Results 1 - 10 of 439
Results 1 - 10 of 439. Search took: 0.026 seconds
|Sort by: date | relevance|
[en] Introduction: Increase the initial enrichment of nuclear fuel result in possible reduce the fuel cycle cost due to lengthening the reactor campaign from 12 to 18 or even 24 months, or due to reduction of fuel batch every year 1/3, 1/4 or 1/5 part of the core Currently, the initial enrichment of fuel is steadily approaching the mark of 5% and average burnup has already exceeded the level of 50 MWd/tU Now an objective of the transition of initial enrichment to the range of 5 -10% and the burn up to 100 MWd/tU becomes on the agenda.
[en] Challenges for safeguarding a geological repository of spent nuclear fuel pose many high-level opportunities. First, being a relative late-comer among the various types of nuclear facilities subject to safeguards, the geological repository is an ideal candidate for applying ―safeguards by design‖ (SBD). Second, a repository is unlike all other nuclear facilities such that containment and surveillance (C/S) arguably should constitute the primary safeguards approach, rather than material accountancy. Several states have already invested many years and resources toward implementing final disposal of spent nuclear fuel in a geological repository. We consider the unfolding safeguards consideration of geological repositories from the perspectives of SBD, safety, security and safeguards (3S), and C/S. In this paper, a proposed approach for efficient implementation of Safeguards-by-Design (SBD) early into the design process of repository of spent nuclear fuel is proposed. The proposed approach describes the involved parties, their roles and responsibilities, ways of coordination and collaboration as well as main areas to be considered. International best practices in this regards are also presented and discussed. (author)
[en] 45 years since it was first conceived and after reprocessing over 9,300 tonnes of fuel, THORP sheared its last fuel assembly on 9th November 2018. Providing a vital service to UK, European and international reactor operations, the facility will continue to store fuel for at least the next 50 years. This presentation will look back at some of the history, the economics and lessons learnt more than 24 years of successful operation and forward to a new future for the staff and facility. (author)
[en] The protection of radioactive materials against disruptive action or other interference by third parties is part of the dangerous goods regulations according to Chapter 1.10 ADR. However, these regulations are not considered further in the following. Rather, current developments in the field of radiation protection law will be discussed. In this context, safety during the transport of nuclear fuels are not considered in detail, as a set of rules based on nuclear law regulations has already existed for years.
[de]Die Sicherung radioaktiver Stoffe gegen Störmaßnahmen oder sonstige Einwirkung Dritter ist Teil der gefahrgutrechtlichen Vorschriften nach Kapitel 1.10 ADR. Diese Vorschriften sollen im Folgenden aber nicht weiter berücksichtigt werden. Vielmehr soll auf die aktuellen Entwicklungen bzgl. der Sicherung im Bereich des Strahlenschutzrechtes eingegangen werden. Dabei soll auch die Sicherung bei der Beförderung von Kernbrennstoffen nicht näher betrachtet werden, da hierfür bereits ein seit Jahren bestehendes Regelwerk auf Grundlage atomrechtlicher Regelungen existiert.
[en] This publication gives practical information and examples on safety analysis principles and methods as well as the contents of licensing documentation needed to support application of IAEA safety standards to nuclear fuel cycle facilities. A systematic methodology is presented, covering the establishment of acceptance criteria, hazard evaluation, identification of postulated initiating events, analysis of accident sequences and consequences. Information is also provided on application of the results of the safety analysis in the design and operational phases, and on appropriate management system processes. The publication applies to all lifetime stages of relevant facilities and for modifications and upgrades. The information presented may be used for periodic safety reviews and consideration of extended lifetime of facilities. With respect to licensing documentation, the publication provides indicative contents and format of the safety analysis report as a higher level document that incorporates the information required at various steps in the licensing and re-licensing process.
[en] Summary: • The metallic fuel improves safety and economics. • Fewer refueling outages is a desire of many of the utilities we have talked with. • Power uprates are desirable under the new Clean Power Plan. • Less susceptibility to fuel failures resulting in fission products entering the coolant. • No significant change for the operators. • User can select the operation mode that best suits their power market(s). • The internal rate of return shows the fuel pays for itself very quickly.
[en] The transport of radioactive materials is regulated worldwide by an extensive, multifaceted and complex system of international conventions, guidelines and recommendations. However, they represent binding national law only to the extent that they have been implemented - in whole or in part - into national law. The legal system covers all types of radioactive materials and modes of transport with the aim of effectively protecting persons, material goods and the environment from the risks associated with transport.
[de]Die Beförderung radioaktiver Stoffe wird weltweit durch ein umfangreiches, vielschichtiges und komplexes System internationaler Übereinkommen, Richtlinien und Empfehlungen geregelt. Sie repräsentieren innerstaatlich bindendes Recht jedoch nur insoweit, sofern sie - ganz oder teilweise - in national geltendes Recht umgesetzt worden sind. Das Rechtssystem erstreckt sich auf alle Arten radioaktiver Stoffe und Verkehrsträger mit der Zielsetzung, Personen, Sachgüter und die Umwelt vor den mit der Beförderung einhergehenden Gefahren wirksam zu schützen.
[en] The FNO FSUE ―MCC‖ is a dynamically developing high-tech enterprise of the nuclear fuel cycle, which was identified in the State Corporation ―Rosatom‖ development strategy as the key enterprise responsible for closing the nuclear fuel cycle (NFC). (author)
[en] Thermal properties play a crucial role in extracting economic performance and ensuring operational safety of nuclear materials and particularly nuclear fuels. A knowledge of variation of various properties with temperature is essential for design of fuel, developing fabrication routes, characterization and operation. Reprocessing of fast reactor fuels, whether by aqueous or non-aqueous route, also involves knowledge of thermal effects on various process operations. This is also true of nuclear waste immobilization. The talk will provide a broad overview of thermal studies that contribute to development of various stages of nuclear fuel cycle. (author)