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The ray spectrum measurement was conducted for a sample taken from a PWR lead used assembly and photon spectrum data for higher energy region than usual case was obtained. Burnup calculation adopting MVP-BURN code was carried out for the sample and the agreement between experimental data and the calculation results was confirmed.

Oral presentation

Source term estimation based on environmental monitoring data

Nagai, Haruyasu

no journal, ,

no abstracts in English

Oral presentation

Measurement and burnup analysis of $^{106}$ Ru/ $^{144}$ Ce activity ratio for spent fuel cooled more than 10 years

Sato, Shunsuke*; Nauchi, Yasushi*; Hayakawa, Takehito*; Kimura, Yasuhiko; Suyama, Kenya

no journal, ,

It is difficult to measure -ray from short half-life nuclides such as $^{106}$ Ru-106 and $^{144}$ Ce in used fuel with more than 10 year cooling time. In this study, we make it possible to measure radiation of these nuclides by changing detection efficiency with install of polyethylene block. We obtained good agreement of activity ratio of $^{106}$ Ru/ $^{144}$ Ce between measurement and calculation.

Oral presentation

Measurement of radioactivity ratio $^{106}$ Ru/ $^{144}$ Ce and burnup analyses

Sato, Shunsuke*; Nauchi, Yasushi*; Hayakawa, Takehito*; Kimura, Yasuhiko; Suyama, Kenya

no journal, ,

We evaluated the activity ratio of $^{106}$ Ru to $^{144}$ Ce by measurement of polyethylene-transmitted radiation from used nuclear fuel cooled more than 10 years. We confirmed that the ratio could be used for the burnup confirmation because we could obtain good agreement between calculation and experiment.

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5.2.1 Models on radionuclides release from fuel under severe accident conditions, 5.4.5 Technical issues of current radionuclide behavior models obtained from the Fukushima accident analyses

Distributions of uranium-series radionuclides in rock and migration rate of uranium at the Koongarra uranium deposit, Australia

Uranium micro-isotopic analysis of weathered rock by a sensitive high resolution ion microprobe (SHRIMPII)

Distribution and behavior of radionuclides in the surface soil around the Chernobyl Nuclear Power Plant

Selective extraction procedure and itsimportance in a natural analogue study; Case study at the Koongarra uranium deposit

Groundwater geochemistry in the Koongarra ore deposit, Australia, II; Activity ratios and migration mechanisms of uranium series radionuclides

Uranium distribution in mineral phases of rock by sequential extraction procedure

Activity ratio measurement and burnup analysis for PWR lead use assembly

Source term estimation based on environmental monitoring data

Measurement and burnup analysis of $^{106}$ Ru/ $^{144}$ Ce activity ratio for spent fuel cooled more than 10 years

Measurement of radioactivity ratio $^{106}$ Ru/ $^{144}$ Ce and burnup analyses