; Tomita, Masaru

    2016-12-01

    A superconducting power cable has merits of a high power transmission capacity, transmission losses reduction, a compactness, etc., therefore, we have been studying the feasibility of applying superconducting power cables to DC electric railway feeding systems. However, a superconducting power cable is required to be cooled down and kept at a very low temperature, so it is important to reveal its thermal and cooling characteristics. In this study, electric circuit analysis models of the system and thermal analysis models of superconducting cables were constructed and the system behaviors were simulated. We analyzed the heat generation by a short circuit accident and transient temperature distribution of the cable to estimate the value of temperature rise and the time required from the accident. From these results, we discussed a feasibility of superconducting cables for DC electric railway feeding systems. The results showed that the short circuit accident had little impact on the thermal condition of a superconducting cable in the installed system.

  13. On a Special Fixation of a Fire Alarming System in a Nuclear Station%谈核电站火灾自动报警系统的特殊配置

    Institute of Scientific and Technical Information of China (English)

    邹田荣

    2012-01-01

    结合核电站火灾危险的特殊性,阐述了核电站常规岛中网控楼、蓄电池室、汽轮机厂房、电缆隧道、输变电变压器等建筑的火灾自动报警系统设备的特殊配置及选用特点,以发挥火灾自动报警系统的监控作用。%This paper explains the unique characteristics of a fire risk in a nuclear station in terms of its normal centre control building,a battery room turbulent plant and wire tunnels and power transformers to make the better use of fire automatic alarm system.

  14. Accident: Reminder

    CERN Multimedia

    2003-01-01

    There is no left turn to Point 1 from the customs, direction CERN. A terrible accident happened last week on the Route de Meyrin just outside Entrance B because traffic regulations were not respected. You are reminded that when travelling from the customs, direction CERN, turning left to Point 1 is forbidden. Access to Point 1 from the customs is only via entering CERN, going down to the roundabout and coming back up to the traffic lights at Entrance B

  15. 基于 GSM 网络的远程红外家庭安防系统设计%Design of Long Range Infrared Alarm Family Safety Pretactive System Based on GSM Network

    Institute of Scientific and Technical Information of China (English)

    于昕梅; 郑友鑫; 郑东涛

    2013-01-01

      This paper designs an long range monitor and controlling system within a Family safety protection. It is that infrared alarm which is controlled by MUC continuously monitoring environment safe inside provision scope, after discovering an excrescent circumstance (infrared alarm be separated to cut off or be destroyed),MUC Correspond with GSM mobile telephone through serial-port, then report the warning message to the control centre or preset cellular phone through the GSM network, after the control centre receive information and carry on analytical judgment, it give out control order to the far end ,and the far end carries on a homologous control. The purpose of family safe precaution is achieved. The system is low cost and reliable which can be applied to commercial applications.%  通过单片机控制红外接口不断感知规定范围内环境安防情况,发现异常情况后,由单片机经由串口与 GSM手机进行通信,再将报警信息经由 GSM 网络传送至控制中心或预置的手机上,控制中心接到报警信息进行分析判断后,将控制命令发给远端进行相应的控制,从而达到安防目的。该系统成本低,性能稳定可靠,具有较高的商业应用价值。

  16. Alarm management in TRANSPETRO National Oil Control Center

    Energy Technology Data Exchange (ETDEWEB)

    Amado, Helio; Costa, Luciano [TRANSPETRO - PETROBRAS Transporte S.A., Rio de Janeiro, RJ (Brazil)

    2009-07-01

    For sure Alarm Management is not a new issue. EEMUA 191 has been around since 1999 and everyone has received visits from consultants in this area. Besides this regulators have requested that operators have a policy for it. However there are few papers showing actual pipeline operator experience in alarm management. In this paper we present the work developed in TRANSPETRO National Oil Control Center since 2006, where we operate 5509 km of crude oil and refined products pipelines. Since the beginning of the centralized operation in 2002, alarm management has been a concern but a systematic approach has been taken since 2006. Initially we will make a brief revision of the literature and show trends for regulations. Then we will show the tools and the approach we have taken. Finally, the further developments we see. The point that we want to discuss is that, it has been very difficult to implement the system in a linear way and we believe that companies that have huge legacy systems, the same probably will occur. Putting in simple words, our main conclusion is: Implementing an Alarm Management policy produces good results however probably sometimes is better not to follow strictly the traditional steps. (author)

  17. Investigation of a hydrogen mitigation system during large break loss-of-coolant accident for a two-loop pressurized water reactor

    Energy Technology Data Exchange (ETDEWEB)

    Dehjourian, Mehdi; Rahgoshay, Mohmmad; Jahanfamia, Gholamreza [Dept. of Nuclear Engineering, Science and Research Branch, Islamic Azad University of Tehran, Tehran (Iran, Islamic Republic of); Sayareh, Reza [Faculty of Electrical and Computer Engineering, Kerman Graduate University of Technology, Kerman (Iran, Islamic Republic of); Shirani, Amir Saied [Faculty of Engineering, Shahid Beheshti University, Tehran (Iran, Islamic Republic of)

    2016-10-15

    Hydrogen release during severe accidents poses a serious threat to containment integrity. Mitigating procedures are necessary to prevent global or local explosions, especially in large steel shell containments. The management of hydrogen safety and prevention of over-pressurization could be implemented through a hydrogen reduction system and spray system. During the course of the hypothetical large break loss-of-coolant accident in a nuclear power plant, hydrogen is generated by a reaction between steam and the fuel-cladding inside the reactor pressure vessel and also core concrete interaction after ejection of melt into the cavity. The MELCOR 1.8.6 was used to assess core degradation and containment behavior during the large break loss-of-coolant accident without the actuation of the safety injection system except for accumulators in Beznau nuclear power plant. Also, hydrogen distribution in containment and performance of hydrogen reduction system were investigated.

  18. 48 CFR 836.513 - Accident prevention.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 5 2010-10-01 2010-10-01 false Accident prevention. 836... prevention. The contracting officer must insert the clause at 852.236-87, Accident Prevention, in solicitations and contracts for construction that contain the clause at FAR 52.236-13, Accident Prevention....

  19. 48 CFR 1836.513 - Accident prevention.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 6 2010-10-01 2010-10-01 true Accident prevention. 1836... 1836.513 Accident prevention. The contracting officer must insert the clause at 1852.223-70, Safety and Health, in lieu of FAR clause 52.236-13, Accident Prevention, and its Alternate I....

  20. 48 CFR 636.513 - Accident prevention.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 4 2010-10-01 2010-10-01 false Accident prevention. 636... CONTRACTING CONSTRUCTION AND ARCHITECT-ENGINEER CONTRACTS Contract Clauses 636.513 Accident prevention. (a) In... contracting activities shall insert DOSAR 652.236-70, Accident Prevention, in lieu of FAR clause...

  1. Three-dimensional dose evaluation system using real-time wind field information for nuclear accidents in Taiwan

    Science.gov (United States)

    Wu, Jay; Lu, Chung-Hsin; Chang, Shu-Jun; Yang, Yung-Muh; Chang, Bor-Jing; Teng, Jen-Hsin

    2006-09-01

    In Taiwan, the three operating nuclear power plants are all built along the coast over complex terrain. Dose estimates after a nuclear accident with releases of radioactive materials, therefore, cannot be accurately calculated using simple dispersion models. We developed a three-dimensional dose evaluation system, which incorporates real-time prognostic wind field information with three-dimensional numerical models to predict dose results. The proposed system consists of three models: a three-dimensional mesoscale atmospheric model (HOTMAC), a three-dimensional transport and diffusion model (RAPTAD), and a dose calculation model (DOSE). The whole-body dose and thyroid dose as well as dose rates can be rapidly estimated and displayed on the three-dimensional terrain model constructed by satellite images. The developed three-dimensional dose evaluation system could accurately forecast the dose results and has been used in the annual nuclear emergency response exercise to provide suggestions for protective measures.

  2. Design of Breakdown Self-diagnostic and Voice Alarm System about Shower Box Group%淋浴箱组故障自诊断语音报警系统的设计

    Institute of Scientific and Technical Information of China (English)

    陈晓东; 王洪喜

    2012-01-01

    It will lead to shower box can not run normally and even explosion if the breakdown of ignition, water pressure and temperature can not timely and effectively control and repair. Aiming at the problem, design the breakdown self-diagnostic and voice alarm system based on MCU. It uses P89LPC935 as the core and timely monitor boiler temperature, water pressure and ignition state by smoke temperature sensor , pressure sensor and fine detector. When breakdown occurs self-priming pump and boiler immediately stop work and voice a-larm for repairing at the same time. It ensures shower box group safety and stable work.%针对淋浴箱组工作时,如果出现点火、水压、炉温过高等故障时得不到及时有效的控制和维修,将会导致箱组无法正常运行甚至发生爆炸的问题,文中设计了基于单片机控制的淋浴箱组故障自诊断语音报警系统.采用以单片机P89LPC935为核心,通过烟温传感器、压力传感器、火焰探测器对炉温、水压及点火的现场情况实时诊断,当有故障出现时立即停止自吸泵和锅炉工作并将故障类型语音报警,以便维修人员及时处理,保证了淋浴箱组的安全、稳定工作.

  3. Industrial accidents triggered by lightning.

    Science.gov (United States)

    Renni, Elisabetta; Krausmann, Elisabeth; Cozzani, Valerio

    2010-12-15

    Natural disasters can cause major accidents in chemical facilities where they can lead to the release of hazardous materials which in turn can result in fires, explosions or toxic dispersion. Lightning strikes are the most frequent cause of major accidents triggered by natural events. In order to contribute towards the development of a quantitative approach for assessing lightning risk at industrial facilities, lightning-triggered accident case histories were retrieved from the major industrial accident databases and analysed to extract information on types of vulnerable equipment, failure dynamics and damage states, as well as on the final consequences of the event. The most vulnerable category of equipment is storage tanks. Lightning damage is incurred by immediate ignition, electrical and electronic systems failure or structural damage with subsequent release. Toxic releases and tank fires tend to be the most common scenarios associated with lightning strikes. Oil, diesel and gasoline are the substances most frequently released during lightning-triggered Natech accidents.

  4. Research and application on FTA model of chemical accident fuzzy system%化工事故模糊系统FTA模型的研究与应用

    Institute of Scientific and Technical Information of China (English)

    王陈玉书; 张园园; 张巨伟; 尚思思; 刘俊亨

    2013-01-01

    针对化工事故模糊系统,基于三角模糊数和事故树建立事故定量分析模型.运用该模型进行案例分析,确定储油罐体发生火灾爆炸事故的概率分布,指出概率的波动范围、平均事故概率,得出基本事件的模糊重要度,进行模糊重要度排序,明确该化工系统危险源分布的状态,指出导致事故发生的最危险路径,给出该危险路径发生的模糊概率,以上为企业管理人员制定安全措施提供重要的参考依据.该模型对于企业进行事故预测、事故原因分析、制定安全对策、风险投资分析具有重要的意义.%Accident quantitative analysis model for chemical accident fuzzy system based on triangular fuzzy number and fault tree was established. This model was applied to analyzing a case, determining the fire and explosion accident probability distribution of oil tank, pointing out that the fluctuation range of probability and the average accident probability, getting the fuzzy important degree of basic events, sorting fuzzy degree of importance, clearing the state of dangerous source distribution about the chemical system, and pointing out the most dangerous path that causes the accident. All of above provide important reference for corporate executives to develop safety measures. The model is important for accident prediction, analyzing the cause of the accident, developing safety countermeasures and analyzing risk investment.

  5. Criticality accident detector coverage analysis using the Monte Carlo Method

    Energy Technology Data Exchange (ETDEWEB)

    Zino, J.F.; Okafor, K.C.

    1993-12-31

    As a result of the need for a more accurate computational methodology, the Los Alamos developed Monte Carlo code MCNP is used to show the implementation of a more advanced and accurate methodology in criticality accident detector analysis. This paper will detail the application of MCNP for the analysis of the areas of coverage of a criticality accident alarm detector located inside a concrete storage vault at the Savannah River Site. The paper will discuss; (1) the generation of fixed-source representations of various criticality fission sources (for spherical geometries); (2) the normalization of these sources to the ``minimum criticality of concern`` as defined by ANS 8.3; (3) the optimization process used to determine which source produces the lowest total detector response for a given set of conditions; and (4) the use of this minimum source for the analysis of the areas of coverage of the criticality accident alarm detector.

  6. The Design and Realization of an Automatic Weibo Alarm Monitor System%一种可自动微博报警的监控系统的设计与实现

    Institute of Scientific and Technical Information of China (English)

    苏金池

    2014-01-01

    设计并实现了一种基于ARM嵌入式平台的可自动发送带GIF图片微博报警的智能视频监控系统。系统在原有的智能监控预警系统的基础上,利用PIL图像库及Python脚本,将每次异常事件后保存的多张JPG图片生成一张GIF动画,并利用新浪微博提供的Python SDK发送一条带GIF图片的微博,起到预警的作用。用户可通过多种微博客户端收到提醒信息。%In this paper, design and realize an intelligent monitor early warning system based on ARM embedded platform, which can send a GIF image to Sina weibo automatically. The system is based on the intelligent monitoring early warning system, using python Imaging Library and Python scripts, to detect the abnormal situation. Then, the system will use multiple JPG images to generate a GIF image, and use Python SDK to send a GIF image to Sina weibo,.This function have the effect of alarm. The us-er can receives the reminding information through a variety of Sina weibo client.

  7. Study on home wireless anti-theft alarm system based on Android%基于Android平台的家用无线防盗报警系统研究

    Institute of Scientific and Technical Information of China (English)

    陈菁; 王志华

    2015-01-01

    在此介绍一种基于Android平台的家用无线防盗报警系统,其不仅实现低成本检测、显示和报警,而且能通过串口WiFi设备将系统数据无线传输到用户的智能手机上,实现远程无线控制。系统采用超声波测距模块、振动检测模块和红外对射电路实现自动检测功能,采用蜂鸣器和LED实现声光报警功能,以内置精简指令集RISC的AVR单片机作为数据处理中心,通过异步串行收发器USART将系统状态数据发送至HLK⁃RM04模块,该模块内置TCP/IP协议栈实现用户串口、以太网、WiFi接口之间数据的转换和传输。系统还通过对Android手机应用程序编程,使用户在智能手机上实现AVR单片机与智能手机之间数据传输,实现对整个系统的设置与控制。%The household anti⁃theft alarm system based on Android platform and combined with the microcontroller not only can achieve low⁃cost detection,display and alarm,but also can transmit the system data to the users’intelligent mobile phone in wireless transmission mode through the serial port WIFI equipment, and realize remote wireless control. The ultrasonic ranging module,vibration detection module and infrared emission circuit are used in the system to realize automatic detection function. The buzzer and LED are adopted to achieve sound and light alarm function. The AVR single chip microcomputer with built⁃in reduced instruction set is taken as data processing center. The system status data is sent to the module LAK⁃RMO4 through the asynchronous serial transceiver USART. The TCP/IP protocol stack is built in the module to realize data transmission and conversion among the user serial port,Ethernet and WIFI interface. Through programming of Android mobile phone applica⁃tion program,the user can achieve data transmission between AVR SCM and intelligent mobile phone in intelligent mobile phone,and realize setting and control of the whole system.

  8. 一种防跌倒预警系统的研究与实现%The Study and Realization of an Early Pre-impact Fall Alarm System

    Institute of Scientific and Technical Information of China (English)

    李慧奇; 梁丁; 宁运琨; 张静; 赵国如

    2014-01-01

    Falls are the second leading cause of unintentional injury deaths worldwide, so how to prevent falls has become a safety and security problem for elderly people. At present, because the sensing modules of most fall alarms generally only integrate the single 3-axis accelerometer, the measurement accuracy of sensing signals is limited. They can only achieve the alarm of post-fall detection but not the early pre-impact fall recognition in real fall applications. Therefore, an early pre-impact fall alarm system based on high-precision inertial sensing units was studied and developed in this paper. A multi-modality sensing module embedded with the fall detection algorithm was developed for the early pre-impact fall detection. The module included a 3-axis accelerometer, a 3-axis gyroscope and a 3-axis magnetometer, which could arouse early pre-impact fall warnings by a buzzer and a vibrator. Total 81 times of fall experiments from 9 healthy subjects were conducted in simulated fall conditions. The result shows that the detection sensitivity of the system combining the early warning threshold algorithm can reach 98.61%with a speciifcity of 98.61%, and the average pre-impact lead time is 300 ms. In the future, GPS, GSM electronic modules and wearable protected airbags will be embedded in the system, which will enhance real-time fall protections and timely treatments for the elderly people.%跌倒是造成世界上意外伤害死亡的第二大原因,如何预防跌倒已成为保障老人生命的关键。目前常见“跌倒报警器”的传感模块一般采用单一的三轴加速度计,测量精度受限,仅能实现人体跌倒后的报警功能而不能实现跌倒前的预警。文章设计并实现了一种基于 MEMS 惯性传感单元的防跌倒预警器,率先设计了含“三轴加速度计+三轴陀螺仪+三轴磁力计”的高精度多模态传感模块,内嵌跌倒预警算法,并通过蜂鸣器和振动器警示。对九名

  9. Design of a portable falling alarm system of old people based on Arduino MCU%基于Arduino单片机的便携式老年人跌倒报警系统设计

    Institute of Scientific and Technical Information of China (English)

    肖二宁; 张兴明; 李康士; 董永吉

    2016-01-01

    In order to satisfy the fall deterction of old people, a design scheme of fall monitoring system based on Arduino MCU is proposed. and the hardware and software design of the system is completed. The system consists of a portable device and a APP monitor, The portable device mainly includes 8-bits Arduino AVR MCU, the SIM900A chip which realizes the communication function and SMS alarm, the ADXL345 chip which realizes fall detection function, and the GPS NEO 6M WAVESHARE chip which realizes the positioning function. APP monitor is based on Android 4.4 and AutoNavi map package development, support domestic arbitrary locations show easy tracking view. Practical application and test results show that, the system has the advantages of simple operation, accurate positioning, fall alarm precision, meet the design requirements.%为了实现对老年人跌倒报警的需求,提出了一种基于Arduino单片机的跌倒报警系统设计方案,并完成系统的软硬件设计。该系统由便携式设备与监护APP组成,便携式设备主要包括完成数据处理的8位AVR单片机Arduino NANO、实现通信功能及短信报警的SIM900A芯片、实现跌倒检测功能的ADXL345芯片与实现定位功能的WAVE-SHARE GPS NEO 6M芯片。监护APP部分采用基于Android 4.4与高德地图包开发,支持国内任意地点显示,支持路径规划及语音播报。实际应用与测试结果表明,该系统具有操作简便、跌倒报警准确、定位精度高等特点,具有很强的实用价值和良好的市场前景。

  10. Safety assessment for electricity generation failure accident of gas cooled nuclear power plant using system dynamics (SD) method

    Energy Technology Data Exchange (ETDEWEB)

    Woo, Tae Ho [Seoul National Univ. (Korea, Republic of). Dept. of Nuclear Engineering

    2013-04-15

    The power production failure happens in the loss of coolant of the nuclear power plants (NPPs). The air ingress is a serious accident in gas cooled NPPs. The quantification of the study performed by the system dynamics (SD) method which is processed by the feedback algorithms. The Vensim software package is used for the simulation, which is performed by the Monte-Carlo method. Two kinds of considerations as the economic and safety properties are important in NPPs. The result shows the stability of the operation when the power can be decided. The maximum value of risk is the 11.77 in 43rd and the minimum value is 0.0 in several years. So, the success of the circulation of coolant is simulated by the dynamical values. (orig.)

  11. 基于HFACS的海上交通事故原因系统分析%Systemic analysis on cause of marine traffic accidents based on HFACS

    Institute of Scientific and Technical Information of China (English)

    张欣欣; 轩少永; 席永涛; 胡甚平

    2012-01-01

    为定量研究海上交通事故人失误致因因素,分析各种人失误因素对事故的影响程度,从而达到控制人失误事故的最终目的.在引入人的不安全行为分类框架和“人-机-环境”系统的基础上,运用人因素分析与分类系统(Human Factors Analysis and Classification System,HFACS),提出海上交通事故人失误分析与分类系统(Human Error Analysis and Classification System for Marine Traffic Accident,HEACS-MTA),对海上交通事故人失误因素进行分类.运用灰色关联分析法(Grey Relational Analysis,GRA)对事故形成原因进行定量分析,得出管理因素是事故的根本原因.导致事故发生的人失误因素依次为不安全行为的前提条件、不安全的监督、不安全行为和组织影响.%To research the causation factors of human errors in marine traffic accidents quantitatively, the influencing degree of the causation factors which lead to human errors is analyzed, so as to control accidents caused by human errors. On the base of introducing the classification framework of human' s unsafe behavior and the " man-machine-environment" system, the Human Factors Analysis and Classification System ( HFACS) is used and the Human Error Analysis and Classification System for Marine Traffic Accident (HEACS-MTA) is proposed to classify human errors in marine traffic accidents. The Grey Relational Analysis ( GRA) is used to analyze the accident causes quantitatively, and the conclusion is made that the management factor is the root cause of the accidents. The order of the main human error factors which lead to accident is precondition for unsafe acts, unsafe supervision, unsafe acts and organizational influences.

  12. Self-reported accidents

    DEFF Research Database (Denmark)

    Møller, Katrine Meltofte; Andersen, Camilla Sloth

    2016-01-01

    The main idea behind the self-reporting of accidents is to ask people about their traffic accidents and gain knowledge on these accidents without relying on the official records kept by police and/or hospitals.......The main idea behind the self-reporting of accidents is to ask people about their traffic accidents and gain knowledge on these accidents without relying on the official records kept by police and/or hospitals....

  13. 48 CFR 852.236-87 - Accident prevention.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 5 2010-10-01 2010-10-01 false Accident prevention. 852... Accident prevention. As prescribed in 836.513, insert the following clause: Accident Prevention (SEP 1993....236-13, Accident Prevention. However, only the Contracting Officer may issue an order to stop all...

  14. 46 CFR 108.627 - Carbon dioxide alarm.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Carbon dioxide alarm. 108.627 Section 108.627 Shipping... EQUIPMENT Equipment Markings and Instructions § 108.627 Carbon dioxide alarm. Each carbon dioxide alarm must be identified by marking: “WHEN ALARM SOUNDS VACATE AT ONCE. CARBON DIOXIDE BEING RELEASED” next...

  15. 46 CFR 196.37-9 - Carbon dioxide alarm.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Carbon dioxide alarm. 196.37-9 Section 196.37-9 Shipping... Markings for Fire and Emergency Equipment, etc. § 196.37-9 Carbon dioxide alarm. (a) All carbon dioxide alarms shall be conspicuously identified: “WHEN ALARM SOUNDS—VACATE AT ONCE. CARBON DIOXIDE...

  16. 46 CFR 78.47-9 - Carbon dioxide alarm.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Carbon dioxide alarm. 78.47-9 Section 78.47-9 Shipping... and Emergency Equipment, Etc. § 78.47-9 Carbon dioxide alarm. (a) All carbon dioxide alarms shall be conspicuously identified: “WHEN ALARM SOUNDS—VACATE AT ONCE. CARBON DIOXIDE BEING RELEASED.” (b)...

  17. 46 CFR 97.37-9 - Carbon dioxide alarm.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Carbon dioxide alarm. 97.37-9 Section 97.37-9 Shipping... Markings for Fire and Emergency Equipment, Etc. § 97.37-9 Carbon dioxide alarm. (a) All carbon dioxide alarms shall be conspicuously identified: “WHEN ALARM SOUNDS—VACATE AT ONCE. CARBON DIOXIDE...

  18. 46 CFR 162.050-35 - Bilge alarm: Approval tests.

    Science.gov (United States)

    2010-10-01

    ... mixture causing actuation of the alarm is taken. (2) If the alarm has a positive displacement mixture pump... mixture causing actuation of the alarm is taken. (3) If the alarm has a positive displacement mixture pump... centrifugal mixture pump or is not equipped with a mixture pump, the mixture flow rate is reduced to...

  19. 网络游戏服务器报警系统的设计与实现%The Design and Implementation of Alarm System for Online Game Server

    Institute of Scientific and Technical Information of China (English)

    江岸

    2013-01-01

    The online game server generally has great loading pressure, with the increase of game player, the server is growing in number of quantity. In order to manager the server system efficiently, and discover the problem of hardware or software promptly, this paper design an alarm system for game server, perfectly solved the problem of monitoring on the server, which has a great apply prospect.%网络游戏服务器一般都承受着较大的性能考验和负载压力,随着网络游戏玩家数量的增加,后台服务器数量也不断增多,为了高效的管理服务器,并及时发现服务器的硬件或者软件问题,该文设计了一套网络游戏服务器的报警系统,有效的解决了服务器的监控问题,具有较好的应用前景.

  20. Health and environment in Eastern Europe: an alarming diagnosis. Sante et environnement a l'Est: un diagnostic alarmant

    Energy Technology Data Exchange (ETDEWEB)

    Bonnefoy, X.

    1993-05-01

    Life-expectancy, infant and maternal mortality rates... the distance between East and West in increasing. Among the explanations: ways of life, systems of health care, socioeconomic situations or even historical fatality. But other factors can be pointed out: polluted air, water and soil - an environment whose deterioration is reason for alarm. International organizations have the job of making a diagnosis prior to any treatment.

  1. Renewal of the control terminals of the criticality alarm system of the factory; Renovacion de los terminales de control del sistema de alarma de criticidad de la fabrica

    Energy Technology Data Exchange (ETDEWEB)

    Escandon Ortiz, E.; Dorado Sierra, P.; Ortiz Trujillo, D.; Zurron Cifuentes, O.; Lopez Marquez, J.

    2011-07-01

    The new terminals to be installed are based on computer servers with eDNA management software and have the same features as the existing, but with the advantage of a greater dynamism and flexibility in obtaining and storage of historical data from the modules of acquisition of data (DAM) system.

  2. Behavioral alarm treatment for nocturnal enuresis

    Directory of Open Access Journals (Sweden)

    Rodrigo F. Pereira

    2010-06-01

    Full Text Available PURPOSES: To investigate the efficacy of alarm treatment in a sample of Brazilian children and adolescents with nocturnal enuresis and relate treatment success to age and type of clinical support. MATERIALS AND METHODS: During 32 weeks, 84 children and adolescents received alarm treatment together with weekly psychological support sessions for individual families or groups of 5 to 10 families. RESULTS: 71% of the participants achieved success, defined as 14 consecutive dry nights. The result was similar for children and adolescents and for individual or group support. The time until success was shorter for participants missing fewer support sessions. CONCLUSIONS: Alarm treatment was effective for the present sample, regardless of age or type of support. Missing a higher number of support sessions, which may reflect low motivation for treatment, increased the risk of failure.

  3. Fire detector setting problems discussion of code for design of automatic fire alarm systems%《火灾自动报警系统设计规范》探测器设置问题探讨

    Institute of Scientific and Technical Information of China (English)

    王赞瑞; 门茂琛; 薛原

    2011-01-01

    Based on quantitative and qualitative rules of smoke and temperature spreading along flat or sloping roof, new setting and fitting curve of point type fire detector were proposed, which was different from requirement of current code for design of automatic fire alarm systems. And, correction coefficient of radius of protection was demonstrated , wrong correction was%根据火灾时烟、温气流在平、坡屋顶上运行机理的量变、质变,提出了有别于现行的点型火灾探测器的设置限定、安装曲线及其绘制;论证了曾提出的保护半径修正系数,并分析了所见错误修正的后果和介绍点型探测器在平屋顶上的经济合理快捷设置法.

