Propagation of Cross-Section Uncertainties in Criticality Calculations in the Framework of UAM-Phase I Using MCNPX-2.7e and SCALE-6.1

Diez de la Obra, Carlos Javier and Herrero Carrascosa, José Javie and Cabellos de Francisco, Oscar Luis and Martínez, J.S. (2013). Propagation of Cross-Section Uncertainties in Criticality Calculations in the Framework of UAM-Phase I Using MCNPX-2.7e and SCALE-6.1. "Science and Technology of Nuclear Installations", v. 2013 (n. null); pp. 1-10. ISSN 1687-6075. https://doi.org/10.1155/2013/380284.

Description

Title: Propagation of Cross-Section Uncertainties in Criticality Calculations in the Framework of UAM-Phase I Using MCNPX-2.7e and SCALE-6.1
Author/s:
  • Diez de la Obra, Carlos Javier
  • Herrero Carrascosa, José Javie
  • Cabellos de Francisco, Oscar Luis
  • Martínez, J.S.
Item Type: Article
Título de Revista/Publicación: Science and Technology of Nuclear Installations
Date: 2013
ISSN: 1687-6075
Volume: 2013
Subjects:
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Nuclear [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

In the framework of the OECD/NEA project on Benchmark for Uncertainty Analysis in Modeling (UAM) for Design, Operation, and Safety Analysis of LWRs, several approaches and codes are being used to deal with the exercises proposed in Phase I, “Specifications and Support Data for Neutronics Cases.” At UPM, our research group treats these exercises with sensitivity calculations and the “sandwich formula” to propagate cross-section uncertainties. Two different codes are employed to calculate the sensitivity coefficients of to cross sections in criticality calculations: MCNPX-2.7e and SCALE-6.1. The former uses the Differential Operator Technique and the latter uses the Adjoint-Weighted Technique. In this paper, the main results for exercise I-2 “Lattice Physics” are presented for the criticality calculations of PWR. These criticality calculations are done for a TMI fuel assembly at four different states: HZP-Unrodded, HZP-Rodded, HFP-Unrodded, and HFP-Rodded. The results of the two different codes above are presented and compared. The comparison proves a good agreement between SCALE-6.1 and MCNPX-2.7e in uncertainty that comes from the sensitivity coefficients calculated by both codes. Differences are found when the sensitivity profiles are analysed, but they do not lead to differences in the uncertainty.

More information

Item ID: 26169
DC Identifier: http://oa.upm.es/26169/
OAI Identifier: oai:oa.upm.es:26169
DOI: 10.1155/2013/380284
Official URL: http://www.hindawi.com/journals/stni/2013/380284/
Deposited by: Memoria Investigacion
Deposited on: 19 Jan 2015 16:07
Last Modified: 19 Jan 2015 16:07
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