Sample records for radioaktive abfaelle woher

  1. Radioactive wastes. From where, how much, to where?; Radioaktive Abfaelle. Woher, wieviel, wohin?

    Ammann, M


    This report helps to the popularization of the Nagra's works accomplished for the management and disposal of the radioactive wastes in Switzerland. The radioactive wastes are partitioned into 3 different types: high level waste (HLW), alpha-toxic waste (ATW) and low- and intermediate-level waste (L/ILW). Most of the radioactive wastes are produced in the nuclear power plants, but also by many applications in medicine, industry and research. They have to be correctly disposed of. Mankind and environment have to be protected against them in the long term. The type and quantity of the wastes are accurately known. At the nuclear power plants as well as in the central storage pool of the Zwilag AG and in the federal interim storage facility in Wuerenlingen, there is enough storage capacity for all radioactive wastes in Switzerland. Radioactive wastes can be safely disposed of in deep geological repositories for a time period long enough that the radioactivity is reduced to natural values. Nagra has proved the feasibility of such repositories and its results were accepted by the Federal Council.

  2. Refinancing of the search for a repository and of the repository for heat generating radioactive Waste. Pt. 2; Refinanzierung der Endlagersuche und des Endlagers fuer waermeentwickelnde radioaktive Abfaelle. T. 2

    Moench, Christoph [Sozietaet Gleiss Lutz, Berlin (Germany); Frankfurt Univ. (Germany)


    Part I of this article, which appeared in the preceding issue, described in general terms the background to the search for a disposal site and the result of the exploration to date of the repository, which would appear to be suitable from a mining standpoint according to the present knowledge. According to the rules in effect up to now, the exploration and construction would be financed by advance payments on the contributions of the waste producing companies, in particular the utility companies. The working draft of an 'Act on the search for and selection of a site for a repository for heat generating radioactive waste' (Gesetz zur Suche und Auswahl eines Standortes fuer ein Endlager fuer waermeentwickelnde radioaktive Abfaelle) from autumn 2012 provides for a new version of section 21b Atomic Energy Act, under which the costs for 'carrying out a repository selection procedure pursuant to the Repository Selection Act (Standort-auswahlgesetz)' would be allocated to the future users of the repository who are obliged to make contributions as a 'necessary expense'. Part II evaluates this provision of the working draft on the basis of the financial constitutional law. A comparison of sites is not a measure that could be allocated to the future users of the repository who are obliged to make contributions as a 'necessary expense'. Moreover, there is a lack of responsibility for the financing and of a legally relevant advantage that would be conferred by a cumulative alternative repository search for the later users of the repository who are obliged to provide the pre-financing. The costs can therefore not be allocated to the later users as either a contribution or a special charge, not even by way of an association with mandatory membership (Zwangsverband). They must be borne by the state. Consequently, the allocation stipulated by provision would constitute an impermissible charge under financial constitutional law. (orig.)

  3. Refinancing of the search for a repository and of the repository for heat generating radioactive waste. Pt. 1; Refinanzierung der Endlagersuche und des Endlagers fuer waermeentwickelnde radioaktive Abfaelle. T. 1

    Moench, Christoph [Sozietaet Gleiss Lutz, Berlin (Germany)


    The final disposal of radioactive waste is a state task that is assigned to the Federal Government pursuant to section 9a (3) sentence 1 of the Atomic Energy Act (AtG). Since the early 1970's, the Federal Government has been actively searching for and exploring final disposal sites for radioactive waste. In a proceeding accompanied by the intensive participation of technical experts and the public, the Gorleben salt dome (Salzstock) has emerged as a presumably suitable disposal site from a mining standpoint (eignungshoeffig) according to the current status of the exploration. The cost of these exploratory measures - and the subsequent construction - will be financed by the waste producers, in particular the utility companies, by means of advance payments on their contributions. Part I of this article will evaluate the selection and exploration of the Gorleben salt dome to date and examine the provisions on the pre-financing burden from the point of view of constitutional law. Constitutional objections can also be raised against the regulation in section 21b (4) AtG that was introduced in 1998, which excludes a refunding of the pre-financing contributions even if the repository is never erected or operated. Part II of this article, which will appear in the next issue, will take up the question of whether a search for an alternative repository site, as the Federal Ministry for the Environment (BMU) envisions in the working draft of an 'Act on the search for and selection of a site for a repository for heat generating radioactive waste' (Gesetz zur Suche und Auswahl eines Standortes fuer ein Endlager fuer waermeentwickelnde radioaktive Abfaelle), is likewise to be refinanced as a contribution by the parties obliged to make advance payments. (orig.)

  4. Research programme on radioactive wastes; Forschungsprogramm Radioaktive Abfaelle

    Eckhardt, A. [Eidgenoessische Kommission fuer die Sicherheit der Kernanlagen (KSA), Brugg (Switzerland); Hufschmid, P. [Kommission Nukleare Entsorgung (KNE), Bern (Switzerland); Jordi, S. [Swiss Federal Office of Energy, Berne (Switzerland); Schanne, M. [Institut fuer Angewandte Medienwissenschaft (IAM), Zuercher Hochschule, Winterthur (Switzerland); Vigfusson, J. [Hauptabteilung fuer die Sicherheit der Kernanlagen (HSK), Brugg (Switzerland)


    This report for the Swiss Federal Department of the Environment, Transport, Energy and Communication (DETEC) takes a look at work done within the framework of the research programme on radioactive wastes. The paper discusses the development of various projects and the associated organisations involved. Both long-term and short-term topics are examined. The long-term aspects of handling radioactive wastes include organisation and financing as well as the preservation of know-how and concepts for marking the repositories. Communication with the general public on the matter is looked at along with public perception, opinion-making and acceptance. Waste storage concepts are looked at in detail and aspects such as environmental protection, monitoring concepts, retrievability and encasement materials are discussed. Finally, ethical and legal aspects of radioactive waste repositories are examined. The paper is completed with appendixes dealing with planning, co-ordination and the responsibilities involved

  5. Conditioning and management of radioactive waste; Behandlung und Entsorgung radioaktiver Abfaelle

    Gliha, V. [Siemens AG, Bereich Energieerzeugung (KWU), Offenbach (Germany); Werschnik, W. [Siemens AG, Bereich Energieerzeugung (KWU), Offenbach (Germany)


    Pursuant to the directive issued by the German Federal Ministry for the Environment, waste conditioning for volume reduction must be carried out at the source, if possible. The article contains an outline of waste conditioning systems for liquid and solid radioactive wastes. Points described in greater detail are the criteria established by customers and projects, and the integration of systems in existing logistics and infrastructure facilities. Even for rather clearcut processes there is a trend to move away from isolated processes in favor of a complete waste management concept. In addition to specific procedures for radioactive waste conditioning, also a complete waste treatment building is described from the basic design concept to completion. Siemens has basic modules for such specific issues as licensing, fire protection, radiology, systems. This is the basis on which customized versions are planned and built in the light of special criteria required by a customer or a project. In addition to the growing importance of complete waste management concepts, also a positive cost-benefit assessment is a basic necessity. (orig.) [Deutsch] Die Abfallkonditionierung hat gemaess der BMU-Richtlinie unter dem Ziel der Volumenreduktion moeglichst am Entstehungsort zu erfolgen. Es werden realisierte Abfallbehandlungssysteme fuer fluessige und feste radioaktive Abfaelle dargestellt. Im besonderen werden dabei die projekt- und kundenspezifischen Vorgaben und die Einbindung von Systemen in die vorhandene Logistik und Infrastruktur beschrieben. Dabei zeigt sich auch bei ueberschaubaren Verfahren der Trend vom Einzelverfahren hin zu einem geschlossenen Entsorgungskonzept. Neben Einzelverfahren fuer die Behandlung von radioaktiven Abfaellen wird beispielhaft ein komplettes Abfallbehandlungsgebaeude von der Konzeption bis zur Realisation beschrieben. Bei Siemens liegen fuer Einzelfragen (z.B. Genehmigung, Brandschutz, Radiologie, Systeme) modulare Grundversionen vor. Auf dieser

  6. Optimized data flow for the waste form documentation of compactable radioactive wastes; Optimierter Datenfluss zur Erstellung von Abfallgebindedokumentationen fuer pressbare radioaktive Abfaelle

    Lange, M. [GNS Gesellschaft fuer Nuklear-Service mbH, Essen (Germany); Risch, R. [WTI Wissenschaftlich-Technische Ingenieurleistung GmbH, Juelich (Germany)


    According to the national radiation protection regulations (Strahlenschutzverordnung)it is necessary to perform a detailed documentation on radioactive materials, including the waste flow, transport and storage. The book-keeping system AVK is an authorized data base system. The authors describe the data relevant sheets, the activity calculation procedure based on local dose rate measurements and gamma spectroscopy and the necessary documents for the licensing procedure. For a structured and efficient waste form documentation a data base (PIKA-AS: project information and control system) was developed by GNS that includes all documentation relevant data from different measuring and calculation activities.

  7. Thermal processing of conditioned waste and fuel substitutes; Thermische Behandlung vorbehandelter Abfaelle und Ersatzbrennstoffe

    Velden, F. van der; Engweiler, J. [Von Roll Umwelttechnik AG, Zurich (Switzerland)


    Different technologies for the thermal processing of mechanical-biologically conditioned waste are described and compared in terms of cost and flexibility. (orig.) [Deutsch] Es werden verschiedene Technologien der thermischen Behandlung mechanisch-biologisch vorbehandelter Abfaelle vorgestellt und im Hinblick auf Kosten und Flexibilitaet verglichen. (orig.)

  8. Radioaktive Biomaterialien

    Assmann, Walter

    In der Strahlentherapie von Tumorgewebe (Radioonkologie) nutzt man die zellschädigende Wirkung verschiedener Strahlenarten zur gezielten Abtötung der Tumorzellen. Um bei der perkutanen Bestrahlung die Strahlenschäden im gesunden Gewebe in Grenzen zu halten, wird der Tumor aus verschiedenen Richtungen mit gut fokussiertem Strahl behandelt. Moderne Bestrahlungsanlagen sind durch Steuerung über leistungsfähige Rechner in der Lage, ein millimetergenaues Bestrahlungsprogramm abzufahren, das individuell auf den jeweiligen Tumor abgestimmt ist. Ein ganz anderer Weg, das umgebende gesunde Gewebe zu schonen, wird in der sog. Brachytherapie beschritten. Hier wird ein kurzreichweitiger, radioaktiver Strahler entweder direkt in das Tumorgewebe (interstitiell) oder in grosser Nähe (intrakavitär) permanent oder nur für eine bestimmte Zeitdauer eingebracht. Ein Beispiel ist die Behandlung des Prostatakarzinoms durch die Implantation von dünnwandigen metallischen Hülsen (seeds) von nur wenigen Millimetern Länge und knapp einem Millimeter Durchmesser, die minimalinvasiv mittels feiner Kanülen in die Prostata eingebracht werden. Sie enthalten ein künstliches Radionuklid mit typisch einigen Wochen Halbwertszeit, dessen therapeutisch wirksame Strahlungsdosis sich auf wenige Millimeter des umgebenden Gewebes beschränkt. Wesentlich für den Erfolg einer Strahlentherapie mit derartig kurzreichweitigen Strahlern ist eine Lagekontrolle mit entsprechend hoher räumlicher Auflösung.

  9. Developments and studies on the (T)HMC processes in a final repository for heat generating radioactive wastes. Synthesis and final report; Entwicklungen und Untersuchungen zu (T)HMC-Prozessen eines Endlagers fuer Waerme entwickelnde radioaktive Abfaelle. Synthese und Abschlussbericht

    Weyand, Torben [Bonn Univ. (Germany); Bracke, Guido; Fischer, Heidemarie; Frieling, Gerd; Hansmeier, Christina; Hotzel, Stephan; Kock, Ingo; Seher, Holger


    The report on developments and studies on the (T)HMC (thermal-hydraulic-mechanical-chemical) processes in a final repository for heat generating radioactive wastes covers the following topics: description of the projects, applied codes: TOUGH2, FLAC3D, TOUGH2 and FLAC3D, TOUHREACT/PetraSim, MARNIE, PHREEQC, geochemists workbench, SUSA; safety relevant singular processes in the transition phase, uncertainties due to process interactions, coupling of mass transport and geochemical equilibria, further developments and application of numerical simulations in the transition phase.

  10. Inventory evaluation and prognosis of NORM residues for the final disposal in a radioactive waste final repository. Final report; Bestandsaufnahme und Prognose von NORM-Rueckstaenden fuer die Endlagerung in einem Endlager fuer radioaktive Abfaelle. Abschlussbericht

    Ettenhuber, E.; Gellermann, R.; Kahnwald, S.; Kunze, C.; Weiss, D.; Schulz, H.


    The report on the evaluation and prognosis of NORM residues for the final disposal covers the following issues: scope of the project; practice of release of NORM residues for utilization and disposal and its impact on the mass balance of NORM wastes; compilation of the amount of NORM residues with improbable clearance from radiation protection monitoring; identification of so far existing storage sites and interim storage possibilities and their capacities; NORM residues that are not released from radiation surveillance and need presumably the delivering to a radioactive waste repository; estimation of cost and evaluation of economic aspects for the options interim storage and final disposal; options for the final disposal of NORM wastes.

  11. Expertise concerning the request by the ZWILAG Intermediate Storage Facility Wuerenlingen AG for granting of a licence for the building and operation of the Central Intermediate Storage Facility for radioactive wastes; Gutachten zum Gesuch der ZWILAG Zwischenlager Wuerenlingen AG um Erteilung der Bewilligung fuer Bau und Betrieb des Zentralen Zwischenlagers fuer radioaktive Abfaelle



    On July 15, 1993, the Intermediate Storage Facility Wuerenlingen AG (ZWILAG) submitted a request to the Swiss Federal Council for granting of a license for the construction and operation of a central intermediate storage facility for radioactive wastes. The project foresees intermediate storage halls as well as conditioning and incineration installations. The Federal Agency for the Safety of Nuclear Installations (HSK) has to examine the project from the point of view of nuclear safety. The present report presents the results of this examination. Different waste types have to be treated in ZWILAG: spent fuel assemblies from Swiss nuclear power plants (KKWs); vitrified, highly radioactive wastes from reprocessing; intermediate and low-level radioactive wastes from KKWs and from reprocessing; wastes from the dismantling of nuclear installations; wastes from medicine, industry and research. The wastes are partitioned into three categories: high-level (HAA) radioactive wastes containing, amongst others, {alpha}-active nuclides, intermediate-level (MAA) radioactive wastes and low-level (SAA) radioactive wastes. The projected installation consists of three repository halls for each waste category, a hot cell, a conditioning plant and an incineration and melting installation. The HAA repository can accept 200 transport and storage containers with vitrified high-level wastes or spent fuel assemblies. The expected radioactivity amounts to 10{sup 20} Bq, including 10{sup 18} Bq of {alpha}-active nuclides. The thermal power produced by decay is released to the environment by natural circulation of air. The ventilation system is designed for a maximum power of 5.8 MW. Severe conditions are imposed to the containers as far as tightness and shielding against radiation is concerned. In the repository for MAA wastes the maximum radioactivity is 10{sup 18} Bq with 10{sup 15} Bq of {alpha}-active nuclides. The maximum thermal power of 250 kW is removed by forced air cooling. Because of the high level of radiation the building for MAA wastes is equipped with thick walls with 140 cm of concrete which assures external shielding. In the hot cell, highly radioactive materials like spent fuel assemblies can be remotely manipulated, but normally highly-active wastes and spent fuel assemblies remain in their containers, which are not opened. The radioactivity in the repository for SAA wastes amounts to 10{sup 16} Bq with less than 10{sup 15} Bq of {alpha}-active nuclides. In the conditioning repository, SAA wastes are treated: some of the materials are decontaminated and disposed of as inactive material; the rest is encapsulated in barrels with cement. In the incineration and melting plant, the SAA wastes are burnt in a plasma oven at temperatures up to 20'000 K in order to reduce their volume. On the basis of its examination, HSK concluded that, from the point of view of the nuclear safety and radiation protection, no objections can be raised against the building license on condition that its requirements are taken into account. As far as the operational licence for conditioning, incineration and melting installations are concerned, many points cannot be satisfactorily cleared on the basis of the current safety report

  12. Cigeo. The French deep geological repository for radioactive waste. Excavation techniques and technologies tested in underground laboratory and forecasted for the future construction of the project; Cigeo. Das franzoesische Tiefenlager fuer radioaktive Abfaelle. Im Untertagelabor getestete und fuer den kuenftigen Bau des Projekts vorgesehene Vortriebstechniken und -technologien

    Chauvet, Francois [Agence Nationale pour la Gestion des Dechets Radioactifs (ANDRA), Chatenay-Malabry (France). Infrastructure Engineering Dept.; Bosgiraud, Jean-Michel [Agence Nationale pour la Gestion des Dechets Radioactifs (ANDRA), Chatenay-Malabry (France). Technological Development Program


    Cigeo is the French project for the repository of the high activity and intermediate long-lived radioactive waste. It will be situated at a depth of 500 m, In a clayish rock formation. An underground laboratory was built in the year 2000 and numerous tests are performed since 15 years, in order to know in detail the behavior of the rock and its ability to confine radioactive elements. In addition, this underground laboratory has brought and will continue to bring many lessons on the excavation methods to be chosen for the construction of Cigeo.

  13. Self-constructed detectors for environmental radiation sources. Instruments for detecting and measuring electric and magnetic fields as well as radioactive radiation; Selbstgebaute Detektoren fuer Strahlenquellen in der Umwelt. Pruef- und Messgeraete fuer elektrische und magnetische Felder sowie radioaktive Strahlung

    Lay, Peter


    The book presents experiments for detecting and measuring radiation sources. This includes detectors for electric and magnetic fields, radioactive radiation and even cosmic radiation, all of which can be detected by simple (electronic) circuits. Apart from the practical experiments, also basic physical knowledge is provided. The book comprises the following chapters: 1. Introduction; 2. Electrostatic fields in the environment; 3. Magnetostatic fields; 4. Electrodynamic fields; 5. Magnetodynamic fields; 6. Electromagnetic radiation in the environment; 7. Radioactive radiation in the environment; 8. Cosmic radiation; 9. PC interface; 10. Professional radiation measurement; 11. Risk potential. [German] In diesem Buch werden Experimente vorgestellt, mit denen man die verschiedenen Strahlenquellen nachweisen und messtechnisch erfassen kann. Darunter zaehlen Detektoren zum Nachweis elektrischer und magnetischer Felder, radioaktiver Strahlung und sogar von Strahlen aus dem Weltall. Mit einfachen (elektronischen) Schaltungen werden diese Gefahrenquellen aufgespuert. Neben vielen praxiserprobten Experimenten wird auch das physikalische Grundwissen vermittelt. Das Buch ist in folgende Kapitel aufgeteilt: 1. Einfuehrung; 2. Elektrostatische Felder in der Umwelt; 3. Magnetostatische Felder; 4. Elektrodynamische Felder; 5. Magentodynamische Felder; 6. Elektromagnetische Strahlen in der Umwelt; 7. Radioaktive Strahlen in der Umwelt; 8. Strahlen aus dem Weltall; 9. PC-Schnittstelle; 10. Professionelle Strahlenmessung; 11. Gefahrenpotenzial.

  14. Annual report 1993 by the Rossendorf Society of Nuclear Engineering and Analysis; Verein fuer Kernverfahrenstechnik und Analytik Rossendorf. Jahresbericht 1993

    Haefele, W. [ed.


    The second annual report contains, apart from the business report and the organigram, priorities and results achieved in the special fields of nuclear installations (decommissioning and disposal), nuclear waste management (radioactive wastes), nuclear analyses and rehabilitation, radiopharmaceuticals, and safety and radiation protection. (HP) [Deutsch] Der 2. Jahresbericht enthaelt neben dem kaufmaennischen Geschaeftsbericht und dem Organigramm die Schwerpunktaufgaben und erziehlten Ergebnisse der Fachbereiche Kernanlagen (Stillegung und Entsorgung), Nukleare Entsorgungswirtschaft (radioaktive Abfaelle), Nukleare Analytik und Sanierung, Radiopharmaka, und Sicherheit und Strahlenschutz. (HP)

  15. Expertise concerning the request by the ZWILAG Intermediate Storage Wuerenlingen AG for delivery of the operation licence for the conditioning installation as well as for the burning and melting installation of the central intermediate storage facility for radioactive wastes in Wuerenlingen; Gutachten zum Gesuch der ZWILAG Zwischenlager Wuerenlingen AG um Erteilung der Betriebsbewilligung fuer die Konditionierungsanlage sowie fuer die Verbrennungs- und Schmelzanlage des Zentralen Zwischenlagers fuer radioaktive Abfaelle in Wuerenlingen



    On December 15, 1997, the Central Intermediate Storage Facility for radioactive materials (ZWILAG) delivered a request to the Swiss Federal Council for an operational licence for the conditioning installation and the incineration and melting installation at the Central Intermediate Storage Facility (ZZL). For the whole project, the general licence was granted on June 23, 1993. The construction of the whole installation as well as the operation in the storage halls with reception, hot cell and transhipment station were licensed on August 12, 1999. The Federal Agency for the Safety of Nuclear Installations (HSK) examined the request documentation of ZWILAG from the point of view of nuclear safety and radiation protection. The results of the examination are contained in this report. In general, the examination leads to a positive decision. During the realisation process many project adaptations have brought improvements to the installation as far as radiation protection and the treatment of wastes are concerned. HSK requests from a former licensing process were taken into account by ZWILAG. The present examination contains many remarks and requests that the HSK considers necessary. The most important remarks are issued as special references as far as they do not appear as proposals in the licence obligations. In general, the reference form was chosen when the fulfilment of the request can be guarantied by HSK within the framework of a release process. Several references inform ZWILAG of problems for which HSK wishes to receive the results of extended inquiries or where HSK will assist in testing or demonstrations. Other references concern requests for plant documentation. Further, calculations of radioactive material release during normal operation is considered as being necessary. Based on its examination, HSK concludes that the conditions are fulfilled for the safe operation of the conditioning installation and of the incineration and melting installation as long as its remarks and references are taken into account

  16. The long path to a disposal for high radioactive waste. Pt. 2. A new approach for a better understanding of processes and the system in a whole; Auf dem langen Weg zu einem Endlager fuer hoch radioaktive Waerme entwickelnde Weg Abfaelle. T. 2. Ein neuer konzeptionell-konfigurativer Ansatz und ein neues Simulationswerkzeug zur Erarbeitung eines verbesserten Prozess- und Systemverstaendnisses fuer HAW-Entsorgungsanlagen - ohne und mit direktem laengerfristigem Monitoring

    Lux, Karl-Heinz; Wolters, Ralf; Zhao, Juan [Technische Univ. Clausthal, Clausthal-Zellerfeld (Germany). Inst. fuer Aufbereitung, Deponietechnik und Geomechanik


    A new conceptual-configurative approach and a new simulation tool for the development of an improved process and system understanding for HAW disposal systems - without and with direct long term monitoring are presented and discussed. With regard to the final repository development, a retrieveability of the heat generating high radio active waste during the storage phase and a general recoverability during the first 500 years after closure of the repository in the post closure phase are required. Both for the monitoring of the repository during the storage phase as well as thereafter, a direct monitoring of the storage horizon could be implemented as an alternative to an indirect monitoring.

  17. Optimised utilisation of existing incinerators by installation of upstream reactors for treatment of waste with high calorifica value - HYBRID waste treatment plants; Optimierte Nutzung bestehender Abfallverbrennungsanlagen durch Errichtung vorgeschalteter Reaktoren zur Behandlung heizwertreicher Abfaelle - HYBRID-Abfallbehandlungsanlagen

    El Labani, M.


    Abfallverbrennungsanlagen nachtraeglich um leistungsfaehige Rauchgasreinigungssysteme ergaenzt werden. Dies fuehrte zu einem erheblichen Anstieg der Kosten und Behandlungsgebuehren mit dem entsprechenden Druck zur optimierten Nutzung. Zusaetzliche Behandlungskapazitaeten werden benoetigt fuer heizwertreiche Abfaelle. Sie koennen zwar in konventionellen Abfallverbrennungsanlagen fuer Hausmuell behandelt werden, bedingen aber aufgrund des hoeheren Heizwertes eine Durchsatzreduzierung was die Kostensituation weiter negativ beeinflusst. Daher favorisieren aktuelle Konzepte die Behandlung heizwertreicher Abfaelle in spezifischen, dezentralen Anlagen. Die ueblicherweise kleinen Anlagen gehen einher mit hohen Nebenkosten der Errichtung. Zur Abschaetzung des Optimierungspotentials bestehender Abfallverbrennungsanlagen wurde deren Auslastungssituation untersucht. Bei umfangreichen Messkampagnen am MHKW Darmstadt konnte selbst bei 100%iger Auslastung der Verbrennungseinheit in der Rauchgasreinigungsanlage eine Luecke aufgezeigt werden, die durch eine entsprechend angepasste Vorschaltanlage aufgefuellt werden koennte. Eine solche Vorschaltanlage definiert zusammen mit der bestehenden Abfallverbrennungsanlage eine HYBRID-Abfallbehandlungsanlage. Die Bereitstellung eines Instrumentariums zur Unterstuetzung der Entscheidungsfindung bei der Konzeption solcher Anlagen ist Gegenstand dieser Arbeit. (orig.)

