Bibliographic Citation
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| Title | Extending the direct statistical approach to include particle bifurcation between the splitting surfaces |
| Creator/Author | Burn, K.W. [ENEA, Bologna (Italy)] |
| Publication Date | 1995 Jan 01 |
| OSTI Identifier | OSTI ID: 46147 |
| Other Number(s) | Journal ID: NSENAO; ISSN 0029-5639; TRN: TRN: IM9522%%148 |
| Resource Type | Journal Article |
| Resource Relation | Journal Name: Nuclear Science and Engineering; Journal Volume: 119; Journal Issue: 1; Other Information: PBD: Jan 1995 |
| Subject | 66 PHYSICS; TRANSPORT THEORY; MONTE CARLO METHOD; MATHEMATICAL MODELS; NEUTRON REACTIONS; ALGORITHMS |
| Description/Abstract | The Direct Statistical Approach (DSA) to surface splitting and Russian Roulette (RR) is one of the current routes toward automatism in Monte Carlo and is currently applied to fixed source particle transport problems. A general volumetric particle bifurcation capability has been inserted into the Direct Statistical Approach (DSA) surface parameter and cell models. The resulting extended DSA describes the second moment and time functions in terms of phase-space surface splitting/Russian roulette parameters (surface parameter model) or phase-space cell importances (cell model) in the presence of volumetric particle bifurcations including both natural events [such as (n,xn) or gamma production from neutron collisions] and artificial events (such as DXTRAN). At the same time, other limitations in the DSA models (concerning tally scores direct from the source and tracks surviving an event at which a tally score occurs) are removed. Given the second moment and time functions, the foregoing surface or cell parameters may then be optimized. |
| Country of Publication | United States |
| Language | English |
| Format | Medium: X; Size: pp. 44-79 |
| System Entry Date | 2009 Dec 16 |
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