  4. 基于系统动力学的井喷事故仿真研究%Study on Simulation of Blowout Accidents Based on System Dynamics

    Institute of Scientific and Technical Information of China (English)

    吉安民; 何沙

    2011-01-01

    In order to forecast the development process of blowout accident dynamically, a system simulation flow chart for blowout accident was built combined with the relevant principles of System Dynamic and based on the analysis of blowout accident main influential factors. The System Dynamic simulation software Vensim was used to simulate the overall process of blowout accident. Monitoring and early warning of oil and gas wells dynamically were achieved. The research results indicate that the blowout accident is caused by the cross-coupling functions of human factors, management factors, environmental factors, equipment factors, and laws and regulations factors.%为动态预测井喷事故发展过程,在分析导致井喷事故主要因素的基础上,结合系统动力学的相关原理,构建井喷事故系统仿真流图,并运用系统动力学仿真软件Vensim对井喷事故的整体流程进行仿真,实现了对油气井安全水平的动态监测和预警.结果表明:井喷事故的发生是由人为因素、管理因素、环境因素、设备因素和法律法规因素四大子系统的交叉耦合作用而导致整个油气井系统的安全水平低于井喷事故的安全临界点所造成的.

  5. Poison and alarm: the Asian hornet Vespa velutina uses sting venom volatiles as an alarm pheromone.

    Science.gov (United States)

    Cheng, Ya-Nan; Wen, Ping; Dong, Shi-Hao; Tan, Ken; Nieh, James C

    2017-02-15

    In colonial organisms, alarm pheromones can provide a key fitness advantage by enhancing colony defence and warning of danger. Learning which species use alarm pheromone and the key compounds involved therefore enhances our understanding of how this important signal has evolved. However, our knowledge of alarm pheromones is more limited in the social wasps and hornets compared with the social bees and ants. Vespa velutina is an economically important and widespread hornet predator that attacks honey bees and humans. This species is native to Asia and has now invaded Europe. Despite growing interest in V. velutina, it was unknown whether it possessed an alarm pheromone. We show that these hornets use sting venom as an alarm pheromone. Sting venom volatiles were strongly attractive to hornet workers and triggered attacks. Two major venom fractions, consisting of monoketones and diketones, also elicited attack. We used gas chromatography coupled to electroantennographic detection (GC-EAD) to isolate 13 known and 3 unknown aliphatic ketones and alcohols in venom that elicited conspicuous hornet antennal activity. Two of the unknown compounds may be an undecen-2-one and an undecene-2,10-dinone. Three major compounds (heptan-2-one, nonan-2-one and undecan-2-one) triggered attacks, but only nonan-2-one did so at biologically relevant levels (10 hornet equivalents). Nonan-2-one thus deserves particular attention. However, the key alarm releasers for V. velutina remain to be identified. Such identification will help to illuminate the evolution and function of alarm compounds in hornets.

  6. The Fire Alarm System of Wind Turbine Engine Room Based on ZigBee%基于ZigBee的风电机舱火灾预警系统设计

    Institute of Scientific and Technical Information of China (English)

    邬春明; 杨涛; 张金强

    2016-01-01

    In order to solve the loss of fire hidden trouble in the wind turbine,we designed a fire alarm system of wind turbine engine based on ZigBee. The system consists of the collection nodes,the coordination node and the monitoring center node. We use CC2530 as the processor,which controls the location of the fire hidden trouble in wind turbine engine room,collecting the data through the data collection nodes and sending them to monitoring cen⁃ter by GPRS network. According to the experiment and test results,the system can work stability,high reliability, early warning accuracy and monitoring of the regional operations of each time period effectiveness ,thus it can guar⁃antee the wind turbine running security and stability.%为了解决风电机组中火灾隐患带来的损失,提出了基于ZigBee的风电机舱的火灾预警系统。系统由传感器采集节点、网络协调节点,以及监控中心节点组成。采用CC2530作为处理器来控制传感器采集风机舱内主要的火灾隐患位置,在协调节点汇聚,通过GPRS网络传送到远处监控中心。通过实验和测试,系统运行稳定,可靠性高,预警准确,能够有效的监测各区域的各个时间段的运行情况,从而能够保证风电机组安全、稳定的运行。

  7. Survey/research on application of expert system to electric power technology. Part 1. ; Protoypical preparation of accident section discrimination system by personal computer edition. Expert system no denryoku gijutsu eno tekiyo ni kansuru chosater dot kenkyu (1). ; Keito jiko kukan hantei system (pasokon ban) no shisaku

    Energy Technology Data Exchange (ETDEWEB)

    Sugihara, H. (The Chugoku Electric Power Co. Inc., Hiroshima (Japan))

    1991-03-20

    As the first step in the prototypical preparation of system accident recovery support system'', in order to support the accident phenomenon comprehension and recovery operation, to be done by the operators at the time of accident occurrence in the electric power system, accident section discrimination system by personal computer edition'' was prototypically prepared for the purpose of discussing the knowledge expression and inference method. That system is, at the time of system accident occurrence, to discriminate the accident section from the information of operated protective relay and tripped circuit breaker, and was structured of objective system model and about 100 production rules (knowledge under a form of if {yields} then''). As the rule was made not to depend upon a proper system, change in system structure and protection system can be corresponded to by change in objective system model only. Correct conclusion was obtained in 1 to 10 minutes, as a result of demonstration, made in about 50 cases of supposed accident, using a control system (12 buses, 2 power source buses, 12 power transmission circuits and 26 circuit breakers), based on the system in Takehara control station. 9 refs., 25 figs., 2 tabs.

  8. APT Blanket System Loss-of-Coolant Accident (LOCA) Based on Initial Conceptual Design - Case 1: External HR Break Near Inlet Header

    Energy Technology Data Exchange (ETDEWEB)

    Hamm, L.L.

    1998-10-07

    The APT blanket system has about 57 MW of thermal energy deposited within the blanket region under normal operating conditions from the release of neutrons and the interaction of the High energy particles with the blanket materials. This corresponds to about 48 percent of total thermal energy deposited in the APT target/blanket system. The deposited thermal energy under normal operation conditions is an important input parameter used in the thermal-hydraulic design and accident analysis.

  9. Mianserin affects alarm reaction to conspecific chemical alarm cues in Nile tilapia.

    Science.gov (United States)

    Barreto, Rodrigo Egydio

    2017-02-01

    In this study, I show that mianserin, a chemical with serotonin and adrenoceptor antagonist activities, increases fish vulnerability to a potential predator threat, when prey fish must deal with this threat based on conspecific chemical alarm cues. For that, I evaluated whether mianserin, diluted in the water, influences the behavioral responses of Nile tilapia (Oreochromis niloticus) to conspecific skin extract (chemical alarm cues). I found that, while mianserin did not abolished antipredator responses, this drug mitigates some components of this defensive reaction. Thus, a potential decrease in serotonin and adrenergic activities reduces the ability of dealing with predators when perceiving conspecific chemical alarm cues.

  10. 46 CFR 63.15-7 - Alarms.

    Science.gov (United States)

    2010-10-01

    ... reset. (c) For steam boilers, operation of the lower low water cutoff must automatically sound an..., DEPARTMENT OF HOMELAND SECURITY (CONTINUED) MARINE ENGINEERING AUTOMATIC AUXILIARY BOILERS General... periodically unattended machinery space, the auxiliary boiler trip alarm required by 46 CFR 62.35-50, Table...

  11. A Review of Accident Modelling Approaches for Complex Critical Sociotechnical Systems

    Science.gov (United States)

    2008-01-01

    integrated model has been demonstrated by analysing the failure in the Therac -25 sociotechnical system. THERAC -25 was an X-ray treatment machine...Baxter (2003) developed a three-layer model for the THERAC -25 system: the regulation authorities, the company who developed the system, and the...FailureFault Error FailureFault Error Failure THERAC -25 FAILURE DESIGN and CERTIFICATION Programmer Company Regulation Authorities Figure 7: Integrating

  12. Incidence of Cancer: Alarming Numbers

    Directory of Open Access Journals (Sweden)

    Annia Lourdes Iglesias Armenteros

    2015-03-01

    Full Text Available Cancer is an important health problem worldwide. It affects all of the countries, independently of the race, culture, level of economical development and political system. Around 10 million of new cases of cancer are detected every year. At present approximately 50 000 women died because of this disease.

  13. Development of computer-controlled ultrasonic image processing system for severe accidents research

    Energy Technology Data Exchange (ETDEWEB)

    Koo, Kil Mo; Kang, Kyung Ho; Kim, Jong Tai; Kim, Jong Whan; Cho, Young Ro; Ha, Kwang Soon; Park, Rae Jun; Kim, Sang Baik; Kim, Hee Dong; Sim, Chul Moo

    2000-07-01

    In order to verify in-vessel corium cooling mechanism, LAVA(Lower-plenum Arrested Vessel Attack) experiment is being performed as a first stage proof of principle test. The aims of this study are to find a gap formation between corium melt and reactor lower head vessel, to verify the principle of the gap formation and to analyze the effect of the gap formation on the thermal behavior of corium melt and the lower plenum. This report aims at developing a computer controlled image signal processing system which is able to improve visualization and to measure the gap distribution with 3-dimensional planar image using a time domain signal analysis method as a part of the ultrasonic pulse echo methods and a computerized position control system. An image signal processing system is developed by independently developing an ultrasonic image signal processing technique and a PC controlled position control system and then combining both systems.

  14. PF-4 simulated fire accident analysis: Filter-spray cool-down system reevaluation implications

    Energy Technology Data Exchange (ETDEWEB)

    White, B.W.; Gregory, W.S.

    1990-10-01

    The Los Alamos National Laboratory PF-4 facility was designed with spray cool down systems within the building's ventilation systems. The Engineering and Safety Analysis Group was asked, in cooperation with ENG-8 and MST-8, to evaluate whether the spray cool-down system still need to be classified as safety class'' systems. The study was performed using the FIRAC computer code. Given the fire source terms (hypothetical fire energy or time-temperature history), FIRAC can predict the pertinent transient flow parameters (pressures, flows, and temperatures) throughout a previously defined and selected fire zone. A computer model for the study that had all of the main ventilation systems in the south half of the PF-4 facility was used. Because the most hazardous room is located in the 400 Section, all ventilation systems but the 400 Section's one were simplified. The impetus for simplification was to keep the computer model tractable, and this was possible with the following assumptions: the fire cannot spread from one room to another, all corridor connecting doors are closed and will not fail under the pressures generated by the fire, and the principal pathway for potential release is the ventilation system. All of the blowers continue to operate, and all fire retardant systems fail to operate during the fire. The ASTM time-temperature curve was the source for the burn-room temperature, and smoke injection was used as input as well. Five different computer runs were made using different combinations of source terms and heat transfer. A connection from the burn room to the glovebox ventilation system was created by burning the glovebox plastic shielding; it was modeled by a branch having an initial flow 75 ft{sup 3}/min. 7 refs., 35 refs., 15 tabs.

  15. Perspectives on use of personal alarms by older fallers

    Directory of Open Access Journals (Sweden)

    Kylie Johnston

    2010-08-01

    Full Text Available Kylie Johnston1, Karen Grimmer-Somers1, Michele Sutherland21International Centre for Allied Health Evidence, University of South Australia, Adelaide; 2Falls Prevention Unit, Department of Health, Government of South Australia, Adelaide, AustraliaBackground: Personal alarms are proposed as a reliable mechanism for older people to obtain assistance after falling. However, little is known about how older people feel about owning and using personal alarms.Aim: This paper reports on experiences of independently living older people, who have recently fallen, regarding alarm use and their independence.Method: Volunteers older than 65 years who had sustained a fall in the previous six months were sought via community invitations. Semistructured telephone interviews were conducted to gain information about their fall and their perspectives on personal alarm use. Interviews were content-analyzed to identify key concepts and themes.Results: Thirty-one interviews were conducted. Twenty callers owned personal alarms. Four subgroups of older fallers were identified; the first group used personal alarms effectively and were advocates for their benefits, the second group owned an alarm but did not use it effectively, the third group did not own alarms mostly because of cost, although were receptive to an alarm should one be provided, and the fourth group did not have an alarm and would not use it even if it was provided.Discussion: Personal alarms produce positive experiences when used effectively by the right people. The cost of personal alarms prohibits some older fallers from being effective alarm users. However, other elderly fallers remain unwilling to consider alarm use even if one was provided. In view of their cost, personal alarms should be targeted to people who will benefit most. ­Alternative strategies should be considered when alarms are unlikely to be used appropriately.Keywords: personal alarm devices, falls, older people, patient perspective

  16. Severe accident analysis using dynamic accident progression event trees

    Science.gov (United States)

    Hakobyan, Aram P.

    In present, the development and analysis of Accident Progression Event Trees (APETs) are performed in a manner that is computationally time consuming, difficult to reproduce and also can be phenomenologically inconsistent. One of the principal deficiencies lies in the static nature of conventional APETs. In the conventional event tree techniques, the sequence of events is pre-determined in a fixed order based on the expert judgments. The main objective of this PhD dissertation was to develop a software tool (ADAPT) for automated APET generation using the concept of dynamic event trees. As implied by the name, in dynamic event trees the order and timing of events are determined by the progression of the accident. The tool determines the branching times from a severe accident analysis code based on user specified criteria for branching. It assigns user specified probabilities to every branch, tracks the total branch probability, and truncates branches based on the given pruning/truncation rules to avoid an unmanageable number of scenarios. The function of a dynamic APET developed includes prediction of the conditions, timing, and location of containment failure or bypass leading to the release of radioactive material, and calculation of probabilities of those failures. Thus, scenarios that can potentially lead to early containment failure or bypass, such as through accident induced failure of steam generator tubes, are of particular interest. Also, the work is focused on treatment of uncertainties in severe accident phenomena such as creep rupture of major RCS components, hydrogen burn, containment failure, timing of power recovery, etc. Although the ADAPT methodology (Analysis of Dynamic Accident Progression Trees) could be applied to any severe accident analysis code, in this dissertation the approach is demonstrated by applying it to the MELCOR code [1]. A case study is presented involving station blackout with the loss of auxiliary feedwater system for a

  17. 48 CFR 36.513 - Accident prevention.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 1 2010-10-01 2010-10-01 false Accident prevention. 36.513 Section 36.513 Federal Acquisition Regulations System FEDERAL ACQUISITION REGULATION SPECIAL... prevention. (a) The contracting officer shall insert the clause at 52.236-13, Accident Prevention,...

  18. Research and Design of Streaming Media System for City Monitoring and Alarming Networking Platform%城市监控报警联网平台流媒体系统研究与设计

    Institute of Scientific and Technical Information of China (English)

    孟卿卿; 王建勇

    2016-01-01

    为解决大范围监控视频联网过程中面临的不同丢包率、网络类型及系统带宽等复杂网络环境问题,参照GB/T 28181国家标准及相关行业标准,提出一套基于会话初始协议及实时传输协议的城市监控报警联网平台流媒体系统协议框架,并以该协议框架为基础,设计一套城市监控报警联网平台流媒体系统的实现方案。该方案基于中心流媒体服务器及云存储技术,支持多级跨域大规模媒体互联和媒体数据高效集中存储及分发。应用结果表明,该方案的单域实时视频点播响应时间可控制在2 s以内,且能够有效适应丢包率高达30%的网络环境,具有较好的通用性、稳定性及适应性,能够满足安防一线监控视频联网要求。%In order to solve the complex network problems in the process of large-scale monitoring video interconnection,such as different packet loss rate,network types and system bandwidth,according to GB/T 28181 national standard and related industry standards,a streaming media protocol framework for the city monitoring and alarming networking platform is proposed,which is based on Session Initiation Protocol(SIP)and Real-time Transport Protocol(RTP).On the basis of this proposed protocol framework,a streaming media system implementation scheme for the city monitoring and alarming networking platform is designed.Based on the central streaming media server and cloud storage technology,this scheme supports wide range multi-level and cross-domain media interconnection as well as efficient and centralized media data storage and distribution.Practical application proves that the proposed scheme is able to reduce the response time of single-domain real-time video request to less than 2 s,and effectively adapt to the network environment whose loss rate is up to 30%.It is better at universality,stability and adaptability,and is able to meet the requirements of public security video

  19. Analysis of the Positive Pathogenic Bacteria and the Alarm Time by Automated Blood Culture System%全自动血培养仪阳性病原菌种类及报警时间分析

    Institute of Scientific and Technical Information of China (English)

    廖忠; 叶杰; 陈振南

    2013-01-01

    Objective:To analyse the positive pathogenic bacteria of the blood culture and the alarm time.Method:A total of 2180 blood specimens were collected from April 2010 to April 2012 in our hospital and the specimens were detected by BD BACTEC 9120 automated blood culture system.Analyse the bacterial species and alarm time of the blood specimens in aerobic and anaerobic bottles.Result:282 blood culture positive samples were isolated from the 2180 blood culture samples,which was true positive in 263 cases.The positive rate of the blood culture was 12.1%,which 269 strains of pathogens were isolated,including Gram-positive cocci accounted for 40.1%,gram negative bacilli 57.2%,fungi 2.6%.However the positive rate was just 15.6% only from aerobic bottles and 5.7% only from anaerobic ones,and 20.9% from both of the two bottles.The fastest positive time was 5.02 h, during the test,the number of positive reactions accounted for 69.1% in 24 hours,92.5% in 48 hours,and 97% in 72 hours.The false positive rate was 0.87%, and the false negative rate was 0.52%.Conclusion:Application of both aerobic and anaerobic cultivation detected by BD BACTEC 9120 automated blood culture system can improve the blood culture positive rate,shorten the positive detection time.%  目的:分析血培养阳性病原菌种类及仪器报警时间.方法:用 BD BACTEC 9120全自动血培养仪检测笔者所在医院2010年4月-2012年4月共计2180份血标本,分析血标本在需氧瓶和厌氧瓶中生长细菌的种类及仪器报警时间.结果:2180例血培养标本中报警阳性282例,其中真阳性263例,阳性率为12.1%.分离出细菌269株,其中革兰阳性球菌占40.1%,革兰阴性杆菌占57.2%,真菌占2.6%.其中仅需氧瓶报阳的阳性率为6.3%,仅厌氧瓶报阳的阳性率为2.8%,需氧瓶及厌氧瓶均报阳的阳性率为2.9%;最快阳性检出时间为5.02 h,24 h内检出的阳性数占69.1%,48 h 检出的阳性数占92.5%,72 h 检出的阳性数占97.0%

  20. Radiation Measurement Systems and Experiences in Japan after the Fukushima Accident

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2015-07-01

    In the approximately 4 years since the March 2011 earthquake and subsequent Tsunami damaged the three Dai-Ichi nuclear power plants, the AREVA and Canberra team have deployed a variety of different radiation measurement machines in Japan. These measurement projects or instruments include: - Dose-rate mapping of the close-in areas on the damaged reactor site using the stored output of dose rate meters carried by workers planning for the installing of a water processing unit; - Spectroscopic on-line measurements of the first water processing unit on the site, where these nuclide-specific measurements at multiple points allowed remote users to determine the optimum processing parameters - General purpose food measurement units, both high precision HPGe systems and low cost NaI systems, which were used throughout the country for food quality measurements; - In-vivo measurement systems, both fixed and mobile whole body counting units, that were used on at least 500,000 people, demonstrating to them that internal doses were very low; - In-vivo measurements with special high-sensitivity whole body counters on babies and children, demonstrating to the parents of these children that internal doses are very low; - Automatic systems for high throughput assay of bags of rice that are part of the consumer confidence plan to prove to customers that Fukushima Prefecture rice is safe; - High sensitivity automatic system to assay boxes of special semi-dry persimmons and to report the activity of each individual item within the box meets the regulatory limit; - System to assay soil on a conveyor belt and sort the output according to level of radioactivity, which would then reduce the volume of material that must be treated as radioactive; - System to assay a truck loaded with 1 cubic meter sacks of soil and vegetation, and report the results of each individual sack. - On-line water measurement system for SrY90 at levels that are suitable for release to the environment; - Mobile

  1. Risk-based modeling of early warning systems for pollution accidents.

    Science.gov (United States)

    Grayman, W M; Males, R M

    2002-01-01

    An early warning system is a mechanism for detecting, characterizing and providing notification of a source water contamination event (spill event) in order to mitigate the impact of contamination. Spill events are highly probabilistic occurrences with major spills, which can have very significant impacts on raw water sources of drinking water, being relatively rare. A systematic method for designing and operating early warning systems that considers the highly variable, probabilistic nature of many aspects of the system is described. The methodology accounts for the probability of spills, behavior of monitoring equipment, variable hydrology, and the probability of obtaining information about spills independent of a monitoring system. Spill Risk, a risk-based model using Monte Carlo simulation techniques has been developed and its utility has been demonstrated as part of an AWWA Research Foundation sponsored project. The model has been applied to several hypothetical river situations and to an actual section of the Ohio River. Additionally, the model has been systematically applied to a wide range of conditions in order to develop general guidance on design of early warning systems.

  2. 基于C8051F020的智能红外报警系统设计%The design of intelligent infrared alarm system based on C8051F020

    Institute of Scientific and Technical Information of China (English)

    熊杰

    2014-01-01

    We used C8051f020 as the key controlling component of single chip microcomputer(SCM),pyroelectric infra-red sensor module DYP-ME003 as the front-end detector,through SPI protocol model of ISD1700 voice chip for accurate control of audio playback function,realized voice doorbell recording,playback,alarm recording,broadcasting,etc.If someone rashly enters the house monitored,the monitor will instruct GSM module which is preset with proper informa-tion to send the emergent message to the owner’s mobile phone and report the incident to the police as well.The test re-sults show that this system can repreduce the voice effects,and work stably,reliably.%以C8051f020单片机作为控制核心,采用热释电红外传感器模块 DYP-ME003作为前端探测器,通过SPI 协议模式对语音芯片 ISD1700进行语音录放功能的精确操控,实现语音门铃录音、播放,报警声录音、播放等。若有人入侵,则通过单片机控制 GSM 模块按照设置好的号码及信息发送到主人的手机上,达到报警目的。测试结果表明,该系统能真实再现语音效果,运行稳定、可靠。

  3. JLAB Web Based Tracking System for Integrated Incident, Accident, Inspection, and Assessments

    Energy Technology Data Exchange (ETDEWEB)

    S. Prior; R. Lawrence

    2003-09-01

    The Thomas Jefferson National Accelerator Facility, or JLab, is a Department of Energy particle accelerator used to conduct fundamental physics research. In such a facility there are numerous statutory, regulatory, contractual, and best practice requirements for managing and analyzing environmental health and safety (EH&S) related data. A tracking system has been developed at JLab that meets the needs of all levels of the organization, from the front line worker to the most senior management. This paper describes the system implementation and performance to date.

  4. A cross-scale numerical modeling system for management support of oil spill accidents.

    Science.gov (United States)

    Azevedo, Alberto; Oliveira, Anabela; Fortunato, André B; Zhang, Joseph; Baptista, António M

    2014-03-15

    A flexible 2D/3D oil spill modeling system addressing the distinct nature of the surface and water column fluids, major oil weathering and improved retention/reposition processes in coastal zones is presented. The system integrates hydrodynamic, transport and oil weathering modules, which can be combined to offer different-complexity descriptions as required by applications across the river-to-ocean continuum. Features include accounting for different composition and reology in the surface and water column mixtures, as well as spreading, evaporation, water-in-oil emulsification, shoreline retention, dispersion and dissolution. The use of unstructured grids provides flexibility and efficiency in handling spills in complex geometries and across scales. The use of high-order Eulerian-Lagrangian methods allows for computational efficiency and for handling key processes in ways consistent with their distinct mathematical nature and time scales. The modeling system is tested through a suite of synthetic, laboratory and realistic-domain benchmarks, which demonstrate robust handling of key processes and of 2D/3D couplings. The application of the modeling system to a spill scenario at the entrance of a port in a coastal lagoon illustrates the power of the approach to represent spills that occur in coastal regions with complex boundaries and bathymetry.

  5. Design of Fire Auto-alarm and Control System of the Container Tower for the Second-phase Project of Shanghai Waigaoqiao Port Area%上海外高桥港区二期工程集装箱调度中心火灾报警系统设计介绍

    Institute of Scientific and Technical Information of China (English)

    郭力清

    2000-01-01

    简要介绍上海外高桥港区二期工程集装箱调度中心火灾报警系统的设计及体会。%It briefly introduces design and understandings of the fire auto-alarm and control system of the Container Tower for the 2nd-phase Project of Shanghai Waigaoqiao Port Area.

  6. 21 CFR 870.1100 - Blood pressure alarm.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Blood pressure alarm. 870.1100 Section 870.1100...) MEDICAL DEVICES CARDIOVASCULAR DEVICES Cardiovascular Diagnostic Devices § 870.1100 Blood pressure alarm. (a) Identification. A blood pressure alarm is a device that accepts the signal from a blood...

  7. 46 CFR 108.623 - General alarm bell switch.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false General alarm bell switch. 108.623 Section 108.623... AND EQUIPMENT Equipment Markings and Instructions § 108.623 General alarm bell switch. Each general alarm bell switch must be marked “GENERAL ALARM” on a plate or other firm noncorrosive backing....

  8. 33 CFR 157.440 - Autopilot alarm or indicator.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Autopilot alarm or indicator. 157... § 157.440 Autopilot alarm or indicator. (a) A tankship owner or operator shall ensure that each installed autopilot unit without automatic manual override has an audible and visual alarm, which...

  9. Research and implementation of intelligent alarm transceiver

    Institute of Scientific and Technical Information of China (English)

    Haobo long; XiaolingTian

    2015-01-01

    To design and implement a inteligent alarm transceiver, the sensor, such as temperature, voltage, video check. is used in transceiver. Then it analyses real-time acquisition data of sensor, if the transceiver is not working normaly, and the results are sent to the host computer. And the latter send fault information to user by mobile phone. During this period, without artificial participation, to achieve the purpose of inteligent warning. it can improve the maintenance efficiency of transceiver.

  10. Alarm annunciation in a graphical environment

    Energy Technology Data Exchange (ETDEWEB)

    Adams, D.G.

    1994-08-01

    Well-designed graphical user interfaces, such as Microsoft Windows{trademark} or UNIX{trademark} -- based X-Windows, provide a capability for enhanced display of security alarm information. Conversely, a poorly designed interface can quickly overwhelm an operator. This paper describes types of graphical information that can be displayed and offers guidance on how to best display that information. Limits are proposed for the complexity of the user interface, and guidelines are suggested for the display of maps and sensors.

  11. Key Characteristics of Combined Accident including TLOFW accident for PSA Modeling

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Bo Gyung; Kang, Hyun Gook [KAIST, Daejeon (Korea, Republic of); Yoon, Ho Joon [Khalifa University of Science, Technology and Research, Abu Dhabi (United Arab Emirates)

    2015-05-15

    The conventional PSA techniques cannot adequately evaluate all events. The conventional PSA models usually focus on single internal events such as DBAs, the external hazards such as fire, seismic. However, the Fukushima accident of Japan in 2011 reveals that very rare event is necessary to be considered in the PSA model to prevent the radioactive release to environment caused by poor treatment based on lack of the information, and to improve the emergency operation procedure. Especially, the results from PSA can be used to decision making for regulators. Moreover, designers can consider the weakness of plant safety based on the quantified results and understand accident sequence based on human actions and system availability. This study is for PSA modeling of combined accidents including total loss of feedwater (TLOFW) accident. The TLOFW accident is a representative accident involving the failure of cooling through secondary side. If the amount of heat transfer is not enough due to the failure of secondary side, the heat will be accumulated to the primary side by continuous core decay heat. Transients with loss of feedwater include total loss of feedwater accident, loss of condenser vacuum accident, and closure of all MSIVs. When residual heat removal by the secondary side is terminated, the safety injection into the RCS with direct primary depressurization would provide alternative heat removal. This operation is called feed and bleed (F and B) operation. Combined accidents including TLOFW accident are very rare event and partially considered in conventional PSA model. Since the necessity of F and B operation is related to plant conditions, the PSA modeling for combined accidents including TLOFW accident is necessary to identify the design and operational vulnerabilities.The PSA is significant to assess the risk of NPPs, and to identify the design and operational vulnerabilities. Even though the combined accident is very rare event, the consequence of combined

  12. 48 CFR 52.236-13 - Accident Prevention.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 2 2010-10-01 2010-10-01 false Accident Prevention. 52.236-13 Section 52.236-13 Federal Acquisition Regulations System FEDERAL ACQUISITION REGULATION....236-13 Accident Prevention. As prescribed in 36.513, insert the following clause: Accident...

