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Title: Confirmation of shutdown cooling effects

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.
Authors:
; ; ;  [1]
  1. Nuclear Engineering, Limited, 1-3-7 Tosabori Nishi-ku, Osaka-shi, Osaka 550-0001 (Japan)
Publication Date:
OSTI Identifier:
22499110
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1702; Journal 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)
Country of Publication:
United States
Language:
English
Subject:
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