Issue |
EPJ Web of Conferences
Volume 122, 2016
CNR*15 - 5th International Workshop on Compound-Nuclear Reactions and Related Topics
|
|
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Article Number | 01005 | |
Number of page(s) | 11 | |
Section | Nuclear Fission | |
DOI | https://doi.org/10.1051/epjconf/201612201005 | |
Published online | 21 June 2016 |
https://doi.org/10.1051/epjconf/201612201005
Fission cross-sections, prompt fission neutron and γ-ray emission in request for nuclear applications
1 EC-JRC-IRMM, Retieseweg 111, B-2440 Geel, Belgium
2 National Physical Laboratory, Hampton Road, Teddington, Middlesex, UK, TW11 0LW
Published online: 21 June 2016
In recent years JRC-IRMM has been investigating fission cross-sections of 240,242Pu in the fast-neutron energy range relevant for innovative reactor systems and requested in the High Priority Request List (HPRL) of the OECD/Nuclear Energy Agency (NEA). In addition to that, prompt neutron multiplicities are being investigated for the major isotopes 235U, 239Pu in the neutron-resonance region using a newly developed scintillation detector array (SCINTIA) and an innovative modification of the Frisch-grid ionisation chamber for fission-fragment detection. These data are highly relevant for improved neutron data evaluation and requested by the OECD/Working Party on Evaluation Cooperation (WPEC). Thirdly, also prompt fission γ-ray emission is investigated using highly efficient lanthanide-halide detectors with superior timing resolution. Again, those data are requested in the HPRL for major actinides to solve open questions on an under-prediction of decay heat in nuclear reactors. The information on prompt fission neutron and γ-ray emission is crucial for benchmarking nuclear models to study the de-excitation process of neutron-rich fission fragments. Information on γ-ray emission probabilities is also useful in decommissioning exercises on damaged nuclear power plants like Fukushima Daiichi to which JRC-IRMM is contributing. The results on the 240,242Pu fission cross section, 235U prompt neutron multiplicity in the resonance region and correlations with fission fragments and prompt γ-ray emission for several isotopes will be presented and put into perspective.
© The Authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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