Isotopic Analysis of Actinides and Fission Products in LWR High-Burnup UO_2 Spent Fuels and its Comparison with Nuclide Composition Calculated Using JENDL, ENDF/B, JEF and JEFF

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概要

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• A chemical isotopic analysis of the actinides and fission products of a high-burnup PWR-UO2 fuel with an average burnup of 60.2 MWd/kgHM was carried out to accumulate extensive nuclide composition data. Furthermore, computational analysis was performed using the integrated burnup calculation code SWAT. The differences between the amounts obtained by the chemical isotopic analysis and SWAT calculation using JENDL-3.2, JENDL-3.3, ENDF/B-VI.5, ENDF/B-VI.8, JEF-2.2 and JEFF-3.0 were evaluated as the ratios of the calculated values to the experimental values (C/E ratios). For actinides, the calculated 244Cm amount, which is an important nuclide as a major neutron source in spent fuels, was underestimated. The main sensitive path for 244Cm was therefore investigated by a simple depletion calculation for actinides and the cause of the underestimation of the calculated 244Cm amount is discussed. The fission products 88Sr, 90Sr, 89Y, 106Ru, 133Cs, 135Cs and 144Nd, for which the C/E ratios were larger than 1.05 or smaller than 0.95, were investigated to improve their C/E ratios by a simple depletion calculation with simplified burnup chains and sensitivity coefficients, and the correction values for the fission yields or capture cross sections were estimated. The effect of power history on nuclide composition was also investigated. Additionally, the fission products for which the C/E ratios strongly depend on the type of library are discussed using sensitivity coefficients.

• 社団法人 日本原子力学会の論文
• 2008-04-25

著者

• KIYANAGI Yoshiaki

  Hokkaido University

• SASAHARA Akihiro

  Nuclear Technology Research Laboratory, Central Research Institute of Electric Power Industry

• MATSUMURA Tetsuo

  Material Science Research Laboratory, Central Research Institute of Electric Power Industry

• NICOLAOU Giorgos

  Laboratory of Nuclear Technology, Department of Electrical and Computer Engineering, Faculty of Engi

• KIYANAGI Yoshiaki

  Graduate School of Engineering, Hokkaido University

• Sasahara Akihiro

  Nuclear Technology Research Laboratory Central Research Institute Of Electric Power Industry

• Kiyanagi Yoshiaki

  Hokkaido Univ.

• Kiyanagi Yoshiaki

  Graduate School Of Engineering Hokkaido University

• Matsumura Tetsuo

  Material Science Research Laboratory Central Research Institute Of Electric Power Industry

• Matsumura Tetsuo

  Central Research Institute Of Electric Power Industry

• Nicolaou Giorgos

  Laboratory Of Nuclear Technology Department Of Electrical And Computer Engineering Faculty Of Engine

• Kiyanagi Yoshiaki

  Faculty of Engineering, Hokkaido University

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