  13. EUROCONTROL-Systemic Occurrence Analysis Methodology (SOAM)-A 'Reason'-based organisational methodology for analysing incidents and accidents

    Energy Technology Data Exchange (ETDEWEB)

    Licu, Tony [EUROCONTROL-European Organization for the Safety of Air Navigation and Dedale Asia Pacific, Safety Team, Rue de la Fusee, 96, 1130 Brussels (Belgium)]. E-mail: antonio.licu@eurocontrol.int; Cioran, Florin [EUROCONTROL-European Organization for the Safety of Air Navigation and Dedale Asia Pacific, Safety Team, Rue de la Fusee, 96, 1130 Brussels (Belgium)]. E-mail: florin.cioran@eurocontrol.int; Hayward, Brent [EUROCONTROL-European Organization for the Safety of Air Navigation and Dedale Asia Pacific, Safety Team, Rue de la Fusee, 96, 1130 Brussels (Belgium)]. E-mail: bhayward@dedale.net; Lowe, Andrew [EUROCONTROL-European Organization for the Safety of Air Navigation and Dedale Asia Pacific, Safety Team, Rue de la Fusee, 96, 1130 Brussels (Belgium)]. E-mail: alowe@dedale.net

    2007-09-15

    The Safety Occurrence Analysis Methodology (SOAM) developed for EUROCONTROL is an accident investigation methodology based on the Reason Model of organisational accidents. The purpose of a SOAM is to broaden the focus of an investigation from human involvement issues, also known as 'active failures of operational personnel' under Reason's original model, to include analysis of the latent conditions deeper within the organisation that set the context for the event. Such an approach is consistent with the tenets of Just Culture in which people are encouraged to provide full and open information about how incidents occurred, and are not penalised for errors. A truly systemic approach is not simply a means of transferring responsibility for a safety occurrence from front-line employees to senior managers. A consistent philosophy must be applied, where the investigation process seeks to correct deficiencies wherever they may be found, without attempting to apportion blame or liability.

  14. INSTALLATION OF A POST-ACCIDENT CONFINEMENT HIGH-LEVEL RADIATION MONITORING SYSTEM IN THE KOLA NUCLEAR POWER STATION (UNIT 2) IN RUSSIA

    Energy Technology Data Exchange (ETDEWEB)

    GREENE,G.A.; GUPPY,J.G.

    1998-09-01

    This is the final report on the INSP project entitled, ``Post-Accident Confinement High-Level Radiation Monitoring System'' conducted by BNL under the authorization of Project Work Plan WBS 1.2.2.6 (Attachment 1). This project was initiated in February 1993 to assist the Russians in reducing risks associated with the continued operation of older Soviet-designed nuclear power plants, specifically the Kola VVER-440/230 Unit 2, through improved accident detection capability, specifically by the installation of a dual train high-level radiation detection system in the confinement of Unit 2 of the Kola NPP. The major technical objective of this project was to provide, install and make operational the necessary hardware inside the confinement of the Kola NPP Unit 2 to provide early and reliable warning of the release of radionuclides from the reactor into the confinement air space as an indication of the occurrence of a severe accident at the plant. In addition, it was intended to provide hands-on experience and training to the Russian plant workers in the installation, operation, calibration and maintenance of the equipment in order that they may use the equipment without continued US assistance as an effective measure to improve reactor safety at the plant.

  15. Communication Pattern Regarding Alarms and Patient Signals Between Nurses, Other Health Care Actors, Patients and Devices.

    Science.gov (United States)

    Solvoll, Terje; Hanenburg, Adrienne; Giordanego, Alain; Hartvigsen, Gunnar

    2015-01-01

    CallMeSmart is a context aware communication system for hospitals. The system is being used by nurses and the physicians at the Oncology department, University Hospital of North Norway. CallMeSmart has been designed to increase the efficiency of communication between the nurse-physician and physician-physician. In this study, we have looked at the communication pathways between nurse-nurse and patient-nurse: how nurses define a preference of calling somebody, how alarms and tasks are prioritized, and how this could be implemented into the CallMeSmart system to improve the system for the nurses. This paper discusses how the communication pathways of the patient alarm system can be improved for health care actors in hospitals by revealing the communication patterns according to an alarm between those actors. We address the communication pattern between nurses, other health care actors, patients and the devices used, and discuss possible improvements of this communication.

  16. A study on the effect of containment filtered venting system to off-site under severe accident

    Energy Technology Data Exchange (ETDEWEB)

    Jeon, Ju Young; Kwon, Tae Eun; Lee, Jai Ki [Hanyang University, Seoul (Korea, Republic of)

    2015-12-15

    The containment filtered venting system reduces the range of the contamination area around the nuclear power plant by strengthening the integrity of the containment building. In this study, the probabilistic assessment code MACCS2 was used to assess the effect of the CFVS to off-site. The accident source term was selected from a Probabilistic Safety Analysis report of SHINKORI 1 and 2 Nuclear Power Plant. The three source term categories from 19 STC were chosen to evaluate the effective dose and thyroid dose of residents around the power plant and the dose with CFVS and without CFVS were compared. The dose was calculated according to the distance from the nuclear power plant, so the damage scale based on the distance that exceeds the IAEA criteria for effective dose (100 mSv per 7 days) and thyroid dose (50 mSv per 7 days) were compared. The effective dose reduction rates of the STC-3, STC-4, STC-6 were about 95-99% in the whole range (0⁓35 km), 96-98% for the thyroid dose. There are similar results between effective dose and thyroid dose. After applying the CFVS, the damage scale that exceeds the effective dose criteria was about 1 km (mean). Especially, the STC-4 damage scale was decreased from 26 km (mean) to 1.2 km (mean) significantly. The damage scale that exceed the thyroid dose criteria was decreased to 2⁓3 km (mean). The STC-4 damage scale was also decreased significantly as compared to STC-3, STC-6 in terms of effective dose.

  17. Chair alarm for patient fall prevention based on gesture recognition and interactivity.

    Science.gov (United States)

    Knight, Heather; Lee, Jae-Kyu; Ma, Hongshen

    2008-01-01

    The Gesture Recognition Interactive Technology (GRiT) Chair Alarm aims to prevent patient falls from chairs and wheelchairs by recognizing the gesture of a patient attempting to stand. Patient falls are one of the greatest causes of injury in hospitals. Current chair and bed exit alarm systems are inadequate because of insufficient notification, high false-alarm rate, and long trigger delays. The GRiT chair alarm uses an array of capacitive proximity sensors and pressure sensors to create a map of the patient's sitting position, which is then processed using gesture recognition algorithms to determine when a patient is attempting to stand and to alarm the care providers. This system also uses a range of voice and light feedback to encourage the patient to remain seated and/or to make use of the system's integrated nurse-call function. This system can be seamlessly integrated into existing hospital WiFi networks to send notifications and approximate patient location through existing nurse call systems.

  18. A preview of the efficiency of systemic family therapy in treatment of children with posttraumatic stress disorder developed after car accident

    Directory of Open Access Journals (Sweden)

    Stanković Miodrag

    2013-01-01

    Full Text Available Background/Aim. Traumatic stress refers to physical and emotional reactions caused by events which represent a life threat or a disturbance of physical and phychological integrity of a child, as well as their parents or gaerdians. Car accidents are the main cause of posttraumatic stress disorder (PTSD in children. The aim of this study was to preview clinical efficiency of systemic family therapy (SFT as therapy intervention in treatment of children with posttraumatic stress disorder (PTSD traumatized in car accident under identical circumstances of exposure. We pointed out the importance of specific family factors (family cohesion and adaptability, emotional reaction of the parents on PTSD clinical outcome. Methods. The sample of this clinical observational study included 7-sixth grade pupiles - 5 boys and 2 girls, aged 13. All of the pupils were involved in car accident with one death. Two groups were formed - one group included three children who were involved in 8 SFT sessions together with their families. The second group included 4 children who received an antidepressant sertraline in the period of three months. Results. Two months after the car accident, before the beginning of the therapy, all of the children were the members of rigidly enmeshed family systems, considering the high average cohesion scores and the low average adaptability scores on the FACES III. Three months after the received therapy, having evaluated the results of the therapeutic approaches, we established that the adaptability scores of the families included in the SFT were higher than the scores of the families of the children who received pharmacotherapy with one boy still meeting the criteria for PTSD. Conclusion. Systemic family therapy was efficient in the treatment of children with PTSD, traumatized in car accident. Therapy efficiency was higher when both parents and children were included in SFT than in the case when they were not included in the family

  19. Nuclear accident dosimetry intercomparison studies.

    Science.gov (United States)

    Sims, C S

    1989-09-01

    Twenty-two nuclear accident dosimetry intercomparison studies utilizing the fast-pulse Health Physics Research Reactor at the Oak Ridge National Laboratory have been conducted since 1965. These studies have provided a total of 62 different organizations a forum for discussion of criticality accident dosimetry, an opportunity to test their neutron and gamma-ray dosimetry systems under a variety of simulated criticality accident conditions, and the experience of comparing results with reference dose values as well as with the measured results obtained by others making measurements under identical conditions. Sixty-nine nuclear accidents (27 with unmoderated neutron energy spectra and 42 with eight different shielded spectra) have been simulated in the studies. Neutron doses were in the 0.2-8.5 Gy range and gamma doses in the 0.1-2.0 Gy range. A total of 2,289 dose measurements (1,311 neutron, 978 gamma) were made during the intercomparisons. The primary methods of neutron dosimetry were activation foils, thermoluminescent dosimeters, and blood sodium activation. The main methods of gamma dose measurement were thermoluminescent dosimeters, radiophotoluminescent glass, and film. About 68% of the neutron measurements met the accuracy guidelines (+/- 25%) and about 52% of the gamma measurements met the accuracy criterion (+/- 20%) for accident dosimetry.

  20. Severe accident simulation at Olkiuoto

    Energy Technology Data Exchange (ETDEWEB)

    Tirkkonen, H.; Saarenpaeae, T. [Teollisuuden Voima Oy (TVO), Olkiluoto (Finland); Cliff Po, L.C. [Micro-Simulation Technology, Montville, NJ (United States)

    1995-09-01

    A personal computer-based simulator was developed for the Olkiluoto nuclear plant in Finland for training in severe accident management. The generic software PCTRAN was expanded to model the plant-specific features of the ABB Atom designed BWR including its containment over-pressure protection and filtered vent systems. Scenarios including core heat-up, hydrogen generation, core melt and vessel penetration were developed in this work. Radiation leakage paths and dose rate distribution are presented graphically for operator use in diagnosis and mitigation of accidents. Operating on an graphically for operator use in diagnosis and mitigation of accidents. Operating on an 486 DX2-66, PCTRAN-TVO achieves a speed about 15 times faster than real-time. A convenient and user-friendly graphic interface allows full interactive control. In this paper a review of the component models and verification runs are presented.

  1. Preliminary Analysis of a Steam Line Break Accident with the MARS-KS code for the SMART Design with Passive Safety Systems

    Energy Technology Data Exchange (ETDEWEB)

    Kang, Doohyuk; Ko, Yungjoo; Suh, Jaeseung [Hannam Univ., Daejeon (Korea, Republic of); Bae, Hwang; Ryu, Sunguk; Yi, Sungjae; Park, Hyunsik [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2014-05-15

    SMART has been developed by KAERI, and SMART-Standard Design Approval (SDA) was recently granted in 2012. A SMART design with Passive Safety System (PSS) features (called SMART-PSS) is being developed and added to the standard design of SMART by KAERI to improve its safety system. Active safety systems such as safety injection pumps will be replaced by a passive safety system, which is actuated only by the gravity force caused by the height difference. All tanks for the passive safety systems are higher than the injection nozzle, which is located around the reactor coolant pumps (RCPs). In this study, a preliminary analysis of the main steam line break accident (MSLB) was performed using the MARS-KS code to understand the general behavior of the SMART-PSS design and to prepare its validation test with the SMART-ITL (FESTA) facility. An anticipated accident for the main steam line break (MSLB) was performed using the MARS-KS code to understand the thermal-hydraulic behaviors of the SMART-PSS design. The preliminary analysis provides good insight into the passive safety system design features of the SMART-PSS and the thermal-hydraulic characteristics of the SMART design. The analysis results of the MSLB showed that the core water collapsed level inside the core support barrel was maintained high over the active core top level during the transient period. Therefore, the SMART-PSS design has satisfied the requirements to maintain the plant at a safe shutdown condition during 72 hours without AC power or operator action after an anticipated accident.

  2. Monitoring techniques and alarm procedures for CMS Services and Sites in WLCG

    Science.gov (United States)

    Molina-Perez, J.; Bonacorsi, D.; Gutsche, O.; Sciabà, A.; Flix, J.; Kreuzer, P.; Fajardo, E.; Boccali, T.; Klute, M.; Gomes, D.; Kaselis, R.; Du, R.; Magini, N.; Butenas, I.; Wang, W.

    2012-12-01

    The CMS offline computing system is composed of roughly 80 sites (including most experienced T3s) and a number of central services to distribute, process and analyze data worldwide. A high level of stability and reliability is required from the underlying infrastructure and services, partially covered by local or automated monitoring and alarming systems such as Lemon and SLS; the former collects metrics from sensors installed on computing nodes and triggers alarms when values are out of range, the latter measures the quality of service and warns managers when service is affected. CMS has established computing shift procedures with personnel operating worldwide from remote Computing Centers, under the supervision of the Computing Run Coordinator at CERN. This dedicated 24/7 computing shift personnel is contributing to detect and react timely on any unexpected error and hence ensure that CMS workflows are carried out efficiently and in a sustained manner. Synergy among all the involved actors is exploited to ensure the 24/7 monitoring, alarming and troubleshooting of the CMS computing sites and services. We review the deployment of the monitoring and alarming procedures, and report on the experience gained throughout the first two years of LHC operation. We describe the efficiency of the communication tools employed, the coherent monitoring framework, the proactive alarming systems and the proficient troubleshooting procedures that helped the CMS Computing facilities and infrastructure to operate at high reliability levels.

  3. 48 CFR 652.236-70 - Accident Prevention.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 4 2010-10-01 2010-10-01 false Accident Prevention. 652... SOLICITATION PROVISIONS AND CONTRACT CLAUSES Texts of Provisions and Clauses 652.236-70 Accident Prevention. As prescribed in 636.513, insert the following clause: Accident Prevention (APR 2004) (a) General....

  4. A view of treatment process of melted nuclear fuel on a severe accident plant using a molten salt system

    Energy Technology Data Exchange (ETDEWEB)

    Fujita, R.; Takahashi, Y.; Nakamura, H.; Mizuguchi, K. [Power and Industrial Research and Development Center, Toshiba Corporation Power Systems Company, 4-1 Ukishima-cho, Kawasaki-ku, Kawasaki 210-0862 (Japan); Oomori, T. [Chemical System Design and Engineering Department, Toshiba Corporation Power Systems Company, 8 Shinsugita-cho, Isogo-ku, Yokohama 235-8523 (Japan)

    2013-07-01

    At severe accident such as Fukushima Daiichi Nuclear Power Plant Accident, the nuclear fuels in the reactor would melt and form debris which contains stable UO2-ZrO2 mixture corium and parts of vessel such as zircaloy and iron component. The requirements for solution of issues are below; -) the reasonable treatment process of the debris should be simple and in-situ in Fukushima Daiichi power plant, -) the desirable treatment process is to take out UO{sub 2} and PuO{sub 2} or metallic U and TRU metal, and dispose other fission products as high level radioactive waste; and -) the candidate of treatment process should generate the smallest secondary waste. Pyro-process has advantages to treat the debris because of the high solubility of the debris and its total process feasibility. Toshiba proposes a new pyro-process in molten salts using electrolysing Zr before debris fuel being treated.

  5. Analysis of Fukushima Daiichi Accident Using HFACS

    Energy Technology Data Exchange (ETDEWEB)

    Mohamed, Saeed Almheiri [Korea Advanced Institue of Science and Technology, Daejeon (Korea, Republic of)

    2013-10-15

    The shadow of Fukushima Daiichi nuclear power plant (NPP) accident is still too big and will last long. On the other hand, it could still teach us lots of lessons to better design and operate nuclear power plants. In this paper, we will be focusing on the Fukushima Daiichi accident, especially on human organizational factors. We will analyze the accident using Human Factors Analysis and Classification System (HFACS) in order to better understand the organizational climate of TEPCO{sup 1} and NISA{sup 2} that led to Fukushima Daiichi Accident. HFACS was developed for the U. S. aviation industry and has been used at many industries like the rail and mining industries. We found that the HFACS to be greatly beneficial in investigating the latent and organizational causes for the accident. The application results show that the causes of Fukushima Daiichi accident were spread out from sharp end (i.e. Unsafe Act) to blunt end (i. e. Organizational Influences). This means that the corresponding countermeasures should cover from front line staff to management. Thus, we managed to develop a better understanding on how to prevent similar errors or violations. The incident and near-miss have a lot of helpful information because it may show the actual and latent deficiencies of complex systems. We applied the HFACS into Fukushima Daiichi accident to better locate the causes related to both sharp and blunt ends of operation of NPP. In order to derive useful lessons from the accident analysis, the analyst should try to find the similarities not differences from the incident. It is imperative that whatever accident/incident analysis systems we use, we should fully utilize the disastrous Fukushima accident.

  6. False alarm reduction during landmine detection

    Science.gov (United States)

    Prado, P. J.; Chongpison, A.; Doraisamy, L.

    2007-04-01

    Quadrupole Resonance sensors have the unique capability of detecting explosives from buried, plastic-cased antipersonnel and antitank landmines. The chemical specificity of this radio-frequency technique provides the potential to deliver remarkably low false alarm rates during landmine detection. This is of particular importance to deminers, who frequently come across numerous clutter items before uncovering a mine. Quadrupole Resonance is typically utilized in a confirmation mode; preceded by rapid primary scans carried out by, for example, metal detectors, ground penetrating radars or a fusion of these. Significant technical and scientific advances have resulted in the fabrication of handheld and vehicle mounted Quadrupole Resonance landmine detectors in compact, power-efficient configurations. The development work is focused on baseline sensitivity increase, as well as the achievement of high detection performance under field conditions. The mine detection capability of Quadrupole Resonance detectors has been evaluated during various blind tests. A modular handheld unit, combining primary and confirmation sensors, was designed to be operated by a single person. A series of field tests demonstrate the unique capability of Quadrupole Resonance for significant false alarm reduction.

  7. Global estimates of fatal occupational accidents.

    Science.gov (United States)

    Takala, J

    1999-09-01

    Data on occupational accidents are not available from all countries in the world. Furthermore, underreporting, limited coverage by reporting and compensation schemes, and non-harmonized accident recording and notification systems undermine efforts to obtain worldwide information on occupational accidents. This paper presents a method and new estimated global figures of fatal accidents at work by region. The fatal occupational accident rates reported to the International Labour Office are extended to the total employed workforce in countries and regions. For areas not covered by the reported information, rates from other countries that have similar or comparable conditions are applied. In 1994, an average estimated fatal occupational accident rate in the whole world was 14.0 per 100,000 workers, and the total estimated number of fatal occupational accidents was 335,000. The rates are different for individual countries and regions and for separate branches of economic activity. In conclusion, fatal occupational accident figures are higher than previously estimated. The new estimates can be gradually improved by obtaining and adding data from countries where information is not yet available. Sectoral estimates for at least key economic branches in individual countries would further increase the accuracy.

  8. Laser accidents: Being Prepared

    Energy Technology Data Exchange (ETDEWEB)

    Barat, K

    2003-01-24

    The goal of the Laser Safety Officer and any laser safety program is to prevent a laser accident from occurring, in particular an injury to a person's eyes. Most laser safety courses talk about laser accidents, causes, and types of injury. The purpose of this presentation is to present a plan for safety offices and users to follow in case of accident or injury from laser radiation.

  9. General radiation management situation at the first stage of accident occurrence. Fire and explosion of asphalt solidification processing facility

    Energy Technology Data Exchange (ETDEWEB)

    Noda, Kimio; Shimizu, Takehiko; Ishiguro, Shuji [Health and Safety Division, Power Reactor and Nuclear Fuel Development Corp., Tokai, Ibaraki (Japan)

    1998-03-01

    Fire accident in the cell of Asphalt Solidification Processing Facility (ASP) in PNC took placed at 10:06 a.m., March 11, 1997. Explosion accident occurred subsequently in the ASP at 8:04 p.m. of the day about 10 hours later. The accident which included loss of confinement function of the cell, release of radioactive materials to the working environment, evacuation of many workers, radioactive materials intake of the workers, alarm of many radiation monitoring system, diffusion of radiation materials to off-site, required the radiation management division to take a prompt and wide-ranging protective action. No one was inflicted an external injury by the accident. The workers who inhaled a few radioactive materials, such as Cs-137, were 37 in number. The maximum committed effective dose equivalent or a person was estimated 0.4-1.6 mSv, taking account of the effects of alpha-ray emission nuclides. Radioactive materials were released outside through the raptured windows of the facility. Radioactive nuclides, such as Cs, Sr, Pu, and Am were detected in site by the environmental monitoring. A small quantity of Cs was detected in the aerosols of Oarai area, where is located at about 20 km south-south-west distant from the accidental site. The total amount of effluent throughout the accident was estimated about 1-4 GBq for {beta}-ray emission nuclides, excluding C-14, and about 1x10{sup -4}-4 x 10{sup -3} GBq for {alpha}-ray emission nuclides. The maximum committed effective dose equivalent for the general public was estimated about 1x10{sup -3}-2 x 10{sup -2} mSv. (M. Suetake)

  10. [Accidents with the "paraglider"].

    Science.gov (United States)

    Lang, T H; Dengg, C; Gabl, M

    1988-09-01

    With a collective of 46 patients we show the details and kinds of accidents caused by paragliding. The base for the casuistry of the accidents was a questionnaire which was answered by most of the injured persons. These were questions about the theoretical and practical training, the course of the flight during the different phases, and the subjective point of view of the course of the accident. The patterns of the injuries showed a high incidence of injuries of the spinal column and high risks for the ankles. At the end, we give some advice how to prevent these accidents.

  11. Alarm threshold levels of meningitis outbreak in Hamadan province (2010- 2012

    Directory of Open Access Journals (Sweden)

    Mohammad Fariadras

    2015-11-01

    Full Text Available Background: The surveillance systems need to define the levels of alarm threshold for early detection of outbreak. The purpose of this study was to determine the threshold levels of meningitis outbreak in Hamadan province, Iran. Methods: The suspected cases of meningitis that were reported through meningitis surveillance form 2010 to 2012 were investigated in this study. Explainable patterns of the syndromic data of fever and neurological symptoms were removed by Generalized Linear Model. The upper limits of cumulative sum (CUSUM algorithm were used to estimate the alarm threshold levels of meningitis outbreak. The seasonal pattern of dynamic alarm thresholds was defined using the data obtained from different seasons. Results: The fixed alarm threshold levels according to standardized CUSUM, i.e. 1.5 to 2 standard deviations from the mean, were equal to the occurrence of more than 3 and 4 suspected cases of meningitis, respectively. The corresponding values for dynamic levels based on the upper control limit of CUSUM were 2.6 to 3.2 cases for different seasons. In other words, 3 cases were considered to be a discrete scale for suspected cases of meningitis. Conclusion: Due to the seasonality pattern of meningitis, dynamic levels of alarm threshold should be determined according to the seasons and months of year.

  12. 46 CFR 78.47-10 - Manual alarm boxes.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Manual alarm boxes. 78.47-10 Section 78.47-10 Shipping... and Emergency Equipment, Etc. § 78.47-10 Manual alarm boxes. (a) In all new installations, manual... at least 1/2 inch letters “IN CASE OF FIRE BREAK GLASS.” All manual alarm boxes shall be numbered...

  13. Expected Detection and False Alarm Rates for Transiting Jovian Planets

    CERN Document Server

    Brown, T M

    2003-01-01

    Ground-based searches for transiting Jupiter-sized planets have so far produced few detections of planets, but many of stellar systems with eclipse depths, durations, and orbital periods that resemble those expected from planets. I show that these detection rates are consistent with our present knowledge of binary and multiple-star systems, and of Jovian-mass extrasolar planets. Upcoming space-based searches for transiting Earth-sized planets will be largely unaffected by the sources of false alarms that afflict current ground-based searches, with one exception, namely distant eclipsing binaries whose light is strongly diluted by that of a foreground star. A byproduct of the rate estimation is evidence that the period distribution of extrasolar planets is depressed for periods between 5 and 200 days.

  14. Shadow Probability of Detection and False Alarm for Median-Filtered SAR Imagery

    Energy Technology Data Exchange (ETDEWEB)

    Raynal, Ann Marie [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). ISR Analysis and Applications Dept.; Doerry, Armin Walter [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). ISR Mission Engineering Dept.; Miller, John A. [General Atomics Aeronautical Systems, Inc., San Diego, CA (United States). Mission Systems; Bishop, Edward E. [General Atomics Aeronautical Systems, Inc., San Diego, CA (United States). Mission Systems; Horndt, Volker [General Atomics Aeronautical Systems, Inc., San Diego, CA (United States). Mission Systems

    2014-06-01

    Median filtering reduces speckle in synthetic aperture radar (SAR) imagery while preserving edges, at the expense of coarsening the resolution, by replacing the center pixel of a sliding window by the median value. For shadow detection, this approach helps distinguish shadows from clutter more easily, while preserving shadow shape delineations. However, the nonlinear operation alters the shadow and clutter distributions and statistics, which must be taken into consideration when computing probability of detection and false alarm metrics. Depending on system parameters, median filtering can improve probability of detection and false alarm by orders of magnitude. Herein, we examine shadow probability of detection and false alarm in a homogeneous, ideal clutter background after median filter post-processing. Some comments on multi-look processing effects with and without median filtering are also made.

  15. Soft real-time alarm messages for ATLAS TDAQ

    Energy Technology Data Exchange (ETDEWEB)

    Darlea, G., E-mail: georgiana.lavinia.darlea@cern.c [CERN, Geneva (Switzerland); Al Shabibi, A.; Martin, B.; Lehmann Miotto, G. [CERN, Geneva (Switzerland)

    2010-05-21

    The ATLAS TDAQ network consists of three separate Ethernet-based networks (Data, Control and Management) with over 2000 end-nodes. The TDAQ system has to be aware of the meaningful network failures and events in order for it to take effective recovery actions. The first stage of the process is implemented with Spectrum, a commercial network management tool. Spectrum detects and registers all network events, then it publishes the information via a CORBA programming interface. A gateway program (called NSG-Network Service Gateway) connects to Spectrum through CORBA and exposes to its clients a Java RMI interface. This interface implements a callback mechanism that allows the clients to subscribe for monitoring 'interesting' parts of the network. The last stage of the TDAQ network monitoring tool is implemented in a module named DNC (DAQ to Network Connection), which filters the events that are to be reported to the TDAQ system: it subscribes to the gateway only for the machines that are currently active in the system and it forwards only the alarms that are considered important for the current TDAQ data taking session. The network information is then synthesized and presented in a human-readable format. These messages can be further processed either by the shifter who is in charge, the network expert or the Online Expert System. This article aims to describe the different mechanisms of the chain that transports the network events to the front-end user, as well as the constraints and rules that govern the filtering and the final format of the alarm messages.

