TAGS and FP Decay Heat Calculations(Ⅱ)-Impact on the LOCA Condition Decay Heat

摘要

Introducing the TAGS (Total Absorption Gamma-ray Spectrometer) data, we calculated the FP decay heat for Pu-239, Pu-241, U-233 and U-235 after one-year irradiation. In order to see the impact of the introduction of the TAGS data on LOCA (Loss of Coolant Accident) analysis in LWRs, those results were compared with the calculations based on the original data libraries such as JENDL, JEF-2.2 and ENDF/B-VI which are widely used in the summation calculation of the FP decay heat. It was concluded that the decay heat calculation introducing TAGS data dose not exert any decisive impact on the LOCA analysis from the practical point of view. Further study is, however, required to validate the reliability of the TAGS data as the input of summation calculations.