Memorial-Index-Based Inverse Kinetics Method for Continuous Measurement of Reactivity and Source Strength

A new neutron inverse kinetics method has been proposed to compute both reactivity and source strength using only noise-containing reactor power signals in a subcritical state. The method is applicable to cases when the effective source strength varies with a change in reactivity. A newly defined ki...

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Bibliographic Details
Published inJournal of nuclear science and technology Vol. 37; no. 1; pp. 53 - 59
Main Authors KITANO, Akihiro, ITAGAKI, Masafumi, NARITA, Masakuni
Format Journal Article
LanguageEnglish
Published Tokyo Taylor & Francis Group 01.01.2000
Atomic Energy Society of Japan
Subjects
Applied sciences
delayed neutrons
effective source strength
Energy
Energy. Thermal use of fuels
Exact sciences and technology
inverse neutron kinetics
Memorial Index
Metering, regulation, automation in energy
noise
reactivity
subcritical
the grouping method
Theoretical studies. Data and constants. Metering
Measurement
Neutron source
Kinetic method
Reactivity
Nuclear reactor
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Summary:A new neutron inverse kinetics method has been proposed to compute both reactivity and source strength using only noise-containing reactor power signals in a subcritical state. The method is applicable to cases when the effective source strength varies with a change in reactivity. A newly defined kinetics parameter, "Memorial Index", is introduced to detect properly the start and end of a transient and to exclude time intervals that are ill-posed for numerical source strength estimation analysis based on the grouping method. Results for a numerical simulation analysis demonstrate that the revised analytic procedure incorporated with the Memorial Index enables one to continuously calculate precise values of both source strength and reactivity during a complicated subcriticality transient.
ISSN:0022-3131
1881-1248
DOI:10.1080/18811248.2000.9714866