  16. Soft real-time alarm messages for ATLAS TDAQ

    Science.gov (United States)

    Darlea, G.; Al Shabibi, A.; Martin, B.; Lehmann Miotto, G.

    2010-05-01

    The ATLAS TDAQ network consists of three separate Ethernet-based networks (Data, Control and Management) with over 2000 end-nodes. The TDAQ system has to be aware of the meaningful network failures and events in order for it to take effective recovery actions. The first stage of the process is implemented with Spectrum, a commercial network management tool. Spectrum detects and registers all network events, then it publishes the information via a CORBA programming interface. A gateway program (called NSG—Network Service Gateway) connects to Spectrum through CORBA and exposes to its clients a Java RMI interface. This interface implements a callback mechanism that allows the clients to subscribe for monitoring "interesting" parts of the network. The last stage of the TDAQ network monitoring tool is implemented in a module named DNC (DAQ to Network Connection), which filters the events that are to be reported to the TDAQ system: it subscribes to the gateway only for the machines that are currently active in the system and it forwards only the alarms that are considered important for the current TDAQ data taking session. The network information is then synthesized and presented in a human-readable format. These messages can be further processed either by the shifter who is in charge, the network expert or the Online Expert System. This article aims to describe the different mechanisms of the chain that transports the network events to the front-end user, as well as the constraints and rules that govern the filtering and the final format of the alarm messages.

  17. Aplikasi Sensor Cahaya Untuk Alarm Anti Pencuri

    Directory of Open Access Journals (Sweden)

    Asita Shoman Muzaki

    2011-11-01

    Full Text Available Kasus pencurian di rumah kosong yang ditinggal pergi oleh pemiliknya belakangan ini marak terjadi. Berangkat dari pemikiran ini penulis mencoba merancang alarm yang dapat mendeteksi pergerakan seseorang saat rumah dalam kondisi kosong, ditinggalkan oleh pemiliknya. Alat ini mempunyai prinsip kerja yaitu mendeteksi bayangan seseorang yang melewati titik tertentu. Perancangan dan pembuatan perangkat ini menggunakan sensor cahaya berupa LASER dan LDR yang dirangkai dengan transistor sebagai saklar otomatis serta LED dan telepon rumah untuk melakukan panggilan kepada nomor telepon pemilik rumah. Komponen yang dipakai dalam pembuatan perangkat ini antara lain IC LM7805, LASER pointer, resistor, transistor BC108, LED, relay dan telepon rumah. Perancangan dan pembuatan alat menggunakan software multisim 10.1 sebagai simulator rangkaian, dan software eagle 5.1.1 untuk mendesain jalur rangkaian pada papan PCB. Saat cahaya LASER tidak sampai ke LDR karena terhalang oleh sesuatu, maka rangkaian output yang berupa indikator LED dan panggilan dari telepon rumah akan aktif

  18. Kidkit guides children into alarming atmospheres

    DEFF Research Database (Denmark)

    Højlund, Marie; Kinch, Sofie

    2013-01-01

    on the development and evaluation of Kidkit, which is interactive furniture designed for young children who are going to visit a hospitalized relative with fatal injuries for the first time. Kidkit empowers the child to engage and be present by shaping Middle Ground Experiences in the hospital ward environment...... that is full of intimidating medical equipment and alarms. The evaluation results indicate collective rewards gained when children succeed in Embodied Habituation. Finally, the paper discusses how Middle Ground Experiences inevitably establish grounds for how we design for spatial experiences within......This paper presents the concept of Embodied Habituation as an architectural approach to designing contextualized technologies. It does so by identifying Middle Ground Experiences acknowledging how spaces are inhabited with ambiguous qualities that affect people emotionally. The research is based...

  19. Accident and everyday use for small PV power supply system. 2; Saigaiji ken`yo kogata taiyoko hatsuden system. 2

    Energy Technology Data Exchange (ETDEWEB)

    Yokoyama, S.; Sano, N.; Itsumi, J. [Kumamoto Institute of Technology, Kumamoto (Japan)

    1997-11-25

    Study is under way for the development of a small power source system capable of supplying power to public facilities and home appliances at normal times and capable of turning immediately into a self-sustained power source in case of emergency. This study discusses a power source that is a combination of solar cell modules and a storage battery, which is subjected to analysis for its match with a light or a data-processing computer imposed as a load on the power source. In the experiment, the power source consists of solar cell modules and a rectangular wave inverter. The battery is a 12V/28Ah automotive battery, the solar cells are two 75W (17V/4.4A) modules, and the load is a fluorescent lamp, fan, electric bulb, or a computer. It is found that the system can operate near the maximum power point of the solar cell modules when the load is light and that the system still works on even when the load consumes more than what the solar cells module produce, this thanks to the battery serving as a backup. In the future, a test-dedicated small power source now under construction will be put to continuous operation for further study. 4 refs., 4 figs., 1 tab.

  20. Communication and industrial accidents

    NARCIS (Netherlands)

    As, Sicco van

    2001-01-01

    This paper deals with the influence of organizational communication on safety. Accidents are actually caused by individual mistakes. However the underlying causes of accidents are often organizational. As a link between these two levels - the organizational failures and mistakes - I suggest the conc

  1. Accidents - personal factors

    Energy Technology Data Exchange (ETDEWEB)

    Zaitsev, S.L.; Tsygankov, A.V.

    1982-03-01

    This paper evaluates influence of selected personal factors on accident rate in underground coal mines in the USSR. Investigations show that so-called organizational factors cause from 80 to 85% of all accidents. About 70% of the organizational factors is associated with social, personal and economic features of personnel. Selected results of the investigations carried out in Donbass mines are discussed. Causes of miner dissatisfaction are reviewed: 14% is caused by unsatisfactory working conditions, 21% by repeated machine failures, 16% by forced labor during days off, 14% by unsatisfactory material supply, 16% by hard physical labor, 19% by other reasons. About 25% of miners injured during work accidents are characterized as highly professionally qualified with automatic reactions, and about 41% by medium qualifications. About 60% of accidents is caused by miners with less than a 3 year period of service. About 15% of accidents occurs during the first month after a miner has returned from a leave. More than 30% of accidents occurs on the first work day after a day or days off. Distribution of accidents is also presented: 19% of accidents occurs during the first 2 hours of a shift, 36% from the second to the fourth hour, and 45% occurs after the fourth hour and before the shift ends.

  2. Accident investigation and analysis

    NARCIS (Netherlands)

    Kampen, J. van; Drupsteen, L.

    2013-01-01

    Many organisations and companies take extensive proactive measures to identify, evaluate and reduce occupational risks. However, despite these efforts things still go wrong and unintended events occur. After a major incident or accident, conducting an accident investigation is generally the next ste

  3. Design Study of Nuclear Power Plant Severe Accidents Monitoring and Control System%核电厂严重事故监测和控制系统的设计研究

    Institute of Scientific and Technical Information of China (English)

    杜德君; 何庆镭

    2015-01-01

    HAF102-2004 "Nuclear power plant safety requirements for quality assurance" requires: besides of design reference, nuclear power plant design must consider the specific case beyond design reference, which includes the behavior of selected severe accidents. After the Fukushima accidents, each country pays more attention to sever accidents, the prevention and mitigation of severe accidents becomes one important point for the nuclear plant design. In the third generation nuclear power plant, the severe accidents monitoring and control system should be implemented to realize the function of prevention and mitigation for severe accidents.%HAF102-2004《核动力厂设计安全规定》中要求:除了设计基准外,设计中还必须考虑核动力厂在特定的超设计基准事故包括选定的严重事故中的行为。2011年福岛事故后,各国对严重事故更加关注,严重事故的预防和缓解成为核电厂设计中的一个重点。在三代核电厂设计中,增加了专门的严重事故监测和控制系统用来实现严重事故的预防和缓解功能。

  4. Comparative Assessment of Severe Accidents in the Chinese Energy Sector

    Energy Technology Data Exchange (ETDEWEB)

    Hirschberg, S.; Burgherr, P.; Spiekerman, G.; Cazzoli, E.; Vitazek, J.; Cheng, L

    2003-03-01

    This report deals with the comparative assessment of accidents risks characteristic for the various electricity supply options. A reasonably complete picture of the wide spectrum of health, environmental and economic effects associated with various energy systems can only be obtained by considering damages due to normal operation as well as due to accidents. The focus of the present work is on severe accidents, as these are considered controversial. By severe accidents we understand potential or actual accidents that represent a significant risk to people, property and the environment and may lead to large consequences. (author)

  5. A model of objects based on KKS for the processing of alarms at the Angra 2 nuclear power plant; Um modelo de objetos baseado em KKS para o processamento de alarmes da usina nuclear de Angra 2

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Paulo Adriano da

    2000-03-01

    The purpose of this work is to present a new model of the alarm annunciation system of the Angra 2 nuclear power plant, using concepts of object based modeling and having as basic the Angra 2 Systems and Components Identification System - KKS. The present structure of the Computerized Alarm System - CAS of Angra 2 does not permit a fast visualization of the incoming alarms in case that a great number of them go off, because the monitors can only show 7 indications at a time. The herein proposed model permits a fast identification of the generated alarms, making possible for the operator to have a general view of the current nuclear power plant status. Its managing tree structure has an hierarchical dependence among its nodes, from where, the presently activated alarms are shown. Its man-machine interface is easy interaction and understand because it is based on structure well known by the Angra 2 operators which is the Angra 2 Systems and Components Identification System - KKS. The project was implemented in the format of an Angra 2 Alarms Supervision System (SSAA), and, for purpose of simulation, 5 system of the Angra 2 Nuclear Power Plant have been chosen. The data used in the project like measurement KKS, measurement limits, unity, setpoints, alarms text and systems flow diagrams, are actual data of the Angra 2 Nuclear Power Plant. The Visual Basic programming Language has been used, with emphasis to the object oriented programming, which and modification, without modifying the program code. Event hough using the Visual Basic for programming, the model has shown, for its purpose, a satisfactory real time execution. (author)

  6. Alarm symptoms of upper gastrointestinal cancer and contact to general practice

    DEFF Research Database (Denmark)

    Rasmussen, Sanne; Larsen, Pia Veldt; Svendsen, Rikke Pilsgaard;

    2015-01-01

    INTRODUCTION: Survival of upper gastrointestinal (GI) cancer depends on early stage diagnosis. Symptom-based guidelines and fast-track referral systems have been implemented for use in general practice. To improve diagnosis of upper GI cancer, knowledge on prevalence of alarm symptoms...

  7. False alarm recognition in hyperspectral gas plume identification

    Energy Technology Data Exchange (ETDEWEB)

    Conger, James L. (San Ramon, CA); Lawson, Janice K. (Tracy, CA); Aimonetti, William D. (Livermore, CA)

    2011-03-29

    According to one embodiment, a method for analyzing hyperspectral data includes collecting first hyperspectral data of a scene using a hyperspectral imager during a no-gas period and analyzing the first hyperspectral data using one or more gas plume detection logics. The gas plume detection logic is executed using a low detection threshold, and detects each occurrence of an observed hyperspectral signature. The method also includes generating a histogram for all occurrences of each observed hyperspectral signature which is detected using the gas plume detection logic, and determining a probability of false alarm (PFA) for all occurrences of each observed hyperspectral signature based on the histogram. Possibly at some other time, the method includes collecting second hyperspectral data, and analyzing the second hyperspectral data using the one or more gas plume detection logics and the PFA to determine if any gas is present. Other systems and methods are also included.

  8. Successful Use of the Nocturnal Urine Alarm for Diurnal Enuresis.

    Science.gov (United States)

    Friman, Patrick C.; Vollmer, Dennis

    1995-01-01

    A urine alarm, typically used to treat nocturnal enuresis, was effectively used to treat diurnal enuresis in a 15-year-old female with depression, attention deficit hyperactivity disorder, and conduct disorder. The study indicated that the alarm eliminated wetting in both treatment phases and that continence was maintained at three-month and…

  9. 24 CFR 3280.208 - Smoke alarm requirements.

    Science.gov (United States)

    2010-04-01

    ... locations: (i) To protect both the living area and kitchen space. Manufacturers are encouraged to locate the alarm in the living area remote from the kitchen and cooking appliances. A smoke alarm located within 20... when a home is equipped or designed for future installation of a roof-mounted evaporative cooler...

  10. 46 CFR 28.250 - High water alarms.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false High water alarms. 28.250 Section 28.250 Shipping COAST... Individuals On Board, or for Fish Tender Vessels Engaged in the Aleutian Trade § 28.250 High water alarms. On... operating station to indicate high water level in each of the following normally unmanned spaces: (a)...

  11. [Citalopram, escitalopram and prolonged QT: warning or alarm?].

    Science.gov (United States)

    Alvarez, Enric; Vieira, Sara; Garcia-Moll, Xavier

    2014-01-01

    The alerts issued by regulatory agencies on the potential cardiac toxicity of citalopram and escitalopram have caused alarm among clinicians. A review of the data concerning this topic shows that the alarm should be limited to patients with a history of syncope or poisoning. As a precautionary measure, an electrocardiogram should be performed on elderly patients.

  12. 46 CFR 131.805 - General alarm bell, switch.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false General alarm bell, switch. 131.805 Section 131.805 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS OPERATIONS Markings for Fire Equipment and Emergency Equipment § 131.805 General alarm bell, switch. The switch in...

  13. Road accidents and business cycles in Spain.

    Science.gov (United States)

    Rodríguez-López, Jesús; Marrero, Gustavo A; González, Rosa Marina; Leal-Linares, Teresa

    2016-11-01

    This paper explores the causes behind the downturn in road accidents in Spain across the last decade. Possible causes are grouped into three categories: Institutional factors (a Penalty Point System, PPS, dating from 2006), technological factors (active safety and passive safety of vehicles), and macroeconomic factors (the Great recession starting in 2008, and an increase in fuel prices during the spring of 2008). The PPS has been blessed by incumbent authorities as responsible for the decline of road fatalities in Spain. Using cointegration techniques, the GDP growth rate, the fuel price, the PPS, and technological items embedded in motor vehicles appear to be statistically significantly related with accidents. Importantly, PPS is found to be significant in reducing fatal accidents. However, PPS is not significant for non-fatal accidents. In view of these results, we conclude that road accidents in Spain are very sensitive to the business cycle, and that the PPS influenced the severity (fatality) rather than the quantity of accidents in Spain. Importantly, technological items help explain a sizable fraction in accidents downturn, their effects dating back from the end of the nineties.

  14. Safety analysis of surface haulage accidents

    Energy Technology Data Exchange (ETDEWEB)

    Randolph, R.F.; Boldt, C.M.K.

    1996-12-31

    Research on improving haulage truck safety, started by the U.S. Bureau of Mines, is being continued by its successors. This paper reports the orientation of the renewed research efforts, beginning with an update on accident data analysis, the role of multiple causes in these accidents, and the search for practical methods for addressing the most important causes. Fatal haulage accidents most often involve loss of control or collisions caused by a variety of factors. Lost-time injuries most often involve sprains or strains to the back or multiple body areas, which can often be attributed to rough roads and the shocks of loading and unloading. Research to reduce these accidents includes improved warning systems, shock isolation for drivers, encouraging seatbelt usage, and general improvements to system and task design.

  15. Persistence of airline accidents.

    Science.gov (United States)

    Barros, Carlos Pestana; Faria, Joao Ricardo; Gil-Alana, Luis Alberiko

    2010-10-01

    This paper expands on air travel accident research by examining the relationship between air travel accidents and airline traffic or volume in the period from 1927-2006. The theoretical model is based on a representative airline company that aims to maximise its profits, and it utilises a fractional integration approach in order to determine whether there is a persistent pattern over time with respect to air accidents and air traffic. Furthermore, the paper analyses how airline accidents are related to traffic using a fractional cointegration approach. It finds that airline accidents are persistent and that a (non-stationary) fractional cointegration relationship exists between total airline accidents and airline passengers, airline miles and airline revenues, with shocks that affect the long-run equilibrium disappearing in the very long term. Moreover, this relation is negative, which might be due to the fact that air travel is becoming safer and there is greater competition in the airline industry. Policy implications are derived for countering accident events, based on competition and regulation.

  16. A correlation consistency based multivariate alarm thresholds optimization approach.

    Science.gov (United States)

    Gao, Huihui; Liu, Feifei; Zhu, Qunxiong

    2016-11-01

    Different alarm thresholds could generate different alarm data, resulting in different correlations. A new multivariate alarm thresholds optimization methodology based on the correlation consistency between process data and alarm data is proposed in this paper. The interpretative structural modeling is adopted to select the key variables. For the key variables, the correlation coefficients of process data are calculated by the Pearson correlation analysis, while the correlation coefficients of alarm data are calculated by kernel density estimation. To ensure the correlation consistency, the objective function is established as the sum of the absolute differences between these two types of correlations. The optimal thresholds are obtained using particle swarm optimization algorithm. Case study of Tennessee Eastman process is given to demonstrate the effectiveness of proposed method.

  17. Development of a new aerosol monitoring system and its application in Fukushima nuclear accident related aerosol radioactivity measurement at the CTBT radionuclide station in Sidney of Canada

    Energy Technology Data Exchange (ETDEWEB)

    Zhang Weihua, E-mail: weihua.zhang@hc-sc.gc.ca [Radiation Protection Bureau, Health Canada, 775 Brookfield Road, Ottawa, Ontario, K1A 1C1 (Canada); Bean, Marc; Benotto, Mike; Cheung, Jeff; Ungar, Kurt; Ahier, Brian [Radiation Protection Bureau, Health Canada, 775 Brookfield Road, Ottawa, Ontario, K1A 1C1 (Canada)

    2011-12-15

    A high volume aerosol sampler ('Grey Owl') has been designed and developed at the Radiation Protection Bureau, Health Canada. Its design guidance is based on the need for a low operational cost and reliable sampler to provide daily aerosol monitoring samples that can be used as reference samples for radiological studies. It has been developed to provide a constant air flow rate at low pressure drops ({approx}3 kPa for a day sampling) with variations of less than {+-}1% of the full scale flow rate. Its energy consumption is only about 1.5 kW for a filter sampling over 22,000 standard cubic meter of air. It has been demonstrated in this Fukushima nuclear accident related aerosol radioactivity monitoring study at Sidney station, B.C. that the sampler is robust and reliable. The results provided by the new monitoring system have been used to support decision-making in Canada during an emergency response. - Highlights: > A new high volume aerosol sampler ('Grey Owl') has been developed in this study. > It operates at low pressure drops with low energy consumption. > The variation of air flow rate is less than {+-}1% of the full scale. > Fukushima accident nuclide monitoring at Sidney shows that it is robust and reliable.

  18. 徐大堡核电站运行和维修技术支持大楼的火灾自动报警系统设计%Automatic Fire Alarm System Design of Operation and Maintenance Technical Support Building of XU Dapu Nuclear Power Plant

    Institute of Scientific and Technical Information of China (English)

    韩圆

    2016-01-01

    Compared with other auxiliary workshops,XU Dapu Nuclear Power Plant has the characteristic of higher personnel density,more fire compartments and more concentrated communication machine rooms, etc. This paper introduced the design of the automatic fire alarm system based on the fire detection requirements,fire-fighting requirements and the characteristics of the building. The design could provide a certain guarantee for the safe operation of the building,and also provide a reference of automatic fire alarm system design for the operation and maintenance technology support building of subsequent AP1000 million kilowatt PWR nuclear power plant.%相比核电站其他辅助厂房,徐大堡核电站运行和维修技术支持大楼具有人员密度高、防火分区多、通信机房集中等特点。根据该建筑物特点、火灾探测和灭火要求对大楼火灾自动报警系统进行设计,为大楼安全运行提供一定保障,也为后续A P1000百万千瓦级压水堆核电站运行和维修技术支持大楼的火灾自动报警系统设计提供参考。

  19. Using the Star CCM+ software system for modeling the thermal state and natural convection in the melt metal layer during severe accidents in VVER reactors

    Science.gov (United States)

    Kochetov, N. A.; Loktionov, V. D.; Sidorov, A. S.

    2015-09-01

    The possibility of using the Star CCM+ software system for analyzing the thermal state of the melt pool metal layer generated as a result of melt stratification during a severe accident in pressure-vessel nuclear reactors is considered. In order to verify and substantiate the possibility of using this software system for modeling the natural convection processes in the melt at high values of the Rayleigh number, test problems were solved. The obtained results were found to be in good agreement with the known solutions and with the experimental data. The behavior of the melt metal layer was subjected to a parametric analysis for different melt heating conditions, the results of which showed that certain parameters have a determining influence on the so-called focusing effect and on the specific features of current in this layer.

  20. Boating Accident Statistics

    Data.gov (United States)

    Department of Homeland Security — Accident statistics available on the Coast Guard’s website by state, year, and one variable to obtain tables and/or graphs. Data from reports has been loaded for...

  1. Accident resistant transport container

    Science.gov (United States)

    Andersen, John A.; Cole, James K.

    1980-01-01

    The invention relates to a container for the safe air transport of plutonium having several intermediate wood layers and a load spreader intermediate an inner container and an outer shell for mitigation of shock during a hypothetical accident.

  2. Accidents with sulfuric acid

    OpenAIRE

    Rajković Miloš B.

    2006-01-01

    Sulfuric acid is an important industrial and strategic raw material, the production of which is developing on all continents, in many factories in the world and with an annual production of over 160 million tons. On the other hand, the production, transport and usage are very dangerous and demand measures of precaution because the consequences could be catastrophic, and not only at the local level where the accident would happen. Accidents that have been publicly recorded during the last eigh...

  3. Acoustic structures in the alarm calls of Gunnison's prairie dogs.

    Science.gov (United States)

    Slobodchikoff, C N; Placer, J

    2006-05-01

    Acoustic structures of sound in Gunnison's prairie dog alarm calls are described, showing how these acoustic structures may encode information about three different predator species (red-tailed hawk-Buteo jamaicensis; domestic dog-Canis familaris; and coyote-Canis latrans). By dividing each alarm call into 25 equal-sized partitions and using resonant frequencies within each partition, commonly occurring acoustic structures were identified as components of alarm calls for the three predators. Although most of the acoustic structures appeared in alarm calls elicited by all three predator species, the frequency of occurrence of these acoustic structures varied among the alarm calls for the different predators, suggesting that these structures encode identifying information for each of the predators. A classification analysis of alarm calls elicited by each of the three predators showed that acoustic structures could correctly classify 67% of the calls elicited by domestic dogs, 73% of the calls elicited by coyotes, and 99% of the calls elicited by red-tailed hawks. The different distributions of acoustic structures associated with alarm calls for the three predator species suggest a duality of function, one of the design elements of language listed by Hockett [in Animal Sounds and Communication, edited by W. E. Lanyon and W. N. Tavolga (American Institute of Biological Sciences, Washington, DC, 1960), pp. 392-430].

  4. Improvement of radiological consequence estimation methodologies for NPP accidents in the ARGOS and RODOS decision support systems through consideration of contaminant physico-chemical forms

    Energy Technology Data Exchange (ETDEWEB)

    Andersson, K.G.; Roos, P. [Technical University of Denmark - DTU (Denmark); Lind, O.C.; Salbu, B. [Norwegian University of Life Sciences/CERAD - NMBU (Norway); Bujan, A.; Duranova, T. [VUJE, Inc. (Slovakia); Ikonomopoulos, A.; Andronopoulos, S. [National Centre for Scientific Research ' Demokritos' (Greece)

    2014-07-01

    The European standard computerized decision support systems RODOS and ARGOS, which are integrated in the operational nuclear emergency preparedness in practically all European countries, as well as in a range of non-European countries, are highly valuable tools for radiological consequence estimation, e.g., in connection with planning and exercising as well as in justification and optimization of intervention strategies. Differences between the Chernobyl and Fukushima accident atmospheric release source terms have demonstrated that differences in release conditions and processes may lead to very different degrees of volatilization of some radionuclides. Also the physico-chemical properties of radionuclides released can depend strongly on the release process. An example from the Chernobyl accident of the significance of this is that strontium particles released in the fire were oxidized and thus generally physico-chemically different from those released during the preceding explosion. This is reflected in the very different environmental mobility of the two groups of particles. The initial elemental matrix characteristics of the contaminants, as well as environmental parameters like pH, determine for instance the particle dissolution time functions, and thus the environmental mobility and potential for uptake in living organisms. As ICRP recommends optimization of intervention according to residual dose, it is crucial to estimate long term dose contributions adequately. In the EURATOM FP7 project PREPARE, an effort is made to integrate physico-chemical forms of contaminants in scenario-specific source term determination, thereby enabling consideration of influences on atmospheric dispersion/deposition, post-deposition migration, and effectiveness of countermeasure implementation. The first step in this context was to investigate, based on available experience, the important physico-chemical properties of radio-contaminants that might potentially be released to the

  5. FUNDING OF ACCIDENT INSURANCE IN UKRAINE

    Directory of Open Access Journals (Sweden)

    O. Gamankova

    2016-03-01

    Full Text Available The paper deals with the peculiarities of financial provision of public and private accident insurance. Analyzes the methodology of forming insurance premium rates in private accident insurance. The study examines the practice of reforming the financial security of the state social insurance against accidents. The results show need to implement scientifically proven approach to determining premium rates in the state social insurance based on mathematical statistics and actuarial calculations to ensure that such conditions on the one hand, can insure the risk, and the other - to provide the insurer the ability to perform insurance obligations' commitments. One of the promising areas of improvement Accident Insurance determines to define increasing the role of the private sector to create and attraction of investments, financing, reduce costs, and provision of insurance services on insurance against accidents at a qualitatively higher level. The results show the need to consider the usefulness of a mixed provision of services to accident insurance under state or non-state system, and the viability and effectiveness of the combination of these systems.

  6. 基于Java的桥梁强震动实时监测及警报系统开发与应用%Development and Application of Strong Motion Real-time Monitoring and Alarm System for Bridges Based on Java

    Institute of Scientific and Technical Information of China (English)

    赵贤任; 王立新; 郭德顺; 严琨; 杨芳; 朱嘉健

    2016-01-01

    Strong motion monitoring arrays have been built on Queshi Bridge in Shantou, Jiujiang Bridge in Fokai highway, Huangpu Bridge over Zhujiang River and Humen Bridge in Dongguan. The amount of structural real-time vibration data of long-span bridges collected by the strong motion monitoring arrays are huge, and the timeliness requirement of earthquake, collision and other events is high. Therefore, it is necessary to establish a rapid response monitoring data processing and alarm system. This paper develops the strong motion real-time monitoring and alarm system based on Client/Server ( C/S) mode for bridges by using Java language and combining with Socket and multi-threading technology based on JOPENS. The system comprises configuration module, data acquisition module, data storage module, monitoring module, data browsing module, alarm module and data analysis module. The system can be installed across different platform, and the interface is simple and easy to operate. The system has been running steadily for 2 to 6 years on several bridges, and it can be applied to the strong motion monitoring and alerts of other major engineering structures.%本文使用Java语言,在测震台网《数据采集与常规处理》区域版(JOPENS)的基础上结合Socket、多线程等技术,开发出基于Client/Server (C/S)模式的桥梁强震动实时监测及警报系统,系统包括配置模块、数据采集模块、数据存储模块、监测模块、数据浏览模块、警报模块和数据分析模块,可跨平台安装。该系统已在多座大桥上稳定运行,可将其推广到其他重大工程结构的强震动监测及事件警报。

  7. Characterization of Space Shuttle External Tank Thermal Protection System (TPS) Materials in Support of the Columbia Accident Investigation

    Science.gov (United States)

    Wingard, Charles D.

