Safety Design and Evaluation in a Large-Scale Japan Sodium-Cooled Fast Reactor
| Autor: | Shigenobu Kubo, Tohru Suzuki, Hidemasa Yamano, Kenichi Kurisaka, K. Fujita, Yoshio Shimakawa |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Engineering
Article Subject business.industry Nuclear engineering Scale (chemistry) Shutdown Accident analysis Scram Sodium-cooled fast reactor Natural circulation Reliability (semiconductor) Nuclear Energy and Engineering lcsh:Electrical engineering. Electronics. Nuclear engineering Decay heat business lcsh:TK1-9971 Simulation |
| Zdroj: | Science and Technology of Nuclear Installations, Vol 2012 (2012) |
| ISSN: | 1687-6075 |
| DOI: | 10.1155/2012/614973 |
| Popis: | As a next-generation plant, a large-scale Japan sodium-cooled fast reactor (JSFR) adopts a number of innovative technologies in order to achieve economic competitiveness, enhanced reliability, and safety. This paper describes safety requirements for JSFR conformed to the defense-in-depth principle in IAEA. Specific design features of JSFR are a passive reactor shutdown system and a recriticality-free concept against anticipated transients without scram (ATWS) in design extension conditions (DECs). A fully passive decay heat removal system with natural circulation is also introduced for design-basis events (DBEs) and DECs. In this paper, the safety design accommodation in JSFR was validated by safety analyses for representative DBEs: primary pump seizure and long-term loss-of-offsite power accidents. The safety analysis also showed the effectiveness of the passive shutdown system against a typical ATWS. Severe accident analysis supported by safety experiments and phenomenological consideration led to the feasibility of in-vessel retention without energetic recriticality. Moreover, a probabilistic safety assessment indicated to satisfy the risk target. |
| Databáze: | OpenAIRE |
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