1. Confirmation of Shutdown Cooling Effects.
- Author
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Kotaro Sato, Masato Tabuchi, Naoki Sugimura, and Masahiro Tatsumi
- Subjects
FUKUSHIMA Nuclear Accident, Fukushima, Japan, 2011 ,NUCLEAR reactor cooling ,LATTICE theory ,NUCLEAR power plants ,NUCLEAR fuels - Abstract
After the Fukushima accidents, all nuclear power plants in Japan have gradually stopped their operations and have long periods of shutdown. During those periods, reactivity of fuels continues to change significantly especially for high-burnup UO2 fuels and MOX fuels due to radioactive decays. It is necessary to consider these isotopic changes precisely, to predict neutronics characteristics accurately. In this paper, shutdown cooling (SDC) effects of UO2 and MOX fuels that have unusual operation histories are confirmed by the advanced lattice code, AEGIS. The calculation results show that the effects need to be considered even after nuclear power plants come back to normal operation. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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