Evaluation of Fixed Absorber Reactivity Measurement in the Prototype Fast Reactor Monju

In the prototype fast breeder reactor Monju, fixed absorber worth was measured as the difference of core reactivity measured by control rod worth between cores with and without a single fixed absorber or three fixed absorbers. In this paper, the measurements are evaluated in detail, and their reliab...

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Bibliographic Details
Published inNuclear technology Vol. 207; no. 12; pp. 1810 - 1820
Main Authors Ohgama, Kazuya, Katagiri, Hiroki, Takegoshi, Atsushi, Hazama, Taira
Format Journal Article
LanguageEnglish
Published La Grange Park Taylor & Francis 02.12.2021
American Nuclear Society
Subjects
fixed absorber
neutronics
prototype fast reactor Monju
Sodium fast reactor
validation
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Summary:In the prototype fast breeder reactor Monju, fixed absorber worth was measured as the difference of core reactivity measured by control rod worth between cores with and without a single fixed absorber or three fixed absorbers. In this paper, the measurements are evaluated in detail, and their reliability and usefulness as validation data are investigated through a comparison with calculations using the latest neutronics design methodology developed at Japan Atomic Energy Agency. Calculated-to-experiment values and their uncertainties of fixed absorber worth were 1.00 ± 0.05 and 1.02 ± 0.04, respectively. Through this study, the measurements and calculations were found consistent and reliable.
ISSN:0029-5450
1943-7471
DOI:10.1080/00295450.2020.1846481