[1A06-13] Contamination Measurement Techniques

3:15 PM - 3:30 PM JST(6:15 AM - 6:30 AM UTC)

[1A08] Development of analysis and estimation techniques to determine the properties of fuel debris(3) Development of passive neutron technique

*Natsumi Mitsuboshi¹, Taketeru Nagatani¹, Yoshihiro Kosuge², Toyofumi Okada¹ (1. JAEA, 2. NESI)

Keywords:

Fukushima Daiichi Nuclear Power Station,Fuel debris,Nondestructive measurement,Passive neutron method

This report describes the results of applicability evaluation of the passive neutron technique for determination of the properties of fuel debris or classification of fuel debris and waste of Fukushima Daiichi Nuclear Power Station. The experiment and simulation revealed the effect of neutron absorber and moderator on neutron counts. The applicability of Pu mass evaluation based on the difference of half-life of Cm-244 and Pu nuclides was also evaluated by the experiment and simulation.