DEVELOPMENT OF A LABR3 SCINTILLATION DETECTOR SYSTEM FOR NEUTRON RESONANCE DENSITOMETRY (NRD)

Year
2014
Author(s)
Michio Seya - Japan Atomic Energy Agency
Masatoshi Kureta - Japan Atomic Energy Agency
Hideo Harada - Japan Atomic Energy Agency
Fumito Kitatani - Japan Atomic Energy Agency
Mitsuo Koizumi - Japan Atomic Energy Agency
Harufumi Tsuchiya - Japan Atomic Energy Agency
Hideki Iimura - Japan Atomic Energy Agency
Atsushi Kimura - Japan Atomic Energy Agency
Peter Schillebeeckx - Institute for Reference Materials and Measurements
Abstract
We have proposed neutron resonance densitometry (NRD) as a method to quantify special nuclear materials in particle-like debris of melted fuel. NRD is a combination of neutron resonance transmission analysis (NRTA), and neutron resonance capture analysis (NRCA) (and prompt ?-ray analysis (PGA)). NRCA/PGA is used to identify contaminant elements, which is difficult to be detected by NRTA. To observe ? rays emitted in neutron capture reaction, a spectrometer consisting of LaBr3 scintillation detectors has been constructed. A newly installed data acquisition system enables us to measure 500k event/s for each 8-channel inputs. Test experiments of the spectrometer system are in progress for the demonstration experiment of NRD.