2013 Fiscal Year Final Research Report
Study on the Delayed Neutron Nuclear Data for Analysis of Accelerator-Driven Reactor Dynamics
| Project/Area Number |
23561016
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Nuclear engineering
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| Research Institution | Kinki University |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2013
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| Keywords | 加速器駆動未臨界炉 / 遅発中性子 / 核データ / アクチニド核種 / 核分裂収率 / 遅発中性子放出確率 / 先行核 |
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| Research Abstract |
Evaluation methods for the delayed neutron yield (DNY) data for actinides for use in the analysis of dynamics of an accelerator-driven system were studied. The findings are the following: (1) The DNY calculated with summation method showed an exponential decrease similar to the one observed in experiments as we go to heavier actinides; (2) Two different sets of DN emission probability led to calculated results several times discrepant in magnitude; (3) More than 90% of contribution to the total DNY comes from major 20 precursors. This implies importance of improving accuracy of DN emission probability for these precursors; (4)At higher energies the DNY tends to decrease, the degree of which depends on prompt neutron multiplicity and proton even-odd effects of precursors.
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