  18. Engineering geological and hydrogeological invstigations for storage of medium and low-activity nuclear waste at Cernavoda, Romania. Soil stabilisation using the CONSOLID system; Ingenieurgeologische und hydrogeologische Untersuchungen zur Lagerung mittel- und schwachradioaktiver Abfaelle in Cernavoda Rumaenien. Baugrundstabilisierung mit dem CONSOLID-System

    Giurgea, V.; Merkler, G.P.; Hoetzl, H.; Hannich, D. [Karlsruhe Univ. (T.H.) (Germany). Lehrstuhl fuer Angewandte Geologie


    In Cernavoda/Romania investigations and planning from a low and middle radioactive waste disposal site have been carried out. A multitude of hydrogeological, geological, engineering geological criteria`s and constructional security measures were examined with respect to the strict regulations for such a waste site. This studies and measures are shortly analyzed and discussed in this paper. In accordance with the selection criteria for such a hazardous waste site, several laboratory and `in situ` tests, soil-mechanic studies, numerical modeling and foundation tests for soil stabilization with the CONSOLID-System are presented. (orig.) [Deutsch] Zur Einhaltung der strengen Vorgaben, die bei einem Deponiestandort fuer mittel- und schwachradioaktive Abfaelle gestellt werden, sind in Cernavoda/Rumaenien eine Vielzahl von hydrogeologischen und ingenieurgeologischen Untersuchungen sowie bautechnischen Sicherungsmassnahmen vorgesehen, die im Rahmen dieser Publikation kurz analysiert und diskutiert werden. Im Zusammenhang mit den geologischen und hydrogeologischen Auswahlkriterien des Standortes werden eine Reihe von Labor- und `in situ` Untersuchungen, Modellrechnungen sowie Baugrundstabilisierungsmassnahmen mit dem CONSOLID-System vorgestellt. (orig.)

  19. Personal Digital Assistant (PDA: woher und wohin? / Personal Digital Assistant (PDA: development and prospect

    Dollfuß, Helmut


    Full Text Available This paper describes the development of modern PDAs and traces some historical roots because personal information management is an idea with a long tradition. It was put into practice early in human history based on different materials as data carrier. From wax plates and paper the idea was grafted onto microprocessor powered calculators. Further on the concept was transferred to coat-pocket sized handheld computers. These were called PDAs forming a device class on their own though functions of a PDA are ingreasingly integrated into other mobile devices. Finally the paper discusses the future of PDAs as spearhead of the mobile library. The PDA can be seen as a prophet in this movement followed by a range of new to-be mobile devices. Out of this we can expect to meet an even greater variety of operating systems, display sizes and communication channels in the future. PDA-projects are an ideal way to gain expert knowledge now for a mobile future in library information technology.

  20. Preparation of radiopharmaceutical formulations; Fremstilling av radioaktive farmasoeytiske blandinger

    Simon, J.; Garlich, J.R.; Frank, R.K.; McMillan, K


    Radiopharmaceutical formulations for complexes comprising at least one radionuclide complexed with a ligand, or its physiologically-acceptable salts thereof, especially {sup 153}samarium-ethylenediaminetetramethylenephosphonic acid, which optionally contains a divalent metal ion, e.g. calcium, and is frozen, thawed, and then administered by injection. Alternatively, the radiopharmaceutical formulations must contain the divalent metal and are frozen only if the time before administration is sufficiently long to cause concern for radiolysis of the ligand. 2 figs., 9 tabs.

  1. Radioactive sources astray; Radioaktive kilder på avveier



    In Norway, every year 2-3 incidents where radioactive sources are going astray happens. This can lead to serious consequences with the risk to both humans and the environment. Radioactive sources out of control are often ancient sources no longer in use and will be sent back to the dealer or an approved waste disposal facility.Radiation safety regulations has provisions for the acquisition, management and disposal of radioactive sources to assure proper use and handling of radioactive sources in the community. It is given here information about how businesses should deal with radioactive sources which have been taken out of use, and what should be done by discovery or suspected discovery of radioactivity in return metal industry.(eb)

  2. Radioactive implants for medical applications; Radioaktive Implantate fuer medizinische Anwendungen

    Schubert, M.


    The long-term success of surgery is often diminished by excessive wound healing, which makes another intervention necessary. Locally applied radionuclides with short range radiation can prevent such benign hyperproliferation. As pure electron emitter with a half-life of 14.3 days and a mean energy of 694.9 keV (E{sub max}=1710.48 keV) {sup 32}P is a suitable radionuclide which can be produced from the stable {sup 31}P by the capture of thermal neutrons (1 x 10{sup 14} /s/cm{sup 2}) in a nuclear reactor. After a typical irradiation time (14 days) the ratio of {sup 32}P to {sup 31}P is 1.4 x 10{sup -5} to 1. Implants made of polymer and/or bioabsorbable material functioning as a carrier of the radioactive emitter allow - as opposed to metallic implants - for new applications for this type of radiotherapy. In this thesis a manufacturing method for previously not available organic, radioactive implants has been developed and a corresponding dosimetry system has been established. By means of ion implantation, {sup 32}P ions with up to 180 keV can be shot some 100 nm deep into organic implant materials. For a typical dose (15 Gy over 7 days, 1 mm distance from the implant) an activity of 75 kBq is needed corresponding to 1.3 x 10{sup 11} {sup 32}P ions. The sputter ion gun, which has been optimized for this application, creates an ion beam with high beam current (> 14 {mu}A P{sup -}) and low emittance (< 4 {pi} mm mrad {radical}(MeV)). Because of the good beam quality also small implants (<1 mm{sup 2}) can be manufactured with high efficiency. The unintentionally co-implanted portion of molecules and nuclides of the same mass (e.g. {sup 31}PH, {sup 16}O{sub 2} and {sup 32}S) could be reduced from approximately 500 to 50 by an improvement of the isotope selection at {sup 32}P beam creation. Hence, in comparison with the best hitherto existing implantation methods, the radiation dose of the implant could be reduced by an order of magnitude. With regard to the beta dosimetry of 1-2 MeV electrons, the challenge arises from the short range (few millimeters only) in the tissue and the resulting steep dose decay. Therefore a Monte Carlo Simulation has been developed, based on the library GEANT4. In this dose planning system, apart form the possibility of schematic geometry, calculations based on patients computer tomography data have been made possible. For the validation of this simulation, a system for three-dimensional dosimetric measurements has been developed by means of a plastic scintillator in a water phantom. The simulations could be reproduced within a deviation of 10%. Furthermore, to establish a quality control for each implant produced, an electron counter system has been developed to measure activity. The calibration has been carried out by liquid scintillation counting. Additionally, Monte Carlo Simulations have been performed to allow for calibration of implant materials, which can hardly be diluted such as the used materials silicone or nickel titanium alloys. The measured changes of the material properties of silicone and the bioabsorbable polymer PLGA, which occur due to the production process, were reasonable, confirming the suitability as an implant material, in particular for the long-lasting fixation of the radionuclide. The implants have been tested in the context of two preclinical studies: (i) Otorhinolaryngology faces problems with congested paranasal sinuses, which entail infections. By the implantation of a radioactive silicone stent with an irradiation time of 7 days, it has been shown that an artificially created opening can be kept open on a long-term basis. (ii) In the field of ophthalmology the glaucoma is a wide-spread disease, which can cause blindness, resulting from an elevated intra-ocular pressure. However, it can be treated by a surgical intervention. For the first time, a bioabsorbable, radioactive implant has been used that is suitable to keep the artificially created drainage open, and hence, is able to lower the intra-ocular pressure on a long-term basis. As opposed to other appli

  3. Further development of the methodology for the realization of safety analyses concerning the controllability of operational malfunctions and accidents. Report on the working package 1. Review and development of safety-related assessment for final repositories for wastes with negligible heat generation and the provision of the necessary set of tools using the example of the final repository Konrad; Weiterentwicklung der Methodik fuer die Durchfuehrung von Sicherheitsanalysen zur Beherrschung von Betriebsstoerungen und Stoerfaellen. Bericht zum Arbeitspaket 1. Untersuchung und Entwicklung von sicherheitstechnischen Bewertungen fuer Endlager fuer Abfaelle mit vernachlaessigbarer Waermeentwicklung und Bereitstellung des notwendigen Instrumentariums am Beispiel des Endlagers Konrad

    Hartwig-Thurat, Eva; Uhlmann, Stephan


    In the research project on the ''Review and development of safety-related assessments of disposal facilities with negligible heat generation; development and provision of the necessary set of tools, using the example of the Konrad disposal facility'' (Untersuchung und Entwicklung von sicherheitstechnischen Bewertungen fuer Endlager fuer Abfaelle mit vernachlaessigbarer Waermeentwicklung; Entwicklung und Bereitstellung des notwendigen Instrumentariums am Beispiel des Endlagers Konrad - Forschungsvorhaben 3612R03410), the state of the art in science and technology of the safety-related assessments and sets of tools for building a safety case was examined. The reports pertaining to the two work packages described the further development of the methodology for accident analyses (WP 1) and of building a safety case (WP 2); also, comparisons were drawn on a national and international scale with the methods applied in the licensing procedure of the Konrad disposal facility. As part of the project, the report of Work Package 1 depicts the methodology of the operating safety analysis in order to control malfunctions and incidents (accident analysis) using the example of the Konrad mine accident analysis. Set of criteria in this connection is the state-of-the-art international and national comprehensive body of legislation identifying the incident requirements. In extracts complementary safety analysis procedures of other countries are presented where applicable. It becomes apparent, that the majority of the investigated countries use a deterministic accident analyses to identify incidents. Here, common international practice is to com-plement the deterministic accident analysis by a probabilistic analysis. This procedure acts on the IAEA (International Atomic Energy Agency) terms of reference using both deterministic and probabilistic methods for the determination of facility hazard potentials. Based on the Konrad mine method, aspects of incident

  4. Can transmutation replace deep radioactive repositories?; Ersetzt Transmutation die Tiefenlagerung radioaktiver Abfaelle?



    This illustrated brief report issued by the Swiss Federal Nuclear Safety Inspectorate (ENSI) takes a look at transmutation - a method to reduce the time taken for the radioactivity of radioactive wastes to decay. The aim of such a reduction is to reduce the amount of space needed for special underground repositories for highly radioactive wastes. Transmutation is briefly described. Nuclear fuel cycles with spent fuel separation and reprocessing is examined. The large-scale feasibility of such methods is looked at and the advantages offered in connection with the design and implementation of deep nuclear waste repositories are discussed.

  5. Can transmutation replace deep radioactive repositories?; Ersetzt Transmutation die Tiefenlagerung radioaktiver Abfaelle?



    This illustrated brief report issued by the Swiss Federal Nuclear Safety Inspectorate (ENSI) takes a look at transmutation - a method to reduce the time taken for the radioactivity of radioactive wastes to decay. The aim of such a reduction is to reduce the amount of space needed for special underground repositories for highly radioactive wastes. Transmutation is briefly described. Nuclear fuel cycles with spent fuel separation and reprocessing is examined. The large-scale feasibility of such methods is looked at and the advantages offered in connection with the design and implementation of deep nuclear waste repositories are discussed.

  6. Radioactive waste management in European countries; Entsorgung hoch radioaktiver Abfaelle in europaeischen Laendern

    Falck, W. Eberhard [Univ. de Versailles Saint-Quentin-en-Yvelines, Guyancourt CEDEX (France). Lab. REEDS; Riotte, Hans G. [OECD Nuclear Energy Agency (NEA), Issy-les-Moulineaux (France)


    This paper reviews the status of radioactive waste management programmes in some selected European countries, both in some that favour direct disposal like Sweden and Finland, and in some that reprocess spent nuclear fuel like France and the United Kingdom. This paper also discusses the approaches taken of some other countries such as the Netherlands, where implementation has been deferred. On the bottom line it can be concluded that disposal of low and intermediate level waste is implemented successfully, however, that the status of national programmes for high level waste or spent fuel differ considerably between the countries observed. The societal process for siting of such facilities proves to be particular sensitive and one may observe that siting procedures based on volunteerism and partnership with potential host communities are potentially most successful. (orig.)

  7. Radioactive contamination of edible mushrooms. Current measured values (State: 2014); Radioaktive Kontamination von Speisepilzen. Aktuelle Messwerte (Stand: 2014)

    Kabai, Eva; Hiersche, Lydia


    The report on the radioactive contamination of different wild edible mushrooms in southern Germany summarizes the actual situation in 2014 in comparison with the data since 2005. The mushrooms were fund in the regions contaminated as a consequence of the reactor accident in Chernobyl 1986. The data for Cs-137 and K-40 contamination of a large amount of wild edible mushrooms are tabulated for different sampling sites. Measured data of the years 2004 to 2013 are included.

  8. Radioactive contamination of edible mushrooms. Current measured values (State: 2013); Radioaktive Kontamination von Speisepilzen. Aktuelle Messwerte (Stand: 2013)

    Kabai, Eva; Hiersche, Lydia


    The report includes the current measured values (2013) of the radioactive contamination of edible mushrooms in Southern Germany (Cs137 and K-40) and discusses the relation radio-cesium intake and radiation exposure now and and the future.

  9. Natural radioactive materials. We need/we use them; Natuerliche radioaktive Stoffe. Wir (ge-)brauchen sie

    Klaus Flesch [Saechsisches Landesamt fuer Umwelt, Landwirtschaft und Geologie, Dresden (Germany). Strahlenschutz; Gellermann, Rainer [Nuclear Control and Consulting GmbH, Braunschweig (Germany); Heuel-Fabianek, Burkhard [Forschungszentrum Juelich (Germany); and others


    The articles in this edition present a small excerpt in the field of natural radioactive materials amongst others in the building industries, in the medical field or in scientific research. Due to the new radiation protection law, the natural occuring radioactive materials become more important to protect the general public.

  10. Traditional blood irradiation facilities based on radioactive sources are phased out; Tradisjonelle blodbestraalingsanlegg basert paa radioaktive kilder fases ut



    Blood irradiation facilities containing radioactive sources are among the most powerful sources of radiation. As government we want to phase out this type of facility for the benefit of virtually risk-free blood irradiation facility based on X-ray technology.(eb)

  11. Deposits of naturally occurring radioactivity in production of oil and natural gas; Radioaktive avleiringer i olje- og gassproduksjon

    Strand, T.; Lysebo, I.; Kristensen, D.; Birovljev, A.


    Deposits of naturally occurring radioactive materials is an increasing problem in Norwegian oil and gas production. Activity concentration in solid-state samples and production water, and doses to workers involved in different operations off-shore, have been measured. The report also includes a discussion of different methods of monitoring and alternatives for final disposal of wastes. 154 refs.

  12. Radioactive compounds in Norwegian nutrition after the Chernobyl accident; Radioaktive stoffer i norske matvarer etter Tsjernobyl ulykken



    The newsletter presents results from studies of various nutrients produced in Norway after the Chernobyl accident. The focus is on caesium in milk, cattle, sheep, goats, reindeer and fresh water fish. Some agricultural aspects are mentioned.

  13. Radioactive substances - fluxes, concentrations and possible effects in the Norwegian Sea.; Radioaktive stoffer: tilfoersler, konsentrasjoner og mulige effekter i Norskehavet.

    Liland, A.; Hosseini, A.; Iosjpe, M.; Nilsen, K.A.; Graefvert, T.; Skjerdal, H.


    Report for the comprehensive management plan for the Norwegian Sea. Different scenarios are modeled: an accident occurring while spent nuclear fuel is being transported, pollution from a submarine that sinks off the coast, discharges from Sellafield, and the consequences of discharges from the petroleum industry. Possible effects of ionising radiation to the marine environment, doses to marine organisms and contaminants in seafood, are considered. (Author)

  14. Treatment of nanomaterial-containing waste in thermal waste treatment facilities; Behandlung nanomaterialhaltiger Abfaelle in thermischen Abfallbehandlungsanlagen

    Vogel, Julia; Weiss, Volker [Umweltbundesamt, Dessau-Rosslau (Germany); Oischinger, Juergen; Meiller, Martin; Daschner, Robert [Fraunhofer Umsicht, Sulzbach-Rosenberg (Germany)


    There is already a multitude of products on the market, which contain synthetic nanomaterials (NM), and for the coming years an increase of such products can be expected. Consequently, it is predictable that more nanomaterial-containing waste will occur in the residual waste that is predominately disposed in thermal waste treatment plants. However, the knowledge about the behaviour and effects of nanomaterials from nanomaterial-containing waste in this disposal route is currently still low. A research project of the German Environment Agency on the ''Investigation of potential environmental impacts when disposing nanomaterial-containing waste in waste treatment plants'' will therefore dedicate itself to a detailed examination of emission pathways in the thermal waste treatment facilities. The tests carried out i.a. on an industrial waste incineration plant and a sludge incineration plant with controlled addition of titanium dioxide at the nanoscale, showed that no increase in the emissions of NM in the exhaust gas was detected. The majority of the NM was found in the combustion residues, particularly the slag.

  15. Qualification of polysiloxanes for long-term storage of radioactive waste; Qualifizierung von Polysiloxanen fuer die langzeitstabile Konditionierung radioaktiver Abfaelle

    Kucharczyk, P.


    At present German policy envisages interim storage of all radioactive waste (for approximately 30 years) until a final repository is available. This therefore leads to higher standards for storage containers. Silicone elastomers (polysiloxanes), materials on the basis of silicon and oxygen with organic substituents, have various physical and chemical properties and seem to be suitable for the long-term storage of low- and intermediate-level radioactive waste. The aim of the present work is the qualification of a new coating material for storage containers. The use of polysiloxanes in other applications was also investigated. An important criterion for the coating is the simplicity of its application. Moreover, it should also have a high adhesion on steel as well as providing protection against corrosion. These properties were investigated for different polysiloxanes. The spraying tests showed that polysiloxane material with a viscosity of up to 45 000 mPas could be applied by the airless spraying method. An elastic coating was produced which could ensure protection against mechanical impacts. In the framework of water vapour experiments, a very high diffusion constant was determined. The corrosion test confirmed that the polysiloxane coating provided only insufficient corrosion protection if the sample was in contact with water and water vapour at the same time. This problem was solved by using an additional priming coat of 60 {mu}m zinc paint. The adhesion test showed that polysiloxanes have different levels of adhesion. The best adhesion was determined for condensation-cured silicones. The addition-cured materials had a lower adhesion, which was improved by the application of a priming coat. The outcome of these investigations is a wide spectrum of applications for polysiloxanes which can be used as firmly adhering coatings or removable decontamination layers. (orig.)

  16. Ecological aspects to the use of pretreated waste in thermal plants; Oekologische Aspekte beim Einsatz aufbereiteter Abfaelle in thermischen Anlagen

    Friedel, M.; Urban, A.I. [Kassel Univ. (Gesamthochschule) (Germany). Fachgebiet Abfalltechnik


    The present contribution focuses on the input side of individual process techniques. It shows on the basis of example calculations how two parameters describing the incinerable (residual) waste that are of particular importance for unconventional thermal treatment methods, namely ``pollutant load`` and ``calorific value``, can be influenced by a recycling stage and then further by mechanical-biological pretreatment. [Deutsch] Im folgenden soll das Hauptaugenmerk auf die Inputseite zu den einzelnen thermischen Verfahren gelegt werden und anhand einer Beispielrechnung aufgezeigt werden, wie sich die fuer einen Einsatz in nichtkonventionellen thermischen Verfahren besonders wichtigen Parameter des aufbereiteten (Rest)Abfalls `Schadstoffbelastung` und `Heizwert` zunaechst durch eine Verwertung und weiter durch eine mechanisch-biologische Vorbehandlung veraendern. (orig./SR)

  17. Cyclic neutron activation for non-destructive characterization of radioactive waste; Zyklische Neutronen-Aktivierung zur Zerstoerungsfreien Charakterisierung radioaktiver Abfaelle

    Havenith, Andreas; Kettler, John [RWTH Aachen (Germany). Inst. fuer Nuklearen Brennstoffkreislauf; Mauerhofer, Eric [Forschungszentrum Juelich GmbH (Germany). Inst. fuer Energie und Klimaforschung


    In Germany about 100.000 casks with low-level radioactive waste are actually stored in federal collection sites or at the nuclear power plants. Due to the incomplete documentation these casks have to be characterized with respect to their composition. In order to avoid the opening of the casks a new non-destructive characterization method was developed by the authors based on the prompt and delayed gamma-neutron-activation analyses using 14 MeV neutrons. the main challenge was to determine the self-shielding of neutrons and photons dependent on the sample composition. Computerized MNCP calculations and experiments were performed. The multi-element analysis is based on the gamma spectroscopy during neutron activation. A new measuring system (MEDINA - multi-element detection based on instrumental neutron activation) was built esp. for the characterization of 200-l casks used in the repository KONRAD.

  18. Targeted improvement of radioactive waste management in Ukraine; Zielgerichtete Verbesserung des Managements radioaktiver Abfaelle in der Ukraine

    Jung, H.G.; Koever, M. [NUKEM Technologies GmbH, Alzenau (Germany)


    Fifteen nuclear generating units in Ukraine contribute more than 50 % to the country's electricity production. However, the management of radioactive waste arisings in all categories does not keep pace with this development. Both in nuclear power plants and in the interim and final storage required, waste management has not yet been developed far enough. At the present time, the radioactive waste arising in plant operation is conditioned either insufficiently or incompletely. It is stored on the sites of nuclear power plants. Adequate storage facilities are available only to a limited extent. An effective, comprehensive strategy of downstream management of that waste is missing. As a consequence, potential temporary shutdowns of reactors could jeopardize the power supply situation of the entire country. The situation is aggravated further by more radioactive waste coming from the Chernobyl nuclear power station and from other sources. The nuclear power plants currently in operation are by far the biggest waste producers today. To allow Ukraine to fall back on Western expert knowledge in managing its radioactive waste, NUKEM Technologies GmbH has been commissioned to support the competent Ukrainian institutions in building up a targeted, comprehensive and effective waste management structure. (orig.)

  19. Ultimate storage of radioactive waste - geotechnical challenge or routine task?; Endlagerung radioaktiver Abfaelle - Herausforderung oder Routine fuer die Geotechnik?

    Alheid, H.J. [Bundesanstalt fuer Geowissenschaften und Rohstoffe, Hannover (Germany)


    Construction, operation and decommissioning of nuclear waste repositories require sophisticated design, high-tech technical implementation and reliable performance assessment studies. Geotechnical methods have been applied in many research projects and tailored to the high standards of nuclear waste disposal. Exemplary the development of methods for the characterization of excavation damaged zones (EDZ) is discussed in this paper. Well known geotechnical and geophysical methods have been adapted to fulfil the requirements of essential high resolution in space and the necessity of long term observations. The achieved improvements in measurement techniques and data processing allow to describe the properties of the EDZ in detail. Scientist have accepted the challenge and fulfilled the special requirements of measuring, monitoring and modelling in the field of nuclear waste disposal. The newly developed methods should be checked for their applicability to other geotechnical problems in order to achieve more detailed results than with standard methods. (orig.)

  20. Beobachtungen von Kometen.

    Hopf, K.


    Checkliste für erfolgreiche Kometenbeobachtung. Kometen gezeichnet. Helligkeitsschätzungen an Kometen. Komet entdeckt - was tun? Die "Neun" hinter dem Komma - oder: Woher kommt der Komet? Kometenschweife. Literatur über Kometen.

  1. Astrophysik Spuren einer Sternenexplosion

    Knie, Klaus


    Münchner Physikern ist es gelungen, mit einem Tandembeschleuniger radioaktive 60Fe-Atome in einer Tiefseeprobe nachzuweisen. Wahrscheinlich wurde dieser radioaktive Stoff vor drei Millionen Jahren von einer etwa hundert Lichtjahre entfernten Supernova erzeugt, durch das Weltall geschleudert und schließlich auf der Erde abgelagert.

  2. Radioactive impurities in radiopharmaceuticals with Y-90. Consequences for waste disposal; Radioaktive Verunreinigungen in Radiopharmazeutika mit Y-90. Konsequenzen fuer die Entsorgung von Reststoffen

    Wanke, C.; Solle, A.; Geworski, L. [Medizinische Hochschule Hannover (Germany). Stabsstelle Strahlenschutz und Abt. Medizinische Physik


    Y-90 plays an important role in nuclear medicine and is of particular interest in radiation synovectomy (RSO) and in Selective internal radiation therapy (SIRT). Longer-lived impurities were investigated in a pharmaceutical used in RSO and in glass microspheres applied for SIRT. For this, measurements were carried out to identify gamma-emitting impurities. Especially in the late measurements, after decay of Y-90, impurities such as Y-88 and Y-91, Zn-65, Eu-152, Gd-153, Tb-160 und Yb-169 were identified, which accounted for less than 0,01 % of the total radioactivity at the calibration date, so that all pharmaceutical requirements were met. The impurities, however, have to be taken into account in waste management and clearance. Assuming typical masses, waste from RSO can undergo unrestricted clearance based on the clearance values tabulated in the German Radiation Protection Ordinance, provided sufficient decay storage. For waste from SIRT with glass microspheres, however, other clearance or disposal options have to be found.

