Comparison of Calculated Values with Measured Values on the Amount of TRU and FP Nuclides Accumulated in Gadolinium Bearing PWR Spent Fuels
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概要
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Destructive analyses for five spent fuel samples taken from a Gd bearing fuel assembly were done. The measured amounts of actinides of <SUP>234-238</SUP>U, <SUP>237</SUP>Np, <SUP>238-242</SUP>Pu, <SUP>241, 242m, 243</SUP>Am and <SUP>242, 244</SUP>Cm, and fission products of <SUP>134</SUP>Cs and <SUP>154</SUP>Eu were used for evaluating the accuracy of calculation made by CASMO-MICBURN and ORIGEN-2 codes. The effect of Gd on the neutron spectrum was taken into account in the CASMO-MICBURN calculation.<BR>The amounts of <SUP>235</SUP>U, <SUP>239</SUP>Pu and <SUP>241</SUP>Pu calculated by CASMO-MICBURN agreed well with the observed values within about 3%. On the other hand, the amounts obtained from ORIGEN-2 calculation showed lower values than those observed, especially by -12% in average in <SUP>235</SUP>U for Gd<SUB>2</SUB>O<SUB>3</SUB>-UO<SUB>2</SUB> fuel. The main cause of this large difference may be attributed to the effect of Gd on the neutron spectrum. The amounts of the other actinides by both calculation codes revealed no significant difference in nearly 10% except for <SUB>242m</SUB>Am, in which a large fluctuation among the samples was observed. About 10 % difference between the measured values and the calculated values was also observed for <SUB>134</SUB>Cs, but the calculated values for <SUB>154</SUB>Eu showed a significant difference from measured values.
著者
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NAKAHARA YOSHINORI
Department of Environmental Sciences
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GUNJI KATSUBUMI
Department of Environmental Sciences
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Suzuki Toshio
Department Of Agronomy Faculty Of Agriculture Tohoku University
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ADACHI Takeo
Department of Chemistry and Fuel Research, Japan Atomic Energy Research Institute
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KAWAMURA Mitsuru
Engineering Department, Nuclear Engineering Ltd.
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YOSHIKUNI Masaaki
Technical Development Department, Nuclear Fuel Industries Ltd.
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Tachikawa Enzo
Department of Chemistry, Japan Atomic Energy Research Institute
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KOHNO Nobuaki
Department of Chemistry and Fuel Research, Japan Atomic Energy Research Institute
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SONOBE Tamotsu
Department of Chemistry and Fuel Research, Japan Atomic Energy Research Institute
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ONUKI Mamoru
Department of Chemistry and Fuel Research, Japan Atomic Energy Research Institute
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KATO Kaneharu
Department of Chemistry and Fuel Research, Japan Atomic Energy Research Institute
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INOUE Shin
The Kansai Electric Power Co.
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TAKAYASU Masaharu
Technical Development Department, Nuclear Fuel Industries Ltd.
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KOBAYASHI Shinichi
Technical Development Department, Nuclear Fuel Industries Ltd.
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TERUYA Zenji
Engineering Department, Nuclear Engineering Ltd.
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KAWAMOTO Tadao
Engineering Department, Nuclear Engineering Ltd.
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NAKAHARA Yoshinori
Department of Chemistry and Fuel Research, Japan Atomic Energy Research Institute
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