Application of the systematic homogenization theory to BWRs
Journal Article
·
· Transactions of the American Nuclear Society
OSTI ID:89130
Due to characteristics unique to boiling water reactors (BWRs), application of homogenization techniques and coarse-mesh nodal diffusion methods for flux calculation and flux and pin power reconstruction necessitates coupling the analysis with core thermal hydraulics to obtain steady-state neutron flux distribution that is consistent with the steady-state core thermal hydraulics. We previously developed a diffusion-equation-based systematic (fuel assembly) homogenization theory (SHT) for use with coarse-mesh nodal diffusion calculations as well as a transport-theory-based SHT. These were developed using multiple-scales asymptotic analysis; starting from the diffusion equation and two spatial scales for the former and from the transport equation and three spatial scales for the latter. We have also developed a nodal method for nuclear-coupled single- and two-phase thermal hydraulics that is used in conjunction with the nodal Green`s function method for the neutron kinetics of BWRs. Making use of these previous developments, we have now applied the diffusion-equation-based SHT to determine self-consistent neutron fluxes and core thermal-hydraulics variables in BWRs.
- OSTI ID:
- 89130
- Report Number(s):
- CONF-941102--
- Journal Information:
- Transactions of the American Nuclear Society, Journal Name: Transactions of the American Nuclear Society Vol. 71; ISSN 0003-018X; ISSN TANSAO
- Country of Publication:
- United States
- Language:
- English
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