    2004-01-01

    NASA suffered the loss of the seven-member crew of the Space Shuttle Columbia on February 1, 2003 when the vehicle broke apart upon re-entry to the Earth's atmosphere. The final report of the Columbia Accident Investigation Board (CAIB) determined that the accident was caused by a launch ascent incident-a suitcase-sized chunk of insulating foam on the Shuttle's External Tank (ET) broke off, and moving at almost 500 mph, struck an area of the leading edge of the Shuttle s left wing. As a result, one or more of the protective Reinforced Carbon-Carbon (RCC) panels on the wing leading edge were damaged. Upon re-entry, superheated air approaching 3,000 F breached the wing damage and caused the vehicle breakup and loss of crew. The large chunk of insulating foam that broke off during the Columbia launch was determined to come from the so-called bipod ramp area where the Shuttle s orbiter (containing crew) is attached to the ET. Underneath the foam in the bipod ramp area is a layer of TPS that is a cork-filled silicone rubber composite. In March 2003, the NASA Marshall Space Flight Center (MSFC) in Huntsville, Alabama received cured samples of the foam and composite for testing from the Michoud Assembly Facility (MAF) in New Orleans, Louisiana. The MAF is where the Shuttle's ET is manufactured. The foam and composite TPS materials for the ET have been well characterized for mechanical property data at the super-cold temperatures of the liquid oxygen and hydrogen fuels used in the ET. However, modulus data on these materials is not as well characterized. The TA Instruments 2980 Dynamic Mechanical Analyzer (DMA) was used to determine the modulus of the two TPS materials over a range of -145 to 95 C in the dual cantilever bending mode. Multi-strain, fixed frequency DMA tests were followed by multi-frequency, fixed strain tests to determine the approximate bounds of linear viscoelastic behavior for the two materials. Additional information is included in the original extended

  8. Accident progression event tree analysis for postulated severe accidents at N Reactor

    Energy Technology Data Exchange (ETDEWEB)

    Wyss, G.D.; Camp, A.L.; Miller, L.A.; Dingman, S.E.; Kunsman, D.M. (Sandia National Labs., Albuquerque, NM (USA)); Medford, G.T. (Science Applications International Corp., Albuquerque, NM (USA))

    1990-06-01

    A Level II/III probabilistic risk assessment (PRA) has been performed for N Reactor, a Department of Energy (DOE) production reactor located on the Hanford reservation in Washington. The accident progression analysis documented in this report determines how core damage accidents identified in the Level I PRA progress from fuel damage to confinement response and potential releases the environment. The objectives of the study are to generate accident progression data for the Level II/III PRA source term model and to identify changes that could improve plant response under accident conditions. The scope of the analysis is comprehensive, excluding only sabotage and operator errors of commission. State-of-the-art methodology is employed based largely on the methods developed by Sandia for the US Nuclear Regulatory Commission in support of the NUREG-1150 study. The accident progression model allows complex interactions and dependencies between systems to be explicitly considered. Latin Hypecube sampling was used to assess the phenomenological and systemic uncertainties associated with the primary and confinement system responses to the core damage accident. The results of the analysis show that the N Reactor confinement concept provides significant radiological protection for most of the accident progression pathways studied.

  9. Size-dependent distribution of radiocesium in riverbed sediments and its relevance to the migration of radiocesium in river systems after the Fukushima Daiichi Nuclear Power Plant accident.

    Science.gov (United States)

    Tanaka, Kazuya; Iwatani, Hokuto; Sakaguchi, Aya; Fan, Qiaohui; Takahashi, Yoshio

    2015-01-01

    We investigated the particle size distribution of radiocesium in riverbed sediments after the Fukushima Daiichi Nuclear Power Plant accident. Riverbed sediments were collected in the Abukuma River system in Fukushima and Miyagi Prefectures. The collected sediments were separated into 11 fractions, ranging from granular size (>2000 μm) to clay size (<2 μm) fractions. Cesium-137 concentrations were higher in the smaller particle size fractions, possibly reflecting specific surface areas and the mineralogy, in particular the clay mineral content. A gap in (137)Cs concentration was observed between the silt size and sand size fractions of riverbed sediments at downstream sites, whereas riverbed sediments at an upstream site did not show such a concentration gap. It is likely that selective transport of small particles in suspended state from upstream areas resulted in an accumulation of radiocesium in downstream areas.

  10. Termination of light-water reactor core-melt accidents with a chemical core catcher: the core-melt source reduction system (COMSORS)

    Energy Technology Data Exchange (ETDEWEB)

    Forsberg, C.W.; Parker, G.W.; Rudolph, J.C.; Osborne-Lee, I.W. [Oak Ridge National Lab., TN (United States); Kenton, M.A. [Dames and Moore, Westmont, IL (United States)

    1996-09-01

    The Core-Melt Source Reduction System (COMSORS) is a new approach to terminate light-water reactor core melt accidents and ensure containment integrity. A special dissolution glass is placed under the reactor vessel. If core debris is released onto the glass, the glass melts and the debris dissolves into the molten glass, thus creating a homogeneous molten glass. The molten glass, with dissolved core debris, spreads into a wide pool, distributing the heat for removal by radiation to the reactor cavity above or by transfer to water on top of the molten glass. Expected equilibrium glass temperatures are approximately 600 degrees C. The creation of a low-temperature, homogeneous molten glass with known geometry permits cooling of the glass without threatening containment integrity. This report describes the technology, initial experiments to measure key glass properties, and modeling of COMSORS operations.

  11. 列车追尾事故的故障树分析兼谈复杂系统安全%Fault Tree Analysis of Train Crash Accident and Discussion on Safety of Complex Systems

    Institute of Scientific and Technical Information of China (English)

    李志忠

    2011-01-01

    The train crash accident at Wenzhou city was rated as an especially serious accident which happened at the rapid development stage of train transportation in China. Taking train crash accident as the top event, fault tree analysis was conducted to depict the possible reasons and accident modes. The events contributing to train crash accident are discussed from the their nature to preventive measures. From a broader viewpoint, safety issues of the three elements of a complex safety-critical system (hardware, software and human) are addressed along with technological and management strategies and suggestions.%温州动车组追尾事故是我国铁路大发展时期发生的特别重大事故.为更深入了解事故的可能原因,以列车追尾事故为顶事件,开展故障树分析,探讨事故的各种发生模式,剖析造成事故的各种事件,并从宏观的角度讨论了复杂安全关键系统的安全要素和策略,给出了一些建议.

  12. Design and Development of Traffic Accident Pre-warning System Based on iOS%基于 iOS 的交通事故预警系统设计与开发

    Institute of Scientific and Technical Information of China (English)

    王春; 王鸣宇; 吕傲冰; 丁世杰

    2015-01-01

    为解决交通事故产生的道路拥堵和2次事故,设计了基于iOS的交通事故预警系统。通过对不同类型的交通信息进行对比,采用文字和语音作为预警信息。在MyEclipse环境下开发了交通事故管理服务平台并将其应用于Tomcat服务器。使用Objective-C语言进行编程,在Xcode环境下开发了交通事故预警应用程序。%In order to settle road jam and secondary accidents caused by traffic accidents , this paper designs a traffic accident pre -warning system based on iOS .By comparing traffic information of different types, the paper adopts text and voice as pre -warning information.The paper develops a traffic accident management service platform in MyEclipse environment and applies it to Tomcat server .The paper adopts Objective-C language for programming and develops a traffic accident pre -warning program in Xcode environment .

  13. 75 FR 5640 - Pipeline Safety: Implementation of Revised Incident/Accident Report Forms for Distribution...

    Science.gov (United States)

    2010-02-03

    .../Accident Report Forms for Distribution Systems, Gas Transmission and Gathering Systems, and Hazardous... PHMSA`s Revised Incident/Accident Report Forms for Gas Distribution Systems, Gas Transmission and... Transmission and Gathering Systems, and (3) PHMSA Form F 7000-1--Accident Report for Hazardous Liquid...

  14. Violências e acidentes entre adultos mais velhos em comparação aos mais jovens: evidências do Sistema de Vigilância de Violências e Acidentes (VIVA, Brasil Violence and accidents among older and younger adults: evidence from the Surveillance System for Violence and Accidents (VIVA, Brazil

    Directory of Open Access Journals (Sweden)

    Tatiana Chama Borges Luz

    2011-11-01

    Full Text Available Dados do Sistema de Vigilância de Violências e Acidentes (VIVA de 2009 foram utilizados para examinar características sociodemográficas, desfechos e tipos de acidentes e violências que levaram a atendimento em 74 serviços sentinela situados em 23 capitais brasileiras e no Distrito Federal. A análise incluiu 25.201 indivíduos com idade > 20 anos (10,1% com > 60 anos, dos quais 89,3% foram vítimas de acidentes e 11,9% de violências. A hospitalização foi o desfecho de 11,1% dos casos. Em comparação à população geral, observou-se ainda um excesso de homens e da cor da pele não branca entre vítimas de acidentes e, sobretudo, de violência. O perfil desses eventos entre os mais velhos diferiu dos mais jovens (20-59 anos, com destaque para a menor contribuição do álcool, o predomínio de ocorrências no domicílio, a maior importância relativa das quedas e a maior vulnerabilidade a atropelamentos e a agressões por familiares. Políticas para a prevenção de acidentes e violências devem levar em conta as especificidades desses eventos na população mais velha.Data from the Brazilian Surveillance System for Violence and Accidents (VIVA in 2009 were used to examine socio-demographic characteristics, outcomes, and types of accidents and violence treated at 74 sentinel emergency services in 23 Brazilian State capitals and the Federal District. The analysis included 25,201 individuals aged > 20 years (10.1% > 60 years; 89.3% were victims of accidents and 11.9% victims of violence. Hospitalization was the outcome in 11.1% of cases. Compared to the general population, there were more men and non-white individuals among victims of accidents, and especially among victims of violence. As compared to younger adults (20-59 years, accidents and violence against elderly victims showed less association with alcohol, a higher proportion of domestic incidents, more falls and pedestrian accidents, and aggression by family members. Policies for

  15. Design of Artificial Intelligent Recognition System for Traffic Accident Based on Image%基于图像的车祸事故人工智能识别系统的设计

    Institute of Scientific and Technical Information of China (English)

    赵水红

    2016-01-01

    本文结合当前交通车祸监测系统在复杂交通环境下,识别车祸事故的局限性,设计并提出一种基于图像的车祸事故人工智能识别系统,并从系统结构与交通车祸识别计算分析方法等方面对该系统进行分析介绍,同时结合仿真实验结果,对该系统在实际车祸事故识别应用中的作用进行分析研究,以促进在实际中的推广应用。%In this paper, combined with the current traffic accident monitoring system in complex traffic environment, to identify the limitations of the accident, design and put forward a kind of image based artificial intelligence identification system, and from the system structure and traffic accident identification calculation analysis method and other aspects of the system analysis, combined with the simulation results, the system in the actual traffic accident identification applications, to promote the applica-tion in practice.

  16. Honey Bees Modulate Their Olfactory Learning in the Presence of Hornet Predators and Alarm Component.

    Directory of Open Access Journals (Sweden)

    Zhengwei Wang

    Full Text Available In Southeast Asia the native honey bee species Apis cerana is often attacked by hornets (Vespa velutina, mainly in the period from April to November. During the co-evolution of these two species honey bees have developed several strategies to defend themselves such as learning the odors of hornets and releasing alarm components to inform other mates. However, so far little is known about whether and how honey bees modulate their olfactory learning in the presence of the hornet predator and alarm components of honey bee itself. In the present study, we test for associative olfactory learning of A. cerana in the presence of predator odors, the alarm pheromone component isopentyl acetate (IPA, or a floral odor (hexanal as a control. The results show that bees can detect live hornet odors, that there is almost no association between the innately aversive hornet odor and the appetitive stimulus sucrose, and that IPA is less well associated with an appetitive stimulus when compared with a floral odor. In order to imitate natural conditions, e.g. when bees are foraging on flowers and a predator shows up, or alarm pheromone is released by a captured mate, we tested combinations of the hornet odor and floral odor, or IPA and floral odor. Both of these combinations led to reduced learning scores. This study aims to contribute to a better understanding of the prey-predator system between A. cerana and V. velutina.

  17. Damage alarming of long-span suspension bridge based on GPS-RTK monitoring

    Institute of Scientific and Technical Information of China (English)

    缪长青; 王蔓; 田洪金; 冯兆祥; 陈策

    2015-01-01

    Structure damage identification and alarming of long-span bridge were conducted with three-dimensional dynamic displacement data collected by GPS subsystem of health monitoring system on Runyang Suspension Bridge. First, the effects of temperature on the main girder spatial position coordinates were analyzed from the transverse, longitudinal and vertical directions of bridge, and the correlation regression models were built between temperature and the position coordinates of main girder in the longitudinal and vertical directions; then the alarming indices of coordinate residuals were conducted, and the mean-value control chart was applied to making statistical pattern identification for abnormal changes of girder dynamic coordinates; and finally, the structural damage alarming method of main girder was established. Analysis results show that temperature has remarkable correlation with position coordinates in the longitudinal and vertical directions of bridge, and has weak correlation with the transverse coordinates. The 3% abnormal change of the longitudinal coordinates and 5% abnormal change of the vertical ones caused by structural damage are respectively identified by the mean-value control chart method based on GPS dynamic monitoring data and hence the structural abnormalities state identification and damage alarming for main girder of long-span suspension bridge can be realized in multiple directions.

  18. Alarm Variables for Dengue Outbreaks: A Multi-Centre Study in Asia and Latin America.

    Directory of Open Access Journals (Sweden)

    Leigh R Bowman

    Full Text Available Worldwide, dengue is an unrelenting economic and health burden. Dengue outbreaks have become increasingly common, which place great strain on health infrastructure and services. Early warning models could allow health systems and vector control programmes to respond more cost-effectively and efficiently.The Shewhart method and Endemic Channel were used to identify alarm variables that may predict dengue outbreaks. Five country datasets were compiled by epidemiological week over the years 2007-2013. These data were split between the years 2007-2011 (historic period and 2012-2013 (evaluation period. Associations between alarm/ outbreak variables were analysed using logistic regression during the historic period while alarm and outbreak signals were captured during the evaluation period. These signals were combined to form alarm/ outbreak periods, where 2 signals were equal to 1 period. Alarm periods were quantified and used to predict subsequent outbreak periods. Across Mexico and Dominican Republic, an increase in probable cases predicted outbreaks of hospitalised cases with sensitivities and positive predictive values (PPV of 93%/ 83% and 97%/ 86% respectively, at a lag of 1-12 weeks. An increase in mean temperature ably predicted outbreaks of hospitalised cases in Mexico and Brazil, with sensitivities and PPVs of 79%/ 73% and 81%/ 46% respectively, also at a lag of 1-12 weeks. Mean age was predictive of hospitalised cases at sensitivities and PPVs of 72%/ 74% and 96%/ 45% in Mexico and Malaysia respectively, at a lag of 4-16 weeks.An increase in probable cases was predictive of outbreaks, while meteorological variables, particularly mean temperature, demonstrated predictive potential in some countries, but not all. While it is difficult to define uniform variables applicable in every country context, the use of probable cases and meteorological variables in tailored early warning systems could be used to highlight the occurrence of dengue

  19. WSPEEDI (worldwide version of SPEEDI): A computer code system for the prediction of radiological impacts on Japanese due to a nuclear accident in foreign countries

    Energy Technology Data Exchange (ETDEWEB)

    Chino, Masamichi; Yamazawa, Hiromi; Nagai, Haruyasu; Moriuchi, Shigeru [Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment; Ishikawa, Hirohiko

    1995-09-01

    A computer code system has been developed for near real-time dose assessment during radiological emergencies. The system WSPEEDI, the worldwide version of SPEEDI (System for Prediction of Environmental Emergency Dose Information) aims at predicting the radiological impact on Japanese due to a nuclear accident in foreign countries. WSPEEDI consists of a mass-consistent wind model WSYNOP for large-scale wind fields and a particle random walk model GEARN for atmospheric dispersion and dry and wet deposition of radioactivity. The models are integrated into a computer code system together with a system control software, worldwide geographic database, meteorological data processor and graphic software. The performance of the models has been evaluated using the Chernobyl case with reliable source terms, well-established meteorological data and a comprehensive monitoring database. Furthermore, the response of the system has been examined by near real-time simulations of the European Tracer Experiment (ETEX), carried out over about 2,000 km area in Europe. (author).

  20. Summary of a workshop on severe accident management for BWRs

    Energy Technology Data Exchange (ETDEWEB)

    Kastenberg, W.E. [ed.; Apostolakis, G.; Jae, M.; Milici, T.; Park, H.; Xing, L.; Dhir, V.K.; Lim, H.; Okrent, D.; Swider, J.; Yu, D. [California Univ., Los Angeles, CA (United States). Dept. of Mechanical, Aerospace and Nuclear Engineering

    1991-11-01

    Severe accident management can be defined as the use of existing and/or alternative resources, systems and actions to prevent or mitigate a core-melt accident. For each accident sequence and each combination of strategies there may be several options available to the operator; and each involves phenomenological and operational considerations regarding uncertainty. Operational uncertainties include operator, system and instrument behavior during an accident. During the period September 26--28, 1990, a workshop was held at the University of California, Los Angeles, to address these uncertainties for Boiling Water Reactors (BWRs). This report contains a summary of the workshop proceedings.

  1. A framework for the assessment of severe accident management strategies

    Energy Technology Data Exchange (ETDEWEB)

    Kastenberg, W.E. [ed.; Apostolakis, G.; Dhir, V.K. [California Univ., Los Angeles, CA (United States). Dept. of Mechanical, Aerospace and Nuclear Engineering] [and others

    1993-09-01

    Severe accident management can be defined as the use of existing and/or altemative resources, systems and actors to prevent or mitigate a core-melt accident. For each accident sequence and each combination of severe accident management strategies, there may be several options available to the operator, and each involves phenomenological and operational considerations regarding uncertainty. Operational uncertainties include operator, system and instrumentation behavior during an accident. A framework based on decision trees and influence diagrams has been developed which incorporates such criteria as feasibility, effectiveness, and adverse effects, for evaluating potential severe accident management strategies. The framework is also capable of propagating both data and model uncertainty. It is applied to several potential strategies including PWR cavity flooding, BWR drywell flooding, PWR depressurization and PWR feed and bleed.

  2. APRI-6. Accident Phenomena of Risk Importance

    Energy Technology Data Exchange (ETDEWEB)

    Garis, Ninos; Ljung, J (eds.) (Swedish Radiation Safety Authority, Stockholm (Sweden)); Agrenius, Lennart (ed.) (Agrenius Ingenjoersbyraa AB, Stockholm (Sweden))

    2009-06-15

    Since the early 1980s, nuclear power utilities in Sweden and the Swedish Radiation Safety Authority (SSM) collaborate on the research in severe reactor accidents. In the beginning focus was mostly on strengthening protection against environmental impacts after a severe reactor accident, for example by develop systems for the filtered relief of the reactor containment. Since the early 90s, this focus has shifted to the phenomenological issues of risk-dominant significance. During the years 2006-2008, the partnership continued in the research project APRI-6. The aim was to show whether the solutions adopted in the Swedish strategy for incident management provides adequate protection for the environment. This is done by studying important phenomena in the core melt estimating the amount of radioactivity that can be released to the atmosphere in a severe accident. To achieve these objectives the research has included monitoring of international research on severe accidents and evaluation of results and continued support for research of severe accidents at the Royal Inst. of Technology (KTH) and Chalmers University. The follow-up of international research has promoted the exchange of knowledge and experience and has given access to a wealth of information on various phenomena relevant to events in severe accidents. The continued support to KTH has provided increased knowledge about the possibility of cooling the molten core in the reactor tank and the processes associated with coolability in the confinement and about steam explosions. Support for Chalmers has increased knowledge of the accident chemistry, mainly the behavior of iodine and ruthenium in the containment after an accident.

  3. Severe accident risks from external events

    Institute of Scientific and Technical Information of China (English)

    Randall O Gauntt

    2013-01-01

    This paper reviews the early development of design requirements for seismic events in USA early developing nuclear electric generating fleet.Notable safety studies,including WASH-1400,Sandia Siting Study and the NUREG-1150 probabilistic risk study,are briefly reviewed in terms of their relevance to extreme accidents arising from seismic and other severe accident initiators.Specific characteristic about the nature of severe accidents in nuclear power plant (NPP) are reviewed along with present day state-of-art analysis methodologies (methods for estimation of leakages and consequences of releases (MELCOR) and MELCOR accident consequence code system (MACCS)) that are used to evaluate severe accidents and to optimize mitigative and protective actions against such accidents.It is the aim of this paper to make nuclear operating nations aware of the risks that accompany a much needed energy resource and to identify some of the tools,techniques and landmark safety studies that serve to make the technology safer and to maintain vigilance and adequate safety culture for the responsible management of this valuable but unforgiving technology.

  4. Quantitative Index and Abnormal Alarm Strategy Using Sensor-Dependent Vibration Data for Blade Crack Identification in Centrifugal Booster Fans

    Directory of Open Access Journals (Sweden)

    Jinglong Chen

    2016-05-01

    Full Text Available Centrifugal booster fans are important equipment used to recover blast furnace gas (BFG for generating electricity, but blade crack faults (BCFs in centrifugal booster fans can lead to unscheduled breakdowns and potentially serious accidents, so in this work quantitative fault identification and an abnormal alarm strategy based on acquired historical sensor-dependent vibration data is proposed for implementing condition-based maintenance for this type of equipment. Firstly, three group dependent sensors are installed to acquire running condition data. Then a discrete spectrum interpolation method and short time Fourier transform (STFT are applied to preliminarily identify the running data in the sensor-dependent vibration data. As a result a quantitative identification and abnormal alarm strategy based on compound indexes including the largest Lyapunov exponent and relative energy ratio at the second harmonic frequency component is proposed. Then for validation the proposed blade crack quantitative identification and abnormality alarm strategy is applied to analyze acquired experimental data for centrifugal booster fans and it has successfully identified incipient blade crack faults. In addition, the related mathematical modelling work is also introduced to investigate the effects of mistuning and cracks on the vibration features of centrifugal impellers and to explore effective techniques for crack detection.

  5. Quantitative Index and Abnormal Alarm Strategy Using Sensor-Dependent Vibration Data for Blade Crack Identification in Centrifugal Booster Fans.

    Science.gov (United States)

    Chen, Jinglong; Sun, Hailiang; Wang, Shuai; He, Zhengjia

    2016-05-09

    Centrifugal booster fans are important equipment used to recover blast furnace gas (BFG) for generating electricity, but blade crack faults (BCFs) in centrifugal booster fans can lead to unscheduled breakdowns and potentially serious accidents, so in this work quantitative fault identification and an abnormal alarm strategy based on acquired historical sensor-dependent vibration data is proposed for implementing condition-based maintenance for this type of equipment. Firstly, three group dependent sensors are installed to acquire running condition data. Then a discrete spectrum interpolation method and short time Fourier transform (STFT) are applied to preliminarily identify the running data in the sensor-dependent vibration data. As a result a quantitative identification and abnormal alarm strategy based on compound indexes including the largest Lyapunov exponent and relative energy ratio at the second harmonic frequency component is proposed. Then for validation the proposed blade crack quantitative identification and abnormality alarm strategy is applied to analyze acquired experimental data for centrifugal booster fans and it has successfully identified incipient blade crack faults. In addition, the related mathematical modelling work is also introduced to investigate the effects of mistuning and cracks on the vibration features of centrifugal impellers and to explore effective techniques for crack detection.

