Experimental validation of unique combination numbers for third- and fourth-order neutron correlation factors of zero-power reactor noise
Experimental validation of unique combination numbers for third- and fourth-order neutron correlation factors of zero-power reactor noise
复制标题
零功率反应堆噪声三阶和四阶中子相关因子唯一组合数的实验验证
DOI:
10.1080/00223131.2019.1580625
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发表时间:
2019
影响因子:
1.2
通讯作者:
Cheol Ho Pyeon
中科院分区:
文献类型:
--
作者:
Tomohiro Endo;Akio Yamamoto;Masao Yamanaka;Cheol Ho Pyeon
Zero-power reactor noise is useful for subcriticality measurements. Based on the nuclear reactor physics and the theory of neutron detection, this paper theoretically clarifies that the third- and fourth-order neutron correlation factorsandcan be expressed as functions of the second-order neutron correlation factor. In particular, if the neutron-counting gate width is sufficiently large, the saturation valuesandare almost equal to the unique combination numbers, ‘3’ and ‘15,’ for a source-driven subcritical system, where the subcriticality is less than 10,000 pcm. These unique combination numbers, ‘3’ and ‘15,’ forandwere validated using actual zero-power reactor noise measurements carried out at the Kyoto University Criticality Assembly. In this study, the estimation of statistical errors and correlations between different gate widths owing to the bunching method was achieved by the moving block bootstrap method. For a sufficiently long measured reactor noise in a steady and unperturbed state, a statistical test for the evaluation of the critical state and the absolute measurement of subcriticality can be carried out by statistically quantifying the difference between the measurement value ofand the unique combination number.
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影响因子:
1.9
作者:
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通讯作者:
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T. Higgins
DOI:
--
发表时间:
2002
期刊:
--
影响因子:
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