Title:
A critical controlling method of a management subject
Document Type and Number:
Japanese Patent JP6257129
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To enable criticality safety management in consideration to existence of an included non-nuclear fuel material.SOLUTION: A criticality management method of a management target is configured to: measure a γ-ray generated by a neutron capture reaction of a measurement object nuclide discharged from the management object including a radioactive nuclide and a measurement object nuclide generating a neutron capture reaction and a γ-ray generated by a nuclear fission reaction of a nuclear fuel nuclide; calculate a neutron capture reaction rate of the measurement object nuclide on the basis of a measurement value of the γ-ray generated by the neutron capture reaction; calculate a nuclear fission rate of the nuclear fuel on the basis of the measurement value of a γ-ray generated by a nuclear fission reaction; calculate a ratio between the neutron capture reaction rate and the nuclear fission rate; and use the ratio to calculate a neutron infinite multiplication factor evaluation value in consideration to reduction in the measurement object nuclide by the neutron capture reaction and perform the criticality management.
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Inventors:
Yasushi Nanai
Application Number:
JP2012168709A
Publication Date:
January 10, 2018
Filing Date:
July 30, 2012
Export Citation:
Assignee:
Central Research Institute of Electric Power Industry
International Classes:
G21C17/06; G21C19/40
Domestic Patent References:
| JP2001249197A | ||||
| JP2001147289A | ||||
| JP6214038A |
Foreign References:
| US20070076839 |
Attorney, Agent or Firm:
Kazumi Murase