  6. Power System Fault Diagnosis Considering Absence of Alarm Messages of Circuit Breakers on the Border of Outage Area%停电区域边界断路器信息缺失时的电网故障诊断

    Institute of Scientific and Technical Information of China (English)

    王磊; 陈青; 李天友; 高湛军; 李兆飞

    2013-01-01

      当电网中的元件发生故障,相关保护会跳开断路器以切断故障电流,最终形成一个或多个停电区域。如果将可疑故障元件限定在停电区域内,故障诊断程序的效率会得到很大的提升。然而在调度中心收到的跳闸断路器信息有缺失的情况下,由于无法形成停电区域,故障诊断程序只能对电网中所有元件逐一进行诊断,并且还容易造成对故障元件的漏判。针对断路器报警信息丢失的情况,从图论角度出发,以点割集算法为基础划分出多个可能包含故障元件的无源区域,然后通过skyline多目标优化查询方法,对这些无源区域按可疑元件查准率由高到低的顺序进行排列,并提供给故障诊断程序,保证了诊断速度的同时,能够防止故障元件的漏判。最后使用Petri网为诊断工具,以故障诊断算例验证了该方法的有效性。%When a fault takes place on a section in a power grid, the corresponding protective relays will trip the related circuit breakers to cut off the fault current. As a result, one or more outage areas would be formed. If the faulty section is restricted in the outage area, the efficiency of fault diagnosis program will be greatly promoted. On the other side, if the control center can not receive the whole alarm message of circuit beakers, all of the sections must be diagnosed because the outrage area can not be gotten. Furthermore, wrong diagnosis results may be gotten because of the missing of alarm messages. Given this back ground, based on graph theory, one or more outrage area can be partitioned by cut-set of nodes. Multi-objective optimization method skyline query was applied to sort the outrage area decreasingly based on the precision rate of fault section. The developed diagnosis method could make the diagnosis program much faster, and can insure the fault section will not be omitted. Petri net was applied as the diagnosis tool

  7. Road Traffic Accidents - The Number One Killer in Libya

    Directory of Open Access Journals (Sweden)

    Abdulmajid Ahmed Ali

    2007-01-01

    Full Text Available To The Editor: It is estimated that 1.26 million people worldwide died in 2000 from road traffic accidents, 90% of them in low and middle-income countries. In 2000, the road traffic injury mortality rate for the world was 20.8 per 100,000 populations (30.8 in males, 11.0 in females [1].The Arab population constitutes 3.6% of the world’s population and it owns 1% of the world’s vehicles. Its human losses as a result of road traffic accidents (RTA account for 4.8% of that of the world’s losses [2]. It is estimated that the annual cost of road crashes is about 1% of the Gross National Product (GNP in developing countries, 1.5 in transitional countries and 2% in highly motorised countries [3].In Libya the situation is worse. It is a sad fact that road traffic accidents are the number one killer in Libya. As a matter of fact I consider it to be an ‘epidemic’ in all sectors of the Libyan society. There is not a day that goes by in Libya without us hearing about families, young men, women and children getting killed in horrific car accidents.It is alarming that young children are knocked down on a daily basis by speeding young drivers, whose understanding of driving skills may have been acquired from "playstation games"! (You can watch some of the shameful video clips sent by some of these drivers on this link http://www.youtube.com/watch?v=doWEDjiHlVoI feel it is our responsibility as physicians observing the situation to raise awareness about the scale of the problem, possible causes, and how to tackle it. POSSIBLE CAUSES:• A driving licence in Libya is not issued on the basis of how much you know. Therefore the majority of drivers know little or nothing about the law.• Wearing seat belts is not compulsory in most parts of Libya. In some places, especially in the Eastern part of Libya, you could be penalised for wearing one. I was stopped many years ago by the traffic police in the Eastern part of Libya because I was wearing sunglasses

  8. 基于ZigBee无线传输的果园机车防撞防倾翻预警系统%Anti-collision and anti-tipping pre-alarm system of orchard picker based on ZigBee wireless transmission

    Institute of Scientific and Technical Information of China (English)

    杨柳; 穆浩淼; 邓钧文; 宋雨瑶; 刘武

    2014-01-01

    Exploitation of orchard fruit picking locomotive has broad prospects and brings huge economic interests. Meanwhile, China has more complex terrains for orchard distribution, such as plain, hill and terraced hillside, which bring a big security risk for safe and stable driving of orchard locomotive. In order to monitor and prevent tipping, obstacle distance system is particularly important for orchard locomotives in its walking and picking process in the orchard. At present, most pre-alarm system researches are about anti-collision for heavy-duty vehicles or locomotives. There is no system on small vehicles in the orchard, which is working on complex terrain and whose quality is unevenly distributed in the process of moving. This article studies this anti-collision and anti-tipping pre-alarm system of orchard locomotive for further research and improvement. While orchard picker is operating in the orchard, collision and tipping happens easily due to the obstacles and rugged land, which brings danger to the orchard locomotive. In order to give accurate early warning about collision and tipping and ensure to operate orchard picker stably and reliably, this article presents the pre-warning system of anti-rollover collision based on ZigBee wireless transmission. The designed ZigBee wireless network is based on CC2530. The end device collects data from ultrasonic sensor module and spoke type pressure sensors. The design uses a pressure sensor to measure positive pressure between the body and the ground to give rollover warning by comparing with rollover threshold, and uses lateral load transfer ratio (LTR) as an indicator to determine the stability of locomotive tipping. Through the network, the sensor data is sent to the coordinator and then transferred to the computer via RS232 serial port. Alarm is working after the comparison between obtained data and the threshold value. Wireless data transmission test shows that the pre-alarm device realizes the alarm when LTR is 0

  9. Radiation management at the occurrence of accident and restoration works. Fire and explosion of asphalt solidification processing facility

    Energy Technology Data Exchange (ETDEWEB)

    Miyabe, Kenjiro; Jin, K.; Namiki, A.; Mizutani, K.; Horiuchi, N.; Saruta, J. [Power Reactor and Nuclear Fuel Development Corp., Health and Safety Division, Tokai, Ibaraki (Japan); Ninomiya, Kazushige [Power Reactor and Nuclear Fuel Development Corp., Tsuruga, Fukui (Japan). Monju Construction Office

    1998-06-01

    Fire and explosion accident in the cell of Asphalt Solidification Processing Facility(ASP) in PNC took placed at March 11 in 1997. Following to the alarm of many radiation monitoring system in the facility, some of workers inhale radioactive materials in their bodies. Indication values of an exhaust monitor installed in the first auxiliary exhaust stack increased suddenly. A large number of windows, doors, and shutters in the facility were raptured by the explosion. A lot of radioactive materials blew up and were released to the outside of the facility. Reinforcement of radiation surveillance function, nose smearing test for the workers and confirmation of contamination situation were implemented on the fire. Investigation of radiation situation, radiation management on the site, exposure management for the workers, surveillance of exhaustion, and restoration works of the damaged radiation management monitoring system were carried out after the explosion. The detailed data of radiation management measures taken during three months after the accident are described in the paper. (M. Suetake)

  10. Analysis of National Major Work Safety Accidents in China, 2003–2012

    Science.gov (United States)

    YE, Yunfeng; ZHANG, Siheng; RAO, Jiaming; WANG, Haiqing; LI, Yang; WANG, Shengyong; DONG, Xiaomei

    2016-01-01

    Background: This study provides a national profile of major work safety accidents in China, which cause more than 10 fatalities per accident, intended to provide scientific basis for prevention measures and strategies to reduce major work safety accidents and deaths. Methods: Data from 2003–2012 Census of major work safety accidents were collected from State Administration of Work Safety System (SAWS). Published literature and statistical yearbook were also included to implement information. We analyzed the frequency of accidents and deaths, trend, geographic distribution and injury types. Additionally, we discussed the severity and urgency of emergency rescue by types of accidents. Results: A total of 877 major work safety accidents were reported, resulting in 16,795 deaths and 9,183 injuries. The numbers of accidents and deaths, mortality rate and incidence of major accidents have declined in recent years. The mortality rate and incidence was 0.71 and 1.20 per 106 populations in 2012, respectively. Transportation and mining contributed to the highest number of major accidents and deaths. Major aviation and railway accidents caused more casualties per incident, while collapse, machinery, electrical shock accidents and tailing dam accidents were the most severe situation that resulted in bigger proportion of death. Conclusion: Ten years’ major work safety accident data indicate that the frequency of accidents and number of eaths was declined and several safety concerns persist in some segments. PMID:27057515

  11. Computer system for the assessment of radiation situation in the cases of radiological accidents and extreme weather conditions in the Chernobyl exclusion zone

    Energy Technology Data Exchange (ETDEWEB)

    Talerko, M.; Garger, E.; Kuzmenko, A. [Institute for Safety Problems of Nuclear Power Plants (Ukraine)

    2014-07-01

    Radiation situation within the Chernobyl Exclusion Zone (ChEZ) is determined by high radionuclides contamination of the land surface formed after the 1986 accident, as well as the presence of a number of potentially hazardous objects (the 'Shelter' object, the Interim Spent Nuclear Fuel Dry Storage Facility ISF-1, radioactive waste disposal sites, radioactive waste temporary localization sites etc.). The air concentration of radionuclides over the ChEZ territory and radiation exposure of personnel are influenced by natural and anthropogenic factors: variable weather conditions, forest fires, construction and excavation activity etc. The comprehensive radiation monitoring and early warning system in the ChEZ was established under financial support of European Commission in 2011. It involves the computer system developed for assessment and prediction of radiological emergencies consequences in the ChEZ ensuring the protection of personnel and the population living near its borders. The system assesses radiation situation under both normal conditions in the ChEZ and radiological emergencies which result in considerable radionuclides emission into the air (accidents at radiation hazardous objects, extreme weather conditions). Three different types of radionuclides release sources can be considered in the software package. So it is based on a set of different models of emission, atmospheric transport and deposition of radionuclides: 1) mesoscale model of radionuclide atmospheric transport LEDI for calculations of the radionuclides emission from stacks and buildings; 2) model of atmospheric transport and deposition of radionuclides due to anthropogenic resuspension from contaminated area (area surface source model) as a result of construction and excavation activity, heavy traffic etc.; 3) model of resuspension, atmospheric transport and deposition of radionuclides during grassland and forest fires in the ChEZ. The system calculates the volume and surface

  12. Early warnings and missed alarms for abrupt monsoon transitions

    Science.gov (United States)

    Thomas, Z. A.; Kwasniok, F.; Boulton, C. A.; Cox, P. M.; Jones, R. T.; Lenton, T. M.; Turney, C. S. M.

    2015-12-01

    Palaeo-records from China demonstrate that the East Asian Summer Monsoon (EASM) is dominated by abrupt and large magnitude monsoon shifts on millennial timescales, switching between periods of high and weak monsoon rains. It has been hypothesized that over these timescales, the EASM exhibits two stable states with bifurcation-type tipping points between them. Here we test this hypothesis by looking for early warning signals of past bifurcations in speleothem δ18O records from Sanbao Cave and Hulu Cave, China, spanning the penultimate glacial cycle. We find that although there are increases in both autocorrelation and variance preceding some of the monsoon transitions during this period, it is only immediately prior to the abrupt monsoon shift at the penultimate deglaciation (Termination II) that statistically significant increases are detected. To supplement our data analysis, we produce and analyse multiple model simulations that we derive from these data. We find hysteresis behaviour in our model simulations with transitions directly forced by solar insolation. However, signals of critical slowing down, which occur on the approach to a bifurcation, are only detectable in the model simulations when the change in system stability is sufficiently slow to be detected by the sampling resolution of the data set. This raises the possibility that the early warning "alarms" were missed in the speleothem data over the period 224-150 kyr and it was only at the monsoon termination that the change in the system stability was sufficiently slow to detect early warning signals.

  13. Severe Accident Recriticality Analyses (SARA)

    Energy Technology Data Exchange (ETDEWEB)

    Frid, W. [Swedish Nuclear Power Inspectorate, Stockholm (Sweden); Hoejerup, F. [Risoe National Lab. (Denmark); Lindholm, I.; Miettinen, J.; Puska, E.K. [VTT Energy, Helsinki (Finland); Nilsson, Lars [Studsvik Eco and Safety AB, Nykoeping (Sweden); Sjoevall, H. [Teoliisuuden Voima Oy (Finland)

    1999-11-01

    Recriticality in a BWR has been studied for a total loss of electric power accident scenario. In a BWR, the B{sub 4}C control rods would melt and relocate from the core before the fuel during core uncovery and heat-up. If electric power returns during this time-window unborated water from ECCS systems will start to reflood the partly control rod free core. Recriticality might take place for which the only mitigating mechanisms are the Doppler effect and void formation. In order to assess the impact of recriticality on reactor safety, including accident management measures, the following issues have been investigated in the SARA project: 1. the energy deposition in the fuel during super-prompt power burst, 2. the quasi steady-state reactor power following the initial power burst and 3. containment response to elevated quasi steady-state reactor power. The approach was to use three computer codes and to further develop and adapt them for the task. The codes were SIMULATE-3K, APROS and RECRIT. Recriticality analyses were carried out for a number of selected reflooding transients for the Oskarshamn 3 plant in Sweden with SIMULATE-3K and for the Olkiluoto 1 plant in Finland with all three codes. The core state initial and boundary conditions prior to recriticality have been studied with the severe accident codes SCDAP/RELAP5, MELCOR and MAAP4. The results of the analyses show that all three codes predict recriticality - both superprompt power bursts and quasi steady-state power generation - for the studied range of parameters, i. e. with core uncovery and heat-up to maximum core temperatures around 1800 K and water flow rates of 45 kg/s to 2000 kg/s injected into the downcomer. Since the recriticality takes place in a small fraction of the core the power densities are high which results in large energy deposition in the fuel during power burst in some accident scenarios. The highest value, 418 cal/g, was obtained with SIMULATE-3K for an Oskarshamn 3 case with reflooding

  14. Aid system in the attention direction for accidents diagnosis at nuclear power plants based on artificial intelligence; Sistema de auxilio para o direcionamento da atencao no diagnostico de acidentes em usinas nucleares baseado em inteligencia artificial

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Rafael Gomes da

    2009-07-01

    Transient identification in Nuclear Power Plant (NPP) is often a very hard task and may involve a great amount of human cognition. The early identification of unexpected departures from steady state behavior is an essential step for the operation, control and accident management in NPPs. The bases for the transient identification relay on the evidence that different system faults and anomalies lead to different pattern evolution in the involved process variables. During an abnormal event, the operator must monitor a great amount of information from the instruments that represents a specific type of event Several systems based on specialist systems, neural-networks, and fuzzy logic have been developed for transient identification. In the work, we investigate the possibility of using a Neuro Fuzzy modeling tool for efficient transient identification, aiming to helping the operator crew to take decisions relative to the procedure to be followed in situations of accidents/transients at NPPs. The proposed system uses artificial neural networks (ANN) as first level transient diagnostic After the ANN has done the preliminary transient type identification, a fuzzy-logic system analyzes the results emitting reliability degree of it. A preliminary evaluation of the developed system was made at the Human-System Interface Laboratory (LABIHS). The obtained results show that the system can help the operators to take decisions during transients/accidents in the plant (author)

  15. Monitoring techniques and alarm procedures for CMS services and sites in WLCG

    CERN Document Server

    Molina-Perez, Jorge Amando

    2012-01-01

    The CMS offline computing system is composed of roughly 80 sites (including most experienced T3s) and a number of central services to distribute, process and analyze data worldwide. A high level of stability and reliability is required from the underlying infrastructure and services, partially covered by local or automated monitoring and alarming systems such as Lemon and SLS; the former collects metrics from sensors installed on computing nodes and triggers alarms when values are out of range, the latter measures the quality of service and warns managers when service is affected. CMS has established computing shift procedures with personnel operating worldwide from remote Computing Centers, under the supervision of the Computing Run Coordinator on duty at CERN. This dedicated 24/7 computing shift personnel is contributing to detect and react timely on any unexpected error and hence ensure that CMS workflows are carried out efficiently and in a sustained manner. Synergy among all the involved actors is explo...

  16. Attributions of cancer 'alarm' symptoms in a community sample.

    Directory of Open Access Journals (Sweden)

    Katriina L Whitaker

    Full Text Available BACKGROUND: Attribution of early cancer symptoms to a non-serious cause may lead to longer diagnostic intervals. We investigated attributions of potential cancer 'alarm' and non-alarm symptoms experienced in everyday life in a community sample of adults, without mention of a cancer context. METHODS: A questionnaire was mailed to 4858 adults (≥50 years old, no cancer diagnosis through primary care, asking about symptom experiences in the past 3 months. The word cancer was not mentioned. Target 'alarm' symptoms, publicised by Cancer Research UK, were embedded in a longer symptom list. For each symptom experienced, respondents were asked for their attribution ('what do you think caused it', concern about seriousness ('not at all' to 'extremely', and help-seeking ('did you contact a doctor about it': Yes/No. RESULTS: The response rate was 35% (n = 1724. Over half the respondents (915/1724; 53% had experienced an 'alarm' symptom, and 20 (2% cited cancer as a possible cause. Cancer attributions were highest for 'unexplained lump'; 7% (6/87. Cancer attributions were lowest for 'unexplained weight loss' (0/47. A higher proportion (375/1638; 23% were concerned their symptom might be 'serious', ranging from 12% (13/112 for change in a mole to 41% (100/247 for unexplained pain. Just over half had contacted their doctor about their symptom (59%, although this varied by symptom. Alarm symptoms were appraised as more serious than non-alarm symptoms, and were more likely to trigger help-seeking. CONCLUSIONS: Consistent with retrospective reports from cancer patients, 'alarm' symptoms experienced in daily life were rarely attributed to cancer. These results have implications for understanding how people appraise and act on symptoms that could be early warning signs of cancer.

  17. Accident Safety Design for High Speed Elevator

    Directory of Open Access Journals (Sweden)

    Tawiwat Veeraklaew

    2012-12-01

    Full Text Available There have been many elevators exist in buildings for such a long time; however, an accident might happen as a free fall due to lacks of maintenance or some other accident such as firing. Although this situation is rarely occurred, many people are still concerned about it. The question here is how to make passengers to feel safe and confident when they are using an elevator, especially, high speed elevator. This problem is studied here in this paper as a free fall spring-mass-damper system with the stiffness and damping coefficient can be computed as minimum jerk of the system with given constraints on trajectories.

  18. Reconfigurable mobile manipulation for accident response

    Energy Technology Data Exchange (ETDEWEB)

    ANDERSON,ROBERT J.; MORSE,WILLIAM D.; SHIREY,DAVID L.; CDEBACA,DANIEL M.; HOFFMAN JR.,JOHN P.; LUCY,WILLIAM E.

    2000-06-06

    The need for a telerobotic vehicle with hazard sensing and integral manipulation capabilities has been identified for use in transportation accidents where nuclear weapons are involved. The Accident Response Mobile Manipulation System (ARMMS) platform has been developed to provide remote dexterous manipulation and hazard sensing for the Accident Response Group (ARG) at Sandia National Laboratories. The ARMMS' mobility platform is a military HMMWV [High Mobility Multipurpose Wheeled Vehicle] that is teleoperated over RF or Fiber Optic communication channels. ARMMS is equipped with two high strength Schilling Titan II manipulators and a suite of hazardous gas and radiation sensors. Recently, a modular telerobotic control architecture call SMART (Sandia Modular Architecture for Robotic and Teleoperation) has been applied to ARMMS. SMART enables input devices and many system behaviors to be rapidly configured in the field for specific mission needs. This paper summarizes current SMART developments applied to ARMMS.

  19. Early warnings and missed alarms for abrupt monsoon transitions

    Directory of Open Access Journals (Sweden)

    Z. A. Thomas

    2015-04-01

    Full Text Available Palaeo-records from China (Cheng et al., 2009; Wang et al., 2008, 2001 demonstrate the East Asian Summer Monsoon (EASM is dominated by abrupt and large magnitude monsoon shifts on millennial timescales, switching between periods of high and weak monsoon rains. It has been hypothesised that over these timescales, the EASM exhibits two stable states with bifurcation-type tipping points between them (Schewe et al., 2012. Here we test this hypothesis by looking for early warning signals of past bifurcations in speleothem records from Sanbao Cave and Hulu Cave, China (Wang et al., 2008, 2001, spanning the penultimate glacial cycle, and in multiple model simulations derived from the data. We find hysteresis behaviour in our model simulations with transitions directly forced by solar insolation. We detect critical slowing down prior to an abrupt monsoon shift during the penultimate deglaciation consistent with long-term orbital forcing. However, such signals are only detectable when the change in system stability is sufficiently slow to be detected by the sampling resolution of the dataset, raising the possibility that the alarm was missed and a similar forcing drove earlier EASM shifts.

  20. Interdisciplinary safety analysis of complex socio-technological systems based on the functional resonance accident model: An application to railway trafficsupervision

    Energy Technology Data Exchange (ETDEWEB)

    Belmonte, Fabien, E-mail: fabien.belmonte@transport.alstom.co [Alstom Transport, 48 rue Albert Dhalenne, 93482 Saint-Ouen cedex (France); Schoen, Walter [Universite de Technologie de Compiegne, Laboratoire Heudiasyc, Centre de Recherches de Royallieu, BP20529, 60205 Compiegne cedex (France); Heurley, Laurent [Universite de Picardie Jules Verne, Equipe Cognition, Langage, Emotion et Acquisition (CLEA), EA 4296, UFR de Philosophie, Sciences Humaines et Sociales, Chemin du Thil, 80025 Amiens, Cedex 1 (France); Capel, Robert [Alstom Transport, 48 rue Albert Dhalenne, 93482 Saint-Ouen cedex (France)

    2011-02-15

    This paper presents an application of functional resonance accident models (FRAM) for the safety analysis of complex socio-technological systems, i.e. systems which include not only technological, but also human and organizational components. The supervision of certain industrial domains provides a good example of such systems, because although more and more actions for piloting installations are now automatized, there always remains a decision level (at least in the management of degraded modes) involving human behavior and organizations. The field of application of the study presented here is railway traffic supervision, using modern automatic train supervision (ATS) systems. Examples taken from railway traffic supervision illustrate the principal advantage of FRAM in comparison to classical safety analysis models, i.e. their ability to take into account technical as well as human and organizational aspects within a single model, thus allowing a true multidisciplinary cooperation between specialists from the different domains involved. A FRAM analysis is used to interpret experimental results obtained from a real ATS system linked to a railway simulator that places operators (experimental subjects) in simulated situations involving incidents. The first results show a significant dispersion in performances among different operators when detecting incidents. Some subsequent work in progress aims to make these 'performance conditions' more homogeneous, mainly by ergonomic modifications. It is clear that the current human-machine interface (HMI) in ATS systems (a legacy of past technologies that used LED displays) has reached its limits and needs to be improved, for example, by highlighting the most pertinent information for a given situation (and, conversely, by removing irrelevant information likely to distract operators).

  1. Video Surveillance System for Elderly Person Living Alone by Person Tracking and Fall Detection

    Science.gov (United States)

    Doi, Motonori; Inoue, Hiroshi; Aoki, Yutaro; Oshiro, Osamu

    The detection of accidents on elderly person living alone and the communication between the elderly person and his/her family are very important. This paper describes a new method for tracking and fall detection of elderly person using omni-directional image sensor, and the Itawari-kan communication system that supports their communications and gives alarms for detected accidents on the elderly person. This system tracks the person's head position in real-time by image processing on images captured by some omni-directional image sensor. Then, the system transmits the information of the detected head position to another site. The computer of recipient site generates the computer graphics animation of the tracked person and displays the animation on a monitor. When the system detects an accident from the head position, the system gives an alarm. This method reduces traffic on network and keeps the privacy for the tracked person. We made a prototype system of the Itawari-kan communication system. Experiments on the system showed good feasibility of the proposed system.

  2. Utilization of accident databases and fuzzy sets to estimate frequency of HazMat transport accidents.

    Science.gov (United States)

    Qiao, Yuanhua; Keren, Nir; Mannan, M Sam

    2009-08-15

    Risk assessment and management of transportation of hazardous materials (HazMat) require the estimation of accident frequency. This paper presents a methodology to estimate hazardous materials transportation accident frequency by utilizing publicly available databases and expert knowledge. The estimation process addresses route-dependent and route-independent variables. Negative binomial regression is applied to an analysis of the Department of Public Safety (DPS) accident database to derive basic accident frequency as a function of route-dependent variables, while the effects of route-independent variables are modeled by fuzzy logic. The integrated methodology provides the basis for an overall transportation risk analysis, which can be used later to develop a decision support system.

  3. Wild birds learn to eavesdrop on heterospecific alarm calls.

    Science.gov (United States)

    Magrath, Robert D; Haff, Tonya M; McLachlan, Jessica R; Igic, Branislav

    2015-08-01

    Many vertebrates gain critical information about danger by eavesdropping on other species' alarm calls [1], providing an excellent context in which to study information flow among species in animal communities [2-4]. A fundamental but unresolved question is how individuals recognize other species' alarm calls. Although individuals respond to heterospecific calls that are acoustically similar to their own, alarms vary greatly among species, and eavesdropping probably also requires learning [1]. Surprisingly, however, we lack studies demonstrating such learning. Here, we show experimentally that individual wild superb fairy-wrens, Malurus cyaneus, can learn to recognize previously unfamiliar alarm calls. We trained individuals by broadcasting unfamiliar sounds while simultaneously presenting gliding predatory birds. Fairy-wrens in the experiment originally ignored these sounds, but most fled in response to the sounds after two days' training. The learned response was not due to increased responsiveness in general or to sensitization following repeated exposure and was independent of sound structure. Learning can therefore help explain the taxonomic diversity of eavesdropping and the refining of behavior to suit the local community. In combination with previous work on unfamiliar predator recognition (e.g., [5]), our results imply rapid spread of anti-predator behavior within wild populations and suggest methods for training captive-bred animals before release into the wild [6]. A remaining challenge is to assess the importance and consequences of direct association of unfamiliar sounds with predators, compared with social learning-such as associating unfamiliar sounds with conspecific alarms.

  4. Status Report on Activities of the Systems Assessment Task Force, OECD-NEA Expert Group on Accident Tolerant Fuels for LWRs

    Energy Technology Data Exchange (ETDEWEB)

    Bragg-Sitton, Shannon Michelle [Idaho National Lab. (INL), Idaho Falls, ID (United States)

    2015-09-01

    The Organization for Economic Cooperation and Development /Nuclear Energy Agency (OECD/NEA) Nuclear Science Committee approved the formation of an Expert Group on Accident Tolerant Fuel (ATF) for LWRs (EGATFL) in 2014. Chaired by Kemal Pasamehmetoglu, INL Associate Laboratory Director for Nuclear Science and Technology, the mandate for the EGATFL defines work under three task forces: (1) Systems Assessment, (2) Cladding and Core Materials, and (3) Fuel Concepts. Scope for the Systems Assessment task force includes definition of evaluation metrics for ATF, technology readiness level definition, definition of illustrative scenarios for ATF evaluation, parametric studies, and selection of system codes. The Cladding and Core Materials and Fuel Concepts task forces will identify gaps and needs for modeling and experimental demonstration; define key properties of interest; identify the data necessary to perform concept evaluation under normal conditions and illustrative scenarios; identify available infrastructure (internationally) to support experimental needs; and make recommendations on priorities. Where possible, considering proprietary and other export restrictions (e.g., International Traffic in Arms Regulations), the Expert Group will facilitate the sharing of data and lessons learned across the international group membership. The Systems Assessment Task Force is chaired by Shannon Bragg-Sitton (INL), while the Cladding Task Force will be chaired by a representative from France (Marie Moatti, Electricite de France [EdF]) and the Fuels Task Force will be chaired by a representative from Japan (Masaki Kurata, Japan Atomic Energy Agency [JAEA]). This report provides an overview of the Systems Assessment Task Force charter and status of work accomplishment.

  5. A New Fuzzy Clustering-Ranking Algorithm and Its Application in Process Alarm Management%一种新的模糊聚类-分级算法及其在流程报警管理中的应用

    Institute of Scientific and Technical Information of China (English)

    朱群雄; 耿志强

    2005-01-01

    Overmany alarms of modern chemical process give the operators many difficulties to decision and diagnosis. In order to ensure safe production and process operating, management and optimization of alarm information are challenge work that must be confronted. A new process alarm management method based on fuzzy clusteringranking algorithm is proposed. The fuzzy clustering algorithm is used to cluster rationally the process variables,and difference driving decision algorithm ranks different clusters and process parameters in every cluster. The alarm signal of higher rank is handled preferentially to manage effectively alarms and avoid blind operation. The validity of proposed algorithm and solution is verified by the practical application of ethylene cracking furnace system. It is an effective and dependable alarm management method to improve operating safety in industrial process.

  6. Lifestyle factors and contact to general practice with respiratory alarm symptoms

    DEFF Research Database (Denmark)

    Sele, Lisa Maria Falk; Elnegaard, Sandra; Balasubramaniam, Kirubakaran

    2016-01-01

    BACKGROUND: A prerequisite for early lung cancer diagnosis is that individuals with respiratory alarm symptoms (RAS) contact a general practitioner (GP). This study aims to determine the proportion of individuals in the general population who contact a GP with RAS and to analyse the association...... between lifestyle factors and contact to GPs with RAS. METHODS: A web-based survey of 100 000 individuals randomly selected from the Danish Civil Registration System. Items regarding experience of RAS (prolonged coughing, shortness of breath, coughing up blood, and prolonged hoarseness), GP contacts......, and lifestyle factors (smoking status, alcohol intake, and body mass index) were included. RESULTS: In total 49 706 (52.5 %) individuals answered the questionnaire. Overall 7870 reported at least one respiratory alarm symptom, and of those 39.6 % (3 080) had contacted a GP. Regarding specific symptoms...

  7. [Multiple injuries in mass accidents].

    Science.gov (United States)

    Wondrák, E

    1984-01-01

    The treatment starts with reanimation, managing the shock, followed by life-saving surgery on the central nervous system, chest, abdomen, large blood vessels and the uropoietic system. From the very beginning the therapy should be conducted on an intradisciplinary basis, first with the anaesthesiologist, later with other specialists as required. Once the patient's life has been saved, treatment of eyes, hands and systematic attention to extremities should follow. Shock has to be managed within 24 hours. Luxations of large joints should be reposed on the date of injury, open fractures closed, all fractures immobilized in favourable position. No extension should be applied in patients suffering from brain injuries; fractures of the femur should be fixed surgically by a second team in the course of the neurosurgical operation. A stomatologist's assistance makes general anaesthesia possible even with fractures of the jaw. In mass accidents the therapeutic plan for the polytraumatized should be fixed on the following day. A mass accident involving 35 injured treated within two and a half hours demonstrates this procedure in 7 polytraumatized persons.

  8. Statistical Study of False Alarms of Geomagnetic Storms

    DEFF Research Database (Denmark)

    Leer, Kristoffer; Vennerstrøm, Susanne; Veronig, A.;

    Coronal Mass Ejections (CMEs) are known to cause geomagnetic storms on Earth. However, not all CMEs will trigger geomagnetic storms, even if they are heading towards the Earth. In this study, front side halo CMEs with speed larger than 500 km/s have been identified from the SOHO LASCO catalogue....... A subset of these halo CMEs did not cause a geomagnetic storm the following four days and have therefore been considered as false alarms. The properties of these events are investigated and discussed here. Their statistics are compared to the geo-effective CMEs. The ability to identify potential false...... alarms is considered as an important factor when forecasting geomagnetic storms. It would therefore be very helpful if there were a signature in the solar data that could indicate that a CME is a false alarm. The strength and position of associated flares have been considered as possible candidates...

