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

I A. 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 UC - 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

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: sensitivity-uncertainty analysis; nuclear data; benchmark experiments

Domains: Nuclear Experiment [nucl-ex]; Nuclear Theory [nucl-th]

I A. 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⟩