Fuel R&D Needs and Strategy towards a Revision of Acceptance Criteria
Fuel R&D Needs and Strategy towards a Revision of Acceptance Criteria
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燃料R
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发表时间：
2010
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通讯作者：
J. Micaelli
中科院分区：
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作者：
F. Barré;C. Grandjean;M. Petit;J. Micaelli
事故条件下燃料性能的研究是压水堆安全性分析中的一个重要问题。设计基础事故的后果，如冷却剂损失事故和反应性引发事故，必须与安全标准进行量化比较。这些标准是在1970年代根据用新鲜或低辐照燃料进行的实验确定的。从20世纪90年代开始，日益加剧的工业竞争和限制导致公用事业公司在越来越激进的条件下使用燃料（更高的排放燃耗，更高的功率，负载跟踪等），并为开发具有改进性能的先进燃料设计（添加添加剂的新燃料类型，具有更好耐腐蚀性的包层材料等）创造了激励条件。这些预期已久的发展涉及需要对辐照燃料的行为进行新的调查，以便检查目前标准的适当性，评价安全边际，为建模提供新的技术基础，并允许这些标准的发展。法国和其他几个国家目前正在讨论这种演变，以期在今后几年内进行修订。为此，IRSN制定了研发战略。
The study of fuel behaviour under accidental conditions is a major concern in the safety analysis of the Pressurised Water Reactors. The consequences of Design Basis Accidents, such as Loss of Coolant Accident and Reactivity Initiated Accident, have to be quantified in comparison to the safety criteria. Those criteria have been established in the 1970s on the basis of experiments performed with fresh or low irradiated fuel. Starting in the 1990s, the increased industrial competition and constraints led utilities to use fuel in more and more aggressive conditions (higher discharge burnup, higher power, load follow, etc.) and create incentive conditions for the development of advanced fuel designs with improved performance (new fuel types with additives, cladding material with better resistance to corrosion, etc.). These long anticipated developments involved the need for new investigations of irradiated fuel behaviour in order to check the adequacy of the current criteria, evaluate the safety margins, provide new technical bases for modelling and allow an evolution of these criteria. Such an evolution is presently under discussion in France and several other countries, in view of a revision in the next coming years. For this purpose, a R&D strategy has been defined at IRSN.