The impact of 238U resonance elastic scattering approximations on thermal reactor Doppler reactivity
Creators
- 1. Studsvik Scandpower Inc., Idaho Falls (United States)
Description
The effects of accurate modeling of neutron scattering in 238U resonances are analyzed for typical light water reactor (LWR) and next generation nuclear plant (NGNP) lattices. An exact scattering kernel is formulated and implemented in a newly developed Monte Carlo code, MCSD (Monte Carlo slowing down), which solves a neutron slowing down in an infinite homogeneous medium and is used to generate resonance integral data used in the CASMO-5 lattice physics code. It is shown that the exact scattering kernel increases LWR Doppler coefficients by ∼10% relative to the traditional assumption of asymptotic elastic downscatter for 238U resonances. These resonance modeling improvements are shown to decrease hot full power eigenvalues by ∼200 pcm for LWRs and ∼450 pcm for NGNPs
Availability note (English)
Available from http://dx.doi.org/10.1016/j.anucene.2008.11.026Additional details
Identifiers
- DOI
- 10.1016/j.anucene.2008.11.026;
- PII
- S0306-4549(08)00308-3;
Publishing Information
- Journal Title
- Annals of Nuclear Energy (Oxford)
- Journal Volume
- 36
- Journal Issue
- 3
- Journal Page Range
- p. 274-280
- ISSN
- 0306-4549
- CODEN
- ANENDJ
Conference
- Title
- Nuclear power, a sustainable resource: 2008 international conference on the physics of reactors
- Acronym
- PHYSOR 2008
- Dates
- 14-19 Sep 2008
- Place
- Interlaken (Switzerland)
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 40045570
- Subject category
- S11: NUCLEAR FUEL CYCLE AND FUEL MATERIALS; S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY; S22: GENERAL STUDIES OF NUCLEAR REACTORS;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ASYMPTOTIC SOLUTIONS; DOPPLER COEFFICIENT; EIGENVALUES; ELASTIC SCATTERING; KERNELS; MONTE CARLO METHOD; NEUTRON DIFFRACTION; NEUTRONS; NUCLEAR POWER PLANTS; REACTIVITY; RESONANCE; RESONANCE INTEGRALS; SIMULATION; THERMAL REACTORS; URANIUM 238; WATER COOLED REACTORS; WATER MODERATED REACTORS
- Descriptors DEC
- ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; BARYONS; CALCULATION METHODS; COHERENT SCATTERING; DIFFRACTION; ELEMENTARY PARTICLES; EVEN-EVEN NUCLEI; FERMIONS; HADRONS; HEAVY NUCLEI; INTEGRALS; ISOTOPES; MATHEMATICAL SOLUTIONS; NUCLEAR FACILITIES; NUCLEI; NUCLEONS; POWER PLANTS; RADIOISOTOPES; REACTIVITY COEFFICIENTS; REACTORS; SCATTERING; SPONTANEOUS FISSION RADIOISOTOPES; THERMAL POWER PLANTS; URANIUM ISOTOPES; YEARS LIVING RADIOISOTOPES
Optional Information
- Copyright
- Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.