  3. Problems with the assessment of internal radiation doses from radioactive tumortracers; Probleme bei der Bestimmung der durch radioaktive Tumormarker bedingten internen Strahlendosen

    Havlik, E. [Wien Univ. (Austria). Inst. fuer Biomedizinische Technik und Physik]|[Ludwig-Boltzmann-Institut fuer Nuklearmedizin, Vienna (Austria); Kurtaran, A.; Smith-Jones, P. [Vienna Univ. (Austria). Universitaetsklinik fuer Nuklearmedizin; Virgolini, I. [Ludwig-Boltzmann-Institut fuer Nuklearmedizin, Vienna (Austria)]|[Vienna Univ. (Austria). Universitaetsklinik fuer Nuklearmedizin


    In the field of nuclear medicine, various radioactive compounds are taken up by tumors and their metastases. Several computer programs (e.g. MIRDOSE, LUDEP) are available for the calculation of internal radiation doses. These programs require the determination of the time based activity distribution of the radiotracer in individual organs. The determination of organ doses can be problematic due to the interpretation of the measurement data, the biokinetics of the tracer and the morphology of the target organs. Calculations based on scintigraphic data can have high errors associated with the background subtraction method. Additionally, the determination of the residence times are important. They are derived from the time-activity courses. However, a problematic area is the accurate determination of the sizes of both the tumor and its metastases. These aspects will be discussed using actual examples based on such new tumor tracers as VIP and DOTA-lanreotide. (orig.) [Deutsch] In der Nuklearmedizin werden radioaktiv markierte, in Tumoren und Metastasen gespeicherte Substanzen eingesetzt. Voraussetzung fuer die Berechnung der internen Strahlendosen im Zielgewebe und in anderen Geweben bzw. Organen sind Daten ueber die Verteilung und ueber das zeitliche Verhalten der Tracer. Computerprogramme unterstuetzen diese Berechnungen (z.B. MIRDOSE, LUDEP). Bei der Bestimmung der Gewebedosen ergeben sich Probleme, die in der Interpretation der Messdaten, in er Biokinetik der Substanzen und in der Morphologie der Zielgewebe liegen. Bei der Auswertung von szintigraphischen Aufnahmen stellt die Hintergrundsubtraktion einen wesentlichen Unsicherheitsfaktor dar. Weiters werden die Strahlendosen in den Geweben von den mittleren Aufenthaltsdauern der radioaktiven Substanzen bestimmt, welche wiederum ueber Zeit-Aktivitaets-Verlaeufe bestimmt werden muessen, die in eine mathematische Form gezwaengt werden. Schliesslich ist die Bestimmung der Masse von Tumoren/Metastasen oft problematisch. Die angesprochenen Probleme werden an Hand von neuen Tumormarkern wie dem Vasoaktiven Intestinalpeptid (VIP) und DOTA-Lanreotide diskutiert. (orig.)

  4. Report on the long-term interim storage of spent fuels and vitrified wastes; Gutachten zur Langzeitzwischenlagerung abgebrannter Brennelemente und verglaster Abfaelle



    Long-term interim storage for several hundred years is an option on the management of high-level radioactive wastes. The decision on final disposal is postponed. Worldwide the long-term interim storage is not part of the disposal concept - a geologic final repository is the ultimate aim. Using today's technology the interim storage over several hundred years is supposed to be uncritical. Aging management is the most important challenge - the renewal of the facilities would have to be expected. Possible social change and their impact on the interim storage problem has not been considered.

  5. Argillaceous rock as host rock for final storage of radioactive waste in Germany; Tongesteine als Wirtsgesteine fuer die Endlagerung radioaktiver Abfaelle in Deutschland

    Braeuer, V.; Hoth, P. [Bundesanstalt fuer Geowissenschaften und Rohstoffe, Hannover (Germany)


    On behalf of the German Federal Ministry for Economics and Technology (BMWi), the Federal Institute for Geosciences and Raw Materials (BGR) in a study described argillaceous rock formations as potential host rock for repositories in some areas of Germany, and evaluated them. The study was based on available and usable data derived from maps, archives, and approx. 25,000 drillings. No additional field tests or laboratory examinations were conducted. The study was published in April 2007 under the title of 'Untersuchung und Bewertung von Tongesteinsformationen' ( The exclusion criteria and minimum requirements recommended by the Working Group on Repository Sites (AkEnd) in 2002 served as a basis for defining the subareas eligible for further study. In addition, internationally acknowledged selection criteria as well as weighting criteria to be taken into account especially under German conditions were applied. The result of the study is not a representation of repository sites. However, the investigations show that argillaceous rock meeting host rock requirements occurs in the Lower Cretacious as well as in rock formations of the Lower and Middle Jurassic of Northern Germany. In Southern Germany, rock of the Middle Jurassic was found to be worthy of examination. The clay formations of the Tertiary are not considered in the study because of their relatively adverse mechanical properties in Germany. The areas highlighted are situated mainly in Lower Saxony, Mecklenburg-Western Pomerania, Saxony-Anhalt, Baden-Wuerttemberg and, to a lesser extent, also im Bavaria, Brandenburg, and North Rhine-Westphalia. Other regional restrictions are mentioned in the study. Any further assessment of the argillaceous rock in the study would require an extensive program of investigations with a view to selecting sites for the final storage of high-level radioactive waste. (orig.)

  6. Substitution of wastes for fuels and raw materials in high-temperature processes; Substitution von Brennstoffen und Rohstoffen durch Abfaelle in Hochtemperaturprozessen

    Scholz, R. [Technische Univ. Clausthal, Clausthal-Zellerfeld (Germany). Inst. fuer Energieverfahrenstechnik; Beckmann, M. [Clausthaler Umwelttechnik-Institut GmbH (CUTEC), Clausthal-Zellerfeld (Germany)


    The physical recycling and energy conversion of wastes has for a long time been a topic of discussion. Some of the most interesting questions in this connection concern specific applications such as the co-combustion of sewage sludge in power plants, substitution of plastic wastes for primary fuels in burning processes in the cement industry etc. This paper also undertakes a comparative study of different applications, giving additional consideration to the state of the art in thermal waste treatment. Different processes can of course only be compared by taking the entirety of expenditures on additives and auxiliary energy into account and assuming equal side constraints for all processes. A further requirement is that the waste materials` specific properties that are relevant to the application in question have to be taken into account. This concerns in particular the effects of the substitution of waste-derived fuels (secondary fuels) for primary fuels on, for example, heat transfer conditions during the combustion process, flow conditions, and the resultant temperature distribution, transport of feedstock, and specific energy expenditure. Secondary fuels must be suited for substitution in various respects, e.g. in their material properties, and their combustion and thermal behaviour. The present paper deals in particular with the requirements on wastes as substitutes for primary fuels with regard to combustion and thermal behaviour. For this purpose it briefly discusses some important aspects of heat transfer in firing plants and industrial furnaces. An important criterion in assessing fuel substitution is the energy exchange ratio, which expresses value of the substitute fuel relative to that of the primary fuel and should be duly considered when making comparative studies. Focussing on aspects of process engineering the paper also deals exemplarily with the influence of fuel substitution on, e.g. furnace temperature, exhaust gas quantities etc. in clinker burning processes in the cement industry. To do justice to the steel and iron industry it also deals with fuel substitution in a natural gas fired cokeless cupola furnace. [Deutsch] Die energetische und die stoffliche Verwertung von Abfaellen ist ein bereits seit langem diskutiertes Thema. Dabei interessieren zunaechst die Fragestellungen im Zusammenhang mit dem jeweils spezifischen Einsatz wie z.B. bei der Co-Verbrennung von Klaerschlamm in Kraftwerksfeuerungen, der Substitution von Primaerbrennstoffen durch Kunststoffabfaelle beim Brennprozess in der Zementindustrie usw. Darueber hinaus wird weiter der Vergleich der jeweiligen Anwendung untereinander sowie die Gegenueberstellung mit den zum Stand der Technik gehoerenden thermischen Abfallbehandlungsverfahren diskutiert. Diese Verfahrensvergleiche muessen selbstverstaendlich unter Einbeziehung aller insgesamt erforderlichen Aufwendungen an Zusatzstoffen und Zusatzenergie mit gleichen Randbedingungen durchgefuehrt werden. Dabei sind u.a. die sich aus den spezifischen Eigenschaften der Abfallstoffe fuer den jeweiligen Anwendungsfall ergebenden Besonderheiten zu beruecksichtigen. Das betrifft insbesondere die Auswirkungen einer Substitution von Primaerbrennstoffen durch Ersatzbrennstoffe aus Abfaellen (Sekundaerbrennstoffe) z.B. bei einem Brennprozess auf die Waermeuebertragungsbedingungen, die Stroemungsverhaeltnisse und damit zusammenhaengend auf die Temperaturverteilungen, den Guttransport und den spezifischen Energieaufwand. Ersatzbrennstoffe muessen sich sowohl aus stofflicher Sicht als auch aus brennstoff- und waermetechnischer Sicht fuer eine Substitution eignen. In dem vorliegenden Beitrag wird insbesondere auf die Anforderungen an Abfaellen, die zur Substitution von Primaerbrennstoffen dienen aus brennstoff- und waermetechnischer Sicht eingegangen. Hierzu werden zunaechst kurz einige wesentliche Gesichtspunkte der Waermeuebertragung in Feuerungen und Industrieoefen eroertert. Wichtig fuer die Bewertung einer Brennstoffsubstitution ist das sogenannte Energieaustauschverhaeltnis. Dieses Verhaeltnis drueckt die Wertigkeit eines Ersatzbrennstoffes im Vergleich zu dem Primaerbrennstoff aus und muss bei einer vergleichenden Bilanzierung entsprechend beruecksichtigt werden. Weiter werden in dem Beitrag beispielhaft fuer den Klinkerbrennprozess in der Zementindustrie verschiedene Auswirkungen der Brennstoffsubstitution z.B. auf Ofentemperaturen, Abgasmengenstroeme usw. aus verfahrenstechnischer Sicht angesprochen. Aus dem Bereich der Stahl- und Eisenindustrie wird auf die Brennstoffsubstitution bei einem erdgasbefeuerten, kokslosen Kupolofen eingegangen. (orig.)

  7. Examination of fire hazards typically associated with the storage of high-calorific-value waste; Untersuchung abfalltypischer Brandgefahren bei der Lagerung heizwertreicher Abfaelle

    Rospunt, Joerg; Heuer, Susanne; Heinemeyer, Jesco; Buech, Lars-Heiner [Staatliches Gewerbeaufsichtsamt Hildesheim (Germany). Zentral Unterstuetzungsstelle Abfall, Gentechnik und Geraetesicherheit


    The past few years have repeatedly seen fires occurring around the country in connection with the temporary storage of untreated and sorted municipal waste, the cause of these fires suspected to be microbially initiated spontaneous combustion. Within the framework of a one-year measurement programme conducted at several deposition locations comprising a total high-calorific-value waste volume of around 5,000 m{sup 3}, the State Trading Standards Authority in Hildesheim, Lower Saxony/Central Support Agency for Waste Management, Genetic Engineering and Equipment Safety has been able to gain experience in the use of suitable measurement methods and the assessment of the fire risk posed by self-heating which can be applied to comparable waste storage sites. Temperature measurements using multi-point hay temperature probes made it possible to identify different phases in the temperature behaviour. Detailed analyses were conducted to examine the dependence of the measurement data on the measuring point depth in the waste heap body and the significance of the measuring point distribution for determining small-scale temperature variations. The findings indicate that spontaneous heating in the warm-up phase after the relocation or deposition of heaps of high-calorific-value waste may generate worrying temperatures that call for the consideration of further monitoring measures with a view to assessing the fire hazard posed by such waste storage sites. (orig.)

  8. Time for action. Disposal of radioactive wastes is a task regarding all of us; Zeit zum Handeln. Die Entsorgung radioaktiver Abfaelle geht uns alle an



    This report helps to the popularization of the Nagra works accomplished for the management and disposal of the radioactive wastes in Switzerland. In Switzerland the disposal of radioactive wastes is clearly regulated. The disposal programme describes the process according to which the long-term storage of radioactive wastes has to be implemented to guaranty safety for mankind and environment. The disposal of radioactive wastes in deep geological repositories is a task of national importance. Until a deep repository can get into operation, several licence stages are necessary. After the overall licence given by the Federal Council is accepted by the parliament, it may still be the subject of an optional referendum. There are three different types of radioactive wastes: the low- and intermediate-level wastes (L/ILW) and the high-level wastes (HLW). Two different deep geological repositories are needed, one for the L/ILW wastes and another one for the HLW wastes. Before the repositories begin operation, the wastes are stored on the ground in interim storage facilities. The general licence for the construction of the repositories is expected to be granted before 2020. Afterwards the construction of both repositories can be undertaken. The repository for L/ILW wastes will not start operation before 2030. The start of operation of the repository for HLW wastes is not expected before 2040. This repository will be designed in such a way that the spent fuel assemblies which are stored as HLW wastes, could be withdrawn even after the closure of the repository.

  9. Bremsstrahlung information for the non-destructive characterization of radioactive waste packages. Final report; Nutzung von Bremsstrahlungsinformationen fuer die zerstoerungsfreie Charakterisierung radioaktiver Abfaelle. Abschlussbericht

    Buecherl, T.; Rohrmoser, B.; Lierse von Gostomski, C.


    The report describes a feasibility study on non-destructive characterization of radioactive waste package using bremsstrahlung information within the gamma spectra. A multi-step was developed for the identification of the bremsstrahlung in the measured gamma spectra under defined boundary conditions. The experimental investigations were performed using a stationary HPGe detector system, a mobile HPGe detector system and a mobile gamma scanner. Further studies are necessary with respect to the possible beta emitting radionuclides in a radioactive waste package.

  10. The Baumgarte concept for wastes. Grate and boiler designed as a unit; Das Baumgarte Konzept fuer Abfaelle. Rost und Kessel als Einheit

    Eckardt, Joerg; Gruener, Gerald [Baumgarte Boiler Systems GmbH, Bielefeld (Germany)


    Waste incineration plants essentially consist of a thermal, i.e. combustion, component and a power production component. Baumgarte Boiler Systems GmbH is a boiler manufacturer with a tradition of almost 75 years, and the present contribution therefore naturally focuses on the thermal component. In the course of designing more than 100 waste incineration boilers the company has evolved an overall concept for the basic equipment of an incineration plant including a combustion grate and a flue gas purification system as integral parts. The concept is based on a feed grate and a steam generator of preferably horizontal design. One very good example of the innovativeness and durability of Baumgarte boiler systems is the waste incineration plant of Frankfurt/Main with steam parameters of 6.0 MPa and 500 C and 62.8 t/h of steam output. The present contribution describes the essential features and advantages of the Baumgarte concept.

  11. Ethical aspects of radioactive waste disposal. Waste producer, responsible party, persons concerned; Ethische Aspekte der Entsorgung radioaktiver Abfaelle. Verursacher, Verantwortliche, Betroffene

    Kamp, Georg [EA / European Academy GmbH, Bad Neuenahr-Ahrweiler (Germany)


    In the frame of the Gorleben memorandum the discussion on ethical aspects in connection with radioactive waste disposal has evolved. The controlled disposal includes the so called ''polluter pays principle''. Problems arise with the search for a final repository site with respect to future generations, the interests of Inhabitants and neighboring countries. A delayed decision might avoid overhasty compromises that could reduce adequate safety measures for future generations. The best possible precautions for safety and accident prevention are required.

  12. Material stream management of biomass wastes for the optimization of organic wastes utilization; Stoffstrommanagement von Biomasseabfaellen mit dem Ziel der Optimierung der Verwertung organischer Abfaelle

    Knappe, Florian; Boess, Andreas; Fehrenbach, Horst; Giegrich, Juergen; Vogt, Regine [ifeu-Institut fuer Energie- und Umweltforschung GmbH, Heidelberg (Germany); Dehoust, Guenter; Schueler, Doris; Wiegmann, Kirsten; Fritsche, Uwe [Oeko-Institut, Inst. fuer Angewandte Oekologie, Darmstadt (Germany)


    The effective use of the valuable substances found in waste materials can make an important contribution to climate protection and the conservation of fossil and mineral resources. In order to harness the potential contribution of biomass waste streams, it is necessary to consider the potential of the waste in connection with that of the total biomass. In this project, relevant biogenous material streams in the forestry, the agriculture as well as in several industries are studied, and their optimization potentials are illustrated. Scenarios are then developed, while taking various other environmental impacts into considerations, to explore possible optimized utilization of biomass streams and biomass waste substances for the future. Straw that is not needed for humus production and currently left on the field can be used for its energy content. The realisation of this potential would be significant contribution towards climate protection. The energetic use of liquid manure without negatively influencing its application as commercial fertilizer can also be similarly successful because of its large volume. The results of our study also support an increased energetic use of saw residues as fuel (in form of pellets) in small furnaces. For household organic wastes, the report suggests the fermentation with optimized energy use and intensified marketing of the aerobically treated compost as peat substitution. While for waste cooking fat that is currently disposed in the residual waste, a separate collection and direct use in motors that are used as combined heat and power generation are recommended. For meat and bone meal and communal sludge that are not being used substantial currently or in the future, phosphorus can be recovered with promising success from the ash produced when the waste is burnt in mono incinerators. These technical options should however be tested against disposal standard. (orig.)

  13. Monitoring a repository for high-level radioactive waste in Germany. Possibilities and limits; Ueberwachung eines Endlagers fuer hochradioaktive Abfaelle in Deutschland. Moeglichkeiten und Grenzen

    Jobmann, M.; Haverkamp, B. [DBE Technology GmbH, Peine (Germany); Eilers, G. [Bundesamt fuer Strahlenschutz, Salzgitter (Germany)


    Pursuant to the new BMU safety requirements of September 2010 imposed upon the final storage of radioactive waste generating heat, the operator of a repository in Germany must establish a monitoring program which furnishes relevant measured information during the operations phase and for a defined period of time after closure of the repository. Within the framework of a feasibility study, an assessment basis was established to show in what format information about the status of a closed repository mine could be obtained technically without impairing the safety of barriers, for instance, by cable ducts. As a conceptual design basis, processes and measured quantities relevant to monitoring were attributed to the components of the current safety demonstration concept. For one model variant, monitoring possibilities of these processes were shown on the basis of monitoring modules. Some first experiments are being carried out in European underground laboratories about the use of wireless transmission systems in the repository area. On the basis of those activities, experiments could also be designed in the German exploratory mine of Gorleben in order to examine to what extent information obtained by monitoring could be transmitted in a wireless mode in rock salt formations. As far as the autonomous supply of electricity to measurement systems is concerned, which must be guaranteed on a long-term basis, there is now a possibility of using thermoelectric isotope generators or betavoltaic batteries. (orig.)

  14. Prompt-gamma neutron activation analysis for the non-destructive characterization of radioactive wastes; Prompt-Gamma-Neutronen-Aktivierungs-Analyse zur zerstoerungsfreien Charakterisierung radioaktiver Abfaelle

    Kettler, John Paul Hermann


    In Germany, stringent official regulations govern the handling and final storage of radioactive waste. For this reason, the Federal Government has opted for final storage of radioactive waste with negligible heat generation in deep geological formations. At present the Konrad mine in Salzgitter will be rebuilt as a final disposal, the start of operation is scheduled for 2014. Radioactive waste with negligible heat generation originates from the operation and decommissioning of nuclear power plants, the medical sector or from research establishments. The requirements of the planning approval decision to build up the disposal Konrad, published on the 22{sup nd} of May 2002, obligate the waste producer to consider the limits for chemotoxic substances and to document the waste content. Before the radioactive waste can be stored in the final disposal, it is necessary to characterize the waste composition, relating to the concentration of water polluting substances. In particular for the wastes produced in the year before 1990, the so-called old wastes, there is a lack of documentation. The chemotoxicity of old wastes can mostly only characterized by time consuming and destructive methods. Furthermore these methods produce high costs, which depend on the arrangements to avoid contamination, to comply with the radiation protection and for the conditioning of the wastes. A prototype system, based on the Prompt-Gamma-Neutron-Activation-Analysis (PGNAA) with 14 MeV neutrons, has been developed in this work. This system allows the characterization of large samples, like 25 and 50 l drums. The signature of the element composition is in this processed by gamma-ray spectroscopy. This work was focused, in addition to the feasibility of the system, to the neutron and photon transport in large samples. Therefore the neutron and photon self-absorption in dependence of the sample composition were the main part of interest. Computer simulations (MCNP) and experiments were performed to understand this correlation. Several homogeneous and inhomogeneous sample drums were produced for the qualification of the prototype system. The sample drums were characterized with different systems and methods to verify the results of the PGNAA-Prototype-System. At the end of the present work, the detection limits of selected elements for different irradiation and measurement conditions were determined. The element compilation refers to relevant elements for the final disposal Konrad. The results of the measurements, which were realized with the PGNAA-Prototype-System, show, that a non-destructive characterization of large samples is possible. Furthermore a routine test procedure, based on the results of the present work, is in development to characterize 200 l drums. (orig.)

  15. Onderzoek naar de toepasbaarheid en bruikbaarheid van de scintillatievloeistoffen minisolve en safe fluor, ten behoeve van B-radioaktiviteitsmetingen

    Bruchem, van G.D.; Schilt, R.


    Het rapport geeft een overzicht van de testresultaten van het onderzoek naar toepasbaarheid en bruikbaarheid van twee scintillatievloeistoffen (commercieel verkrijgbaar), Minisolve en Safe Fluor. Van deze twee scintillatievloeistoffen wordt Minisolve al 3 jaar op het RIKILT toegeast bij B - radioakt

  16. Handling of natural occurring radioactive deposits in the oil and gas industry in Norway, United Kingdom and the Netherlands; Haandtering av radioaktive avleiringer i olje- og gassproduksjon i Norge, Storbritania og Nederland

    Lysebo, I.; Tufto, P


    Deposits containing naturally occurring radioactive materials is an increasing problem in oil and gas production. Laws and regulations in thisarea is under preparation, and it is a wish for harmonization with the other oil and gas producing countries in the North Sea. The report gives an overview of amounts of waste and activity levels, decontamination methods and waste handling in Norway, Great Britain and the Netherlands.

  17. Investigation of the behaviour of impact limiting devices of transport casks for radioactive materials in the package approval and risk analysis; Untersuchung des Verhaltens stossdaempfender Bauteile von Transportbehaeltern fuer radioaktive Stoffe in Bauartpruefung und Risikoanalyse

    Neumann, Martin


    Transport casks for radioactive materials with a Type-B package certificate have to ensure that even under severe accident scenarios the radioactive content remains safely enclosed, in an undercritical arrangement and that ionising radiation is sufficiently shielded. The impact limiter absorbs in an accident scenario the major part of the impact energy and reduces the maximum force applied on the cask body. Therefore the simulation of the behaviour of impact limiting devices of transport casks for nuclear material is of great interest for the design assessment in the package approval as well as for risk analysis in the field of transport of radioactive materials. The behaviour of the impact limiter is influenced by a number of parameters like impact limiter construction, material properties and loading conditions. Uncertainties exist for the application of simplified numerical tools for calculations of impact limiting devices. Uncertainities exist when applying simplified numerical tools. A model describing the compression of wood in axial direction of wood under large deformations for simulation with complex numerical procedures like dynamic Finite Element Methods has not been developed yet. Therefore this thesis concentrates on deriving a physical model for the behaviour of wood and analysing the applicability of different modeling techniques. A model describing the compression of wood in axial direction under large deformations was developed on the basis of an analysis of impact limiter of prototypes of casks for radioactive materials after a 9-m-drop-test and impact tests with wooden specimens. The model describes the softening, which wood under large deformation exhibits, as a function of the lateral strain constraint. The larger the lateral strain restriction, the more energy wood can absorb. The energy absorption capacity of impact limiter depends therefore on the ability of the outer steel sheet structure to prevent wood from evading from the main absorption zone. This constitutes a model for the compression of impact limiters. In order to absorb significantly energy, wood must be stabilised by stiff cask or impact limiter structures. An elastic recovery has to be added to after the drop test measured deformations. The Projected Fringe Method for the 3-dimensional surface digitalisation was applied successfully for the first time. The method allows to determine and chart the surface of the impact limiter in advance and after the test. Therefore it is suitable for a damage and deformation documentation of impact limiting devices subjected to a drop test. A simplified numerical tool for the calculation of rigid body decelerations and impact limiter deformations was developed. This tool can be applied purposefully in the design assessment of transport casks for radioactive materials under certain limitations. For a risk analysis different accident scenarios, for instance the impact on real targets, can be evaluated and compared to the regulatory impact in a simple and cost-efficient way. A full scale model of the CONSTOR {sup registered} V/TC was subjected to a 9-m-drop-test. The rigid-body-deceleration as an evaluation scheme, which is widely used up to now is not suited for an assessment of the loading of the package under accident conditions for casks like the CONSTOR {sup registered} V/TC with large, relative to each other movable masses. The cask can not be treated as a rigid body. A substitute model on the basis of conclusions from impact limiter analysis and wooden specimen impact tests was developed for the axial compression of wood. The substitute model takes the lateral strain constraint as triaxiality of the stress field into account. The applicability of different material formulations for the substitute model as well as further modeling techniques were analysed. Of the proposed combinations none could simulate the behaviour of wood under large deformations in an acceptable manner. Different modeling strategies for impact limiter of radioactive materials transport packages were analysed and evaluated. The Finite Element Method can be applied purposeful in type assessment and in risk analysis. Prerequisite is an extensive verifiction with experimental methods, where the boundary conditions of the simulation have to be adjusted to the conditions in the impact limiter concerning lateral strain restriction. (orig.)

