Burn-up credit in criticality safety of PWR spent fuel
| Autor: | Mohamed K. Shaat, Rowayda F. Mahmoud, Saeed Agamy, Adel A. Abdelrahman, Mohammad Nagy |
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| Rok vydání: | 2014 |
| Předmět: |
Nuclear and High Energy Physics
Storage pool Engineering Waste management business.industry Mechanical Engineering Pressurized water reactor Spent nuclear fuel law.invention Nuclear Energy and Engineering Criticality law Data library General Materials Science Water density Safety Risk Reliability and Quality business Waste Management and Disposal |
| Zdroj: | Nuclear Engineering and Design. 280:628-633 |
| ISSN: | 0029-5493 |
| DOI: | 10.1016/j.nucengdes.2014.09.001 |
| Popis: | The criticality safety calculations were performed for a proposed design of a wet spent fuel storage pool. This pool will be used for the storage of spent fuel discharged from a typical pressurized water reactor (PWR). The mathematical model based on the international validated codes, WIMS-5 and MCNP-5 were used for calculating the effective multiplication factor, keff, for the spent fuel stored in the pool. The data library for the multi-group neutron microscopic cross-sections was used for the cell calculations. The keff was calculated for several changes in water density, water level, assembly pitch and burn-up with different initial fuel enrichment and new types and amounts of fixed absorbers. Also, keff was calculated for the conservative fresh fuel case. The results of the calculations confirmed that the effective multiplication factor for the spent fuel storage is sub-critical for all normal and abnormal states. The future strategy for the burn-up credit recommends increasing the fuel burn-up to a value >60.0 GWD/MTU, which requires new fuel composition and new fuel cladding material with the assessment of the effects of negative reactivity build up. |
| Databáze: | OpenAIRE |
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