CUED Publications database

Acceleration of surface tracking in Monte Carlo transport via distance caching

Kowalski, MA and Cosgrove, PM (2021) Acceleration of surface tracking in Monte Carlo transport via distance caching. Annals of Nuclear Energy, 152. ISSN 0306-4549

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Abstract

A modification to the surface tracking algorithm commonly employed in Monte Carlo neutral particle transport is suggested. As nuclear reactor simulations often have multiple nested geometry levels, surface tracking algorithms must perform distance checks on each level to determine the distance to the closest surface. A simple optimisation to this procedure (which does not appear to have been previously proposed) is to store and decrement the distance to the boundary on each level during a particle flight, removing extraneous and relatively expensive distance calculations. This modified algorithm is implemented in the Monte Carlo code SCONE and compared against the standard surface tracking implementation, showing a favourable speed-up in the range of 7–20% for realistic Monte Carlo assembly geometries.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 13 Jan 2021 21:37
Last Modified: 06 Apr 2021 01:46
DOI: 10.1016/j.anucene.2020.108002