Evaluation of the Extended ‘Full Core’ VVER-440 Benchmark Using the KARATE and MCNP Code Systems
25th Symposium of AER on VVER Reactor Physics and Reactor Safety (2015, Balatongyörök, Hungary)
Reactor physics experiments and code validation (benchmarks)
Abstract
Evaluation has been performed for the extended mathematical benchmark described in the
Atomic Energy Research (AER) association devoted to the VVER physics, using the models of
the KARATE code system and MCNP. The main task of the benchmark is to test the assembly
averaged and pin by pin power distribution predicted by codes that are used for reactor physical
calculation in the engineering practice. The calculated power distribution especially in assemblies
and pins next to the reflector strongly depends on the modelling choice. In case of a VVER-440
core high power peakings can be observed in the vicinity of control assembly, too.
In the paper the linear pin power calculation methodology of KARATE near the reflector
and control assembly will be presented and our results will be shown.