  9. A comparison of the hazard perception ability of accident-involved and accident-free motorcycle riders.

    Science.gov (United States)

    Cheng, Andy S K; Ng, Terry C K; Lee, Hoe C

    2011-07-01

    Hazard perception is the ability to read the road and is closely related to involvement in traffic accidents. It consists of both cognitive and behavioral components. Within the cognitive component, visual attention is an important function of driving whereas driving behavior, which represents the behavioral component, can affect the hazard perception of the driver. Motorcycle riders are the most vulnerable types of road user. The primary purpose of this study was to deepen our understanding of the correlation of different subtypes of visual attention and driving violation behaviors and their effect on hazard perception between accident-free and accident-involved motorcycle riders. Sixty-three accident-free and 46 accident-involved motorcycle riders undertook four neuropsychological tests of attention (Digit Vigilance Test, Color Trails Test-1, Color Trails Test-2, and Symbol Digit Modalities Test), filled out the Chinese Motorcycle Rider Driving Violation (CMRDV) Questionnaire, and viewed a road-user-based hazard situation with an eye-tracking system to record the response latencies to potentially dangerous traffic situations. The results showed that both the divided and selective attention of accident-involved motorcycle riders were significantly inferior to those of accident-free motorcycle riders, and that accident-involved riders exhibited significantly higher driving violation behaviors and took longer to identify hazardous situations compared to their accident-free counterparts. However, the results of the regression analysis showed that aggressive driving violation CMRDV score significantly predicted hazard perception and accident involvement of motorcycle riders. Given that all participants were mature and experienced motorcycle riders, the most plausible explanation for the differences between them is their driving style (influenced by an undesirable driving attitude), rather than skill deficits per se. The present study points to the importance of

  10. Occupational accidents aboard merchant ships

    DEFF Research Database (Denmark)

    Hansen, H.L.; Nielsen, D.; Frydenberg, Morten

    2002-01-01

    Objectives: To investigate the frequency, circumstances, and causes of occupational accidents aboard merchant ships in international trade, and to identify risk factors for the occurrence of occupational accidents as well as dangerous working situations where possible preventive measures may...... be initiated. Methods: The study is a historical follow up on occupational accidents among crew aboard Danish merchant ships in the period 1993–7. Data were extracted from the Danish Maritime Authority and insurance data. Exact data on time at risk were available. Results: A total of 1993 accidents were...... rate of accidents than Danish citizens. Age was a major risk factor for accidents causing permanent disability. Change of ship and the first period aboard a particular ship were identified as risk factors. Walking from one place to another aboard the ship caused serious accidents. The most serious...

  11. Development of a new aerosol monitoring system and its application in Fukushima nuclear accident related aerosol radioactivity measurement at the CTBT radionuclide station in Sidney of Canada.

    Science.gov (United States)

    Zhang, Weihua; Bean, Marc; Benotto, Mike; Cheung, Jeff; Ungar, Kurt; Ahier, Brian

    2011-12-01

    A high volume aerosol sampler ("Grey Owl") has been designed and developed at the Radiation Protection Bureau, Health Canada. Its design guidance is based on the need for a low operational cost and reliable sampler to provide daily aerosol monitoring samples that can be used as reference samples for radiological studies. It has been developed to provide a constant air flow rate at low pressure drops (∼3 kPa for a day sampling) with variations of less than ±1% of the full scale flow rate. Its energy consumption is only about 1.5 kW for a filter sampling over 22,000 standard cubic meter of air. It has been demonstrated in this Fukushima nuclear accident related aerosol radioactivity monitoring study at Sidney station, B.C. that the sampler is robust and reliable. The results provided by the new monitoring system have been used to support decision-making in Canada during an emergency response.

  12. Enhanced Accident Tolerant LWR Fuels: Metrics Development

    Energy Technology Data Exchange (ETDEWEB)

    Shannon Bragg-Sitton; Lori Braase; Rose Montgomery; Chris Stanek; Robert Montgomery; Lance Snead; Larry Ott; Mike Billone

    2013-09-01

    The Department of Energy (DOE) Fuel Cycle Research and Development (FCRD) Advanced Fuels Campaign (AFC) is conducting research and development on enhanced Accident Tolerant Fuels (ATF) for light water reactors (LWRs). This mission emphasizes the development of novel fuel and cladding concepts to replace the current zirconium alloy-uranium dioxide (UO2) fuel system. The overall mission of the ATF research is to develop advanced fuels/cladding with improved performance, reliability and safety characteristics during normal operations and accident conditions, while minimizing waste generation. The initial effort will focus on implementation in operating reactors or reactors with design certifications. To initiate the development of quantitative metrics for ATR, a LWR Enhanced Accident Tolerant Fuels Metrics Development Workshop was held in October 2012 in Germantown, MD. This paper summarizes the outcome of that workshop and the current status of metrics development for LWR ATF.

  13. A Review of Criticality Accidents 2000 Revision

    Energy Technology Data Exchange (ETDEWEB)

    Thomas P. McLaughlin; Shean P. Monahan; Norman L. Pruvost; Vladimir V. Frolov; Boris G. Ryazanov; Victor I. Sviridov

    2000-05-01

    Criticality accidents and the characteristics of prompt power excursions are discussed. Sixty accidental power excursions are reviewed. Sufficient detail is provided to enable the reader to understand the physical situation, the chemistry and material flow, and when available the administrative setting leading up to the time of the accident. Information on the power history, energy release, consequences, and causes are also included when available. For those accidents that occurred in process plants, two new sections have been included in this revision. The first is an analysis and summary of the physical and neutronic features of the chain reacting systems. The second is a compilation of observations and lessons learned. Excursions associated with large power reactors are not included in this report.

  14. Assessment of CRBR core disruptive accident energetics

    Energy Technology Data Exchange (ETDEWEB)

    Theofanous, T.G.; Bell, C.R.

    1984-03-01

    The results of an independent assessment of core disruptive accident energetics for the Clinch River Breeder Reactor are presented in this document. This assessment was performed for the Nuclear Regulatory Commission under the direction of the CRBR Program Office within the Office of Nuclear Reactor Regulation. It considered in detail the accident behavior for three accident initiators that are representative of three different classes of events; unprotected loss of flow, unprotected reactivity insertion, and protected loss of heat sink. The primary system's energetics accommodation capability was realistically, yet conservatively, determined in terms of core events. This accommodation capability was found to be equivalent to an isentropic work potential for expansion to one atmosphere of 2550 MJ or a ramp rate of about 200 $/s applied to a classical two-phase disassembly.

  15. Cooperation of mobile robots for accident scene inspection

    Energy Technology Data Exchange (ETDEWEB)

    Byrne, R.H.; Harrington, J.

    1992-11-01

    A telerobotic system demonstration was developed for the Department of Energy`s Accident Response group to highlight the applications of telerobotic vehicles to accident site inspection. The proof-of- principle system employs two mobile robots, Dixie and RAYBOT, to inspect a simulated accident site. Both robots are controlled serially from a single driving station, allowing an operator to take advantage of having multiple robots at the scene. The telerobotic system is described and some of the advantages of having more than one robot present are discussed. Future plans for the system are also presented.

  16. Cooperation of mobile robots for accident scene inspection

    Energy Technology Data Exchange (ETDEWEB)

    Byrne, R.H.; Harrington, J.

    1992-01-01

    A telerobotic system demonstration was developed for the Department of Energy's Accident Response group to highlight the applications of telerobotic vehicles to accident site inspection. The proof-of- principle system employs two mobile robots, Dixie and RAYBOT, to inspect a simulated accident site. Both robots are controlled serially from a single driving station, allowing an operator to take advantage of having multiple robots at the scene. The telerobotic system is described and some of the advantages of having more than one robot present are discussed. Future plans for the system are also presented.

  17. [Drowning accidents in childhood].

    Science.gov (United States)

    Krandick, G; Mantel, K

    1990-09-30

    This is a report on five boys aged between 1 and 5 years who, after prolonged submersion in cold water, were treated at our department. On being taken out of the water, all the patients were clinically dead. After 1- to 3-hour successful cardiopulmonary resuscitation, with a rectal temperature of about 27 degrees C, they were rewarmed at a rate of 1 degree/hour. Two patients died within a few hours after the accident. One patient survived with an apallic syndrome, 2 children survived with no sequelae. In the event of a water-related accident associated with hypothermia, we consider suitable resuscitation to have preference over rewarming measures. The most important treatment guidelines and prognostic factors are discussed.

  18. Dementia and Traffic Accidents

    DEFF Research Database (Denmark)

    Petersen, Jindong Ding; Siersma, Volkert; Nielsen, Connie Thurøe;

    2016-01-01

    BACKGROUND: As a consequence of a rapid growth of an ageing population, more people with dementia are expected on the roads. Little is known about whether these people are at increased risk of road traffic-related accidents. OBJECTIVE: Our study aims to investigate the risk of road traffic......-related accidents for people aged 65 years or older with a diagnosis of dementia in Denmark. METHODS: We will conduct a nationwide population-based cohort study consisting of Danish people aged 65 or older living in Denmark as of January 1, 2008. The cohort is followed for 7 years (2008-2014). Individual's personal...... data are available in Danish registers and can be linked using a unique personal identification number. A person is identified with dementia if the person meets at least one of the following criteria: (1) a diagnosis of the disease in the Danish National Patient Register or in the Danish Psychiatric...

  19. A Study on the Operation Strategy for Combined Accident including TLOFW accident

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Bo Gyung; Kang, Gook Young [KAIST, Daejeon (Korea, Republic of); Yoon, Ho Joon [Khalifa University, Abu Dhabi (United Arab Emirates)

    2014-10-15

    It is difficult for operators to recognize the necessity of a feed-and-bleed (F-B) operation when the loss of coolant accident and failure of secondary side occur. An F-B operation directly cools down the reactor coolant system (RCS) using the primary cooling system when residual heat removal by the secondary cooling system is not available. The plant is not always necessary the F-B operation when the secondary side is failed. It is not necessary to initiate an F-B operation in the case of a medium or large break because these cases correspond to low RCS pressure sequences when the secondary side is failed. If the break size is too small to sufficiently decrease the RCS pressure, the F-B operation is necessary. Therefore, in the case of a combined accident including a secondary cooling system failure, the provision of clear information will play a critical role in the operators' decision to initiate an F-B operation. This study focuses on the how we establish the operation strategy for combined accident including the failure of secondary side in consideration of plant and operating conditions. Previous studies have usually focused on accidents involving a TLOFW accident. The plant conditions to make the operators confused seriously are usually the combined accident because the ORP only focuses on a single accident and FRP is less familiar with operators. The relationship between CET and PCT under various plant conditions is important to decide the limitation of initiating the F-B operation to prevent core damage.

  20. RENEB accident simulation exercise

    OpenAIRE

    Brzozowska, Beata; Ainsbury, Elizabeth; Baert, Annelot; Beaton-Green, Lindsay; Barrios, Leonardo; Barquinero, Joan Francesc; Bassinet, Celine; Beinke, Christina; Benedek, Anett; Beukes, Philip; Bortolin, Emanuela; Buraczewska, Iwona; Burbidge, Christopher; De Amicis, Andrea; De Angelis, Cinzia

    2017-01-01

    Purpose: The RENEB accident exercise was carried out in order to train the RENEB participants in coordinating and managing potentially large data sets that would be generated in case of a major radiological event. Materials and methods: Each participant was offered the possibility to activate the network by sending an alerting email about a simulated radiation emergency. The same participant had to collect, compile and report capacity, triage categorization and exposure scenario results ob...

  1. Analysis on critical factor of human error accidents in coal mine based on gray system theory%基于灰色系统理论的煤矿人因事故关键因素分析

    Institute of Scientific and Technical Information of China (English)

    兰建义; 乔美英; 周英

    2015-01-01

    Through analyzing the influence factors causing human error accidents in coal mine, the critical influ-ence factors were summarized.By applying the gray system correlation theory, according to the statistical data of mine accidents in recent 10 years from the State Administration of Coal Mine Safety, the influence types of human error accidents in coal mine were analyzed.Taking the number of accidents and death toll of accidents as reference index, the gray correlation degree about 10 kinds of factors mainly related to human error accident in coal mine, such as behavior error, personal violation, organization and management error and so on, were calculated and ana-lyzed.The gray correlation orders of these factors were derived, and the critical influence factors of human error ac-cident in coal mine were determined.Finally, the quantitative analysis result between the critical influence factors and human error accidents in coal mine were obtained.Using gray correlation theory to analyze the influence factors of human error in coal mine can well explain the weight relationship between human error and each critical affecting factor.It provides a strong reference for pretending and controlling the human error accident in coal mine, with more understanding on the main causing mechanism of human error accidents.%通过对煤矿人因失误事故致因因素进行分析,统计出相关的关键影响因素,运用灰色系统关联理论,根据国家安监局近十年煤矿事故统计数据,对煤矿人因失误事故影响类型进行了分析。以煤矿事故发生起数和事故死亡人数作为参考指标,计算和分析行为失误致因、个人违章、组织管理失误等十项主要与煤矿人因事故相关的灰色关联度,进而推算出这些因素的灰色关联序,确定出导致煤矿人因失误事故的关键因素,最终得到煤矿人因事故与关键影响因素之间的定量化分析结果。采用灰色关联理论对煤

  2. Noise technologies and systems for monitoring the beginning of the latent period of accidents on fixed platforms

    Science.gov (United States)

    Aliev, T. A.; Alizada, T. A.; Rzayeva, N. E.

    2017-03-01

    The authors analyse the causes of frequent failures of fixed oil platforms. It has been discovered that noise in the noisy signals received by the sensors of control systems in many cases contains valuable information about the beginning of a platform's transition into the latent period of an emergency state. Considering this specific characteristic, technologies for calculating estimates of the robust correlation functions have been developed. These technologies allow one to determine the noise characteristics and form correlation matrices equivalent to the matrices of the useful signals. Based on these technologies, the authors propose systems for monitoring the beginning of the latent period of the transition of fixed platforms into an emergency state.

  3. [The morphological status of the maxillodental system in children living in an area contaminated by radionuclides as a result of the accident at the Chernobyl Atomic Electric Power Station].

    Science.gov (United States)

    Sevbitov, A V; Persin, L S; Slabkobskaia, A B; Pankratova, N V

    1999-01-01

    The present study has been done in the framework of federal programme "Children of Chernobyl" with the aim to determine spread and structure of dental jaw abnormalities in children born and living in the radiation polluted regions after Chernobyl accident in 1986. 183 children have been examined in Donskoi town of Tula Province with the polluted soil by Cs-137 up to 5 Ci/km. All the examined children were divided into 2 groups: group 1--born in 1980-1986 and group 2--born in 1987-1994. It was determined that 76.5% of children have dental jaw system abnormalities. The most spread ones were occlusion abnormalities in combination with teeth abnormalities (28.9% cases) while the state of dental jaw system corresponding to the age standard was 2 times rarer in children born after the Chernobyl accident.

  4. The survey of occupational accidents in Yazd gas agency (2013

    Directory of Open Access Journals (Sweden)

    Amir Hossein Khoshakhlagh

    2016-10-01

    Full Text Available Background: Existence of coordinated and professional safety system to prevent occurrence of accidents and potential hazards seem to be essential in installing networks of gas distribution projects. Objective: To survey work-related accidents and safety performance indices in project implementation unit of Yazd gas agency. Methods: This analytical study was conducted on 197 of workforce in Yazd gas agency in 2013 that were selected by census and they were male. Demographic and accident information were gathered using a self-made questionnaire and face- to- face interview, and required information obtained from dossier to determine the safety performance indicators. Safety performance indicators were calculated in separately of 13 types occupations in project implementation unit of gas agency and data were analyzed using T-test. Findings: The highest accident frequency and severity rate were related to digging occupation and then metal line welding. Consequences of accidents were cuts (%56.7 and soreness (%14.9. The causes of accidents were related to uselessness of personal protective equipment (%25.2 and lack of precision in the task (%19.3. The highest rate of accident was observed among the age group 20-29 years with work experience of 4-6 years. Conclusion: According to the findings of this study and the risk of gas processes, it seems to be necessary the implementation of integrated management systems and training of workers about safety rules to improve the safety culture and prevent accidents.

  5. TRENDS IN SOCIAL SECURITY AGAINST ACCIDENTS AT WORK AND PROFESSIONAL DISEASES IN UKRAINE

    Directory of Open Access Journals (Sweden)

    O. Hamankova

    2014-03-01

    Full Text Available The article describes the main trends of formation and development of insurance against accidents. Defined position of the social insurance against accidents and professional diseases in the social protection system in Ukraine. Investigated the essence and content of social insurance against accidents.

  6. A Fault Alarm and Diagnosis Method Based on Sensitive Parameters and Support Vector Machine

    Science.gov (United States)

    Zhang, Jinjie; Yao, Ziyun; Lv, Zhiquan; Zhu, Qunxiong; Xu, Fengtian; Jiang, Zhinong

    2015-08-01

    Study on the extraction of fault feature and the diagnostic technique of reciprocating compressor is one of the hot research topics in the field of reciprocating machinery fault diagnosis at present. A large number of feature extraction and classification methods have been widely applied in the related research, but the practical fault alarm and the accuracy of diagnosis have not been effectively improved. Developing feature extraction and classification methods to meet the requirements of typical fault alarm and automatic diagnosis in practical engineering is urgent task. The typical mechanical faults of reciprocating compressor are presented in the paper, and the existing data of online monitoring system is used to extract fault feature parameters within 15 types in total; the inner sensitive connection between faults and the feature parameters has been made clear by using the distance evaluation technique, also sensitive characteristic parameters of different faults have been obtained. On this basis, a method based on fault feature parameters and support vector machine (SVM) is developed, which will be applied to practical fault diagnosis. A better ability of early fault warning has been proved by the experiment and the practical fault cases. Automatic classification by using the SVM to the data of fault alarm has obtained better diagnostic accuracy.

  7. The accident information and management system CAIRE for real time applications. Das Stoerfall-Leitsystem CAIRE fuer Echtzeitanwendungen

    Energy Technology Data Exchange (ETDEWEB)

    Brenk, H.D.; Kluttig, H.; Witt, H. de; Kistinger, S.; Kruschel, K.P.; Knaup, A.G.

    1992-01-01

    Remote monitoring systems have increased their importance as an inherent part of environmental surveillance installations in the FRG and in other countries. The existing systems in Germany are designed to cover both, routine operation and emergency situations. They provide site specific meteorological data, gross effluent dose rates, and dose rate measurements at on-site and approximately 30 off-site locations in the vicinity of a plant. Based on such telemetric surveillance networks an advanced automatic on-line system named CAIRE (Computer Aided Response to Emergencies) has been developed as a real time emergency response tool for nuclear facilities. This tool is designed to provide decision makers with most relevant radiation exposure data of the population at risk. CAIRE allows the continuous feed-back of current measurements of environmental impacts into diagnostic calculations for bringing measurements and calculations into best correspondence. This is the main advantage of CAIRE compared to conventional emergency systems and it results in both, a consistent actual interpretation of a bulk of single measurements of dose rates and/or activity concentrations, and a more realistic set of model parameters. Subsequently these parameters are used as input data for the evaluation of actual dose commitments and projections of them by means of real-time calculation. A second advantage is a more realistic assessment of the source term if in-plant dose rate measurements are not available due to emissions out of leckages, e.g. In such cases the assessment of the source term can be based an of-plant dose rate measurements located on the ground within a source distance between 200 and 300 m. (orig./HP).

  8. Accidents Preventive Practice for High-Rise Construction

    Directory of Open Access Journals (Sweden)

    Goh Kai Chen

    2016-01-01

    Full Text Available The demand of high-rise projects continues to grow due to the reducing of usable land area in Klang Valley, Malaysia. The rapidly development of high-rise projects has leaded to the rise of fatalities and accidents. An accident that happened in a construction site can cause serious physical injury. The accidents such as people falling from height and struck by falling object were the most frequent accidents happened in Malaysian construction industry. The continuous growth of high-rise buildings indicates that there is a need of an effective safety and health management. Hence, this research aims to identify the causes of accidents and the ways to prevent accidents that occur at high-rise building construction site. Qualitative method was employed in this research. Interview surveying with safety officers who are involved in highrise building project in Kuala Lumpur were conducted in this research. Accidents were caused by man-made factors, environment factors or machinery factors. The accidents prevention methods were provide sufficient Personal Protective Equipment (PPE, have a good housekeeping, execute safety inspection, provide safety training and execute accidents investigation. In the meanwhile, interviewees have suggested the new prevention methods that were develop a proper site layout planning and de-merit and merit system among sub-contractors, suppliers and even employees regarding safety at workplace matters. This research helps in explaining the causes of accidents and identifying area where prevention action should be implemented, so that workers and top management will increase awareness in preventing site accidents.

  9. Criticality accident in uranium fuel processing plant. Efficacy of insurance and third party inspection system. Capability margins of insurance, in view of bitter experience at JCO

    Energy Technology Data Exchange (ETDEWEB)

    Izumi, Taiichiro [Songaihokenryoritsusanteikai (Japan)

    2000-08-01

    Among persons relating to safety engineering, most of them point out merit and demerit of safety theory in Japan since a long term before. Under national policy aiming at growth and expansion due to a policy under leading of government after war, running for about 50 years remained some strains containing a number of contradictions and absurdities in various fields. Here was described mainly on how to be done safety accident protection and inspection on a base of happenings incidentally seen at a chance of the criticality accident. Therefore, here were also established some viewpoints such as transferable risk, limit from insurance feature, genealogy of insurance, under-writing, and risk management, to mention effectiveness of the third party inspection with closed relationship with accident insurance. (G.K.)

  10. False Alarm Probability Estimation for Compressive Sensing Radar

    NARCIS (Netherlands)

    Anitori, L.; Otten, M.P.G.; Hoogeboom, P.

    2011-01-01

    In this paper false alarm probability (FAP) estimation of a radar using Compressive Sensing (CS) in the frequency domain is investigated. Compressive Sensing is a recently proposed technique which allows reconstruction of sparse signal from sub-Nyquist rate measurements. The estimation of the FAP is

  11. MDCT findings in sports and recreational accidents

    Energy Technology Data Exchange (ETDEWEB)

    Bensch, Frank V; Koivikko, Mika P; Koskinen, Seppo K (Dept. of Radiology, Toeoeloe Hospital, Helsinki (Finland)), email: frank.bensch@hus.fi

    2011-12-15

    Background. Sports and recreational accidents involving critical areas of the body occur commonly in the general population. Reports on their demographics and recommendations for screening procedures are, however, few. Purpose. To assess injuries of the craniofacial area, spine, and torso resulting from sports and recreational accidents with multidetector computed tomography (MDCT) as primary imaging method in a Level I trauma center. Material and Methods. All emergency room CT requests over a time span of 105 months were reviewed retrospectively for trauma mechanism and injury. Patients were identified using an electronic picture archiving and communications system (PACS), and MDCT studies interpreted by two radiologists independently. Results. Of a total of 5898 patients, 492 patients (301 boys/men, 191 girls/women, age range 2-76 years, mean 33.5 years, median 29.5 years) with sports or recreational accidents emerged. A total of 102 traumatic findings were diagnosed, thereof 72 (71%) serious. The three most commonly encountered serious injuries were intracranial injury, fractures of facial bones, and vertebral injuries. The three most common injury mechanisms were bicycling, horseback riding, and team ball sports. Patients from recreational activities were on average significantly younger (29.2 years) than those from sports accidents (36.9 years; P < 0.001). Only age groups <21 years and 41-50 years differed in injury severity from the other age groups (P = 0.004 and P = 0.063, respectively). Of all trauma mechanisms, only bicycling had a significantly increased risk of injury (P < 0.001). Conclusion. Injuries in sports and recreational accidents presented with an overall incidence of 21%, of which 71% are serious. The most common mechanisms of injury were bicycling, horseback riding, and team ball sports. The largest incidence of serious injury involved bicycling. Because of the high probability of a serious injury and the high energies that are often involved

  12. [Chernobyl nuclear power plant accident and Tokaimura criticality accident].

    Science.gov (United States)

    Takada, Jun

    2012-03-01

    It is clear from inspection of historical incidents that the scale of disasters in a nuclear power plant accident is quite low level overwhelmingly compared with a nuclear explosion in nuclear war. Two cities of Hiroshima and Nagasaki were destroyed by nuclear blast with about 20 kt TNT equivalent and then approximately 100,000 people have died respectively. On the other hand, the number of acute death is 30 in the Chernobyl nuclear reactor accident. In this chapter, we review health hazards and doses in two historical nuclear incidents of Chernobyl and Tokaimura criticality accident and then understand the feature of the radiation accident in peaceful utilization of nuclear power.

  13. Establishment of the central radiation dose registration system for decontamination work involving radioactive fallout emitted by the Fukushima Daiichi APP accident.

    Science.gov (United States)

    Yasui, Shojiro

    2016-10-01

    With respect to radiation protection for decontamination efforts involving radioactive fallout emitted by the accident at the Fukushima Daiichi Atomic Power Plant, new regulations were established and obligated employers to monitor, record, and store of workers' dose records, and to check their past dose records at the time of employment. However, cumulative doses may not be properly maintained if a worker declares incorrect values for past doses. In response, with facilitation from the Ministry of Health, Labour and Welfare, primary contractors of decontamination works decided to establish a central dose registration system. There are four major issues in the design of the system to be resolved, included the following: primary contractors (a) do not have a legal responsibility to perform dose control for subcontractors, (b) do not have the right to control decontamination sites, (c) often organize joint ventures, and (d) correspond to a wide range of ambient dose rates. To resolve the issues, requirements of the system included the following: (a) centralize the operation of radiation passbooks, which records past doses and the results of medical examinations to each worker; (b) develop a database system that could register all dose data and accept inquiry from primary contractors; (c) establish a permanent data storage system for transferred records; and (d) provide graded type of services that are appropriate to the risk of radiation exposure. The system started its operation in December 2013 and provided dose distributions in April and July 2015. The average yearly dose in 2014 was 0.7 mSv, which increased by 0.2 mSv from 0.5 mSv in 2012 and 2013. However, no cumulative dose from 2012-2014 exceeded 20 mSv, which was far below than the dose limits (100 mSv/5 years and 50 mSv/year). Although current dose distributions of decontamination workers were within appropriate levels, careful monitoring of dose distribution is necessary for preserving the proper

  14. An Amusing Car Accident

    Institute of Scientific and Technical Information of China (English)

    倪俊

    2001-01-01

    @@ It was about midnight. My son was riding in the back seat with a friend of his in a car driven by a Chinese schoolmate, when a police car suddenly approached from behind with its siren sounding ominously. The driver immediately stopped his car by the roadside and stepped out to see what was happening. Just at that moment, he seemed to hear a policeman shouting to him: “Back your car!” (Actually, his order was: “Go back into your car!”) Then the student set about backing his car. In a flurry, he went so far as to bump into the police car, which made the cops very much alarmed.

  15. The SAM software system for modeling severe accidents at nuclear power plants equipped with VVER reactors on full-scale and analytic training simulators

    Science.gov (United States)

    Osadchaya, D. Yu.; Fuks, R. L.

    2014-04-01

    The architecture of the SAM software package intended for modeling beyond-design-basis accidents at nuclear power plants equipped with VVER reactors evolving into a severe stage with core melting and failure of the reactor pressure vessel is presented. By using the SAM software package it is possible to perform comprehensive modeling of the entire emergency process from the failure initiating event to the stage of severe accident involving meltdown of nuclear fuel, failure of the reactor pressure vessel, and escape of corium onto the concrete basement or into the corium catcher with retention of molten products in it.

