Estimation of average burnup of damaged fuels loaded in Fukushima Dai-ichi reactors by using the {sup 134}Cs/{sup 137}Cs ratio method

Conference · Sun Jul 01 04:00:00 EDT 2012

OSTI ID:22105808

Endo, T.; Sato, S.; Yamamoto, A. ^[1]

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1. Dept. of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya Univ., Furo-cho, Chikusa-ku, Nagoya-shi, 464-8603 (Japan)

Average burnup of damaged fuels loaded in Fukushima Dai-ichi reactors is estimated, using the {sup 134}Cs/{sup 137}Cs ratio method for measured radioactivities of {sup 134}Cs and {sup 137}Cs in contaminated soils within the range of 100 km from the Fukushima Dai-ichi nuclear power plants. As a result, the measured {sup 134}Cs/{sup 137}Cs ratio from the contaminated soil is 0.996{+-}0.07 as of March 11, 2011. Based on the {sup 134}Cs/{sup 137}Cs ratio method, the estimated burnup of damaged fuels is approximately 17.2{+-}1.5 [GWd/tHM]. It is noted that the numerical results of various calculation codes (SRAC2006/PIJ, SCALE6.0/TRITON, and MVP-BURN) are almost the same evaluation values of {sup 134}Cs/ {sup 137}Cs ratio with same evaluated nuclear data library (ENDF-B/VII.0). The void fraction effect in depletion calculation has a major impact on {sup 134}Cs/{sup 137}Cs ratio compared with the differences between JENDL-4.0 and ENDF-B/VII.0. (authors)

• Research Organization: American Nuclear Society, Inc., 555 N. Kensington Avenue, La Grange Park, Illinois 60526 (United States)
• OSTI ID: 22105808
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
54 ENVIRONMENTAL SCIENCES
BURNUP
CESIUM 134
CESIUM 137
EVALUATION
FUKUSHIMA-1 REACTOR
FUKUSHIMA-2 REACTOR
FUKUSHIMA-3 REACTOR
FUKUSHIMA-4 REACTOR
FUKUSHIMA-5 REACTOR
FUKUSHIMA-6 REACTOR
NUCLEAR DATA COLLECTIONS
NUCLEAR FUELS
NUCLEAR POWER PLANTS
POLLUTION
RADIOACTIVITY
SOILS
VOID FRACTION