TAILIEUCHUNG - Uncertainties for Swiss LWR spent nuclear fuels due to nuclear data

This paper presents a study of the impact of the nuclear data (cross sections, neutron emission and spectra) on different quantities for spent nuclear fuels (SNF) from Swiss power plants: activities, decay heat, neutron and gamma sources and isotopic vectors. | Uncertainties for Swiss LWR spent nuclear fuels due to nuclear data EPJ Nuclear Sci. Technol. 4 6 2018 Nuclear Sciences . Rochman et al. published by EDP Sciences 2018 amp Technologies https epjn 2018005 Available online at https REGULAR ARTICLE Uncertainties for Swiss LWR spent nuclear fuels due to nuclear data Dimitri A. Rochman Alexander Vasiliev Abdelhamid Dokhane and Hakim Ferroukhi Laboratory for Reactor Physics Systems Behaviour Paul Scherrer Institut Villigen Switzerland Received 27 October 2017 Accepted 14 March 2018 Abstract. This paper presents a study of the impact of the nuclear data cross sections neutron emission and spectra on different quantities for spent nuclear fuels SNF from Swiss power plants activities decay heat neutron and gamma sources and isotopic vectors. Realistic irradiation histories are considered using validated core follow-up models based on CASMO and SIMULATE. Two Pressurized and one Boiling Water Reactors PWR and BWR are considered over a large number of operated cycles. All the assemblies at the end of the cycles are studied being reloaded or finally discharged allowing spanning over a large range of exposure from 4 to 60 MWd kgU for 9200 assembly-cycles . Both UO2 and MOX fuels were used during the reactor cycles with enrichments from to for the UO2 and to Pu for the MOX. The SNF characteristics presented in this paper are calculated with the SNF code. The calculated uncertainties based on the ENDF library are obtained using a simple Monte Carlo sampling method. It is demonstrated that the impact of nuclear data is relatively important . up to 17 for the decay heat showing the necessity to consider them for safety analysis of the SNF handling and disposal. 1 Introduction stored close to one two or more of the same canister underground for a certain time . Ref. 2 . Some of the The safe handling and storage of spent nuclear fuels SNF relevant quantities for storage .

• Năng lượng
• Impact of the nuclear data
• Neutron emission and spectra
• Spent nuclear fuels
• Swiss power plants
• LWR spent nuclear fuels
• Traditional adjoint method
• Impact of ND
• Impact of correlations
• Evaluation of nuclear data
• Material testing reactors