Confirmation of shutdown cooling effects

Journal Article · Thu Dec 31 00:00:00 EST 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4938776· OSTI ID:22499110

Sato, Kotaro; Tabuchi, Masato; Sugimura, Naoki; Tatsumi, Masahiro ^[1]

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1. Nuclear Engineering, Limited, 1-3-7 Tosabori Nishi-ku, Osaka-shi, Osaka 550-0001 (Japan)

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 UO{sub 2} 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 UO{sub 2} 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.

• OSTI ID: 22499110
• Journal Information: AIP Conference Proceedings, Vol. 1702, Issue 1; Conference: ICCMSE 2015: International conference of computational methods in sciences and engineering 2015, Athens (Greece), 20-23 Mar 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
A CODES
BURNUP
COOLING
FUKUSHIMA DAIICHI NUCLEAR POWER STATION
ISOTOPE RATIO
JAPAN
MIXED OXIDE FUELS
NUCLEAR DECAY
NUCLEAR POWER PLANTS
REACTIVITY
REACTOR ACCIDENTS
REACTOR OPERATION
REACTOR SHUTDOWN
STEADY-STATE CONDITIONS
URANIUM DIOXIDE