中性子同時計数に基づく、ウラン・プルトニウム溶液系プルトニウム濃度推算方法およびモニタリングシステム

Japanese Patent JP7083421

B2

An estimation method and a monitoring system for a plutonium concentration in a uranium plutonium solution system is based on neutron coincidence counting. Corrections are performed of the neutron multiplication absorption effect of the spectrum difference between source neutrons and spontaneous fission source neutrons, and of the detection efficiency difference between induced fission neutrons and spontaneous fission source neutrons on a point model equation set. The calculated results of neutron coincidence counting by an improved point model equation set can accurately reflect a measurement result of neutron coincidence counting of a neutron detection system outside the uranium plutonium solution system.

Shao increase
Yang Hai Peak
Yuan
Zhao Zhao
于▲ミョウ▼
Display
易▲セン▼
Hu Xiao Li
Lee Yunlong

JP2021082657A

June 10, 2022

May 14, 2021

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China Nuclear Power Engineering Co.,Ltd.

G01T1/167; G01T3/00; G21C17/00; G21C19/46

S. Croft et al.,Incorporating delayed neutrons into the point-model equations routinely used for neutron coincidence counting in nuclear safeguards,Annals of Nuclear Energy,2016年09月21日,volume 99,pages 36-39
D. M. Cifarelli et al.,Models for a three-parameter analysis of neutron signal correlation measurements for fissile material assay,Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment,1986年11月01日,volume 251, issue 3,pages 550-563

Hideki Miyata
Hiroaki Sakai

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