  18. Investigation of the behaviour of impact limiting devices of transport casks for radioactive materials in the package approval and risk analysis; Untersuchung des Verhaltens stossdaempfender Bauteile von Transportbehaeltern fuer radioaktive Stoffe in Bauartpruefung und Risikoanalyse

    Neumann, Martin


    Transport casks for radioactive materials with a Type-B package certificate have to ensure that even under severe accident scenarios the radioactive content remains safely enclosed, in an undercritical arrangement and that ionising radiation is sufficiently shielded. The impact limiter absorbs in an accident scenario the major part of the impact energy and reduces the maximum force applied on the cask body. Therefore the simulation of the behaviour of impact limiting devices of transport casks for nuclear material is of great interest for the design assessment in the package approval as well as for risk analysis in the field of transport of radioactive materials. The behaviour of the impact limiter is influenced by a number of parameters like impact limiter construction, material properties and loading conditions. Uncertainties exist for the application of simplified numerical tools for calculations of impact limiting devices. Uncertainities exist when applying simplified numerical tools. A model describing the compression of wood in axial direction of wood under large deformations for simulation with complex numerical procedures like dynamic Finite Element Methods has not been developed yet. Therefore this thesis concentrates on deriving a physical model for the behaviour of wood and analysing the applicability of different modeling techniques. A model describing the compression of wood in axial direction under large deformations was developed on the basis of an analysis of impact limiter of prototypes of casks for radioactive materials after a 9-m-drop-test and impact tests with wooden specimens. The model describes the softening, which wood under large deformation exhibits, as a function of the lateral strain constraint. The larger the lateral strain restriction, the more energy wood can absorb. The energy absorption capacity of impact limiter depends therefore on the ability of the outer steel sheet structure to prevent wood from evading from the main absorption zone. This constitutes a model for the compression of impact limiters. In order to absorb significantly energy, wood must be stabilised by stiff cask or impact limiter structures. An elastic recovery has to be added to after the drop test measured deformations. The Projected Fringe Method for the 3-dimensional surface digitalisation was applied successfully for the first time. The method allows to determine and chart the surface of the impact limiter in advance and after the test. Therefore it is suitable for a damage and deformation documentation of impact limiting devices subjected to a drop test. A simplified numerical tool for the calculation of rigid body decelerations and impact limiter deformations was developed. This tool can be applied purposefully in the design assessment of transport casks for radioactive materials under certain limitations. For a risk analysis different accident scenarios, for instance the impact on real targets, can be evaluated and compared to the regulatory impact in a simple and cost-efficient way. A full scale model of the CONSTOR {sup registered} V/TC was subjected to a 9-m-drop-test. The rigid-body-deceleration as an evaluation scheme, which is widely used up to now is not suited for an assessment of the loading of the package under accident conditions for casks like the CONSTOR {sup registered} V/TC with large, relative to each other movable masses. The cask can not be treated as a rigid body. A substitute model on the basis of conclusions from impact limiter analysis and wooden specimen impact tests was developed for the axial compression of wood. The substitute model takes the lateral strain constraint as triaxiality of the stress field into account. The applicability of different material formulations for the substitute model as well as further modeling techniques were analysed. Of the proposed combinations none could simulate the behaviour of wood under large deformations in an acceptable manner. Different modeling strategies for impact limiter of radioactive materials transport packages were analysed and evaluated. Th

  19. Radiation is invisible but causes a change in the opinions of the people; Radioaktive Strahlung ist unsichtbar, loest aber einen Klimawandel in der Bevoelkerungsmeinung aus. Meinungsklima, Risikoeinschaetzung und Informationsverhalten im Nachgang zu Fukushima

    Kristiansen, Silje; Bonfadelli, Heinz [Zurich Univ. (Switzerland). Inst. fuer Publizistikwissenschaft und Medienforschung (IPMZ)


    The nuclear accident in Japan 2011 was followed by massive media coverage. As nuclear power is a hot political topic and news media coverage is an important factor in opinion building, it is of interest to analyse what impact the catastrophe in Fukushima and the triggered media coverage had on people's opinion on nuclear power and its risks. This article is based on a survey mandated by the Swiss Federal Nuclear Safety Inspectorate (ENSI), which was carried out one year after the nuclear accident in Fukushima. Yes, the Fukushima accident did affect people's opinion on nuclear power. Even before the accident the majority of the Swiss population was against nuclear power and after the accident the negative opinion was stronger. The trust in the authorities, science and nuclear power plant operators also suffered under Fukushima, but they did catch up quite well until one year after the accident. This also reflects that the survey participants are more worried about a nuclear accident abroad than in Switzerland. Are those results based on the accident and the following media coverage? Almost 80 % mentioned to have heard or read about nuclear power and nuclear power plants in the media, so to assume an influence is not far-fetched. However only 15 % did actively search for information about nuclear power, but the big majority did talk to others about nuclear power. Thus the media coverage triggered interest and follow-up interpersonal communication. (orig.)

  20. The anti NPP movement in change. New challenges due to the search for a final repository for high-level radioactive waste; Die Anti-AKW-Bewegung im Wandel. Neue Herausforderungen durch die Endlagersuche fuer hochradioaktive Abfaelle

    Brunnengraeber, Achim [Freie Univ. Berlin (Germany). Fachbereich Politik- und Sozialwissenschaften; Freie Univ. Berlin (Germany). Forschungszentrum fuer Umweltpolitik (FFU)


    The German Bundestag has decided on June 28th, 2013 the law on the site selection (StandAG) has been enacted as ''national consensus'' for ''social peace''. The compromise is considered to solve the polarized conflict with respect to the site for an final repository for high-level radioactive waste. New challenges result for the government and the civil society.

  1. Politics and legislation related to the final disposal of radioactive wastes. Socio-juridical case study on the Konrad ore mine; Politik und Recht der Endlagerung radioaktiver Abfaelle. Mit einer rechtssoziologischen Fallstudie ueber Schacht Konrad

    Pape, Jens


    The energy revolution leads not only to build more wind turbines and the much-discussed circuit line from northern to southern Germany. Instead, the now old energy form of nuclear power needs to be handled. The disposal is one of the biggest unsolved issues of our time. In the conflict between energy and environment policies, the radioactive contamination of nuclear energy must be disposed of. The book is a highly topical compendium of legal and political aspects, which are not sufficiently taken into account because of their specialty in the public discourse. Based on the case study Konrad almost all legal and political priorities are treated very understandable.

  2. Kinetics of gasification and combustion of residues, biomass and coal in a bubbling fluidized bed; Die Kinetik der Vergasung und Verbrennung unterschiedlicher Abfaelle, Biomassen und Kohlen in der blasenbildenden Wirbelschicht

    Hamel, S.; Krumm, W. [Siegen Univ. (Gesamthochschule) (Germany). Lehrstuhl fuer Energie- und Umweltverfahrenstechnik


    The combustion and gasification characteristics of Rhenish brown coal, domestic waste, waste plastics, wood and sewage sludge were investigated in a bubbling atmospheric fluidized bed in the laboratory scale. The materials were pyrolyzed in the fluidized bed in a nitrogen atmosphere. The residual coke was combuted in the presence of oxygen with varying operating parameters or else gasified in the presence of carbon dioxide. The different materials were characterized by global combustion rates, and kinetic parameters were determined for residual coke combustion. (orig.) [Deutsch] Das Verbrennungs- und Vergasungsverhalten von Rheinischer Braunkohle, Hausmuell, Restkunststoff, Holz und Klaerschlamm wurde in einer blasenbildenden, atmosphaerischen Laborwirbelschicht untersucht. Die Einsatzstoffe wurden in der mit Stickstoff fluidisierten Wirbelschicht pyrolysiert. Der verbleibende Restkoks wurde anschliessend unter Variation der Betriebsparameter mit Sauerstoff verbrannt oder mit Kohlendioxid vergast. Die unterschiedlichen Einsatzstoffe wurden durch globale Vebrennungsraten charakterisiert. Fuer die Restkoksverbrennung wurden kinetische Parameter ermittelt. (orig.)

  3. Shaft sealing concepts for high-level radioactive waste repositories based on the host-rock options rock salt and clay stone; Schachtverschlusskonzepte fuer zukuenftige Endlager fuer hochradioaktive Abfaelle fuer die Wirtsgesteinsoptionen Steinsalz und Ton

    Kudla, Wolfram; Gruner, Matthias [TU Bergakademie Freiberg (Germany). Inst. fuer Erdbau und Spezialtiefbau; Herold, Philipp; Jobmann, Michael [DBE Technology GmbH, Peine (Germany)


    Unlike the shaft barriers used for the dry preservation of former mine workings and underground storage sites, shaft seals designed for radioactive-waste repositories must also fulfil additional requirements associated with the design diversity of the sealing system. This diversity makes use of the simple redundancy principle in order to prevent the proliferation of defects. In practice this means combining several sealing elements made from different materials or from materials with different properties. The R and D project, Shaft sealing systems for final repositories for high-level radioactive waste (ELSA) - phase 2: concept design for shaft seals and testing of the functional elements of shaft seals', which was funded by the Federal Ministry for Economic Affairs and Energy (BMWi), set out to investigate potential sealing elements for the two host-rock options rock salt and mudstone. This paper combines the text that the authors presented at the First International Freiberg Shaft Colloquium held at the Freiberg University of Mining and Technology on 01.10.2014 with a presentation on the sealing elements that were investigated as part of the R and D project.

  4. The final disposal of radioactive wastes from Germany in foreign countries; Die Endlagerung radioaktiver Abfaelle aus Deutschland im Ausland. Eine Bewertung der Rechtslage nach dem Regierungsentwurf der 14. Novelle des Atomgesetzes

    Borck, Philip


    The final disposal of radioactive wastes causes not only difficult questions with respect to the atomic law but is also related to constitutional questions of the polluter-pays-principle and the responsibility for the life conditions of future generations. The thesis discusses questions of the German and European atomic law and basic questions of the legal responsibility for radioactive wastes.

  5. Can multi-criteria analysis models support the site selection for a repository for heat-generating waste?; Koennen multikriterielle Analysemodelle die Standortauswahl fuer ein Endlager fuer Waerme entwickelnde Abfaelle unterstuetzen?

    Gutberlet, Daniela [DMT GmbH und Co.KG, Essen (Germany). Geschaeftsentwicklung Nukleare Entsorgung


    The decision for or against a potential site for a nuclear waste repository is highly complex and requires decision-makers to consider multiple assessment criteria. The complexity of each site and its characteristics, and the differing opinions among members of the public and advocacy groups mean t hat conflicts of interest are likely to arise. In this paper, the author suggests that multi-criteria analysis models could be used to provide methodological support during the selection process. The models can map these types of decision situations and suggest coherent solutions with relatively little formal effort. They allow users to compare different opt ions simultaneously and ensure that t heir decision-making Is conscious rather than arbitrary.

  6. Study on partitioning and transmutation (P and T) of high-level waste. Status of R and D. Final report; Studie zur Partitionierung und Transmutation (P and T) hochradioaktiver Abfaelle. Stand der Grundlagen- und technologischen Forschung. Abschlussbericht

    Merk, Bruno; Glivici-Cotruta, Varvara


    The main project, where this sub project contributed to, has been structured into two modules: module A (funded by the federal ministry of economics, managed by KIT) and module B (funded by the federal ministry of education and research, managed by acatech). Partners in module A were DBE TECHNOLOGY GmbH, the Gesellschaft fuer Anlagen- und Reaktorsicherheit mbH (GRS), the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), the Karlsruher Institute of Technology (KIT) and the Rheinisch-Westfaelische Technische Hochschule (RWTH) Aachen, in co-operation with the Forschungszentrum Juelich (FZJ). Modul B has been executed by the Zentrum fuer Interdisziplinaere Risiko- und Innovationsforschung der Universitaet Stuttgart (ZIRIUS). The overall coordination has been carried out by the Deutsche Akademie der Technikwissenschaften (acatech). The social implications have been evaluated in module B based on the analysis of the scientific and technological aspects in module A. Recommendations for communication and actions to be taken for the future positioning of P and T have been developed. In the project part, coordinated by HZDR - status of R and D - an overview on the whole topic P and T is given. The topic is opened by a short description of reactor systems possible for transmutation. In the following the R and D status of separation technologies, safety technology, accelerator technology, liquid metal technology, spallation target development, transmutation fuel and structural material development, as well as waste conditioning is described. The topic is completed by the specifics of transmutation systems, the basic physics and core designs, the reactor physics, the simulation tools and the development of Safety Approaches. Additionally, the status of existing irradiation facilities with fast neutron spectrum is described. Based on the current R and D status, the research and technology gaps in the topics: separation and conditioning, accelerator and spallation target, and reactor are characterized and a strategy as well as a roadmap for closing these gaps has been developed. In addition the major contributions of HZDR to the main project are described. The major parts are the description of the potential and the limits of P and T, the requirements and challenges for transmutation systems and the related efficiency, as well as the safety features of accelerator driven subcritical systems including the transient behavior and the safety characteristics.

  7. The final disposal of radioactive wastes. Are we nearing a solution to a decade-old conflict?; Die Endlagerung radioaktiver Abfaelle. Stehen wir vor der Loesung eines jahrzehntelangen Konflikts?

    Koenig, Wolfram [Bundesamt fuer Strahlenschutz (BfS), Salzgitter (Germany)


    The present article describes how the recent decision to phase out nuclear energy has created an opportunity to gain public acceptance of a nuclear waste repository in Germany. Now that the phase-out has been finalised the amount of radioactive waste requiring disposal has become quantifiable. This has created clarity as to the magnitude of the environmental problem waiting to be solved. The longer it takes to get the final storage of radioactive wastes underway the greater will be the risk that in the end nobody is prepared to assume responsibility and the cheapest solution - in the literal sense of the word - is adopted, which is to export the wastes abroad. Since more than a year the political leadership has been struggling to work out the details of a law governing the search for a final repository. The recent approval given by the government of the federal state of Lower Saxony has come in time to throw the door wide open ahead of the federal elections for a procedure that can count on broad support among the political leadership. The chances are now good for a lasting resolution to a dispute that has been carried on in the German Federal Republic for decades, sometimes with ferocity, over the risks associated with the use of nuclear energy, and they must be grabbed.

  8. Focal points of future FuE work concerning the final disposal of radioactive wastes (2011-2014); Schwerpunkte zukuenftiger FuE-Arbeiten bei der Endlagerung radioaktiver Abfaelle (2011-2014)



    The present Federal support concept is the basis for applied fundamental research concerning final disposal of heat generating radioactive wastes. The use-oriented fundamental research is aimed to the development of a scientific-technical basis for the realization of a final repository for heat-generating radioactive wastes and spent nuclear fuel, to the continuous advancement of the state of science and technology with respect to final waste disposal and a substantial contribution to the constitution, development and preservation of scientific-technological competence in the field of nuclear waste management in Germany. The concept includes research and development work concerning final disposal in the host rock salt, clays and crystalline rocks (granite). The research and development main issues are the final disposal system, the system behavior, further topics in relation to final disposal and nuclear materials surveillance.

  9. Composting - not the optimum solution for all biodegradable residues. Activation of other possibilities of utilisation; Kompostieren - nicht die beste Loesung fuer die Verwertung aller biologisch abbaubaren Abfaelle. Aktivierung anderer Verwertungsmoeglichkeiten

    Hangen, H.O. [comp.


    The management of industrial biological waste is discussed, i.e. residues in gastronomy, wood treatment, slaughterhouses, breweries, etc. Composting and fermentation processes are discussed critically as well as utilization options. (SR) [Deutsch] Die Entsorgung von industriellem Bioabfall wird behandelt. Dieser Abfall faellt in der Gastronomie, Holzbearbeitung, Schlachthaeusern, Brauereien etc. an. Kompostierungsverfahren und Vergaerungsverfahren, aber auch Verwertung von organischen Abfaellen werden kritisch diskutiert. (SR)

  10. The final disposal of radioactive wastes as social, political and scientific project - an introduction; Ewigkeitslasten. Die ''Endlagerung'' radioaktiver Abfaelle als soziales, politisches und wissenschaftliches Projekt - eine Einfuehrung

    Brunnengraeber, Achim


    The nuclear power production that was productive for two generations produces radioactive wastes that will be a hazardous and financial burden for many future generations. Science, politics, industry and the society are responsible to find a successful solution for the project of final disposal of radioactive wastes. With the fast development of renewable energies with the perspectives of sustainability and other advantages nuclear power will not have a remarkable future. The search for a final repository site is a tremendous governmental, economic and public challenge but can also be seen as a social chance. Democracy could be enforced by this process, public commitment, transparency, co-determination, confidence in political processes are indispensible premises.

  11. Climate protection, natural resources management and soil improvement by combined Energetic and Material Utilization of lignocellulosic agricultural WAstes and residues (CEMUWA); Klimaschutz, Naturressourcenschutz und Bodenverbesserung durch kombinierte energetische und stoffliche Verwertung lignozelluloser landwirtschaftlicher Abfaelle und Reststoffe

    Schuech, Andrea; Nelles, Michael; Tscherpel, Burckhard; El Behery, Ahmed; Menanz, Rania; Bahl, Hubert; Scheel, Michael; Nipkow, Mareen


    The project Climate protection, natural resources management and soil improvement by combined Energetic and Material Utilization of lignocellulosic agricultural WAstes and residues (CEMUWA) was implemented with long-term partners from Egypt and Germany leaded by the Department Waste Management and Material Flow from September 2011 until October 2013. Aim of the project was the development of technologies for the utilization of agricultural wastes and residues at the example of rice straw, with the focus on the energetic and material use. In the long term a contribution to climate protection and natural resource management could be reached. The focus was on investigations in the field of biogas, ethanol and butanol production including pretreatment as well as the material use in horticulture. The results show that the biogas and ethanol production with adapted pretreatments of rice straws is possible. The technical adaptation of a biogas plant (eo-digestion) would be associated with about 20% higher investment costs and higher operating costs with an approximately 15% higher energy demand. In Germany, however, this may still economically by the substitution of expensive or difficult available energy crops (reduction of substrate costs by 30 to 35% for a 600 kWel-BGP using maize silage). The investigated solutions for material use in Egypt showed good results, which in some cases exceeded the expectations. By the use of rice straw imported peat substrates could be substitute or irrigation water saved, what is ecologically and economically useful. The production of ethanol from rice straw was implemented on laboratory scale and preconditions for investigations in semi-industrial and partly pilot scale were created. The bilateral project'' was funded in the framework of the German-Egypt-Research-Fond (GERF) by the German Federal Ministry of Education and Research (BMBF) and the Egyptian Science and Technology Development Fund in Egypt (STDF). The total budget was 225.000,- EUR (funding for the University of Rostock: 87.813,00 EUR, for the Egyptian partners: 99.909,00 EUR).

  12. Springer收购WoltersKluwe的Pharma销售和出版服务



  13. Dirty Air at the North Pole. Industrial exhaust pollutes the Arctic region; Dicke Luft am Nordpol. Wie Industrieabgase die Arktis verschmutzen

    Herber, A. [Alfred-Wegener-Institut fuer Polar- und Meeresforschung (AWI), Bremerhaven (Germany); Lange, G.


    After the long polar night, greyish brown haze often hangs over the Arctic landscape. A new 'stellar photometer' which functions also in the dark winter months recently identified its causes. At the North Pole, smog appears to enhance the 'greenhouse effect'. [German] Nach der langen Polarnacht liegen oft graubraune Dunstschwaden ueber der Arktis. Woher kommen und wie entstehen sie? Mit einem neu entwickelten 'Sternfotometer', das auch in den dunklen Wintermonaten Schwebstoffe in der Luft messen kann, liess sich diese Frage jetzt endgueltig klaeren. Anders als in mittleren Breiten scheint der Smog am Nordpol den Treibhauseffekt zu verstaerken. (orig.)

  14. Status quo of the storage of C-14 containing waste from German high-temperature and research reactors and the strategy for their future storage; Status quo der Lagerung C-14-haltiger Abfaelle aus deutschen Hochtemperatur- und Forschungsreaktoren und Strategie zu deren kuenftigen Endlagerung. Abschlussbericht

    Doerr, S.; Bollingerfehr, W.; Filbert, W.


    The German research reactors and the high-temperature reactors (AVR, THTR 300) used graphite as reflector and/or moderator materials. Due to the activation of these materials there exists a significant amount of C-14, H-3 and Co-60.The project included the assessment of the respective amount of materials from all facilities, the legal framework for interim storage, transport and final disposal.

  15. Health hazards of municipal-waste disposal. Microbiological and medical knowledge available for primary and secondary preventive action to avoid health hazards during disposal and recycling of municipal wastes, especially biowastes. Papers. Gesundheitsrisiken bei der Entsorgung kommunaler Abfaelle. Mikrobiologische und medizinische Grundlagen der Primaer- und Sekundaerpraevention von Gesundheitsstoerungen bei der Sammlung und Aufbereitung von kommunalen Abfaellen - insbesondere Bioabfaellen. Beitraege

    Stalder, K. (ed.); Verkoyen, C. (ed.)


    Little is known so far about the concentrations of germs and bacteria released to the air during waste disposal and recycling processes and about microorganisms which develop during biowaste composting. Some of these typical germs are assumed to be infectious and pathogenic, and thermophilic actinomyces which are known to cause exogenous allergic alveolitis must be expected. The introduction of suitable preventive measures requires an exact knowledge of the exposure to infection and of the health hazards involved. The preliminary results of a pilot project within the framework of the BMFT work and technology project are introduced, i.e. assessment of the exposure to microorganisms by the types and concentrations which occur in typical waste disposal and recycling workplaces, methodical evaluation of occupational exposure, development of proposals for occupational safety and health, and development of immunological methods for the early detection of thermophilic actinomyces sensitization. (vhe)

  16. Criteria report intermediate storage facility. Criteria for the evaluation of potential sites for an intermediate above-ground-storage facility for retrieves radioactive waste from the Asse II cavern; Kriterienbericht Zwischenlager. Kriterien zur Bewertung potenzieller Standorte fuer ein uebertaegiges Zwischenlager fuer die rueckgeholten radioaktiven Abfaelle aus der Schachtanlage Asse II



    The BfS judged that the retrieval of the radioactive wastes from the Schacht Asse II is the best option for decommissioning. The recovered radioactive wastes shall be transported in special containers and conditioned in facilities near the site for the transport in a final repository. The criteria for the site selection for the required intermediate above-ground intermediate storage facility are defined including the criteria for the evaluation procedure.

  17. Behaviour at landfills of waste having undergone mechanic-biological and thermal conditioning; Deponieverhalten mechanisch-biologisch und thermisch behandelten Restabfalls

    Danhamer, H.; Dach, J.; Jager, J. [Institut WAR, Darmstadt (Germany). FG Abfalltechnik


    The work studies, in landfill test reactors, water, gas and heat transport as well as gas and leachate formation in waste having undergone mechanical-biological and thermal conditioning. (orig.) [Deutsch] Es wurde der Wasser-, Gas- und Waermetransport, sowie die Gasbildung- und Sickerwasserbelastung mechanisch-biologisch und thermisch vorbehandelter Abfaelle in Deponieversuchsreaktoren untersucht. (orig.)

  18. Expertise on the provision of evidence with respect to Nagra's disposal concept for spent fuel assemblies, vitrified high-level radioactive waste as well as for long-living intermediate-level wastes (Opalinus clay project); Gutachten zum Entsorgungsnachweis der Nagra fuer abgebrannte Brennelemente, verglaste hochaktive sowie langlebige mittelaktive Abfaelle (Projekt Opalinuston)



    Mankind has been living in a field of natural radiation; in Switzerland, the natural dose is around 3 mSv per year. It can be assumed that an artificial dose smaller than the natural one is harmless and can therefore be tolerated. However, nuclear power plants, medicine, industry and research produce radioactive wastes whose radioactivity is mostly higher than the natural level. These wastes must therefore be concentrated and enclosed until the decay reduces the dose rate to a harmless level. For this, it is foreseen that the radioactive wastes will be disposed of in deep-lying geological strata. The enclosure must be guarantied in such a way that, at any time, the radiation suffered by mankind and environment due to the radioactive wastes stays under the statutory limit of 1 mSv/a. The judgement of the quality of the deep underground repository is divided into 3 chapters: a) based on the geological and hydro-geological properties of the host rock, the proof of safety shows that the chosen repository site is safe for the long term; b) the proof of site guaranties that the repository needed can be built in the chosen host rock; c) the proof of implementation demonstrates that the repository can be built with the actual technical means proposed. The forecast for the development of the safety of the repository in the long term is fairly inaccurate, the most difficult factor being the developments in mankind's way of life. Therefore, conservative assumptions must be taken into account to cover even the most unlikely cases. The former project 'Gewaehr' presented by the National Co-operative for the Disposal of Nuclear Wastes (NAGRA) in 1978 was based on crystalline rock; it was rejected because it was not possible to find a sufficiently large area without geologic faults for the repository. In new investigations, NAGRA found a suitable layer of Opalinus clay in Zurich's Weinland. In the neighbourhood of the layer discovered, there are neither noticeable beds of other materials nor is there geothermal potential in deep geological layers, which could cause possible conflicts with an underground repository. NAGRA research demonstrates that the bed of Opalinus clay has sufficient dimensions, a very low permeability, undisturbed stratification and that the rock has suitable mechanical properties and exhibits long-term geological stability. As far as this site is concerned, NAGRA has shown that, at suitable depth, a sufficiently large domain of Opalinus clay exists which shows the required safety properties for a geological underground repository. For the construction of a repository, however, more scientific data has to be obtained: a) the neighbouring rock layers below and above the Opalinus clay layer must be characterised in more detail; b) the hydro-geological data bases must be widened and confirmed, including data on the neighbouring layers; c) the erosion process resulting from possible glaciers has to be better understood. On the basis of the mechanical rock properties of Opalinus clay, building a deep repository is considered possible in the layer found at the proposed depth. After disposal of the wastes, the repository will be back-filled in such a way that it would be possible to retrieve the waste containers, as long as the ramps and tunnels are not sealed. The safety of the waste disposal facility is defined by 3 main elements: a) the radioactive wastes have to be disposed of in an underground repository far from man's living environment; b) the radioactive materials must stay safely enclosed in the repository until their radioactivity has decreased through radioactive decay; c) the release of radioactive materials may not produce such levels of radioactivity that are harmful to man or the environment. For this purpose, the NAGRA project foresees many technical and natural barriers: 1) the radioactive wastes are fixed in stable chemical matrices which are practically not soluble in water; 2) the spent fuel assemblies (FA) and the high-level waste (HAA) barrels are packed into containers which guarantee absolute enclosure for at least 10,000 years; 3) the FA and HAA containers are stored in a tight Bentonite filling (cement for the low- and intermediate-level wastes, LMA) which at first slows down the access of corrosive substances to the containers and then diminishes the release of wastes; 4) the water- tightness of the surrounding Opalinus clay prevents any contact with water; 5) the rock layers above and below the Opalinus clay protect the host rock and the repository against natural or human influences; 6) the choice of a stable and settled tectonic site guarantees suitable conditions for at last 1 million years. With these characteristics for the repository, the safety analyses show that even for the most conservative conditions the calculated radioactive dose mostly remains below the statutory limit of 1 mSv/a

  19. The function of thermal treatment of waste in the Vienna waste management concept; Die Funktion der thermischen Abfallbehandlung im Abfallwirtschaftskonzept von Wien

    Loeschau, M. [Technische Univ. Berlin (Germany). Fachgebiet Abfallwirtschaft


    Thermal waste treatment has a key role in the waste management system of Vienna. As landfills will be prohibited and waste volumes will increase, further capacities will have to be provided. Another incinerator will be constructed in order to reduce the waste volume, to relieve landfills, to reduce the cost of land regeneration after pollution, and to provide additional energy for district heating. (orig.) [German] Die thermischen Abfallbehandlungsanlagen nehmen im Wiener Abfallwirtschaftssystem eine Schluesselrolle ein. Sie sind nach derzeitigem Stand der Technik das nachhaltigste Entsorgungsverfahren fuer nicht schadlos verwertbare Abfaelle. Aufgrund des Deponierungsverbots der Deponieverordnung fuer unzureichend behandelte Abfaelle sowie der prognostizierten Zunahme von Restmuellaufkommens muessen in Wien kuenftig weitere Behandlungskapazitaeten geschaffen werden. Mit dem Bau einer weiteren Muellverbrennungsanlage werden die abzulagernden Abfallmengen und die entstehenden Umweltbelastungen durch ihre Deponierung reduziert, Altlastenbeitraege gespart sowie zusaetzliche Energie fuer die Fernwaermeversorgung bereitgestellt. (orig.)

