MCNP Perturbation Technique for Criticality Analysis
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
The differential operator perturbation technique has been incorporated into the Monte Carlo N-Particle transport code MCNP and will become a standard feature of future releases. This feature includes first and/or second order terms of the Taylor Series expansion for response perturbations related to cross-section data (i.e., density, composition, etc.). Criticality analyses can benefit from this technique in that predicted changes in the track-length tally estimator of Keff may be obtained for multiple perturbations in a single run. A key advantage of this method is that a precise estimate of a small change in response (i.e., < 1%) is easily obtained. This technique can also offer acceptable accuracy, to within a few percent, for up to 20-30% changes in a response.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 100040
- Report Number(s):
- LA-UR-95-2015; CONF-9509100-22; ON: DE95015296; TRN: 95:019272
- Resource Relation:
- Conference: ICNC '95: 5. International Conference on Nuclear Criticality Safety, Albuquerque, NM (United States), 17-22 Sep 1995; Other Information: PBD: [1995]
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
97 MATHEMATICS AND COMPUTING
CRITICALITY
M CODES
PERTURBATION THEORY
MONTE CARLO METHOD
SERIES EXPANSION
FISSION
NEUTRON TRANSPORT
CROSS SECTIONS
Nuclear Criticality Safety Program (NCSP)
Monte Carlo N-Particle (MCNP) Transport Code
Differential Operator Perturbation Technique
Taylor Series Expansion
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