Reduction of Delayed-Neutron Contribution to Variance-to-Mean Raito by Application of Difference Filter Technique
The difference-filtering correlation analysis was applied to time-sequence neutron count data measured in a slightly subcritical assembly, where the Feynman-α analysis suffered from large contribution of delayed neutron to the variance-to-mean ratio of counts. The prompt-neutron decay constant infer...
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Published in | Journal of nuclear science and technology Vol. 36; no. 7; p. 555 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Tokyo
Taylor & Francis Ltd
01.07.1999
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Online Access | Get full text |
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Summary: | The difference-filtering correlation analysis was applied to time-sequence neutron count data measured in a slightly subcritical assembly, where the Feynman-α analysis suffered from large contribution of delayed neutron to the variance-to-mean ratio of counts. The prompt-neutron decay constant inferred from the present filtering analysis agreed very closely with that by pulsed neutron experiment, and no dependence on the gate-time range specified could be observed. The 1st-order was sufficient for the reduction of the delayed-neutron contribution. While the conventional method requires a choice of analysis formula appropriate to a gate-time range, the present method is applicable to a wide variety of gate-time ranges. |
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ISSN: | 0022-3131 1881-1248 |
DOI: | 10.3327/jnst.36.555 |