[2A05-09] Radioactivity Inventory

[2A06] Standard models of commercial nuclear reactor in Japan for using radioactivity calculations

(3) Test calculation of BWR model

*Kazuaki Kosako¹, Takuma Noto¹, Hayato Takeshita¹, Yuki Sasaki¹, Kazuyuki Torii¹ (1. Shimizu Corporation)

Keywords:BWR, Decommissioning, Reactor pressure vessel, Biological shielding wall, Reactor power, Radioactivity, Radioactivation calculation, Neutron transport calculation

To carry out the decommissioning accurately, it is necessary that the radioactivation calculation uses the results of neutron transport calculation in consideration of an individual difference of power plant. We prepared the standard model for the neutron transport calculation to boiling water reactors (BWR) including 15 plants of decommissioning. The BWR standard model classified roughly to four kinds by the reactor power. We performed test calculations of the neutron spectra in reactor core and the radioactivation in biological shielding wall and confirmed the validity of the model.