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OECD/NEA intercomparison of deterministic and monte carlo cross-section sensitivity codes using sneak-7 benchmarks

I Kodeli 1 V. Mastrangelo 2 E. Ivanov 3 A. Aures 4 W. Zwermann 4 M. Aufiero 5 Y. Peneliau 6 K. Ivanov 7 E. Sartori 8
1 IJS - Jozef Stefan Institute [Ljubljana]
2 IPNO - Institut de Physique Nucléaire d'Orsay
3 IRSN - Institut de Radioprotection et de Sûreté Nucléaire
4 Physik Department [Garching]
5 University of California
6 CEA-DES (ex-DEN) - CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire)
7 North Carolina A&T State University
8 OECD - International Migration Division
Abstract : A sensitivity benchmark exercise was organized within the scope of the Uncertainty Analysis in Modeling (UAM) project of the OECD/Nuclear Energy Agency (NEA) to develop and compare methods for the sensitivity and uncertainty computations of the effective multiplication factor (keff) and the effective delayed neutron fraction (eff). Several solutions were received using different codes, both deterministic (SUSD3D, SNATCH) and Monte Carlo (TSUNAMI-3D, XSUSA, SERPENT2, MCNP6). In this paper the performances of several codes and methods for the keff sensitivity and uncertainty computations are intercompared. The sensitivity and uncertainty codes were applied to the SNEAK-7A and -7B fast neutron benchmark experiments from the IRPhE database. Good general agreement between the sensitivities, both for integral values and sensitivity profiles, was observed.
Keywords : nuclear data benchmark experiments sensitivity-uncertainty analysis
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I Kodeli, V. Mastrangelo, E. Ivanov, A. Aures, W. Zwermann, et al.. OECD/NEA intercomparison of deterministic and monte carlo cross-section sensitivity codes using sneak-7 benchmarks. PHYSOR 2016: Unifying Theory and Experiments in the 21st Century, May 2016, Sun Valley, United States. pp.ISBN: 978-0-89448-726-2. ⟨cea-02431813⟩

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