  20. The Pyromelt process; Das Pyromelt-Verfahren

    Redepenning, H.; Kremer, H.; Rizzon, H. [ML Entsorgungs- und Energieanlagen GmbH, Ratingen (Germany)


    PyroMelt is a thermal process for waste treatment by pyrolysis followed by a melting stage. The pyrolysis process produces the more or less homogeneous products pyrolysis gas, oil, and coke. In the melting stage, the inorganic constituents of the waste materials are converted into an eluation-resistant, recyclable granulated slag, while the organic constitutents are combusted completely without residues. (orig) [Deutsch] PyroMelt ist ein thermisches Verfahren zur Behandlung von Abfaellen durch eine Kombination aus Pyrolyse mit einer nachgeschalteten Einschmelzung. Die Pyrolyse uebernimmt die Aufgabe der thermischen Vorbehandlung der Abfaelle in die vergleichsweise homogenen Produkte Pyrolysegas, -oel und -koks. In der Einschmelzung werden die anorganischen Bestandteile der Abfaelle in eine eluationsresistentes und verwertbares Schlackegranulat ueberfuehrt. Gleichzeitig werden die organischen Abfallbestandteile vollstaendig ausgebrannt. (orig)

  1. The long path to a disposal for high radioactive waste. Pt. 3. A new approach for a better understanding of processes and the system in a whole; Auf dem langen Weg zu einem Endlager fuer hochradioaktive, Waerme entwickelnde Abfaelle. T. 3. Ein neuer konzeptionell-konfigurativer Ansatz und ein neues Simulationswerkzeug zur Erarbeitung eines verbesserten Prozess- und Systemverstaendnisses fuer HAW-Entsorgungsanlagen - ohne und mit direktem laengerfristigem Monitoring

    Lux, Karl-Heinz; Wolters, Ralf; Zhao, Juan [Technische Univ. Clausthal, Clausthal-Zellerfeld (Germany). Inst. fuer Aufbereitung, Deponiertechnik und Geomechanik


    A new conceptual@configurative approach and a new simulation tool for the development of an improved process and system understanding for HAW disposal systems - without and with direct long-term monitoring are presented and discussed. With regard to the final repository development, a retrieveability of the heat-generating high-radio-active waste during the storage phase and a general recoverability during the first 500 years after closure of the repository in the post-closure phase are required. Both for the monitoring of the repository during the storage phase as well as thereafter, a direct monitoring of the storage horizon could be implemented as an alternative to an indirect monitoring.

  2. Specifications for cofermentation of biogenic waste in communal sewage plants; Anforderungen an die Mitbehandlung von biogenen Abfaellen in Faulbehaeltern oeffentlicher Klaeranlagen

    Mertsch, V.; Pawlowski, S. [Ministerium fuer Umwelt und Naturschutz, Landwirtschaft und Verbraucherschutz des Landes Nordrhein-Westfalen, Duesseldorf (Germany)


    In principle, cofermentation of biogenic waste will result in higher pollutant concentrations in surface water. On the other hand, the authors show that in some cases the eco-balance in total may be positive. This is proved for six different types of waste, provided that effluent discharge is ecologically compatible, digestion tank and sewage system capacities are sufficient, pollutant concentrations in the biogenic waste materials are low and a hygienization pretreatment is carried out on the waste materials. Eco-balances are recommended for all types of biogenic waste prior to cofermentation. [German] Es zeigt sich, dass die Mitbehandlung von biogenen Abfaellen in Faultuermen oeffentlicher Klaeranlagen nur im Einzelfall oekologisch sinnvoll und wasserwirtschaftlich vertretbar ist. Dies spiegelt sich auch in den engen rechtlichen Rahmenbedingungen fuer die Mitbehandlung von Abfaellen in kommunalen Klaeranlagen wider. Grundsaetzlich ist davon auszugehen, dass die Coferementation zu einer erhoehten Gewaesserbelastung fuehrt. Die Mitbehandlung von biogenen Abfaellen in oeffentlichen Klaeranlagen kann allerdings im Vergleich zu anderen Beseitigungsalternativen fuer den Abfall eine insgesamt positive Oekobilanz aufweisen. Fuer sechs Abfallarten konnte dies nachgewiesen werden. Fuer diese Abfallarten ist eine Mitbehandlung in oeffentlichen Klaeranlagen grundsaetzlich denkbar. Voraussetzung ist, dass die Abwassereinleitung gewaesservertraeglich ist, der Faulturm und die Klaeranlage insgesamt ueber die notwendigen Kapazitaeten verfuegen, die Schadstoffbelastung der biogenen Abfaelle gering ist, weiterhin - sofern erforderlich (Regelfall) - eine hygienisierende Vorbehandlung der biogenen Abfaelle durchgefuehrt wird und die sonstigen Regeln der Technik fuer die Mitbehandlung von Abfaellen in kommunalen Klaeranlagen eingehalten werden. Fuer andere biogene Abfaelle, die im Faulturm einer Klaeranlage mitbehandelt werden sollen, gilt, dass deren Eignung im Rahmen einer

  3. Forprojekt vedrørende etablering af et isotopcenter på Risø

    Honoré, J.; Majborn, B.; Damsgaard, J.K.

    På baggrund af Risøs særlige rolle på det nukleare og strålingsmæssige område og erfaring i håndtering af radioaktive isotoper er det foreslået at etablere en FDG-produktion på Risø som en del af et fremtidigt nationalt isotopcenter. Det er hensigten, atproduktionen skal ske med henblik på en sik...... tillægemiddelfremstilling. Den samlede investering vil være 31,9 millioner kr., heraf 12 mio. til indkøb af en cyklotron, 3,3 mio. til udstyr m.m. og 16,6 mio. til bygningsinvesteringer....

  4. Perspectives of the waste management and raw materials industry in Germany; Perspektiven der Entsorgungs- und Rohstoffwirtschaft in Deutschland

    Kurth, Peter [Bundesverband der Deutschen Entsorgungs-, Wasser- und Rohstoffwirtschaft e.V. (BDE), Berlin (Germany)


    In order to provide the industrial structures that are necessary for ecologically and economically effective waste management and recycling - from the collecting of valuable waste materials to the marketing of the secondary raw materials obtained -, the BDE (Bundesverband der Deutschen Entsorgungswirtschaft e.V., Federal Association of the German Waste Management Industry) considers that free movement of goods must be ensured in the whole European Union. This means Europe-wide prohibition of dumping of untreated waste, common European environmental standards and their enforcement. If the potential of waste materials is to be developed in Europe, politicians must develop consequent understanding of waste as a raw material and commodity. Europe needs open frontiers and free trade in this important sector. (orig.) [German] Um die fuer eine oekologisch und oekonomisch effektive Kreislaufwirtschaft zwingend erforderlichen industriellen Strukturen - von der Sammlung werthaltiger Abfaelle bis hin zur Vermarktung der gewonnenen Sekundaerrohstoffe - zu schaffen, muss aus Sicht des BDE fuer alle Abfallstroeme der Grundsatz der Warenverkehrsfreiheit im gesamten Bereich der Europaeischen Union gelten. Voraussetzungen dafuer sind ein europaweites Deponieverbot fuer unbehandelte Abfaelle, europaweit einheitliche Umweltstandards und ein einheitlicher Vollzug. Wenn wir tatsaechlich das Potenzial, das im europaeischen Abfallberg steckt, heben wollen, muss auch die Politik ein konsequentes Verstaendnis fuer die Ressource Abfall als Ware entwickeln. Wir brauchen in Europa fuer diesen wichtigen Stoffstrom offene Grenzen und freien Handel. (orig.)

  5. The legal framework governing waste utilisation in mining; Der rechtliche Rahmen der Abfallverwertung im Bergbau

    Frenz, W. [RWTH Aachen (Germany). Lehr- und Forschungsgebiet Berg- und Umweltrecht


    Seen from the legal aspect, waste utilisation in mining is generally a very difficult issue, particularly as regards waste management law. Here it poses various problems which concern the fundamental principles of waste management law. These issues are increasingly coming under the influence of European law, which in its present state already imposes a very differentiated, absolutely binding regime on member states. Moreover, its demarcation between reutilisation and removal is decisive for the legal consequences that follow. Some Laender impose obligations to offer for sale or surrender as well as more stringent monitoring and proof requirements for hazardous wastes. EU member states also have more powerful rights of objection when it comes to the transboundary movement of waste destined for disposal. [German] Die Abfallverwertung im Bergbau ist insgesamt ein rechtlich sehr schwieriges Thema. Das gilt einmal in abfallrechtlicher Hinsicht. Hier werden verschiedene Probleme relevant, welche die Grundlagen des Abfallrechts betreffen. Das ist insbesondere die in diesem Bereich schwierige Abgrenzungsfrage zwischen Verwertung und Beseitigung. Mehr und mehr wird diese Problematik vom Europarecht gepraegt, welches bereits ein sehr differenziertes und fuer die Mitgliedstaaten verbindliches Abfallregime statuiert. Die Abgrenzung von Verwertung und Beseitigung entscheidet zudem ueber den Eintritt unterschiedlichster Rechtsfolgen. Fuer gefaehrliche Abfaelle bestehen in manchen Bundeslaendern Andienungs- und Ueberlassungspflichten und strengere Nachweis- und Ueberwachungsanforderungen. Im Rahmen der grenzueberschreitenden Verbringung von Abfaellen stehen den Mitgliedstaaten staerkere Einwendungsmoeglichkeiten zu, wenn es sich um Abfaelle zur Beseitigung handelt. (orig.)

  6. Environmental data 1995; Umweltdaten Deutschland 1995



    The brochure contains concise data on pollution sources and pollutant effects on the environment (land use, airborne pollutants, liquid effluents, waste, noise, etc.), data on environment quality (air pollution levels, water quality, diversity of species, etc.), and data on the social effects of environmental pollution (environmental protection expenditures, market shares of low-polluting passenger cars and unleaded fuel, biological sewage treatment systems, etc.). All these data are suitable indicators for describing the current environmental situation. (orig./KW) [Deutsch] Die Broschuero umfasst in komprimierter Weise - Daten zu den Verursachern von Umweltbelastungen und zu den Einwirkungen auf die Umwelt (Bodennutzung, Luftemissionen, Abwasser, Abfaelle, Laerm etc.), - Daten zur Qualitaet der Umwelt (Immissionen, Gewaesserguete, Artenvielfalt etc.) sowie - Daten zur gesellschaftlichen Reaktion auf die Umweltbelastung (Ausgaben fuer den Umweltschutz, Anteil schadstoffarmer Pkw und bleifreien Benzins, Anschluss der Bevoelkerung an biologische Klaeranlagen etc.), die als Indikatoren zur Beschreibung der Umweltsituation geeignet erscheinen. (orig./KW)

  7. Physical and thermal waste utilisation in the nonferrous metal industry; Stoffliche und thermische Abfallverwertung in der Nichteisenmetallindustrie

    Sowa, F. [DMT-Gesellschaft fuer Forschung und Pruefung mbH, Essen (Germany)


    In its amended form the German Household Waste Technical Code favours physical and thermal utilisation of wastes against dumping. Industrial processes offer various ways of utilising wastes with a high calorific value, e.g. in nonferrous metal production. Besides portraying this branch of industry in Germany the present paper investigates to what extent this topic has already found coverage and what potential it holds for the utilisation of wastes. By way of example it describes a successful demonstration of the physical utilisation of sewage sludge in lead production. [Deutsch] Die Neugestaltung der TA Siedlungsabfall favorisiert die thermische und stoffliche Verwertung von Abfallstoffen gegenueber der Deponierung. Moeglichkeiten fuer die Verwertung heizwertreicher Abfaelle bieten auch industrielle Produktionsprozesse, z.B. auch in der Nichteisenmetallerzeugung. Neben einer Charakterisierung der Branche wird untersucht, inwieweit dieses Thema bereits aufgegriffen worden ist und welches Verwertungspotential zur Verfuegung steht. An einem Beispiel wird die erfolgreiche Demonstration der stofflichen Verwertung von Klaerschlamm in der Bleierzeugung dargestellt. (orig.)

  8. Part project 1. Methods and concepts of biological waste composting. Comparison - evaluation - recommendations; Teilbericht 1. Verfahren und Konzepte der Bioabfallkompostierung. Vergleich - Bewertung - Empfehlungen

    Gronauer, A.; Helm, M.; Schoen, H. [Bayerische Landesanstalt fuer Landtechnik der Technischen Univ. Muenchen-Weihenstephan (Germany)


    Topics of this article are: composting of biological wastes; techniques, operation modes, regional concepts, engineering, hygienical, ecological, economical aspects. (SR) gardening plots. The project comprised three parts: Composting techniques, applications of compost in agriculture and gardening, and applications in landscaping. This volume comprises the summaries of the three part-projects. (orig./SR) [Deutsch] Das uebergeordnete Ziel des Weihenstephaner Verbundvorhabens bestand darin, fachliche Grundlagen und Entscheidungshilfen fuer den Bereich der Kompostierung und der Verwertung von biogenen Reststoffen, insbesondere der getrennt erfassten organischen Abfaelle aus den Haushaltungen (Bioabfall), zu schaffen. In diesem Rahmen sollen sowohl verschiedene Verfahren und Techniken der Kompostierung als auch regionale Konzepte hinsichtlich verfahrenstechnischer, hygienischer, oekologischer, oekonomischer und die Entsorgungssicherheit betreffender Aspekte untersucht und bewertet werden. (orig./SR)

  9. Technical conference on air, noise, and waste - current information for multipliers in industry. Current information for multipliers in industry; Fachtagung Luft, Laerm, Abfall - Aktuelle Informationen fuer Multiplikatoren der Wirtschaft. Aktuelle Informationen fuer Multiplikatoren der Wirtschaft



    The Bavarian Environmental Office informed on the new information and documentation centre for environmental technology and environmental management (IDZ), new amendments to air pollution abatement legislation and their implementation, experience from the practical application of the amended TA Laerm (Noise Regulation), the Ordinance on Noise Emitted by Equipment and Machines, and methods of supervising the disposal of classified waste according to the Ordinance on Waste from Small Industries (Gewerbeabfallverordnung). [German] DAs bayerische Landesamt fuer Umweltschutz informierte in der Tagung ueber: IDZ - Informations und Dokumentationszentrum fuer Umwelttechnologie und umweltmanagement, aktuelle Aenderungen der Gesetzgebung zur Luftreinhaltung und ihre Anwendung, Erfahrungen aus dem Vollzug der Aenderung der TA Laerm, Geraete und Maschinenlaermschutzverordnung und Nachweisverfahren ueber die Entsorgung ueberwachungsbeduerftiger Abfaelle in der Gewerbeabfallverordung. (uke)

  10. Operating experience with innovative environmental technologies; Betriebserfahrungen mit innovativen Umwelttechnologien

    Spindler, H.; Bauermeister, U.; Kliche, H.; Seiffarth, K. (comps.)


    The MUT '99 (Merseburger Umwelt-Tag) discussed modern processes, technologies and plants for treatment and utilisation of waste. The conference was attended by industrial organisations and scientific institutions. [German] Der 9. Merseburger Umwelt-Tag MUT '99 steht unter dem Motto 'Betriebserfahrungen mit innovativen Umwelttechnologien - Moderne wirtschaftliche Verfahren, Technologien und Anlagen zur Behandlung/Verwertung nichtvermeidbaren Abfalls', wobei der Begriff 'Abfall' sich letztlich auf alle Umweltmedien bezieht. Entsprechend dem Motto dieser Tagung stellen Unternehmen, Betriebe und wissenschaftliche Einrichtungen ihre Erfahrungen auf dem Gebiet der Umwelttechnologien vor, um Entwicklungen auf diesem Gebiet einer breiten Diskussion zu eroeffnen. Dabei soll es insbesondere um die Behandlung nicht vermeidbarer Abfaelle und Abwaesser gehen. (orig.)

  11. Development of the status of W and T for the realization of a long-term safety demonstration for the final repository using the examples VSG and Konrad. Report on the Working package 2. Review and development of safety-related assessments of disposal facilities of wastes with negligible heat generation; development and provision of the necessary set of tools using the example of the final repository Konrad; Entwicklung des Standes von W and T bei der Fuehrung eines Langzeitsicherheitsnachweises fuer Endlager an den Beispielen VSG und Konrad. Bericht zum Arbeitspaket 2. Untersuchung und Entwicklung von sicherheitstechnischen Bewertungen fuer Endlager fuer Abfaelle mit vernachlaessigbarer Waermeentwicklung und Bereitstellung des notwendigen Instrumentariums am Beispiel des Endlagers Konrad

    Larue, Juergen; Fischer-Appelt, Klaus; Hartwig-Thurat, Eva


    In the research project on the ''Review and development of safety-related assessments of disposal facilities with negligible heat generation; development and provision of the necessary set of tools, using the example of the Konrad disposal facility'' (3612R03410), the state of the art in science and technology of the safety-related assessments and sets of tools for building a safety case was examined. The reports pertaining to the two work packages described the further development of the methodology for accident analyses (WP 1) and of building a safety case (WP 2); also, comparisons were drawn on a national and international scale with the methods applied in the licensing procedure of the Konrad disposal facility. A safety case as well as its underlying analyses and methods always has to be brought up to date with the development of the state of the art in science and technology. In Germany, two safety cases regarding the long-term safety of disposal facilities have been prepared. These are the licensing documentation for the Konrad disposal facility in the year 1990 and the research project regarding the preliminary safety case for the Gorleben site (Vorlaeufige Sicherheitsanalyse Gorleben - VSG) in the year 2013, both reflecting the state of development of building a safety case at the respective time. Comparing the two above-mentioned examples of safety cases and taking recent international recommendations and national regulations into account, this report on Work Package 2 presents the development of the international state of the art in science and technology. This has been done by summarising the essential differences and similarities of each element of the safety case for the Konrad disposal facility on the one hand and the VSG and the international status on the other hand.

  12. Operating results and new trends in combined materials recycling and power generation from waste materials at Schwarze Pumpe GmbH (SVZ); Betriebserfahrungen und neue Entwicklungen zur kombinierten stofflichen und energetischen Abfallverwertung in dem Sekundaerrohstoffverwertunngszentrum Schwarze Pumpe GmbH (SVZ)

    Seifert, W.; Buttker, B. [SVZ Schwarze Pumpe GmbH (Germany); Vierrath, H. [Lurgi Umwelt GmbH, Frankfurt am Main (Germany)


    SVZ Schwarze Pumpe is a plant for production of synthesis gas from hydrocarbon-containing materials and for synthesis gas utilisation as chemical feedstock and for power generation. In the trial operation phase of 1992-1994 and the commercial operation since 1995, about 372,800 t of solid waste were processed (about 255,100 t of which were waste platics), and about 372,800 t of liquid and pasty waste. The waste composition may vary considerably. Since 1995, gasification of preprocessed domestic waste has been an area of particular interest. In all cases, pollutant emissions were found to be below the legal specifications. The synthesis gas has a high degree of purity, while the gasifier slag is classified as class I waste as specified in the TA Siedlungsabfall (Technical Code for Domestic Waste Management). (orig./SR) [Deutsch] Der Geschaeftszweck des SVZ Schwarze Pumpe besteht in der Herstellung von Synthesegas aus kohlenwasserstoffhaltigen Einsatzstoffen und in der stofflichen und energetischen Nutzung des Werkstoffes Synthesegas. In umfangreichen Mess- und Betriebsfahrten wurden in den Jahren 1992-1994 und im kommerziellen Betrieb seit 1995 ca. 372.800 t feste Abfallstoffe, davon ca. 255.100 t Altkunststoffe, und ca. 436.800 t fluessige und pastoese Abfaelle verarbeitet. Die Abfaelle werden in Mischungen, die in weiten Grenzen variiert werden koennen, eingesetzt. Einen besonderen Entwicklungsschwerpunkt seit 1995 stellt die Vergasung von speziell aufbereitetem Hausmuell dar. In allen Betriebsfaellen konnte ein sehr umweltvertraeglicher Betrieb nachgewiesen werden. Das erzeugte Synthesegas ist extrem gereinigt, die Vergaserschlacken erfuellen die Anforderungen an die Deponieklasse I der TA Siedlungsabfall. (orig./SR)

  13. Recycling systems and material flows from the viewpoint of thermal waste treatment; Kreislaufwirtschaft- und Stoffstrombetrachtungen aus Sicht der thermischen Abfallbehandlung

    Johnke, B. [Umweltbundesamt, Berlin (Germany); Mast, P.G. [Tauw Umwelt GmbH, Berlin (Germany)


    Material stream analysis can serve as a basis for decisions on which materials should be kept in circulation, and in what quantity, and which materials it is better to remove from the recycling system and dispose of as waste. Wastes destined for disposal are mostly transferred to waste treatment plants and landfills. The role of thermal treatment as part of the disposal system is to destroy or decompose organic pollutants contained in the waste, concentrate and remove inorganic pollutants, make the heat arising during the treatment process available for use as energy, and make the greatest possible physical use of the treatment residues. The present paper reviews the current regulations for the promotion of recycling and investigates selected material streams and the fate of these materials. In connection with the residue quality of household waste incineration slag as a thermal waste treatment product it also considers the influence of waste management measures on wastes destined for disposal. [Deutsch] Stoffstrombetrachtungen koennen als Grundlage fuer Entscheidungen dienen, welche Stoffe in welchem Umfang im Kreislauf verbleiben oder wieder integriert werden sollten und welche besser als Abfall zur Beseitigung aus dem Kreislaufsystem auszuschleusen sind. Fuer Abfaelle zur Beseitigung wird diese Aufgabe i.d.R. von thermischen Abfallbehandlungsanlagen und Deponien uebernommen. Im Rahmen der Entsorgung kommt der thermischen Behandlung dabei die Aufgabe zu, die im Abfall zur Beseitigung enthaltenen organischen Schadstoffe zu zerstoeren oder abzubauen, anorganische Schadstoffe aufzukonzentrieren und auszuschleusen, die bei dem Behandlungsprozess entstehende Waerme einer weitgehenden Energienutzung zuzufuehren und die Rueckstaende aus der Behandlung so weit wie moeglich stofflich zu verwerten. Nachfolgend sollen insbesondere die Regelungen zur Unterstuetzung der Kreislaufwirtschaft, ausgewaehlte Stofffluesse und der Verbleib dieser Stoffe und Materialien und der

  14. Radiostrontium, radiocesium and stable mineral composition of bones of domestic reindeer from Vågå, Norway

    Hans Staaland


    Full Text Available Radiostrontium, radiocesium and macromineral concentrations were measured in metatarsal or metacarpal bones from 78 reindeer (59 calves and 19 adults in the Vågå reindeer herding district in Southern Norway. Samples were collected in the period August 1988 to May 1989. Radiocesium concentrations increased from August through the winter. Radiostrontium varied slightly around an average value 1810 Bq/kg DM. Mg concentrations decreased through the winter, the concentrations of other minerals and bone density showed only small variations. No signs of mineral deficiencies were observed. It is concluded that radiostrontium mainly originated from the Chernobyl nuclear accident.Radiostrontium, radiocesium og stabile mineraler in reinknokler fra Vågå, NorgeAbstract in Norwegian / Sammendrag: Innhold av radiostrontium, radiocesium og makromineraler ble målt i reinsdyrknokler (metatarsus og metacarpus innsamlet fra 78 dyr (59 kalver og 19 voksne tilhørende Vågå tamreinlag. Prøvene ble samlet i perioden august 1988 til mai 1989. Innholdet av radiocesium økte fra august og gjennom vinteren, mens innholdet av radiostrontium var temmelig konstant (1810 Bq/ kg tørrstoff. Magnesium innholdet avtok gjennom vinteren, mens innholdet av andre mineraler samt knoklenes tetthet varierte lite. Det ble ikke observert noen tegn på mineralmangel. Mesteparten av det radioaktive strontium kom fra atomkraftulykken i Tsjernobyl.

