Reduction of Delayed-Neutron Contribution to Variance-to-Mean Ratio 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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| Veröffentlicht in: | Journal of nuclear science and technology 1999-07, Vol.36 (7), p.555-559 |
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| container_end_page | 559 |
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| container_issue | 7 |
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| container_title | Journal of nuclear science and technology |
| container_volume | 36 |
| creator | HASHIMOTO, Kengo MOURI, Tomoaki OHTANI, Nobuo |
| description | 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 filtering 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. |
| doi_str_mv | 10.1080/18811248.1999.9726238 |
| format | Article |
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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 filtering 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.</description><identifier>ISSN: 0022-3131</identifier><identifier>EISSN: 1881-1248</identifier><identifier>DOI: 10.1080/18811248.1999.9726238</identifier><identifier>CODEN: JNSTAX</identifier><language>eng</language><publisher>Tokyo: Taylor & Francis</publisher><subject>Applied sciences ; data analysis ; DCA ; delayed neutrons ; difference filter ; difference filtering analysis ; Energy ; Energy. 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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 filtering 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.</description><subject>Applied sciences</subject><subject>data analysis</subject><subject>DCA</subject><subject>delayed neutrons</subject><subject>difference filter</subject><subject>difference filtering analysis</subject><subject>Energy</subject><subject>Energy. Thermal use of fuels</subject><subject>Exact sciences and technology</subject><subject>Feynman-alpha analysis</subject><subject>Fission nuclear power plants</subject><subject>Installations for energy generation and conversion: thermal and electrical energy</subject><subject>neutron correlation analysis</subject><subject>prompt-neutron decay constant</subject><subject>slightly subcritical</subject><subject>subcriticality</subject><subject>time-sequence data</subject><subject>variance-to-mean ratio</subject><issn>0022-3131</issn><issn>1881-1248</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1999</creationdate><recordtype>article</recordtype><recordid>eNp9UFtLwzAUDqLgnP4EIQ--dubWtHlzTKfCVBjT15KkCUa6pqYp0n9v6zZ98-lwvtvhfABcYjTDKEfXOM8xJiyfYSHETGSEE5ofgcmIJyNxDCYIEZJQTPEpOGvbj2HljOcT8Lk2Zaej8zX0Ft6aSvamTJ5NF8MALXwdg1PdDx89fJPByVqbJPrkycgaruVAQdXDedNUTsvfIGetCWaQwqWroglwY_R77T47cw5OrKxac7GfU_C6vNssHpLVy_3jYr5KNEMiJinjinJaKpbjjKiU4gwrlYqMMoYpEbjkokxTpYhRpNRWcSQs04hxLjXTGZ2CdJerg2_bYGzRBLeVoS8wKsbeikNvxdhbse9t8F3tfI1staxsGB527Z9ZEJEhPMhudjJXWx-28suHqiyi7CsfDh76_6VvipiCJw</recordid><startdate>19990701</startdate><enddate>19990701</enddate><creator>HASHIMOTO, Kengo</creator><creator>MOURI, Tomoaki</creator><creator>OHTANI, Nobuo</creator><general>Taylor & Francis</general><general>Atomic Energy Society of Japan</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>19990701</creationdate><title>Reduction of Delayed-Neutron Contribution to Variance-to-Mean Ratio by Application of Difference Filter Technique</title><author>HASHIMOTO, Kengo ; MOURI, Tomoaki ; OHTANI, Nobuo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c409t-546b363db48172b53171bb59734413291d69d55bb2eb2dcfb609f4c0466ac4c73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1999</creationdate><topic>Applied sciences</topic><topic>data analysis</topic><topic>DCA</topic><topic>delayed neutrons</topic><topic>difference filter</topic><topic>difference filtering analysis</topic><topic>Energy</topic><topic>Energy. Thermal use of fuels</topic><topic>Exact sciences and technology</topic><topic>Feynman-alpha analysis</topic><topic>Fission nuclear power plants</topic><topic>Installations for energy generation and conversion: thermal and electrical energy</topic><topic>neutron correlation analysis</topic><topic>prompt-neutron decay constant</topic><topic>slightly subcritical</topic><topic>subcriticality</topic><topic>time-sequence data</topic><topic>variance-to-mean ratio</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>HASHIMOTO, Kengo</creatorcontrib><creatorcontrib>MOURI, Tomoaki</creatorcontrib><creatorcontrib>OHTANI, Nobuo</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Journal of nuclear science and technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>HASHIMOTO, Kengo</au><au>MOURI, Tomoaki</au><au>OHTANI, Nobuo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Reduction of Delayed-Neutron Contribution to Variance-to-Mean Ratio by Application of Difference Filter Technique</atitle><jtitle>Journal of nuclear science and technology</jtitle><date>1999-07-01</date><risdate>1999</risdate><volume>36</volume><issue>7</issue><spage>555</spage><epage>559</epage><pages>555-559</pages><issn>0022-3131</issn><eissn>1881-1248</eissn><coden>JNSTAX</coden><abstract>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 filtering 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.</abstract><cop>Tokyo</cop><pub>Taylor & Francis</pub><doi>10.1080/18811248.1999.9726238</doi><tpages>5</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Journal of nuclear science and technology, 1999-07, Vol.36 (7), p.555-559 |
| issn | 0022-3131 1881-1248 |
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| subjects | Applied sciences data analysis DCA delayed neutrons difference filter difference filtering analysis Energy Energy. Thermal use of fuels Exact sciences and technology Feynman-alpha analysis Fission nuclear power plants Installations for energy generation and conversion: thermal and electrical energy neutron correlation analysis prompt-neutron decay constant slightly subcritical subcriticality time-sequence data variance-to-mean ratio |
| title | Reduction of Delayed-Neutron Contribution to Variance-to-Mean Ratio by Application of Difference Filter Technique |
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