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dc.contributor.author
Roubtsov, D.
dc.contributor.author
Chow, J. C.
dc.contributor.author
Marquez Damian, Jose Ignacio
dc.contributor.author
Granada, Jose Rolando
dc.date.available
2019-01-16T19:50:37Z
dc.date.issued
2017-12-01
dc.identifier.citation
Roubtsov, D.; Chow, J. C.; Marquez Damian, Jose Ignacio; Granada, Jose Rolando; Application of the CAB evaluation of thermal scattering law for heavy water to ZED-2 critical benchmarks at room temperature; Pergamon-Elsevier Science Ltd; Annals of Nuclear Energy; 110; 1-12-2017; 958-972
dc.identifier.issn
0306-4549
dc.identifier.uri
http://hdl.handle.net/11336/68157
dc.description.abstract
To improve the evaluations in thermal scattering sub-libraries, a set of thermal neutron scattering cross sections (scattering kernels) was developed recently at Centro Atómico Bariloche (CAB) for deuterium and oxygen bound in liquid heavy water, and made available in the ENDF-6 format. These libraries are based on a combination of results of molecular dynamics (MD) simulations and recent experimental data and, when used, result in an improvement of calculations of observables of single neutron scattering experiments, compared to results based on previous evaluations. In this work, we provide additional details on the CAB evaluation of heavy water at room temperature and discuss the important integral characteristics of neutron scattering kernels, such as the cross sections, average scattering cosine, and average secondary energy. Then, the new set of thermal scattering kernels is applied in modelling criticality of the ZED-2 reactor, and the international benchmarks LEU-MET-THERM-003 (ICSBEP handbook) and ZED2-HWR-EXP-001 (IRPhEP handbook) are analyzed in detail. The differences in the estimates of criticality due to changes in the S(α,β) data from the reference one (ENDF/B-VII) to the CAB evaluation are 100–200 pcm; they are comparable but smaller than the ZED-2 benchmark uncertainties (≈±300 pcm). Changing the reference evaluation of 16O to the recently developed one from the CIELO project (WPEC subgroup 40) results in a decrease of criticality by ∼100 pcm. Using different combinations of the improved nuclear data for deuterium, oxygen, and the CAB TSL model, we obtain biases up to 300–400 pcm in the estimates of criticality of the selected ZED-2 benchmarks. Application of the new evaluations for 235U and 238U from the CIELO project improves the estimates of keff by decreasing the bias by ∼100 pcm that indicates a need for further investigations of the ZED-2 critical assemblies.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-Elsevier Science Ltd
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Evaluated Nuclear Data Libraries
dc.subject
Heavy Water
dc.subject
International Benchmarks
dc.subject
Nuclear Data
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Thermal Neutron Scattering
dc.subject
Zed-2 Reactor
dc.subject.classification
Ingeniería Mecánica
dc.subject.classification
Ingeniería Mecánica
dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
dc.title
Application of the CAB evaluation of thermal scattering law for heavy water to ZED-2 critical benchmarks at room temperature
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-01-14T14:18:24Z
dc.journal.volume
110
dc.journal.pagination
958-972
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Nueva York
dc.description.fil
Fil: Roubtsov, D.. Canadian Nuclear Laboratories; Canadá
dc.description.fil
Fil: Chow, J. C.. Canadian Nuclear Laboratories; Canadá
dc.description.fil
Fil: Marquez Damian, Jose Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Gerencia de Ingeniería Nuclear (CAB). División Neutrones y Reactores; Argentina
dc.description.fil
Fil: Granada, Jose Rolando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comision Nacional de Energia Atomica. Gerencia D/area de Energia Nuclear. Gerencia de Ingeniería Nuclear (cab). Div.física de Reactores Avanzados; Argentina
dc.journal.title
Annals of Nuclear Energy
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0306454917302207
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.anucene.2017.07.034
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