  15. Radiological consequences of the Chernobyl reactor accident; Radiologische Folgen des Tschernobyl-Ungluecks

    Jacob, P.


    Large areas of Belarus, Russia, and the Ukraine have been highly contaminated by the radioactive fallout from the reactor accident at Chernobyl. The most affected areas are around Chernobyl and east of Gomel in Belarus, where part of the radioactive fallout came down with rain. The article maps the radioactive contamination through cesium 137 and iodine 131, and summarizes the immediate action taken at the time, as well as long-term remedial action for decontamination of soils. Data are given on the radiation exposure of the population, in particular doses to the thyroid, and prognoses on the incidence of thyroid cancer. (VHE) [Deutsch] Durch den Reaktorunfall von Tschernobyl wurden groessere Flaechen von Belarus, Russland und der Ukraine stark radioaktiv kontaminiert. Besonders betroffen sind die Umgebung von Tschernobyl sowie die Gegend oestlich von Gomel (Belarus), wo die radioaktive Wolke teilweise ausregnete. Der Artikel beschreibt die Belastung mit Caesium 137 und Iod 131 sowie die ergriffenen Sofortmassnahmen und die langfristigen Massnahmen zur Dekontamination der betroffenen Boeden. Die Strahlenbelastung der Bevoelkerung, v.a. die Schilddruesendosen, werden beschrieben, fuer Schilddruesenkrebs werden Prognosen gegeben. (VHE)

  16. The recommendations of the Commission to review the financing of the nuclear power phase-out (KFK); Die Empfehlungen der Kommission zur Ueberpruefung der Finanzierung des Kernenergieausstiegs (KFK)

    Ziehm, Cornelia


    Endlagerung der radioaktiven Abfaelle und die dafuer notwendigen Mittel dem Staat zur Sicherung uebertragen werden. Fuer die verbleibenden Aufgaben, also insbesondere der Stilllegung und des Rueckbaus der Atomkraftwerke und die Verpackung der radioaktiven Abfaelle zur Zwischenlagerung, sollen die Aufgaben und die Finanzsicherung bei den Unternehmen verbleiben. Fuer die Zwischen- und Endlagerung soll ein oeffentlich-rechtlicher Fonds eingerichtet werden. Gegen eine vollstaendige Einzahlung von insgesamt 23,3 Mrd. Euro sollen die Risiken fuer die Zwischen- und Endlagerung auf den Staat uebergehen. Mit der vollstaendigen Uebertragung der Mittel sowie der erfolgten Zahlung des vollen Risikozuschlags soll die Haftung der Betreiber fuer Zwischenlagerung und Endlagerung enden. Fuer Stilllegung und Rueckbau der Atomkraftwerke und die Verpackung der radioaktiven Abfaelle soll es danach weiterhin beim System der handelsrechtlichen Rueckstellungen bleiben. Im Hinblick auf Zwischen- und Endlagerung soll zwar eine Abkehr vom System der handelsrechtlichen Rueckstellungen erfolgen. Allerdings sollen die Betreiber enthaftet werden - zu einem Zeitpunkt, in dem die ueber Jahrzehnte und in Jahrzehnten anfallenden Kosten nur ansatzweise bezifferbar sind.

  17. Biogas (fermentation or digester gas) plant Wittmund - experiences with the operation of an commercial sized installation. Final report; Investitionen zur Verminderung von Umweltbelastungen. Biogasanlage Wittmund - Bau und Betrieb einer Grossanlage. Abschlussbericht

    Winkelmann, M.; Schubert, S.; Kutscher, T.


    -prices for waste. Through higher environmental awareness, certificates and economical necessity in many companies waste is moreover saved. (orig.) [German] In der Biogasanlage Wittmund werden seit 1996 jaehrlich 90-100.000 t Guelle und 10-30.000 t organische Abfaelle zur Verwertung vergoren. Aus dem Biogas werden 6-8.000 MWh Strom und 5-7000 MWh Waerme produziert und verkauft. In dem Bericht werden die historischen Zusammenhaenge der Biogastechnik bezueglich des Projektes sowie die Erfahrungen der Genehmigungs-, Bau- und Inbetriebnahmephase beschrieben sowie die Betriebsergebnisse aus dem ersten Jahr. Ein besonderes Augenmerk wurde dabei auf die Zusammenarbeit mit der Landwirtschaft gelegt, die in der Art einmalig in Deutschland ist. Die Anlage arbeitet mit 70 landwirtschaftlichen Betrieben zusammen. Die Guelle wird von einem betriebseigenen Fuhrpark abgeholt und die Edelguelle zu den Betrieben zurueckgebracht. Die Logistik hierzu ist sehr komplex, die Zusammenarbeit mit den Betrieben sehr gut. Durch Veraenderungen auf dem Abfallmarkt sind die Preise fuer organische Abfaelle stark gesunken, so dass mittlerweile die Abfallmenge erhoeht wurde, desweiteren wurden in zwei Faellen sehr schlechte Erfahrungen mit Alleinversorgern dieser Anlage gemacht, so dass auch hier auf eine Eigenakquisition umgestellt wurde. Durch drastische Gesetzesaenderungen (Stromeinspeisegesetz/Bioabfall VO) konnten die Stromerloese nahezu verdoppelt werden, so dass der Einbruch auf dem Abfallmarkt wirtschaftlich etwas kompensiert werden konnte. Technisch ist die Vergaerung der Guelle in der vorliegenden Form stoerungsarm. Empfindlich ist dagegen die BHKW-Technik, bzw. die Waermeeinbindung in den Heizungskreislauf der vertraglich als Waermeabnehmer gebundenen Kaserne und die Ablufttechnik. Der Hauptproblempunkt aller Anlagen ist jedoch die Abfallakquisition. Durch einen regelrechten 'Biogasboom' werden sehr viele Klein- und Grossanlagen gebaut, die sich massiv gegenseitig die wirtschaftliche

  18. Techniques of material-flow-specific residual waste treatment; Techniken der stoffstromspezifischen Restabfallbehandlung

    Maak, D.; Collins, H.J. [Technische Univ. Braunschweig, Leichtweiss - Inst. fuer Wasserbau (Germany)


    The success achieved with large-scale plants for mechanical-biological residual waste treatment has led to a change of course in waste pretreatment. In view of the low emissions via the water and gas routes from landfilled wastes and the low costs of waste treatment some authorising authorities have meanwhile issued special licences pursuant to clause no. 2.4 of the Technical Code on Household Waste, thus enabling mechanical-biological residual waste treatment plants to continue operations beyond the year 2005. Beside offering a means of treatment and disposal, cost-effective mechanical-biological pretreatment also provides an opportunity for going over to material-flow-specific residual waste treatment. These process stages permit recirculating valuable materials and using other materials for energy production. They can be retrofitted on a modular basis in existing plants. If these advantages of the present innovative pretreatment methods are not used, then mechanical-biological pretreatment can still serve as a preparatory stage for thermal treatment. To date there has been no practical experience with this innovative method of residual waste treatment. However, industrial-scale trials have shown that each individual treatment stage is capable of being carried out successfully. [Deutsch] Die guten Erfolge im grosstechnischen Betrieb von Anlagen zur mechanisch-biologischen Restabfallbehandlung haben zu einer Kursaenderung bei der Vorbehandlung von Abfaellen gefuehrt. Geringe Emissionen der deponierten Abfaelle auf dem Gas- und Wasserpfad sowie geringe Kosten fuer die Behandlung der Abfaelle haben dazu gefuehrt, dass inzwischen bereits einige Genehmigungsbehoerden eine Ausnahmegenehmigung nach Nr. 2.4 der TA Siedlungsabfall erteilt haben und damit der Betrieb von mechanisch-biologischen Restabfallbehandlungsanlagen auch nach 2005 ermoeglicht wird. Neben der alleinigen Behandlung und Deponierung bietet die kostenguenstige Vorbehandlung mit mechanisch

  19. Permeability to brine of crushed salt rock for waste isolation, considering long-term pressure variation of overlying strata and dissolution processes. Final report; Durchlaessigkeitsverhalten von Steinsalzversatz gegenueber Laugen unter Beruecksichtigung von zeitlich veraenderlichen Ueberlagerungsdruecken und Loesungsvorgaengen. Abschlussbericht

    Froehlich, H. [Battelle Ingenieurtechnik GmbH, Eschborn (Germany); Conen, O. [Technische Univ. Darmstadt (Germany); Haefner, F.; Bruck, J. v. der [Technische Univ. Bergakademie Freiberg (Germany)


    It cannot be excluded that there will be ingress of brines to underground isolation plants for nuclear and chemical toxic wastes. The transport mechanisms in the waste repository are much determined by the perviousness of the backfilling and the sealing material used after waste emplacement in salt rock mine shafts. The critical quantity is the permeability, both for inflow of brine into the bedded waste areas, and for contaminated brine squeeze-out mechanisms. The project research work was to establish the mass transfer parameters for calculating the transport mechanisms in backfilled and sealed shafts. Using near-reality simulation of conditions, the time-dependent influence of pressure variations of overlying strata, humidity and salt/brine interactions on the permeability was examined and quantified. (orig./CB) [German] In Endlagern fuer nukleare und chemotoxische Abfaelle im Salinar kann der Zutritt von Laugen nicht prinzipiell ausgeschlossen werden. Die Transportvorgaenge innerhalb des Endlagers werden wesentlich von der Durchlaessigkeit der Versatzmaterialien und der Verschluesse bestimmt. Die bestimmende Groesse, sowohl fuer den Laugenzufluss in die Einlagerungsbereiche als auch fuer das Auspressen kontaminierter Lauge aus dem Endlager, ist dabei die Permeabilitaet. Ziel der hier vorgestellten Arbeiten war es, Stofftransportparameter fuer die Berechnung von Ausbreitungsvorgaengen in den verfuellten Bereichen eines salinaren Endlagers bereitzustellen. Unter Simulation realitaetsnaher Bedingungen wurde der Einfluss von zeitabhaengigem Ueberlagerungsdruck (Gebirgsdruck), Feuchte und die Wechselwirkung von Salz/Lauge auf das Durchlaessigkeitsverhalten untersucht und quantifiziert. (orig.)

  20. Fermentation of organic trade waste and food wastes; Vergaerung von organischen Gewerbeabfaellen und Speiseresten

    Korz, J. [Muell- und Abfalltechnik GmbH, Stuttgart (Germany)


    With reference to a technical scale fermentation plant in the rural district of Kelheim, the practical implementation of the fermentation of organic trade waste and food wastes is discussed. The described plant is in two stages; since January 1997 it has also processed food and canteen wastes as well as packaged foodstuffs. These wastes can be delivered to a separate unit with an underground storage. A second waste pulper was installed for their conditioning and hygienization. The product is fermented together with the organic waste suspension. Problems are not encountered. (orig./SR) [Deutsch] Anhand einer grosstechnischen Vergaerungsanlage im Landkreis Kelheim wurde die praktische Umsetzung erlaeutert. Die beschriebene Anlage wurde in zwei Stufen ausgebaut und verarbeitet seit Januar 1997 auch Speise- und Kuechenabfaelle sowie verpackte Lebensmittel. Fuer die Verarbeitung dieser Abfallstoffe wurde ein eigener Annahmebereich mit Tiefbunker errichtet. Fuer die Aufbereitung und Hygienisierung wurde ein zweiter Abfallpulper installiert. Die aufbereiteten Abfaelle aus dem gewerblichen Bereich werden mit der Bioabfallsuspension gemeinsam vergoren. Die Co-Vergaerung mit aufbereiteten Bioabfaellen bereitet erwartungsgemaess keine Probleme. (orig./SR)

  1. Low-cost waste incineration and recycling from the operator`s point of view; Kostenguenstige thermische Abfallverwertung und Kreislaufwirtschaftsgesetz aus Betreibersicht

    Burgorf, J. [Saarberg-Oekotechnic GmbH, Saarbruecken (Germany)


    The 1996 Act on Recycling and Waste Management specified that waste production should be reduced first of all, and that waste still produced should be recycled or used for power generation. Dumping and `classic` incineration are permissible only if it is the more acceptable solution from an environmental point of view. There are two categories of thermal treatment: Thermal treatment of `waste for dumping`, and use of the energy content of `waste for utilisation`. The contribution analyzes the effects of the law on future waste management concepts in consideration of the current situation of thermal treatment of residual waste. (orig.) [Deutsch] Das im Oktober 1996 in Kraft getretene Kreislaufwirtschafts- und Abfallgesetz (KrW-/AbfG) schreibt in den Grundsaetzen der Kreislaufwirtschaft fest, dass Abfaelle in erster Linie zu vermeiden und in zweiter Linie stofflich oder energetisch zu verwerten sind. Die Beseitigung von Abfaellen - und darunter faellt auch die `klassische` Muellverbrennung - ist nur dann zugelassen, wenn sie gegenueber der Verwertung die umweltvertraeglichere Loesung darstellt. Fuer die thermische Behandlung von Abfaellen denfiniert das KrW-/AbfG deshalb zwei Wege mit unterschiedlichen Ansaetzen: Zum einen die thermische Behandlung von `Abfaellen zur Beseitigung`, wie sie bisher in vielen Anlagen zur Muellverbrennung realisiert worden ist und zum anderen die energetische Nutzung von `Abfaellen zur Verwertung`. Der vorliegende Beitrag soll die Auswirkung dieser Vorgabe auf zukuenftige Abfallwirtschaftskonzepte unter Beruecksichtigung der derzeitigen Situation der thermischen Restabfallbehandlung darstellen. (orig.)

  2. Process-related aspects to the co-combustion of wastes in rotary kilns; Verfahrenstechnische Gesichtspunkte zur Mitverbrennung von Abfaellen in Drehrohroefen

    Endres, G. [Pillard Feuerungen GmbH, Taunusstein (Germany)


    Apart from large quantities of energy, the cement industry also depends for the manufacture of its product on certain raw materials such as limestone, marl, alum earth etc. which are typically produced by open pit mining. As a consequence, cement works in the course of time become surrounded with holes of different depth in the Earth`s surface which are later used for the disposal of household waste. Interestingly, the chemical composition of this household waste is not substantially different from that of the raw materials initially extracted from the Earth for the purpose of cement manufacture. Moreover, in contravention of medium-term trends in legislation on surface landfilling this dumped waste contains chemically bound energy. What could be more obvious, therefore, than to consider using household waste as a raw material and energy source for cement burning? [Deutsch] Die Zementindustrie benoetigt zur Herstellung ihres verkaufsfaehigen Produkts neben grossen Mengen von thermischer Energie insbesondere Rohstoffe wie Kalkstein, Mergel, Tonerde usw., die typischerweise im Tagebau gewonnen werden, es entstehen in der Nachbarschaft von Zementwerken also mehr oder weniger tiefe Loecher in der Erdoberflaeche, die in vielen Faellen bereits wieder zur Deponierung von Siedlungsabfaellen genutzt werden. Diese Siedlungsabfaelle unterscheiden sich in der chemischen Zusammenarbeit ihrer Asche interessanterweise nicht sehr von den Rohstoffen, die fuer die Zementproduktion aus der Erde gegraben werden, desweiteren enthalten sie chemisch gebundene Waermeenergie, was gemaess der mittelfristigen Gesetzeslage einer oberirdischen Deponierung eigentlich entgegensteht. Was liegt also naeher, als ueber eine Nutzung dieser Abfaelle als Rohstoff und Energietraeger im Zementbrennprozess nachzudenken? (orig.)

  3. Nuclear waste - where to go?; Atommuell - wohin?

    Dornsiepen, Ulrich


    The question of the final di9sposal of nuclear waste is a problem of international importance. The solution of the problem is of increasing urgency; the discussion is controversial and implies a lot of emotions. In Germany there is consensus that the nuclear wastes have to be disposed within the country in deep geological formations. This kind of final disposal is predominantly a geological problem and has to be solved from the geological point of view. The geologist Ulrich Dornsiepen presents the problems of the final disposal in an objective way without ideology and generally understandable. Such a presentation is necessary since the public information and participation is demanded but the open geological questions and their scientific solutions are never explained for the public. [German] Die Frage der endgueltigen Lagerung von Atommuell ist ein Problem von nationaler Tragweite, dessen Loesung immer dringender wird, bisher aber sehr kontrovers diskutiert wird und mit vielen Emotionen verknuepft ist. Es besteht in Deutschland ein Konsens, diese Abfaelle innerhalb der Landesgrenzen dauerhaft in tief liegenden Gesteinsschichten abzulagern. Diese Art der Endlagerung ist aber in erster Linie ein geologisches Problem und so auch nur von geologischer Seite her zu loesen. Daher stellt der Geologe Ulrich Dornsiepen die Problematik der Endlagerung objektiv, ideologiefrei und allgemein verstaendlich dar. Ein solches Hoerbuch ist dringend noetig, da zwar die Information und Beteiligung breiter, betroffener Bevoelkerungsteile eingefordert, aber niemals versucht wird, die offenen geologischen Fragen und ihre wissenschaftliche Loesung verstaendlich zu machen.

  4. Perspectives of thermal waste treatment concepts: Monocombustion, cocombustion, plant size, cost; Perspektiven thermischer Restabfallbehandlungskonzepte: Mono-, Co-Verbrennung, Anlagengroesse, Kosten

    Kost, T. [u und i umwelttechnik und ingenieure, Hannover (Germany)


    Public decision makers are influenced by legal regulations in their strategies on waste management. The decisions of the recent years focused on pre-treatment of waste prior to dumping in landfills and on the prohibition of dumping of untreated waste from 2005. The author does not assume that this goal will be met and assumes that about 18 million Mg/a of untreated waste will still be dumped in 2005. Other experts assume a volume of at least 10 million Mg/a. [German] Die Strategie der Restabfallentsorgung wird fuer oeffentlich-rechtliche Entscheidungstraeger wesentlich durch den rechtlichen Rahmen beeinflusst. Die vergangenen Jahre waren gepraegt durch die Diskussion um den 'richtigen' Weg der Vorbehandlung vor der Deponie und die damit im Kontext stehende Rechtsnovelle zur Oeffnung der TA Siedlungsabfall. Dabei hat der Gesetzgeber immer am Ziel festgehalten, die Ablagerung von unvorbehandelten Abfaellen bis zur Uebergangsfrist 2005 zu verbieten. Es ist zur Zeit nicht davon auszugehen, dass sich an dieser Vorgabe etwas aendert, auch nicht ueber die europaeische Gesetzgebung. Fuer eine Vielzahl von Kommunen und Entsorgungsverbaenden steht damit heute die Entscheidung fuer ein Vorbehandlungskonzept an. Betrachtet man die momentane Entsorgungssituation und prognostiziert aus Kenntnis der ausgeschriebenen und zu erwartenden Projekte die Entwicklung fuer das Jahr 2005, erscheint es wenig wahrscheinlich, dass die vom Gesetzgeber definierten Vorgaben eingehalten werden. Vorraussichtlich wird im Jahr 2005 ein Grossteil der Abfaelle, ca. 18 Mio. Mg/a, unbehandelt deponiert werden. Andere Quellen schaetzen die Behandlungsluecke fuer den Restabfall auf mindestens 10 Mio. Mg/a. (orig.)

  5. Process optimisation in waste combustion and gasification; Prozessoptimierung bei der Verbrennung und Vergasung von Abfaellen

    Born, M. [Technische Univ. Bergakademie Freiberg, Inst. IEC, Fakultaet 4 (Germany)


    Optimisation of thermal treatment processes is chiefly geared to the following aims: in terms of process engineering, to the homogenisation of input materials, improvement of process effectivity (increased reaction rates), intensification of mixing and exploitation of residence time (approximation to thermodynamic equilibria); in ecological terms, to the minimisation of material flows and pollutant generation and limitation of emissions; and in economic terms to the simplification of process techniques, maximisation of net energy production, and minimisation of the quantity and pollutant content of arising wastes. The present contribution takes a closer look at some of these ways of optimisation. [Deutsch] Die Optimierung der thermischen Behandlungsprozesse wird vor allem mit folgenden Zielstellung durchgefuehrt: - verfahrenstechnisch durch - Homogenisierung der Input-Materialien, Verbesserung der Effektivitaet der Prozesse (Erhoehung der Reaktionsgeschwindigkeit), Intensivierung der Mischung und Nutzung der Verweilzeit (Annaeherung an thermodynamische Gleichgewichte). - Oekologisch durch - Minimierung der Stoffstroeme, Minimierung der Schadstoffentstehung, Begrenzung der Emissionen. - Oekonomisch durch - Vereinfachung der Verfahrenstechnik, Maximierung der Nettoenergieproduktion, Minimierung der Mengen und Schadstoffgehalte entstehender Abfaelle. In den folgenden Ausfuehrungen sollen einige dieser Optimierungsmoeglichkeiten naeher betrachtet werden. (orig./SR)

  6. Ecologically acceptable waste treatment at Vienna. Thermal waste treatment and district heating; Oekologische Abfallbehandlung in Wien. Thermische Abfallbehandlung und Fernwaerme

    Loeffler, H.


    Waste that cannot be prevented nor recycled must be disposed of in ultimate storage sites. This requires inertialisation, detoxification or any other treatment that ensures that no pollutants are emitted into the atmosphere or groundwater. This is the goal of Vienna's waste management policy. (orig.) [German] Es muss daher grundsaetzlich gefordert werden, dass die Abfaelle, die weder vermieden noch wiederverwertet werden koennen, so endgelagert werden, dass sie fuer die Nachwelt keine Belastung darstellen, das heisst, dass sie weder zu einer Altlast werden koennen noch auf lange Zeit ueberwacht werden muessen. Diese Forderung kann aber nur dadurch verwirklicht werden, dass diese Rueckstaende sowie inertisiert und entgiftet oder so nachbehandelt werden, dass sie keine Schadstoffe an die Luft abgeben und ihre Eluate schon nach kurzer Zeit, fuer die der Abfallerzeuger noch Vorsorge zu treffen hat, ohne Ueberwachung mit Sicherheit keine Gefahr mehr fuer das Grundwasser darstellen koennen, das heisst, dass ihre Eluate im Wesentlichen die Trinkwassergrenzwerte einhalten sollten. An diesen Anforderungen soll daher die Wiener Abfallpolitik gemessen werden. (orig.)

  7. Methanization plants for household waste. Environmental evaluation of the degree of centralization; Methanisation de dechets organiques menagers. Evaluation environnementale du degre de centralisation

    Membrez, Y. [EREP SA, Aclens (France); Glauser, M. [biol conseils SA, Yverdon-les-Bains (France); Imer, J.M. [biol conseils SA, Neuchatel (Switzerland)


    The purpose of the study is to evaluate, from an environmental viewpoint, the influence of the centralization of the methanization installations which are needed to eliminate the organic waste produced by the population of a given region. Four scenarious of methanization organization are studied for the canton of Vaud, Switzerland (pop. 600 000) in the domains of waste collection, transport, treatment and use for agriculture. The method used is the `ecopoint method`, where `ecofactors` are established, which take into account the current impact of the environment, and the critical value of this impact that would cause environmental perturbation. The main results show that in the methanization of organic household waste, the dominant impact is that of air pollution (NO{sub x} emission). (orig.) [Deutsch] Mit dieser Studie soll der Einfluss der Zentralisierung von Methanisierungsanlagen, welche zur Entsorgung der von der Bevoelkerung einer gegebenen Region produzierten organischen Abfaelle benoetigt werden, von umweltschuetzerischen Gesichtspunkten aus beurteilt werden. Fuer die Organisation der Methanisierungsanlagen im Kanton Waadt, Schweiz (Bevoelkerungszahl 600 000), wurden vier Szenarien untersucht, welche die Bereiche Abfallsammlung, Transport, Verarbeitung und Verwendung in der Landwirtschaft umfassten. Die angewendete Methode ist die `Umweltbelastungspunkte-Methode`, worin `Oekofaktoren` eingefuehrt werden, welche die aktuelle Belastung der Umwelt sowie den kritischen Wert dieser Belastung, bei dessen Erreichung mit Umweltschaeden zu rechnen ist, beruecksichtigen. Die wichtigsten Ergebnisse zeigen, dass bei der Methanisierung von organischen Haushaltsabfaellen die Luftverschmutzung (NO{sub x}-Emission) unter den Umweltbelastungen am meisten ins Gewicht faellt. (orig.)

  8. Possibilities under the `Kreislaufwirtschaft- und Abfallgesetz` for the recycling or for energy generation from waste with a high calorific value having undergone mechanical-biological conditioning; Moeglichkeiten der energetischen und stofflichen Verwertung von heizwertreichen Reststoffen aus der mechanisch-biologischen Restabfallbehandlung im Rahmen des Kreislaufwirtschafts- und Abfallgesetzes

    Franke, J.; Fricke, K. [Ingenieurgemeinschaft Witzenhausen Fricke und Turk GmbH, Witzenhausen (Germany)


    This (partial) project has the following aims: to describe comprehensively the possibilities for the recycling, or generation of energy from, waste with a high calorific value having undergone mechanical-biological conditioning; further, to formulate demands regarding the quality of the separated partial fractions. This basic study takes all relevant, commercial thermal processes into account (power plants, cement works, blast furnaces, etc.). Furthermore, the question is investigated of whether the thermal waste processing plants in the area of the Suedhessische Arbeitsgemeinschaft Abfall (SAGA) are suitable for waste utilization. An environmental compatibility statement is made, and the economic and legal boundary conditions are studied. (orig.) [Deutsch] Ziel des (Teil-)Forschungsvorhabens soll es sein, die Moeglichkeiten der energetischen und stofflichen Verwertung heizwertreicher Abfaelle aus der mechanisch-biologischen Restabfallbehandlung umfassend darzustellen und die Anforderungen an die Qualitaet der abgretrennten Teilfraktionen zu formulieren. Bei der Grundlagenermittlung sollen alle relevanten auf dem Markt angebotenen thermischen Verfahren (Kraftwerke, Zementwerke, Hochoefen usw.) mit einbezogen werden. Weiterhin sollen die im SAGA-Gebiet (Suedhessische Arbeitsgemeinschaft Abfall) vorhandenen thermsichen Anlagen auf ihre Eignung zur energetischen bzw. stofflichen Verwertung hin ueberprueft werden. Neben der Bewertung der Umweltvertraeglichkeit werden die oekonomischen und rechtlichen Rahmenbedingungen untersucht. (orig.)