  16. Severe accident approach - final report. Evaluation of design measures for severe accident prevention and consequence mitigation.

    Energy Technology Data Exchange (ETDEWEB)

    Tentner, A. M.; Parma, E.; Wei, T.; Wigeland, R.; Nuclear Engineering Division; SNL; INL

    2010-03-01

    An important goal of the US DOE reactor development program is to conceptualize advanced safety design features for a demonstration Sodium Fast Reactor (SFR). The treatment of severe accidents is one of the key safety issues in the design approach for advanced SFR systems. It is necessary to develop an in-depth understanding of the risk of severe accidents for the SFR so that appropriate risk management measures can be implemented early in the design process. This report presents the results of a review of the SFR features and phenomena that directly influence the sequence of events during a postulated severe accident. The report identifies the safety features used or proposed for various SFR designs in the US and worldwide for the prevention and/or mitigation of Core Disruptive Accidents (CDA). The report provides an overview of the current SFR safety approaches and the role of severe accidents. Mutual understanding of these design features and safety approaches is necessary for future collaborations between the US and its international partners as part of the GEN IV program. The report also reviews the basis for an integrated safety approach to severe accidents for the SFR that reflects the safety design knowledge gained in the US during the Advanced Liquid Metal Reactor (ALMR) and Integral Fast Reactor (IFR) programs. This approach relies on inherent reactor and plant safety performance characteristics to provide additional safety margins. The goal of this approach is to prevent development of severe accident conditions, even in the event of initiators with safety system failures previously recognized to lead directly to reactor damage.

  17. MELCOR simulation of postulated severe accidents in OPR1000

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Seongn Yeon; Kim Sung Joong [Hanyang Univ., Seoul (Korea, Republic of); Kim, Hwan Yeol; Park, Jong Hwa [KAERI, Daejeon (Korea, Republic of)

    2012-10-15

    Since the Fukushima accident in 2011, severe accidents of a nuclear power plant have been a target of big debate whether the defense in depth philosophy applied to current nuclear system is still vigorous enough to ensure the protection of the operators and the public. Thus an accurate prediction of severe accident has become a critical task for the nuclear engineers with reliable employment of Probabilistic Risk Analysis (PRA). According to a recent PRA result, Small Break Loss Of Coolant Accident (SBLOCA) without safety injection and Station Black Out (SBO) show high probability of proceeding to severe accidents. Thus, these accident scenarios need to be evaluated properly with reliable prediction tools. Song and Ahn analyzed SBO sequences in KSNP using MELCOR 1.8.5. Park and Song examined SBLOCA scenarios based on the PSA of KNSP using MAAP 4.06. Their studies utilized severe accident database. In continuation of the further analysis, several scenarios of postulated SBO and SBLOCA in OPR1000 are investigated using the severe accident database and MELCOR 1.8.6.

  18. Predicting Severity and Duration of Road Traffic Accident

    Directory of Open Access Journals (Sweden)

    Fang Zong

    2013-01-01

    Full Text Available This paper presents a model system to predict severity and duration of traffic accidents by employing Ordered Probit model and Hazard model, respectively. The models are estimated using traffic accident data collected in Jilin province, China, in 2010. With the developed models, three severity indicators, namely, number of fatalities, number of injuries, and property damage, as well as accident duration, are predicted, and the important influences of related variables are identified. The results indicate that the goodness-of-fit of Ordered Probit model is higher than that of SVC model in severity modeling. In addition, accident severity is proven to be an important determinant of duration; that is, more fatalities and injuries in the accident lead to longer duration. Study results can be applied to predictions of accident severity and duration, which are two essential steps in accident management process. By recognizing those key influences, this study also provides suggestive results for government to take effective measures to reduce accident impacts and improve traffic safety.

  19. Risk analysis of the liquid ammonia leakage accident in the DeNOx system of themal power plant%火电厂脱硝工程液氨泄漏事故风险分析

    Institute of Scientific and Technical Information of China (English)

    程民生

    2013-01-01

    结合火电厂脱硝工艺特点与液氨的毒理特性,分析了选择性催化还原烟气脱硝系统液氨的储存与使用可能潜在的生产安全事故风险;计算了设定液氨泄漏场景下的事故后果,用于液氨泄漏事故的预测、预警及应急救援.并结合电厂安全管理特点及存在的问题,从工艺系统监控、液氨储运、应急处置等方面,提出了必要的防范与应急措施建议.%According to the toxicological properties of liquid ammonia and the characteristics of the DeNOx process, the potential accident risk of liquid ammonia storage and use in the SCR flue gas DeNOx system are analyzed. The accident consequences of the set ammonia leakage scenario are calculated for the prediction, early warning and e-mergency rescue of the liquid ammonia leakage accident. Combined with the characteristics of power plant safety management and the existing problems, the necessary suggestion on prevention and emergency measures are put forward from the process system monitoring, liquid ammonia storage, emergency disposal and other aspects.

  20. Accidents with biological material in workers

    Directory of Open Access Journals (Sweden)

    Cleonice Andréa Alves Cavalcante

    2013-11-01

    Full Text Available The objective was to describe the accidents with biological material occurred among workers of Rio Grande do Norte, Brazil, between 2007 and 2009. Secondary data were collected in the National Notifiable Diseases Surveillance System by exporting data to Excel using Tabwin. Among the types of occupational accidents reported in the state, the biological accidents (no. = 1,170 accounted for 58.3% with a predominance of cases among nurses (48.6%. The percutaneous exposure was the most frequent occurrence and the circumstances of the accidents were related to the handling of sharps and the most common organic material was blood (63.5%. More than 50% of the workers were vaccinated against hepatitis B, but without information regarding the evaluation of vaccine response. The study revealed the need of improvement in the quality of the information, once the sub-entries and inconsistencies make the National Notifiable Diseases Surveillance System less trustworthy in the characterization of the affected workers.

  1. The use of safety management systems to avoid accidents at the work; El uso de sistemas de administracion de seguridad para evitar accidentes en el trabajo

    Energy Technology Data Exchange (ETDEWEB)

    Rios Garcia, Jose Manuel [Instituto de Investigaciones Electricas, Temixco, Morelos (Mexico)

    2000-07-01

    In accordance with a study of the International Organization of Work (OIT), to the year around 250 million labor accidents occur, most of them in non-developed or developing countries, and a smaller percentage occurs in the industrialized countries. Analyzing the reason for that difference, it is possible to say that it is mainly due to the fact that in developed countries a greater conscience for the safety has been taken, as much for the personnel as for the facilities within the company, and have developed what is known as the management of the safety systems (SAS), where the safety task no longer corresponds only to the safety department but to the entire personnel, from the direction to the last one of the workers. [Spanish] De acuerdo con un estudio de la Organizacion Internacional del Trabajo (OIT), al ano se producen alrededor de 250 millones de accidentes laborales. La mayoria de ellos se presentan en los paises no desarrollados o en vias de desarrollo, y un porcentaje menor se da en los paises industrializados. Analizando el porque de esa diferencia, se puede decir que se debe principalmente a que en los paises desarrollados se ha tomado una mayor conciencia por la seguridad, tanto del personal como de las instalaciones, dentro de las empresas y han desarrollado lo que se conoce como los sistemas de administracion de seguridad (SAS), en donde la tarea de seguridad ya no solo corresponde al departamento de seguridad si no a todo el personal, desde la direccion hasta el ultimo de los trabajadores.

  2. Sounding the Alarm: Health in the Anthropocene.

    Science.gov (United States)

    Butler, Colin D

    2016-06-30

    There is growing scientific and public recognition that human actions, directly and indirectly, have profoundly changed the Earth system, in a still accelerating process, increasingly called the "Anthropocene". Planetary transformation, including of the atmosphere, climate, ecosystems and biodiversity, has enormous implications for human health, many of which are deeply disturbing, especially in low-income settings. A few health consequences of the Anthropocene have been partially recognized, including within environmental epidemiology, but their long-term consequences remain poorly understood and greatly under-rated. For example Syria could be a "sentinel" population, giving a glimpse to a much wider dystopian future. Health-Earth is a research network, co-founded in 2014, which seeks, with other groups, to catalyse a powerful curative response by the wider health community. This paper builds on a symposium presented by Health-Earth members at the 2015 conference of the International Society for Environmental Epidemiology. It reviews and synthesizes parts of the large literature relevant to the interaction between the changing Earth system and human health. It concludes that this topic should be prominent within future environmental epidemiology and public health. Created by our species, these challenges may be soluble, but solutions require far more understanding and resources than are currently being made available.

  3. Sounding the Alarm: Health in the Anthropocene

    Directory of Open Access Journals (Sweden)

    Colin D. Butler

    2016-06-01

    Full Text Available There is growing scientific and public recognition that human actions, directly and indirectly, have profoundly changed the Earth system, in a still accelerating process, increasingly called the “Anthropocene”. Planetary transformation, including of the atmosphere, climate, ecosystems and biodiversity, has enormous implications for human health, many of which are deeply disturbing, especially in low-income settings. A few health consequences of the Anthropocene have been partially recognized, including within environmental epidemiology, but their long-term consequences remain poorly understood and greatly under-rated. For example Syria could be a “sentinel” population, giving a glimpse to a much wider dystopian future. Health-Earth is a research network, co-founded in 2014, which seeks, with other groups, to catalyse a powerful curative response by the wider health community. This paper builds on a symposium presented by Health-Earth members at the 2015 conference of the International Society for Environmental Epidemiology. It reviews and synthesizes parts of the large literature relevant to the interaction between the changing Earth system and human health. It concludes that this topic should be prominent within future environmental epidemiology and public health. Created by our species, these challenges may be soluble, but solutions require far more understanding and resources than are currently being made available.

  4. A radar unattended ground sensor with micro-Doppler capabilities for false alarm reduction

    Science.gov (United States)

    Tahmoush, Dave; Silvious, Jerry; Burke, Ed

    2010-10-01

    Unattended ground sensors (UGS) provide the capability to inexpensively secure remote borders and other areas of interest. However, the presence of normal animal activity can often trigger a false alarm. Accurately detecting humans and distinguishing them from natural fauna is an important issue in security applications to reduce false alarm rates and improve the probability of detection. In particular, it is important to detect and classify people who are moving in remote locations and transmit back detections and analysis over extended periods at a low cost and with minimal maintenance. We developed and demonstrate a compact radar technology that is scalable to a variety of ultra-lightweight and low-power platforms for wide area persistent surveillance as an unattended, unmanned, and man-portable ground sensor. The radar uses micro-Doppler processing to characterize the tracks of moving targets and to then eliminate unimportant detections due to animals as well as characterize the activity of human detections. False alarms from sensors are a major liability that hinders widespread use. Incorporating rudimentary intelligence into sensors can reduce false alarms but can also result in a reduced probability of detection. Allowing an initial classification that can be updated with new observations and tracked over time provides a more robust framework for false alarm reduction at the cost of additional sensor observations. This paper explores these tradeoffs with a small radar sensor for border security. Multiple measurements were done to try to characterize the micro-Doppler of human versus animal and vehicular motion across a range of activities. Measurements were taken at the multiple sites with realistic but low levels of clutter. Animals move with a quadrupedal motion, which can be distinguished from the bipedal human motion. The micro-Doppler of a vehicle with rotating parts is also shown, along with ground truth images. Comparisons show large variations for

  5. Development of Parameter Network for Accident Management Applications

    Energy Technology Data Exchange (ETDEWEB)

    Pak, Sukyoung; Ahemd, Rizwan; Heo, Gyunyoung [Kyung Hee Univ., Yongin (Korea, Republic of); Kim, Jung Taek; Park, Soo Yong; Ahn, Kwang Il [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2013-10-15

    When a severe accident happens, it is hard to obtain the necessary information to understand of internal status because of the failure or damage of instrumentation and control systems. We learned the lessons from Fukushima accident that internal instrumentation system should be secured and must have ability to react in serious conditions. While there might be a number of methods to reinforce the integrity of instrumentation systems, we focused on the use of redundant behavior of plant parameters without additional hardware installation. Specifically, the objective of this study is to estimate the replaced value which is able to identify internal status by using set of available signals when it is impossible to use instrumentation information in a severe accident, which is the continuation of the paper which was submitted at the last KNS meeting. The concept of the VPN was suggested to improve the quality of parameters particularly to be logged during severe accidents in NPPs using a software based approach, and quantize the importance of each parameter for further maintenance. In the future, we will continue to perform the same analysis to other accident scenarios and extend the spectrum of initial conditions so that we are able to get more sets of VPNs and ANN models to predict the behavior of accident scenarios. The suggested method has the uncertainty underlain in the analysis code for severe accidents. However, In case of failure to the safety critical instrumentation, the information from the VPN would be available to carry out safety management operation.

  6. ASSESSMENT OF RUNWAY ACCIDENT HAZARDS IN NIGERIA AVIATION SECTOR

    Directory of Open Access Journals (Sweden)

    Akinyemi Olasunkanmi Oriola

    2015-06-01

    Full Text Available Aviation crashes all over the world have recently been on the high rise, stemming from negligence, mechanical faults, weather, ground control errors, pilot errors, taxing and maintenance crew errors as probable reasons for such accidents. This study models the probabilistic risk assessment of runway accident hazards in Nigeria aviation sector. Six categories of runway accident hazards with their corresponding basic events were identified and modeled using fault tree analysis method of probabilistic risk assessment. The six categories of runway accident hazards are runway surface conditions, weather conditions, collision risk, aircraft system failure, approach/takeoff procedures and human factors. The Fault Tree developed is a system of OR-gates and the weights for each hazard were derived through a domain/expert opinion. The estimated probability of occurrence of runway accident which is the top event of the Fault Tree model is 0.2624. Fault Tree Analysis; thus, identifies the most likely root causes of runway accident through importance measures. The results of the analysis show close relationship of runway accidents in Nigeria aviation sector with aircraft system failure, approach/takeoff procedures, human factor, weather conditions and collision risk.

  7. Preliminary assessment of accident-tolerant fuels on LWR performance during normal operation and under DB and BDB accident conditions

    Science.gov (United States)

    Ott, L. J.; Robb, K. R.; Wang, D.

    2014-05-01

    Following the severe accidents at the Japanese Fukushima Daiichi Nuclear Power Station in 2011, the US Department of Energy initiated research and development on the enhancement of the accident tolerance of light water reactors by the development of fuels/cladding that, in comparison with the standard UO2/Zircaloy (Zr) system, can tolerate loss of active cooling in the core for a considerably longer time period while maintaining or improving the fuel performance during normal operations. Analyses are presented that illustrate the impact of these new candidate fuel/cladding materials on the fuel performance at normal operating conditions and on the reactor system under DB and BDB accident conditions.

  8. International law problems for realisation of the IAEA conventions on notification and assistance in the case of a nuclear accident

    Energy Technology Data Exchange (ETDEWEB)

    Petrov, M.M.

    1993-12-31

    The Chernobyl accident underscored the need for an early warning system and international assistance plan in case of a nuclear accident. Shortly after Chernobyl, two conventions were adopted under the auspices of the IAEA. The convention on Early Notification of a Nuclear Accident, in force since 1986, establishes an early warning system for all nuclear accidents whose effects might cross national boundaries. Under the convention on Assistance in the Case of a Nuclear accident or radiological Emergency,in force since 1987, countries must facilitate prompt assistance in case of a nuclear accident or radiological emergency, to minimize it`s consequences. Issues with the conventions are described.

  9. The dominance of accidents caused by banalities

    DEFF Research Database (Denmark)

    Jørgensen, Kirsten

    Most prevention analysis is focused on high risks, such as explosion, fire, lack of containment for chemicals, crashes in transportation systems, lack of oxygen, or chemical poisoning. In the industrial world, these kinds of risk still lead to incidents with huge consequences, albeit very seldom...... as an example of how much information such systems can offer in general for the work of accident prevention in more traditional and common enterprises....

  10. Emergency control system based on the analytical hierarchy process and coordinated development degree model for sudden water pollution accidents in the Middle Route of the South-to-North Water Transfer Project in China.

    Science.gov (United States)

    Long, Yan; Xu, Guobin; Ma, Chao; Chen, Liang

    2016-06-01

    Water transfer projects are important for realizing reasonable allocation of water resources, but once a water pollution accident occurs during such a project, the water environment is exposed to enormous risks. Therefore, it is critical to determine an appropriate emergency control system (ECS) for sudden water pollution accidents that occur in water transfer projects. In this study, the analytical hierarchy process (AHP) integrated with the coordinated development degree model (CDDM) was used to develop the ECS. This ECS was developed into two parts, including the emergency risk assessment and the emergency control. Feasible emergency control targets and control technology were also proposed for different sudden water pollution accidents. A demonstrative project was conducted in the Fangshui to Puyang channel, which is part of the Beijing-Shijiazhuang Emergency Water Supply Project (BSP) in the Middle Route of the South-to-North Water Transfer Project (MR-SNWTP) in China. However, we could not use an actual toxic soluble pollutant to validate our ECS, so we performed the experiment with sucrose to test the ECS based on its concentration variation. The relative error of peak sucrose concentration was less than 20 %.

  11. ECONOMIC COSTS ASSOCIATED WITH MOTORBIKE ACCIDENTS IN KATHMANDU, NEPAL

    Directory of Open Access Journals (Sweden)

    Diksha Sapkota

    2016-12-01

    Full Text Available Background: Road traffic accidents, considered as global tragedies, are in increasing trend however, the safety situation is very severe in developing countries incurring substantial amount of human, economic and social costs. Motorcycle crashes, the commonest form, occur mostly on economically active population. However, there is limited coverage of studies on economic burden of motorcycle crashes. This study aims to estimate the total cost and DALYs lost due to motorbike accidents among victims of Kathmandu Valley.Materials and Methods: Retrospective cross-sectional study was conducted among the patients having history of motorbike accidents within past twelve months and at least 3 months from the date of data collection. Interview was conducted using proforma among 100 victims of accidents and their care giver in case of death from November 15, 2014 to May 15, 2015. Cost estimation of motorbike accident was done based on human capital approach. Data collection tool was pretested and collected data were analyzed by SPSS and Microsoft excel. Results: Males (79% belonging to the economically productive age group shared the highest proportion among total accidents victims. Most common reason for accidents was reported to be poor road condition (41%. Indirect cost was found to be significantly higher than direct costs highlighting its negative impact on economy of family and nation due to productivity loss. Total Disability Adjusted Life Years (DALYs lost per person was found to be 490 years and national estimation showed large burden of motorbike accidents due to huge DALY loss.Conclusions: For low resource countries like Nepal, high economic costs of motorbike accidents can pose additional burden to the fragile health system. These accidents can be prevented, and their consequences can be alleviated. There is an urgent need for reinforcement of appropriate interventions and legislation to decrease the magnitude of it and its associated grave

  12. Severe Accident Test Station Activity Report

    Energy Technology Data Exchange (ETDEWEB)

    Pint, Bruce A [ORNL; Terrani, Kurt A [ORNL

    2015-06-01

    Enhancing safety margins in light water reactor (LWR) severe accidents is currently the focus of a number of international R&D programs. The current UO2/Zr-based alloy fuel system is particularly susceptible since the Zr-based cladding experiences rapid oxidation kinetics in steam at elevated temperatures. Therefore, alternative cladding materials that offer slower oxidation kinetics and a smaller enthalpy of oxidation can significantly reduce the rate of heat and hydrogen generation in the core during a coolant-limited severe accident. In the U.S. program, the high temperature steam oxidation performance of accident tolerant fuel (ATF) cladding solutions has been evaluated in the Severe Accident Test Station (SATS) at Oak Ridge National Laboratory (ORNL) since 2012. This report summarizes the capabilities of the SATS and provides an overview of the oxidation kinetics of several candidate cladding materials. A suggested baseline for evaluating ATF candidates is a two order of magnitude reduction in the steam oxidation resistance above 1000ºC compared to Zr-based alloys. The ATF candidates are categorized based on the protective external oxide or scale that forms during exposure to steam at high temperature: chromia, alumina, and silica. Comparisons are made to literature and SATS data for Zr-based alloys and other less-protective materials.

  13. [Current situation of accidents in the world].

    Science.gov (United States)

    Aguilar-Zinser, José Valente

    2010-01-01

    According to the World Health Organization (WHO), the number of traffic accidents is of concern. About 1.2 million people die every year on the roadways and about 20 to 50 million suffer from non-lethal trauma. Countries with low or medium incomes have higher rates of lethality by traffic accidents (21.5 and 19.5 per 100,000 habitants, respectively) than countries with higher incomes (10.3 per 100,000). It is estimated that the cost of traffic accidents in countries that are members of the Organization for Economic Cooperation and Development (OECD), escalate to rates that are between 2-5% of the gross domestic product (GDP). According to data from the health sector in Mexico, these rates are equivalent to 1.3 of GDR The WHO foresees that traffic accident traumas will rise to be the third cause of mortality in 2030. Because of the high complexity of the transport sector, it is necessary that the Transport and Communication Ministry works in a multidisciplinary and intersectorial fashion to ensure that the land transportation systems operate effectively in accordance with national economic development and the quality of life of the Mexican people.

  14. Traffic Accident Analysis Using Decision Trees and Neural Networks

    OpenAIRE

    Chong, Miao M.; Abraham, Ajith; Paprzycki, Marcin

    2004-01-01

    The costs of fatalities and injuries due to traffic accident have a great impact on society. This paper presents our research to model the severity of injury resulting from traffic accidents using artificial neural networks and decision trees. We have applied them to an actual data set obtained from the National Automotive Sampling System (NASS) General Estimates System (GES). Experiment results reveal that in all the cases the decision tree outperforms the neural network. Our research analys...

  15. Learning from incidents and accidents

    NARCIS (Netherlands)

    Drupsteen, L.; Kampen, J. van

    2014-01-01

    There are many different definitions for what constitutes an incident or an accident, however the focus is always on unintended and often unforeseen events that cause unintended consequences. This article is focused on the process of learning from incidents and accidents. The focus is on making sure

  16. [Practical management of CPB accident].

    Science.gov (United States)

    Depoix, J-P; Fenet, L; Provenchere, S

    2012-05-01

    Accident of CPB is a reality. It is important to be prepared for discussion with the family, with the hospital administration, eventually with the justice. But we have also to support perfusionnist and anesthetic team in charge of the patient during accident.

  17. Severe accident recriticality analyses (SARA)

    DEFF Research Database (Denmark)

    Frid, W.; Højerup, C.F.; Lindholm, I.

    2001-01-01

    Recriticality in a BWR during reflooding of an overheated partly degraded core, i.e. with relocated control rods, has been studied for a total loss of electric power accident scenario. In order to assess the impact of recriticality on reactor safety, including accident management strategies, the ...

  18. Impaired behavioural response to alarm substance in rainbow trout exposed to copper nanoparticles

    Energy Technology Data Exchange (ETDEWEB)

    Sovová, Tereza [Ecotoxicology Research and Innovation Centre, School of Biomedical and Biological Sciences, Plymouth University, Devon (United Kingdom); Department of Environmental Chemistry, Faculty of Environmental Technology, Institute of Chemical Technology, Prague (Czech Republic); Boyle, David, E-mail: david.boyle@ualberta.ca [Ecotoxicology Research and Innovation Centre, School of Biomedical and Biological Sciences, Plymouth University, Devon (United Kingdom); Sloman, Katherine A. [School of Science, University of the West of Scotland, Paisley (United Kingdom); Vanegas Pérez, Cecilia [Ecotoxicology Research and Innovation Centre, School of Biomedical and Biological Sciences, Plymouth University, Devon (United Kingdom); Laboratory of Animal Ecophysiology and Aquatic Ecotoxicology, National Autonomous University of Mexico, Mexico City (Mexico); Handy, Richard D. [Ecotoxicology Research and Innovation Centre, School of Biomedical and Biological Sciences, Plymouth University, Devon (United Kingdom)

    2014-07-01

    Highlights: • Copper nanoparticles impaired the behavioural response of trout to alarm substance. • This effect appeared to be greater than in trout exposed to copper sulphate. • Toxicity was mediated by interaction of materials at external surfaces of fish. • Copper nanoparticles did not affect the morphology of the olfactory rosette. • Copper nanoparticles caused a change in glutathione status in brains of fish. - Abstract: To date, studies of the toxicity of engineered nanoparticles (NPs) in fish have not fully considered effects on olfactory-mediated behaviours, despite their ecological importance. In this study the effects of copper NPs (Cu NPs) on the anti-predator behavioural responses of juvenile rainbow trout (Oncorhynchus mykiss) to trout alarm substance was investigated. Individual fish were exposed for 12 h to a control (no added Cu), 50 μg l⁻¹ of Cu as Cu NPs, or 50 μg l⁻¹ Cu as CuSO₄, after which fish behaviours were analyzed in 10 min periods before and after the addition of the alarm substance stimulus. The response of control fish to deionised water (negative control, no alarm substance stimulus) was also analyzed. The alarm substance elicited a behavioural response in the control fish characterized by an immediate freeze response and the slower resumption of swimming activity compared to negative controls exposed to the sham deionised water stimuli. In fish exposed to Cu NPs, the behavioural response to alarm substance was eliminated, with no significant difference in behaviours compared to negative controls. In comparison, exposure to 50 μg l⁻¹ Cu as CuSO₄ decreased, but did not eliminate the response of fish to alarm substance, which indicated a significantly greater effect of Cu NPs on olfactory mediated behaviours than of the equivalent concentration of Cu as CuSO₄. Measurement of total Cu concentrations in the tissues of fish demonstrated no significant accumulation of Cu from any treatment in gill, liver or brain

  19. Preliminary Calculation on a Spent Fuel Pool Accident using GOTHIC

    Energy Technology Data Exchange (ETDEWEB)

    Park, Jaehwan; Choi, Yu Jung; Hong, Tae Hyub; Kim, Hyeong-Taek [KHNP-CRI, Daejeon (Korea, Republic of)

    2015-10-15

    The probability of an accident happening at the spent fuel pool was believed to be quite low until the 2011 Fukushima accident occurred. Notably, large amount of spent fuel are normally stored in the spent fuel pool for a long time compared to the amount of fuel in the reactor core and the total heat released from the spent fuel is high enough to boil the water of the spent fuel pool when the cooling system does not operate. In addition, the enrichment and the burnup of the fuel have both increased in the past decade and heat generation from the spent fuel thereby has also increased. The failure of the cooling system at the spent fuel pool (hereafter, a loss-of-cooling accident) is one of the principal hypothetical causes of an accident that could occur at the spent fuel pool. In this paper, the preliminary calculation of a loss-of-cooling accident was performed. In this paper, the preliminary calculation of a loss-of cooling accident was performed with GOTHIC. The calculation results show boiling away of water in the spent fuel pool due to the loss-of-cooling accident and similar thermal performance of the spent fuel pool with previous research results.

  20. US Department of Energy Chernobyl accident bibliography

    Energy Technology Data Exchange (ETDEWEB)

    Kennedy, R A; Mahaffey, J A; Carr, F Jr

    1992-04-01

    This bibliography has been prepared by Pacific Northwest Laboratory (PNL) for the US Department of Energy (DOE) Office of Health and Environmental Research to provide bibliographic information in a usable format for research studies relating to the Chernobyl nuclear accident that occurred in the Ukrainian Republic, USSR in 1986. This report is a product of the Chernobyl Database Management project. The purpose of this project is to produce and maintain an information system that is the official United States repository for information related to the accident. Two related products prepared for this project are the Chernobyl Bibliographic Search System (ChernoLit{trademark}) and the Chernobyl Radiological Measurements Information System (ChernoDat). This report supersedes the original release of Chernobyl Bibliography (Carr and Mahaffey, 1989). The original report included about 2200 references. Over 4500 references and an index of authors and editors are included in this report.