Towards an efficient multiphysics model for nuclear reactor dynamics
Availability of fast computer resources nowadays has facilitated more in-depth modeling of complex engineering systems which involve strong multiphysics interactions. This multiphysics modeling is an important necessity in nuclear reactor safety studies where efforts are being made world...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
VINCA Institute of Nuclear Sciences
2015-01-01
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| Series: | Nuclear Technology and Radiation Protection |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1451-3994/2015/1451-39941503165O.pdf |
| Summary: | Availability of fast computer resources nowadays has facilitated more
in-depth modeling of complex engineering systems which involve strong
multiphysics interactions. This multiphysics modeling is an important
necessity in nuclear reactor safety studies where efforts are being made
worldwide to combine the knowledge from all associated disciplines at one
place to accomplish the most realistic simulation of involved phenomenon. On
these lines coupled modeling of nuclear reactor neutron kinetics, fuel heat
transfer and coolant transport is a regular practice nowadays for transient
analysis of reactor core. However optimization between modeling accuracy and
computational economy has always been a challenging task to ensure the
adequate degree of reliability in such extensive numerical exercises. Complex
reactor core modeling involves estimation of evolving 3-D core thermal
state, which in turn demands an expensive multichannel based detailed core
thermal hydraulics model. A novel approach of power weighted coupling between
core neutronics and thermal hydraulics presented in this work aims to reduce
the bulk of core thermal calculations in core dynamics modeling to a
significant extent without compromising accuracy of computation. Coupled core
model has been validated against a series of international benchmarks.
Accuracy and computational efficiency of the proposed multiphysics model has
been demonstrated by analyzing a reactivity initiated transient. |
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| ISSN: | 1451-3994 1452-8185 |