[2D13-17] Critical Experiment Facility

4:20 PM - 4:35 PM JST(7:20 AM - 7:35 AM UTC)

[2D16] Modification of STACY for the study of criticality characteristics of fuel debris(18) Thermal Power Calibration

*Shouhei Araki¹, Takahiko Murakami¹, Yutaka Kamikawa¹, Yu Arakaki¹, Yuta Tada¹, Eiju Aizawa¹, Masakazu Seki¹, Junichi Ishii¹, Kazuhiko Izawa¹, Satoshi Gunji¹ (1. Japan Atomic Energy Agency)

Keywords:

STACY,Thermal power calibration,Activation method,MVP,PHITS

We conducted thermal power measurements and thermal power calibration for a performance test in the modified STACY. The activation method was adopted in the thermal power measurements. The core for the measurements consisted of 253 fuel rods and a sample driver. The gold foils used for the activation foil method were installed in the sample driver. The operation was carried out twice, at 20-W and 50-W. The neutron flux in the core and the response of the gold foil were calculated using MVP and PHITS, respectively, with JENDL-5 as the nuclear data. In each measurement, the integrated power was 4.2-Wh and 8.9-Wh, respectively. The indicated power with default setting was found to be about 50% higher than the evaluated value.