  9. State of the art of waste utilization in underground mining; Stand der Abfallverwertung im Bergbau unter Tage

    Liese, F. (comp.)


    The practice of filling depleted mines to protect humans, the environment and the mining site itself has a long tradition in European mining. Its continuation in all branches of mining, using suitable wastes, therefore only appears sensible, especially in consideration of the Recycling Economy Law. In Germany activities to develop the scientific knowledge, modern technology and technical rules required for proper mine filling with wastes have been going on for fifteen years. It would be sad if this were not taken into account in the current political and legal decision making process and if premature decisions were made out of respect for past political declarations of intent. [German] Das Einbringen von Versatz zum Schutz von Menschen, Umwelt und Lagerstaette hat im Europaeischen Bergbau eine lange Tradition. Insbesondere im Sinne der Kreislaufwirtschaft ist es daher nur konsequent, geeignete Abfaelle in allen Bergbauzweigen dazu gezielt zu verwerten. Die fuer eine geordnete Versatzwirtschaft mit Abfaellen erforderlichen wissenschaftlichen Erkenntnisse, modernen Techniken und technischen Regeln wurden in Deutschland in den letzten 15 Jahren geschaffen. Es waere bedauerlich, wenn dies beim politischen und juristischen Abwaegungsprozess nicht angemessen beruecksichtigt wuerde und vor dem Hintergrund politischer Absichtserklaerungen vorschnelle Entscheidungen gefaellt wuerden. (orig.)

  10. Use of residual fuels and biowaste of low calorific value for syngas production by the Noell conversion process; Der Einsatz niederkaloriger Energietraeger aus Reststoffen und Bioabfaellen zur Synthesegaserzeugung nach dem Noell-Konversionsverfahren

    Schingnitz, M.; Goehler, P. [Noell-KRC Energie- und Umwelttechnik GmbH, Freiberg (Germany)


    By gasification with oxygen, municipal waste can be converted into a pure, burnable gas. The gas can be used like natural gas, e.g. in boilers and industrial furnaces, gas engines and gas turbines for heat and electric power generation, but also in chemical synthesis processes, e.g. methanol synthesis. If the right gasification technology is selected, the mineral constitutents of the waste materials can be melted down at the same time, e.g. into a granulate with a glass-like structure that can be used as constructional material. (orig) [Deutsch] Durch Vergasung mit Sauerstoff lassen sich kommunale Abfaelle in ein brennbares Gas umwandeln. Dieses Gas kann mit einfachen und bewaehrten verfahren von Schadstoffen wie Schwefelverbindungen befreit werden. Es laesst sich wie sauberes Erdgas umweltfreundlich in Kesseln und Industrieoefen einsetzen, in Gasmotoren oder Gasturbinen zur Erzeugung von Elektroenergie und Heizwaerme nutzen, aber auch zu chemischen Synthesen, beispielsweise von Methanol, verwenden. Bei geeigneter Wahl der Vergasungstechnologie gelingt es ausserdem, die mineralischen Bestandteile der Abfallstoffe prozessintern aufzuschmelzen und in ein beispielsweise als Baustoff verwertbares Schmelzgranulat mit glasartiger Struktur zu ueberfuehren. (orig)

  11. Biogas (fermentation or digester gas) plant Wittmund - experiences with the operation of an commercial sized installation. Final report; Investitionen zur Verminderung von Umweltbelastungen. Biogasanlage Wittmund - Bau und Betrieb einer Grossanlage. Abschlussbericht

    Winkelmann, M.; Schubert, S.; Kutscher, T.


    -prices for waste. Through higher environmental awareness, certificates and economical necessity in many companies waste is moreover saved. (orig.) [German] In der Biogasanlage Wittmund werden seit 1996 jaehrlich 90-100.000 t Guelle und 10-30.000 t organische Abfaelle zur Verwertung vergoren. Aus dem Biogas werden 6-8.000 MWh Strom und 5-7000 MWh Waerme produziert und verkauft. In dem Bericht werden die historischen Zusammenhaenge der Biogastechnik bezueglich des Projektes sowie die Erfahrungen der Genehmigungs-, Bau- und Inbetriebnahmephase beschrieben sowie die Betriebsergebnisse aus dem ersten Jahr. Ein besonderes Augenmerk wurde dabei auf die Zusammenarbeit mit der Landwirtschaft gelegt, die in der Art einmalig in Deutschland ist. Die Anlage arbeitet mit 70 landwirtschaftlichen Betrieben zusammen. Die Guelle wird von einem betriebseigenen Fuhrpark abgeholt und die Edelguelle zu den Betrieben zurueckgebracht. Die Logistik hierzu ist sehr komplex, die Zusammenarbeit mit den Betrieben sehr gut. Durch Veraenderungen auf dem Abfallmarkt sind die Preise fuer organische Abfaelle stark gesunken, so dass mittlerweile die Abfallmenge erhoeht wurde, desweiteren wurden in zwei Faellen sehr schlechte Erfahrungen mit Alleinversorgern dieser Anlage gemacht, so dass auch hier auf eine Eigenakquisition umgestellt wurde. Durch drastische Gesetzesaenderungen (Stromeinspeisegesetz/Bioabfall VO) konnten die Stromerloese nahezu verdoppelt werden, so dass der Einbruch auf dem Abfallmarkt wirtschaftlich etwas kompensiert werden konnte. Technisch ist die Vergaerung der Guelle in der vorliegenden Form stoerungsarm. Empfindlich ist dagegen die BHKW-Technik, bzw. die Waermeeinbindung in den Heizungskreislauf der vertraglich als Waermeabnehmer gebundenen Kaserne und die Ablufttechnik. Der Hauptproblempunkt aller Anlagen ist jedoch die Abfallakquisition. Durch einen regelrechten 'Biogasboom' werden sehr viele Klein- und Grossanlagen gebaut, die sich massiv gegenseitig die wirtschaftliche

  12. Analysis of conservativity analysis for clearance levels. Final report; Konservativitaetsanalysen bei Freigabegrenzwerten. Schlussbericht

    Deckert, A.; Thierfeldt, S.


    , raising the clearance levels would not lead to an increase of the material quantities because other nuclides of the respective nuclide vectors are limiting. In conclusion, the effort to alter the clearance levels of the 1995 SSK recommendation for conventional disposal does not seem worthwhile. (orig.) [Deutsch] Bei der Herleitung von Freigabewerten fuer Reststoffe/Abfaelle werden grundsaetzlich radiologisch notwendige Konservativitaeten einbezogen. Diese koennen fuer verschiedene Saetze von Freigabewerten allerdings stark differieren, was zu Inkompatibilitaeten zwischen Freigabepfaden fuehrt. Ziel ist daher der Vergleich der Konservativitaetsniveaus verschiedener Wertesaetze, wozu Konservativitaeten fuer Freigabewerte fuer Abfaelle zur Deponierung und fuer metallische Reststoffe analysiert werden. Es wurden Methoden erarbeitet, um den Grad an Konservativitaet quantitativ zu erfassen. Die Situation bei der Freigabe zur konventionellen Deponierung wurde analysiert, indem die aktuelle und zukuenftige Situation des Abfallaufkommens hinsichtlich Massen, Nuklidvektoren, geographischer Verteilung und Deponierung probabilistisch modelliert und die resultierende Dosisverteilung berechnet wurden. Als Freigabekriterium wurden die Grenzwerte fuer die Freigabe zur konventionellen Deponierung gemaess des SSK-Empfehlungsentwurfs von 1995 angesetzt. Auf der Basis realistischer Szenarien fuer die Exposition des Deponiepersonals und bei Zugrundelegung der Grenzwerte des SSK-Empfehlungsentwurfs wurde eine Dosisverteilung ermittelt, die zeigt, dass der Bereich des radiologischen Schutzziels im Bereich von 10 {mu}Sv/a nicht verlassen wird, auch wenn groessere Massen als 100 Mg/a freigegebenen Materials deponiert werden. Eine Beschraenkung der jaehrlich freigegebenen Masse oder Aktivitaet ist daher nicht erforderlich. Die Freigabewerte, die durch die Belastungspfade externe Bestrahlung und Inhalation bei Deponierpersonal bestimmt werden, weisen ein aehnliches Mass an Konservativitaet auf wie

  13. Ecologically acceptable manufacture of rechargeable nickel-hydride-button-cells and lithium-primary-button-cells as an alternative to nickel-cadmium-button-cells, mercury-button-cells and other mercury based alkaline-primary-button-cells. Final report; Investitionen zur Verminderung von Umweltbelastungen. Umweltschonende Herstellung von wiederaufladbaren Nickel-Metall-Hydrid-Knopfzellen und Lithium-Primaer-Knopfzellen zur Substitution von Nickel-Cadmium-Knopfzellen, Quecksilberoxid-Knopfzellen und anderen quecksilberhaltigen alkalischen Primaer-Knopfzellen. Abschlussbericht

    Fahlbusch, E.


    Resulting from the transfer of the button cell production from Singapore to Ellwangen, it has been possible to develop two completely new button cell production technologies for integration in the Ellwangen plant. The first innovation pertains to the production of rechargeable nickel-bydride-button-cells (NiMH) which replaces entirely the former nickel-cadmium-button-cell production, reducing the cadmium requirements by approximately 86 tons per year and avoiding a further 39 tons of cadmium polluted waste. Secondly, an innovative method for the production of lithium-primary-button-cells (LiP) was developed. LiP-button-cells and zinc/air-button-cells replace the former mercury-button-cell production completely and saving a further 10 tons of mercury yearly. (orig.) [German] Im Rahmen der Verlagerung der Knopfzellenproduktion von Singapur nach Ellwangen wurden zwei neue, innovative Fertigungsbereiche zur Herstellung von Knopfzellen am Produktionsstandort Ellwangen realisiert. Zum einen handelt es sich um die Produktion von wiederaufladbaren Nickel-Metallhybrid-Knopfzellen (NiMH-Knopfzellen). Durch diese NiMH-Knopfzellen werden die bisher produzierten Nickel-Cadmium-Knopfzellen vollstaendig substituiert. Hierdurch wird der Cadmiumanteil im Produkt um ca. 86 Tonnen pro Jahr reduziert. In der Produktion werden zusaetzlich 39 Tonnen cadmiumhaltige Abfaelle vermieden. Als zweiter neuer Fertigungsbereich wurde die Herstellung von Lithium-Primaer-Knopfzellen (LiP-Knopfzellen) realisiert. LiP-Knopfzellen und Zink-Luft-Knopfzellen ersetzen zu 100% die bisher produzierten Quecksilberoxid-Knopfzellen. Die pro Jahr verarbeitete Quecksilbermenge von ungefaehr 10 Tonnen kann somit zukuenftig entfallen. (orig.)

  14. Experimental investigation and mathematical modelling of the combustion of brown coal, refuse and mixed fuels in a circulating fluidized bed combustor; Experimentelle Untersuchung und mathematische Modellierung der Verbrennung von Braunkohle, Abfallstoffen und Mischbrennstoffen in einer zirkulierenden Wirbelschichtfeuerung

    Bernstein, W.; Brunne, T.; Hiller, A. [Technische Univ. Dresden (Germany). Inst. fuer Energietechnik; Albrecht, J. [Lurgi Umwelt GmbH, Frankfurt am Main (Germany); Quang, N. [Polytechnic Inst., Danang (Viet Nam)


    Extensive experiments on combustion of biological materials and residues in fluidized bed combustors and dust combustors have been carried out at the Department of Power Plant Engineering of Dresden University since the early nineties. Particular interest was taken in mixing brown coal with sewage sludge, sugar pulp and waste wood. The experiments were supplemented by modelling in a research project funded jointly by the BMBF and Messrs. Lurgi since early 1997. A combustion cell model designed by Siegen University is being modified for the new mixed fuels, and preliminary investigations were carried out on a batch reactor while the modelling work was continued. (orig.) [Deutsch] An dem Lehrstuhl fuer Kraftwerkstechnik der TU Dresden werden seit Anfang der 90-iger Jahre umfangreiche experimentelle Untersuchungen zur Verbrennung von Bio- und Reststoffen in Wirbelschicht- und Staubfeuerungen durchgefuehrt. Dabei war vor allem die Zufeuerung dieser Stoffe in Waermeerzeugeranlagen auf Braunkohlenbasis von besonderem Interesse. Experimentell konnte nachgewiesen werden, dass sowohl Biobrennstoffe als auch Abfaelle in zirkulierenden Wirbelschichtfeuerungen umweltschonend zur Waermeerzeugung eingesetzt werden koennen. Als Beispiel wird das an Hand von Braunkohle-Klaerschlammgemischen sowie Bagasse- und Holz-Braunkohlegemischen gezeigt. Neben den experimentellen Untersuchungen bietet die Modellierung der Verbrennungsvorgaenge ein geeignetes Mittel um Voraussagen zu anderen Mischungsanteilen sowie anderen geometrischen Abmessungen machen zu koennen. Seit Anfang 1997 wird dazu ein vom BMBF und der Firma Lurgi gefoerdertes Forschungsvorhaben bearbeitet. Ein von der Universitaet Gesamthochschule Siegen fuer die Braunkohleverbrennung konzipiertes Zellenmodell wird auf die neuen Brennstoffgemische erweitert. Da grundsaetzlich andere Stoffzusammensetzungen vorliegen, wurden an einem Batch-Reaktor Voruntersuchungen zum Pyrolyseverhalten der Brennstoffe durchgefuehrt. Erste

  15. Mechanical/thermal dehydration - a new process for treatment of peat and coal; Mechanisch/Thermische Entwaesserung - ein neues Verfahren zur Veredelung von Torf und Kohlen

    Bergins, C.; Berger, S.; Strauss, K. [Dortmund Univ. (Germany); Elsen, R.O. [RWE Energie, Essen (Germany); Erken, M. [Rheinbraun AG, Koeln (Germany); Bielfeldt, F.B. [Dieffenbacher, Eppingen (Germany)


    In order to keep German brown coal competitive, new technologies for enhanced efficiency of power generation from brown coal were developed in the past few years. At a water content of 50-60 percent by weight, much energy is lost for evaporation. Reduction of the water content will incur a 5 percent effiency enhancement. A new process was developed at Dortmund university, i.e. mechanical/thermal dehydration in which the water contained in brown coal is removed by heat and mechanical pressure. The process is described, and its applicability for other moist fuels, e.g. peat or waste from the paper and wood processing industry ist discussed. (orig./SR) [Deutsch] Damit Braunkohle in Deutschland als heimischer und subventionsfreier Energietraeger diesen Stellenwert behaupten und in Zukunft weiter ausbauen kann, wurde in den letzten Jahren verstaerkt die Entwicklung neuer Technologien zur Effizienzsteigerung der Braunkohleverstromung vorangetrieben. Bei der Verbrennung von Braunkohlen mit Wassergehalten von 50-60 Gew.-% ist in herkoemmlichen Kraftwerken ein erheblicher Teil des Energieinhaltes zur Verdampfung des Wassers mit Hilfe von heissen Rauchgasen in sogenannten Mahltrockungsanlagen erforderlich. Durch eine energetisch guenstige Reduzierung des Wassergehaltes vor der Verbrennung sind hier Wirkungsgradsteigerungen um bis zu 5 Prozentpunkte moeglich. Ein neues, fuer diese Aufgabenstellung einsetzbares Verfahren ist das am Lehrstuhl Energieprozesstechnik und Stroemungsmechanik der Universitaet Dortmund entwickelte Mechanisch/Thermische Entwaesserungsverfahren (MTE-Verfahren). Durch die kombinierte Anwendung von Waerme und mechanischem Druck laesst sich das in der Kohle enthaltene Wasser in fluessiger Form entfernen. Neben der Darstellung des MTE-Verfahrens am Beispiel von Braunkohle soll im folgenden auch auf die Moeglichkeiten der Anwendung des Verfahrens fuer andere feuchte Brennstoffe wie Torf und Abfaelle aus der Papier- und Holzverarbeitung eingegangen werden

  16. Thermodynamic aspects of heavy metal volatility during utilisation of the energetic and material fraction of waste materials; Schwermetallfluechtigkeit bei der energetischen und stofflichen Verwertung von Abfaellen aus der Sicht der Thermodynamik

    Meyer, B.; Starke, A. [TU Bergakademie Freiberg (Germany). Inst. IEC


    Co-combustion plants, in which fuel is partly substituted by waste materials, are subject to the 17th BImSchV (Nuisance Control Ordinance) provided that the thermal fraction of 25% is not exceeded. Emission limits are calculated proportionately on the basis of limiting values for emissions from coal power stations (13th BImSchV) and waste incinerators (17th BImSchV). Compared to coal, waste has higher concentrations of heavy metals and halogens, which results in enhanced emissions of heavy metal compounds and chlorides with the flue gas and gasification gas. Plant operators intending to opt for co-combustion must check if the existing flue gas purification system is efficient enough to meet the specifications of the 17th BImSchV. In general, thermodynamic modelling is the most common method of evaluation and optimisation for high-temperature processes of this kind. (orig./SR) [Deutsch] Da bei der Mitverbrennung ein Teil des Brennstoffes durch den Reststoff substituiert wird, unterliegen diese Anlagen der Anteilsregelung nach 17. BImSchV, sofern ein thermischer Anteil von 25% nicht ueberschritten wird. Emissionsgrenzwerte werden anteilig aus den z.B. fuer Kohlekraftwerke gueltigen Grenzwerten nach TA Luft oder 13. BImSchV und denen fuer Abfaelle nach 17 BImSchV ermittelt. Der hier betrachtete Reststoff Muell beinhaltet im Vergleich zur Kohle hohe Konzentrationen an Schwermetallen und Halogenen. Dies laesst eine erhoehte Emission von Schwermetallverbindungen und Chloriden mit dem Rauchgas bzw. Vergasungsgas erwarten. Es muss in jedem Fall ueberprueft werden, ob die vorhandene Rauchgasreinigung ausreicht, wenn bei der Mitverbrennung/-vergasung die Emissionsgrenzwerte der 17. BImSchV zur Anwendung kommen. Als Bewertungs- und Optimierungsmethode fuer derartige Hochtemperaturprozesse setzt sich die thermodynamische Modellierung zunehmend durch. (orig./SR)

  17. 17. Dialogue on waste management MV. Current developments in waste and resources economics. Proceedings; 17. DIALOG Abfallwirtschaft MV. Aktuelle Entwicklungen in der Abfall- und Ressourcenwirtschaft. Tagungsband

    Nelles, Michael (ed.)


    This proceedings of 17th DIALOG Waste Management Mecklenburg-Western Pomerania contains 13 lectures. The topics were: Phosphorus recycling of wastewater and sewage sludge (Robert Ristow); Current waste legislation developments (Wolfgang Siederer); Further development of the recycling industry (Andreas Bruckschen); Resource-efficient recycling business - a challenge for municipalities (Holger Thaerichen); Brick Recycling (Anette Mueller); Who has the buck? competence and responsibility in collection, transportation and recycling of waste electrical equipment (Hans-Bernhard Rhein); Recovery of biogenic waste - Development, status and prospects (Martin Kranert); Experience in the bio-waste collection in the district of Western Pomerania-Ruegen (Torsten Ewert); Biowaste concept of OVVD GmbH (Stephan Schuett); Quo vadis BAWA Schwerinum? Biowaste treatment facility Schwerin - first operation experience (Andreas Lange); Future marketing opportunities for compost (Anke Boisch); Status and prospects of waste and substance flow management (Michael Nelles); Development of separate collection of biowaste quantities in Mecklenburg-Western Pomerania. [German] Dieser Tagungsband von der 17. DIALOG Abfallwirtschaft Mecklenburg-Vorpommern in Rostock enthaelt 13 Vortraege. Die Themen waren: Phosphor-Recycling aus Abwasser und Klaerschlamm (Robert Ristow); Aktuelle abfallrechtliche Entwicklungen (Wolfgang Siederer); Weiterentwicklung der Recyclingwirtschaft (Andreas Bruckschen); Ressourceneffiziente Wertstoffwirtschaft ? eine Herausforderung fuer die Kommunen (Holger Thaerichen); Ziegelrecycling (Anette Mueller et. al.); Wer hat den schwarzen Peter? Zustaendigkeiten und Verantwortlichkeiten bei Sammlung, Transport und Verwertung von Elektroaltgeraeten (Hans-Bernhard Rhein); Verwertung biogener Abfaelle - Entwicklung, Stand und Perspektiven (Martin Kranert); Erfahrungen bei der Bioabfallerfassung im Landkreis Vorpommern-Ruegen (Torsten Ewert); Bioabfallkonzept der OVVD GmbH (Stephan

  18. Waste decomposition and off-gas emissions of dry, single-stage anaerobic digestion processes followed by a composting stage: The example of the KOMPOGAS process; Abbauleistung und Abluftemissionen bei trockenen, einstufigen Vergaerungsverfahren mit nachgeschalteter Rotte am Beispiel des KOMPOGAS-Verfahrens

    Fricke, K. [Technische Univ. Braunschweig (Germany). Leichtweiss-Institut fuer Wasserbau; Leisner, R. [KOGAS AG, Uzwil (Switzerland); Wallmann, R. [Ingenieurgemeinschaft Witzenhausen, Fricke und Turk GmbH, Witzenhausen (Germany)


    The working group IGW/LWI (Ingenieurgemeinschaft Witzenhausen Fricke and Turk GmbH and Leichtweiss Institute of TU Brunswick University) carried out scientific and technical investigations of anaerobic digestion and subsequent composting at the mechanical-biological waste treatment plant at Kufstein/Tyrol on behalf of KOGAS GmbH. The investigations started in May 2000; they were to provide information for analysis and optimisation of the process and products with a view to the minimisation of residues for dumping or incineration. The following subjects were investigated: Mass balance; decomposition rate; gas yields and gas quality; quality of residues for dumping (biological stability and calorific value); off-gas emissions; process control. Performance data of the plant will provide a basis for further planning and will be interpreted against the background of current legal boundary conditions. [German] Die Arbeitsgemeinschaft IGW/LWI (Ingenieurgemeinschaft Witzenhausen Fricke and Turk GmbH und Leichtweiss-Institut der TU Braunschweig) wurde im Mai 2000 von der KOGAS GmbH beauftragt, die wissenschaftlich-technische Begleitung eines Versuches zur Vergaerung und Nachrotte von Restmuell auf dem Gelaende der MBA Kufstein/Tirol durchzufuehren. Ziel der Untersuchung war die Ueberpruefung und Optimierung des Vergaerungs- und Nachrotteprozesses sowie der Materialaufbereitung und Konfektionierung im Hinblick auf die Minimierung von Stofffluessen in die energetische Verwertung bzw. thermische Behandlung. Im Rahmen des Vorhabens wurden folgende Thermokomplexe bearbeitet: - Massenbilanz, - Abbauleistung, - Gasertrag und Gasqualitaet, - Qualitaet der zu deponierenden Abfaelle (biologische Stabilitaet und Heizwert), - Abluftemissionen, - Prozesssteuerung. Leistungsdaten der Verfahren sollten als Planungsgrundlagen bereitgestellt und vor dem Hintergrund der aktuellen rechtlichen Rahmenbedingungen bewertet werden. (orig.)

  19. Operating experience in the gasification of municipal waste and other waste at the `secondary feedstocks recycling centre` (SVZ) Schwarze Pumpe; Betriebserfahrungen zur Vergasung von Hausmuell und anderen Abfaellen im Sekundaerrohstoffverwertungszentrum Schwarze Pumpe (SVZ)

    Buttker, B. [Sekundaerrohstoffverwertungszentrum Schwarze Pumpe GmbH, Schwarze Pumpe (Germany)


    fester Abfaelle mit Kohle bei schrittweiser Erhoehung des Abfallanteiles in der FDV realisiert. (orig.)

