Burnup estimation of fuel sourcing radioactive material based on monitored Cs and Pu isotopic activity ratios in Fukushima N. P. S. accident

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

OSTI ID:22107775

Yamamoto, T.; Suzuki, M.; Ando, Y. ^[1]

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1. Japan Nuclear Energy Safety Organization, Toranomon Towers Office, 14F, 4-1-28, Toranomon, Minato-ku, Tokyo 105-0001 (Japan)

After the severe core damage of Fukushima Dai-Ichi Nuclear Power Station, radioactive material leaked from the reactor buildings. As part of monitoring of radioactivity in the site, measurements of radioactivity in soils at three fixed points have been performed for {sup 134}Cs and {sup 137}Cs with gamma-ray spectrometry and for Pu, Pu, and {sup 240}Pu with {alpha}-ray spectrometry. Correlations of radioactivity ratios of {sup 134}Cs to {sup 137}Cs, and {sup 238}Pu to the sum of {sup 239}Pu and {sup 240}Pu with fuel burnup were studied by using theoretical burnup calculations and measurements on isotopic inventories, and compared with the Cs and Pu radioactivity rations in the soils. The comparison indicated that the burnup of the fuel sourcing the radioactivity was from 18 to 38 GWd/t, which corresponded to that of the fuel in the highest power and, therefore, the highest decay heat in operating high-burnup fueled BWR cores. (authors)

• Research Organization: American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
• OSTI ID: 22107775
• Resource Relation: Conference: ICAPP '12: 2012 International Congress on Advances in Nuclear Power Plants, Chicago, IL (United States), 24-28 Jun 2012; Other Information: Country of input: France; 18 refs.; Related Information: In: Proceedings of the 2012 International Congress on Advances in Nuclear Power Plants - ICAPP '12| 2799 p.
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
ALPHA SPECTROSCOPY
BURNUP
BWR TYPE REACTORS
CESIUM 134
CESIUM 137
COMPARATIVE EVALUATIONS
GAMMA SPECTROSCOPY
NUCLEAR FUELS
PLUTONIUM
PLUTONIUM 238
PLUTONIUM 239
PLUTONIUM 240
RADIOACTIVE MATERIALS
RADIOACTIVITY
REACTOR ACCIDENTS
SOILS
UNINTERRUPTIBLE POWER SUPPLIES