Determining the nuclear data uncertainty on MONK10 and WIMS10 criticality calculations

The ANSWERS Software Service is developing a number of techniques to better understand and quantify uncertainty on calculations of the neutron multiplication factor, k-effective, in nuclear fuel and other systems containing fissile material. The uncertainty on the calculated k-effective arises from...

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Bibliographic Details
Main Authors:	Ware, Tim, Dobson, Geoff, Hanlon, David, Hiles, Richard, Mason, Robert, Perry, Ray
Format:	Conference Proceeding
Language:	eng
Subjects:	Computer simulation Covariance Hypercubes Latin hypercube sampling Libraries Mathematical models Monte Carlo simulation Nuclear fuels Reactor physics System effectiveness Tolerances Uncertainty
Online Access:	Get full text
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Summary:	The ANSWERS Software Service is developing a number of techniques to better understand and quantify uncertainty on calculations of the neutron multiplication factor, k-effective, in nuclear fuel and other systems containing fissile material. The uncertainty on the calculated k-effective arises from a number of sources, including nuclear data uncertainties, manufacturing tolerances, modelling approximations and, for Monte Carlo simulation, stochastic uncertainty. For determining the uncertainties due to nuclear data, a set of application libraries have been generated for use with the MONK10 Monte Carlo and the WIMS10 deterministic criticality and reactor physics codes. This paper overviews the generation of these nuclear data libraries by Latin hypercube sampling of JEFF-3.1.2 evaluated data based upon a library of covariance data taken from JEFF, ENDF/B, JENDL and TENDL evaluations. Criticality calculations have been performed with MONK10 and WIMS10 using these sampled libraries for a number of benchmark models of fissile systems. Results are presented which show the uncertainty on k-effective for these systems arising from the uncertainty on the input nuclear data.
ISSN:	2100-014X 2101-6275 2100-014X