  20. The Chernobyl accident: Can lichens be used to characterize a radiocesium contaminated range?

    Eldar Gaare


    Full Text Available Many of the lichen species that are important in the lichen dominated plant communities in the Norwegian mountains are important reindeer winter forage. They are also organisms that collect fall-out from the atmosphere. The Chernobyl accident brought, among other, radioactive Cesium, and from lichens this follow the food chain to reindeer and finally man. From region to region this fall-out was unevenly distributed and methods are needed to compare winter ranges and to monitor the developement of radioactive levels in the lichen carpet. Cornicularia divergens, Alectoria ochroleuca, Cetraria nivalis, Cladina mitis, C. stellaris and Stereocaulon pa¬schale was collected in the Dovre mountains to compare species levels and to study collection methods. We found that from spot to spot there is a very large variation between samples, even within the same species. Because of this we are not able to show significant species differences. We found, however, that species from more or less snow free ridgetops, Cornicularia divergens, Alectoria ochroleuca, Cetraria nivalis and Cladina mitis showed less variation and thus must be recommended as the best species for monitoring and comparison of ranges.Tsjernobyl-ulykken: Kan lav nyttes til karakterisering av et radioaktivt forurenset reinbeite?Abstract in Norwegian / Sammendrag: Mange av de lavarter som er viktige i lavdominerte plantesamfunn i de norske fjell er viktige som vinterfor for rein. Disse organismer samler også nedfall fra atmosfæren. Ulykken i Tsjernobyl brakte, blant annet, radioaktivt cesium, og fra lav følger dette næringskjeden til rein og endelig mennesket. Fra område til område var dette nedfallet ujevnt fordelt, og det kreves metoder for å sammenligne vinterområder og for å overvåke utviklingen av det radioaktive nivå i lavmattene. Cornicularia divergens, Alectoria ochroleuca, Cetraria nivalis, Cladina mitis, C. stellaris og Stereocaulon paschale ble samlet på Dovrefjell for

  1. Geochemical investigations into the retention of reactive carbon compounds for toxic heavy metals. Final report; Geochemische Untersuchungen zur Retention von reaktiven Kohlenstoffverbindungen fuer toxische Schwermetalle. Abschlussbericht

    Kupsch, H.; Mansel, A.; Crustewitz, C.


    voraus. Durch den Einsatz radiochemischer Analysenmethoden, die im Rahmen der Projektbearbeitung weiter entwickelt wurden, wird es moeglich, diese Untersuchungen im Ultraspurenbereich durchzufuehren. Durch eine radioaktive Doppelmarkierung der NOM-Spezies sollte der molekulare Bezug zu den geochemsichen Rueckhaltebarrieren bezueglich der Depositebildung erbracht werden. Die Radiomarkierung identifizierter reaktiver Kohlenstoffverbindungen, z.B. mit {sup 131}I einerseits und der Einsatz radioaktiver Isotope der Schwermetalle ({sup 64}Cu, {sup 203}Pb, {sup 197}Hg) andererseits, laesst Speziationsuntersuchungen in den binaeren Systemen (Schwermetall + Geomatrix, Schwermetall + reaktive Kohlenstoffverbindungen, reaktive Kohlenstoffverbindungen + Geomatrix) und besonders im ternaeren System (Schwermetall + Geomatrix + reaktive Kohlenstoffverbindungen) unter definierten Bedingungen zu. Die speziellen Markierungsmethoden waren Voraussetzung fuer Verteilungsmessungen im naturnahen, niedrigen Konzentrationsbereich. (orig.)

  2. Environmental policy. Ambient radioactivity levels and radiation doses in 1996; Umweltpolitik. Umweltradioaktivitaet und Strahlenbelastung im Jahr 1996



    The report is intended as information for the German Bundestag and Bundesrat as well as for the general population interested in issues of radiological protection. The information presented in the report shows that in 1996, the radiation dose to the population was low and amounted to an average of 4 millisievert (mSv), with 60% contributed by natural radiation sources, and 40% by artificial sources. The major natural source was the radioactive gas radon in buildings. Anthropogenic radiation exposure almost exclusively resulted from application of radioactive substances and ionizing radiation in the medical field, for diagnostic purposes. There still is a potential for reducing radiation doses due to these applications. In the reporting year, there were 340 000 persons occupationally exposed to ionizing radiation. Only 15% of these received a dose different from zero, the average dose was 1.8 mSv. The data show that the anthropogenic radiation exposure emanating from the uses of atomic energy or applications of ionizing radiation in technology is very low. (orig./CB) [Deutsch] Der vorliegende Bericht ueber die `Umweltradioaktivitaet und Strahlenbelastung im Jahr 1996` richtet sich an Bundestag und Bundesrat und darueber hinaus an alle an Fragen des Strahlenschutzes interessierte Buerger. Der Bericht belegt, dass die Strahlenbelastung der Bevoelkerung im Jahr 1996 gering war und insgesamt durchschnittlich 4 Millisievert (mSv) betrug. Dieser Wert war zu 60% auf natuerliche und zu 40% auf kuenstliche Strahlenquellen zurueckzufuehren. Den wesentlichen Beitrag zur natuerlichen Strahlenbelastung lieferte das radioaktive Gas Radon in Wohnungen. Die zivilisatorische Strahlenexposition der Bevoelkerung wurde fast ausschliesslich durch die Anwendung radioaktiver Stoffe und ionisierender Strahlen in der Medizin im Rahmen der Diagnostik hervorgerufen. Hier bestehen nach wie vor Moeglichkeiten zur Reduktion der Strahlenbelastung. Im Jahre 1996 waren 340 000 Personen beruflich

  3. 19. network conference: Substitute fuels - from waste material to product. Proceedings; 19. Netzwerktreffen: Ersatzbrennstoffe - vom Abfall zum Produkt. Konferenzband



    Substitute fuels are in great demand, both from the view of waste management and as substitutes for increasingly expensive fuels. According to German law, the share of renewable energy sources in electric power supply is to increase from the present 6 percent to 12.5 percent by 2010. In Europe, the current 14 percent are to increase to 22 during the same period. There are still unresolved problems, however, e.g. origins of raw materials for substitute fuel production; collecting and conditioning; logistic problems of distribution; experience of producers and users; long-term availability. These problems, as well as some other ones, were discussed at the 19th network conference, as were requirements made on substitute fuels and their applications. Experts from economy, politics and science were given a platform for discussion, generation of knowledge, information transfer, and exchange of experience. (orig.) [German] Ersatzbrennstoffe liegen zur Zeit voll im Trend. Aus gutem Grund, denn zum einen dienen sie nach Vorgabe des Kreislaufwirtschafts- und Abfallgesetzes sowie der TA Siedlungsabfall als heizwertreiche Fraktion zur energetischen Verwertung. Zum anderen substituieren sie teure Regelbrennstoffe, und dies nicht nur in energieintensiven Branchen. Der Gesetzgebung folgend soll in Deutschland der Anteil der erneuerbaren Energien an der Stromerzeugung von derzeit 6 % auf 12,5 % im Jahr 2010 steigen. In ganz Europa soll der Anteil von derzeit 14 % auf 22 % anwachsen. Fur erneuerbare Energien, hierunter fallen biogene Ersatzbrennstoffe, existiert folglich ein Wachstumsmarkt. Es bleiben jedoch einige Fragen offen: Wo kommen die Abfaelle bzw. Rohstoffe zur Erzeugung von Ersatzbrennstoffen her? Wie erfolgen Erfassung und Aufbereitung? Welche logistischen Anforderungen existieren hinsichtlich der Distribution? Welche Erfahrungen sammeln derzeit Produzenten und Verwerter? Sind die Ersatzbrennstoffe auch zukunftig in ausreichender Menge fuer die angestrebte energetische

  4. A reference book on cross-frontier carriage of wastes; Praxishandbuch zur grenzueberschreitenden Abfallverbringung

    Wuttke, J.; Brach, M.; Lee, H.; Schmolke, A.; Wedemann, F.


    The objective of the regulatory system governing cross-frontier carriage of wastes is to prevent the transportation of wastes to countries which do not possess the technology and capacities required for environmentally sound disposal of the wastes, and in particular to see to it that non-utilizable wastes are disposed of as close as possible to the location where they are generated. The legal framework required for achieving these objectives in Europe has been built over the last few years at the international as well as national level. The common regulations for implementation of the Basel Convention which under Article 1 contains the legal provisions on cross-frontier carriage of wastes, set forth in particular the essential implementing provisions and the agreements complementing the EC Directive. The reference book provides guidance through the very complex regulatory system which is difficult to understand, as it encompasses not only different bodies of law or regulations, and numerous cross-references between them, but also the complex notification procedure covering a variety of cases, depending on the disposal method applied, the exporting, importing or transit states involved, and the types of waste carried. The book presents the relevant legal provisions as last amended, accompanied by texts explaining the contents and the context in practice. (orig./CB) [German] Die rechtliche Regelung der grenzueberschreitenden Verbringung von Abfaellen hat zum Ziel, die Verbringung von Abfaellen in Staaten, die nicht ueber die entsprechenden Kapazitaeten zur umweltvertraeglichen Entsorgung verfuegen, zu unterbinden und insbesondere nicht verwertbare Abfaelle moeglichst nah am Entstehungsort zu beseitigen. Diesen Zielen wurde sowohl durch umfangreiche internationale als auch nationale Regelwerke inzwischen Rechnung getragen. Mit dem Ausfuehrungsgesetz zum Basler Uebereinkommen, welches in Art. 1 das Abfallverbringungsgesetz enthaelt, werden insbesondere die wesentlichen

  5. The nuclear phase-out and its consequences; Der Atomausstieg und seine Folgen

    Ludwigs, Markus


    As a lesson from the Fukushima nuclear disaster, a radical change has taken place in climate and energy policy in Germany since 2011. This is characterized by the phase-out of the nuclear energy, which is fixed by the 13th Atomic Enforcement Act, by the end of 2022. This entails a multitude of complex legal questions and subsequent problems. The latest decisions are the forthcoming decisions of the BVerfG on the constitutional consistency of the nuclear phase-out law and nuclear fuel tax, Vattenfall's much discussed arbitration award before the ICSID arbitration court, and controversial legal questions both in the context of the decommissioning and dismantling of nuclear power plants and the disposal of highly radioactive waste. In addition, the moral-ethical evaluation of the nuclear phase-out and the power turn-around is the focus of the interdisciplinary approach. The problem clusters are analyzed by the contributions of the anthology. He documents a conference organized by Professor Dr. Markus Ludwig, which took place on April 8, 2016, at the University of Wuerzburg, within the framework of a project funded by the Fritz Thyssen Stiftung (''The Law of the Energy Transition''). [German] Als Lehre aus der Atomkatastrophe von Fukushima ist in Deutschland seit 2011 ein radikaler Wandel in der Klima- und Energiepolitik erfolgt. Praegend hierfuer ist der durch die 13. Atomgesetznovelle fixierte Ausstieg aus der Kernenergie bis Ende 2022. Damit verbunden ist eine Vielzahl komplexer Rechtsfragen und Folgeprobleme. Aktuelle Schlaglichter bilden die anstehenden Entscheidungen des BVerfG zur Verfassungskonformitaet von Atomausstiegsgesetz und Kernbrennstoffsteuer, die vieldiskutierte Schiedsklage von Vattenfall vor dem ICSID-Schiedsgericht sowie die kontroversen Rechtsfragen sowohl im Kontext der Stilllegung und des Rueckbaus von Kernkraftwerken als auch hinsichtlich der Endlagerung hochradioaktiver Abfaelle. Daneben steht in interdisziplinaerer

  6. Status and perspectives of waste product utilisation in the T2C plant at Hoechst; Stand und Perspektiven in der EBS-Verwertung in der T2C-Anlage Hoechst

    Lorbach, Dirk [Infraserv GmbH und Co. Hoechst KG, Frankfurt am Main (Germany). Geschaeftsfeld Energien


    The plant concept is based on combustion of a multitude of substitute fuels. According to the substitute fuel specifications for general entrepreneur EBARA, comminution of waste materials in a slow shredder should be sufficient, and experience so far has shown that this is indeed the case. The plant was commissioned in 2011, and the envisaged performance parameters were achieved after some initial difficulties, i.e. the envisaged volumes of waste could be combusted. The efficiency of heat generation was below expectations, however, as the integrated heat exchangers did not run at full capacity. Reconstruction of the plant is now planned with a view to optimizing the energy yield. It is expected that the energy efficiency goals will be reached in 2013. Modernisation will comprise retrofitting of a flue gas circulation system for better temperature control in the fluidized bed and for optimum energy yield. All other plant components - off-gas filters, water/steam cycle and turbine - work satisfactorily according to the planned parameters. (orig.) [German] Das Konzept der Anlage basiert auf der thermischen Verwertung einer Vielzahl von Ersatzbrennstoffen. Entsprechend der EBS-Spezifikation fuer den Generalunternehmer EBARA sollte fuer eine ausreichende Stueckgroesse eine Zerkleinerung der Abfaelle mit einem langsam laufenden Shredder ausreichen. In der bisherigen Inbetriebnahme hat sich gezeigt, dass dies grundsaetzlich von der Anlagentechnik, bis auf eine Einschraenkung, auch erreicht wird. Die Inbetriebnahme der Anlage wurde 2011 fuer den Dauerbetrieb abgeschlossen. Nach anfaenglichen Schwierigkeiten hat die Firma EBARA die vertraglichen Leistungsparameter im Bereich der Verbrennung erreicht. Die vorgesehenen EBS-Mengen koennen verbrannt werden. Bisher is allerdings die Waermeausbeute hinter den Erwartungen zurueckgeblieben, da die Einbauten in der Wirbelschicht, das sind integrierte Waermetauscher (HRC's), bisher ihre vollstaendige Leistung nicht erbracht

  7. Omega process for the use of substitute fuels; Waste energy: Omega-Verfahren zur Verwertung von Ersatzbrennstoffen

    Moeser, J. [Oxytec Energy GmbH, Leipzig (Germany)


    Only about 25% of residue accumulating in the Federal Republic of Germany is currently used for the purposes of energy. This residue will be converted into fuel for power stations by the Omega process when the dumping of waste with a calorific value in excess of 5 MJ/kg is prohibited with effect from 2005. This oxygen melting process is suitable for the local use of substitute fuels. Waste is converted into a high-quality synthesis gas with a wide range of uses. The Omega process combines drying, thermal decomposition, gasification and melting of the material used in a single-stage process. This is now technologically possible for the first time by combining a metallurgical cupola furnace with a traditional gas producer. The highly-calorific synthesis gas produced by the Omega process can be used in block heat and power stations or as an industrial fuel gas, instead of natural gas. It is also suitable as a starting material for synthesising methanol. The gas is specifically processed in the multi-stage gas scrubber downstream of the reactor. The by-products of the Omega process are recyclable slag and pig iron. The only residue is filter dust from gas scrubbing. The first power station based on the Omega process is currently under construction in Rothenburg. The plant, which has an electrical output of 7.5 MW and an uncouplable thermal output of up to 10 MW, should go into operation not later than 2005. Contracts have already been signed for the supply of electricity to the grid of Esag Energieversorgung Sachsen Ost AG, Dresden, and connection to the Rothenburg heating grid. Approximately 50,000 t of substitute fuel should be used annually. (orig.) [German] Ab dem Jahr 2005 duerfen Abfaelle mit einem Heizwert von mehr als 5 MJ/kg nicht mehr deponiert werden. Die anfallenden Reststoffe eignen sich als Rohstoff fuer Kraftwerke nach dem Omega-Verfahren zur dezentralen Verwertung. Der Autor beschreibt dieses innovative Sauerstoffschmelzverfahren, dessen Vorteile und

  8. Development and testing of methods for in-situ-monitoring the environmental problems in areas of abandoned open-pit lignite mines. Final report; Entwicklung und Erprobung von Methoden zur In-situ-Langzeitueberwachung fuer Probleme der Folgelandschaften des Braunkohlenbergbaus. Schlussbericht

    Knoedel, K.; Koenig, F.


    der Gesteinsschichten, durch das Einbringen und Ablagern fester und fluessiger Abfaelle sowie durch den Wiederanstieg des Grundwassers verursacht werden. Ausserdem dient die Monitoringtechnologie zur Kontrolle der Wirksamkeit von Sicherungs- und Sanierungsmassnahmen sowie zur Untersuchung der Prozesse der natuerlichen Selbstreinigung (Natural Attenuation) in diesen Gebieten. Die Ergebnisse des Projektes sind sowohl hinsichtlich der Reichweite des elektromagnetischen Ueberwachungssystems als auch bezueglich der Langzeitstabilitaet so ermutigend, dass die Leistungsfaehigkeit an einem Referenzobjekt im Langzeitversuch getestet werden soll. (orig.)

  9. Thorotrast-induced liver cancer: results of the German thorotrast study; Thorotrast-induzierte Tumoren der Leber. Ergebnisse der Deutschen Thorotraststudie

    Kaick, G. van; Bahner, M.L.; Liebermann, D.; Luehrs, H.; Wesch, H. [Deutsches Krebsforschungszentrum, Heidelberg (Germany). Forschungsschwerpunkt Radiologische Diagnostik und Therapie


    Aims: The X-ray contrast medium Thorotrast, used worldwide between 1930 to 1950 predominantly for arteriography, consisted of a colloidal solution of thorium dioxide. The radioactive thorium-232 (half-life 1.4 x 10{sup 10} years) is stored lifelong in the organs of the reticulo-endothelial system after intravascular injection, causing chronic exposure to alpha radiation. The aim of the German Thorotrast study is the assessment of radiation late effects and the calculation of risk estimates. Material and methods: The German Thorotrast study started in 1968 as a cohort study and comprises 2326 Thorotrast patients and 1890 patients of a matched control group. The Thorotrast patients who were still alive at the beginning of the study were examined by X-ray plain films of the upper abdomen and of the injection site of the contrast medium as well as by whole-body counter measurements. At the beginning we offered the patients ultrasound and later on CT and MRI at regular intervals for early detection of liver cancer. Results: To date 454 primary liver cancers have been registered in the group of Thorotrast patients compared to 3 cases in the control group. With the help of modern imaging methods relatively small liver cancers were detected and could be surgically removed. Discussion: There is a correlation between the mean accumulated dose to the liver and the incidence of liver cancer. The cumulative risk for liver malignancies is about 600 diseases per 10{sup 4} persons whose liver was exposed to 1 Gy. Also the incidence of liver cirrhosis is correlated with the mean accumulated dose to the liver. (orig.) [Deutsch] Zielsetzung: Das Roentgenkontrastmittel Thorotrast, das in den Jahren zwischen 1930 und 1950 weltweit v.a. fuer die Arteriographie zur Anwendung kam, bestand aus einer kolloidalen Loesung von Thoriumdioxid. Das radioaktive {sup 232}Th (Halbwertszeit: 1,4 x 10{sup 10} Jahre) wird in den Organen des retikuloendothelialen Systems zeitlebens gespeichert und

  10. Biocompatibility of coronary stent materials: effect of electrochemical polishing

    Scheerder, I. de [University Hospital Leuven (Belgium). Dept. of Cardiology; Sohier, J.; Froyen, L.; Humbeeck, J. van [Louvain Univ. (Belgium). Dept. of Metallurgy and Materials Engineering; Verbeken, E. [University Hospital Leuven (Belgium). Dept. of Pathology


    , lokalen Krankheiten, dem Stent und der Stentplatzierung. Biokompatibilisierung des Koronarstens durch Suchen nach mehr biokompatiblen Metalllegierungen, optimierten Oberflaechencharakteristiken und optimierte Stentkonzepte sollten resultieren in einem besseren spaeten Patent. Obendrein sind Stents die Heilmittel freilassen und radioaktive Stents in Entwicklung, damit die neointimale hyperplastische Antwort reduziert wird. (orig.)

  11. Materials and energy balance of a university - development of an environmental management concept for universities based on the example of Osnabrueck university. Final report; Stoff- und Energieflussanalyse einer Universitaet - Erstellung eines Umweltmanagementkonzepts fuer Hochschulen am Beispiel der Universitaet Osnabrueck. Abschlussbericht

    Matthies, M.; Viebahn, P.


    A material and energy analysis of Osnabrueck university was established with the goal of drawing up an environmental management concept for universities in general. The eco-balance was established in accordance with environmental specifications for energy, traffic, water, waste water, materials, waste and terrain. An environmental protection programme was developed on this basis, as well as an environmental information system for the university. The final stage comprised networking activities ( A bibliography is presented. [German] In Abschnitt I wird zunaechst eine Zusammenfassung der Projektergebnisse gegeben (Kapitel 2). Die ausfuehrliche Darstellung des Projektes beginnt in Kapitel 3 mit einem Ueberblick ueber das Projekt und seine Entstehung. In Kapitel 4 wird ein Ueberblick ueber die Universitaet Osnabrueck gegeben; in Kapitel 5 wird die Notwendigkeit eines UMS' fuer Hochschulen begruendet und als eines der moeglichen Instrumente die EG-Oeko-Audit-Verordnung beschrieben. In Abschnitt II beginnt die Beschreibung der einzelnen Bausteine des Osnabruecker Umweltmanagement-Modells. In Kapitel 6 wird dargestellt, wie die umweltrelevanten Taetigkeiten in den Organisationsstrukturen der Universitaet verankert werden sollten (Baustein UM 1). In den Kapiteln 7 und 8 werden die Umweltleitlinien der Universitaet Osnabrueck (Baustein UM 2) sowie die externen Umweltvorschriften (Baustein UM 3) wiedergegeben. In Abschnitt III erfolgt die Erstellung der Oekobilanz der Universitaet Osnabrueck (Baustein UM 4), der Schwerpunkt des Projektes. In Kapitel 9 wird zunaechst eine Einfuehrung in die Oekobilanzierung gegeben. In Kapitel 10 folgt die Zieldefinition und die Beschreibung der Sachbilanz. Hier wird auch auf die verwendete Software UMBERTO naeher eingegangen. In den Kapiteln 11-16 werden die Teilbilanzen Energie, Verkehr, Wasser und Abwasser, Materialien, Abfaelle und Flaechen beschrieben. In Kapitel 17 erfolgt schliesslich die Zusammenfuehrung der

  12. Current situation regarding the co-combustion of waste materials in power plants; Aktuelle Situation der Mitverbrennung von Abfallstoffen in Kraftwerken

    Schirmer, U.; Krueger, H.; Puch, K.H. [VGB Technische Vereinigung der Grosskraftwerksbetreiber e.V., Essen (Germany)


    Reststoffen und Abfaellen zwangslaeufig. Sie wurde in vielen VGB-Mitgliedsunternehmen erwogen und bereits in mehreren Faellen konkret geprueft. Dabei beruecksichtigte die Bearbeitung folgende grundsaetzlichen Positionen: - Die VGB-Mitgliedsunternehmen sind bereit, sich an der Loesung der oben genannten Aufgaben zu beteiligen, soweit dies ohne Beeintraechtigung ihrer Verpflichtungen zur Energieversorgung moeglich ist. - Die Uebernahme derartiger Verpflichtungen kann nur unter Wahrung der genehmigungsrechtlichen Voraussetzungen erfolgen. Dies gilt fuer die Qualitaet und die anfallenden Mengen der zu uebernehmenden Abfaelle, fuer die Emissionen und fuer die Entsorgung der Verbrennungsrueckstaende. - Der Betrieb von Kraftwerksanlagen beinhaltet eine weitgehende Verwertung der anfallenden Prozessrueckstaende, die nach Moeglichkeit durch die Mitverbrennung nicht beeintraechtigt werden darf. - Die technische Aufgabe der Mitverbrennung von geeigneten Rueckstaenden und Abfaellen ist in der Regel loesbar. Sie stellt eine Alternative und Ergaenzung zu reinen Abfallverwertungsanlagen oder Anlagen zur Verwertung von geeigneten Rueckstaenden dar. Darueber hinaus sind einige Unternehmen daran interessiert, durch Abschoepfen der Zuzahlungen fuer diese Abfallverwertung wirtschaftliche Vorteile zu erlangen. Eine VGB-Arbeitsgruppe hat sich bereits 1990 bis 1992 auf dieser Basis mit der Mitverbrennung auseinandergesetzt und die Grundlagen fuer die im folgenden dargestellten Ueberlegungen erarbeitet. (orig.)

  13. Gas amplification properties of GEM foils; Gasverstaerkungseigenschaften von GEM-Folien

    Beck, Jeannine


    procedure were developed and a laser-measurement arrangement for the measurement of GEM surface profiles designed and tested. The Planeness of framed GEM foils was determined, whereby height differences up to 1 mm resulted. [German] Im Rahmen des Detektorkonzeptes International Linear Detector fuer das kuenftige Beschleunigerprojekt International Linear Collider, an dem Elektronen und Positronen bei Schwerpunktsenergien von 500 GeV zur Kollision gebracht werden, soll eine Zeit-Projektions-Kammer als zentrale Spurkammer eingesetzt werden. Mit der Verwendung einer derartigen Kammer als Spurdetektor ist eine dreidimensionale Rekonstruktion der Spurpunkte moeglich. Durchfliegt ein Teilchen das Gasvolumen innerhalb der Kammer, ionisiert es einzelne Gasatome und die entstandenen Elektronen bewegen sich nach der Verstaerkung in der GEM-Anordnung (engl. Gas Electron Multiplier) zur Anode, so dass eine zweidimensionale Projektion der Teilchenspur moeglich ist. Die dritte Dimension wird aus der Driftzeit der Elektronen errechnet. Die Vorteile dieses Auslesesystems bestehen darin, dass eine bessere Ortsaufloesung als mit einer Vieldraht-Proportional-Kammer erreicht wird und die rueckdriftenden Ionen stark unterdrueckt werden koennen. Ziel dieser Arbeit sind Untersuchungen fuer ein GEM-Modul, das in einem grossen TPCPrototypen genutzt werden soll. Hinsichtlich verschiedener Anforderungen gilt es unterschiedliche GEMs zu vergleichen, um eine optimale Auswahl treffen zu koennen. In einem am DESY vorhandenen kleinen Prototypen wurden Messungen zur Erfassung von GEM-beschreibenden Parametern durchgefuehrt. Die Inbetriebnahme der Test-TPC war Bestandteil dieser Arbeit. Es wurden Spuren durch eine radioaktive Quelle erzeugt, mit deren Hilfe die Gasverstaerkung bestimmt wurde. Mit dem Messaufbau wurden verschiedenartige Gasverstaerkerfolien hinsichtlich ihrer Verstaerkungseigenschaften und ihres Energieaufloesungsvermoegens verglichen und systematisch studiert. Es wurden fuenf