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DOE OSTI · 2323931

3D full core BEAVRS using OpenMOC with transport equivalence

Giudicelli, Guillaume Louis·Smith, Kord·Forget, Benoit
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Abstract

Using an optimized implementation of the three-dimension method of characteristics for neutron transport, as well as a novel equivalence method for transport calculations de- signed to recover self-shielding errors from neglecting the angular dependence of reso- nant group absorption, a 3D full core light water reactor hybrid stochastic-deterministic eigenvalue calculation was achieved. This paper presents the optimizations developed and compares the transport solutions obtained. It realizes a runtime near 6,000 CPU hours for the statepoint, an improvement of an order of magnitude on previous works, with less than 1% error on pin fission/U-238 capture ratios and a few dozen pcms on the eigenvalue.

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22 GENERAL STUDIES OF NUCLEAR REACTORS3D MOC97 MATHEMATICS AND COMPUTINGDiscontinuity factorsEquivalenceFull core

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Giudicelli, Guillaume Louis, Smith, Kord, Forget, Benoit. 2023-08-15. 3D full core BEAVRS using OpenMOC with transport equivalence. https://www.osti.gov/biblio/2323931

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