2019年2月1日
Experimental study of neutron counting in a zero-power reactor driven by a neutron source inherent in highly enriched uranium fuels
Journal of Nuclear Science and Technology
- ,
- ,
- ,
- 巻
- 56
- 号
- 2
- 開始ページ
- 254
- 終了ページ
- 259
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1080/00223131.2018.1558131
- 出版者・発行元
- TAYLOR & FRANCIS LTD
© 2018, © 2018 Atomic Energy Society of Japan. All rights reserved. Even a zero-power reactor core containing highly enriched uranium has a weak neutron source inherent in uranium 235, and consequently, a neutron counter placed closely to the core without external neutron source registers a certain counting rate. The study of the counting is very important for zero-power reactor physics experiments with a high precision. In this experimental study, first, at a shutdown state of the UTR-Kinki reactor without start-up neutron source, a pulse height distribution of output signals from a neutron proportional counter was measured to confirm that these signals resulted from neutron detections. At several subcritical states of the UTR, then, the Feynman-α analysis was carried out to confirm that the neutrons detected by the counter must be fission neutrons multiplied by fission chain reactions. The correlation amplitude measured in the Feynman-α analysis was much higher than that measured in a previous drive by start-up source. Further, it was also confirmed that the subcriticality dependence of neutron counting rate followed the source multiplication formula. This feature indicated that the one-point model was very successful in the subcritical range including the shutdown state.
- リンク情報
-
- DOI
- https://doi.org/10.1080/00223131.2018.1558131
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000507636200001&DestApp=WOS_CPL
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85058692375&origin=inward
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85058692375&origin=inward
- ID情報
-
- DOI : 10.1080/00223131.2018.1558131
- ISSN : 0022-3131
- eISSN : 1881-1248
- SCOPUS ID : 85058692375
- Web of Science ID : WOS:000507636200001