2023 Fall Meeting

Presentation information

Oral presentation

III. Fission Energy Engineering » 301-1 Reactor Physics, Utilization of Nuclear Data, Criticality Safety

[2M10-12] Experimental Analysis

Thu. Sep 7, 2023 3:20 PM - 4:10 PM Room M (ES Bildg. 3F ES034)

Chair:Rei Kimura(Toshiba ESS)

3:20 PM - 3:35 PM

[2M10] Practical gamma ray measurement of short half-life noble gas (135Xe, 88Kr) emitted by fuel debris for criticality estimation

*Eka Sapta Riyana1, Ikuo Kanno1, Masahiro Sakamoto1, Taichi Matsumura1, Kenichi Terashima1, Keisuke Okumura1 (1. JAEA)

Keywords:Fuel Debris, Subcritical System, Neutron Multiplication Factor, Short Half-life Fission Products, activity ratio of 88Kr to 135Xe.

Our previous study showed a linear relationship between the activity ratio of 88Kr to 135Xe and the effective multiplication factor, keff, in a primary containment vessel (PCV) and in a fuel debris canister. The accuracy of the activity ratio, which closely related to the accuracy of predicted keff , is estimated based on an existing gamma ray energy spectrum. Practical measurement method for the gamma ray from nuclides in the PCV and the fuel debris canister gas is proposed.