Experience with WOLSONG-1 Phase-B Pre-Simulations Using WIMS/DRAGON/RFSP-IST Code Suite

Abstract

The Wolsong-1 Phase-B pre-simulations have been carried out with the exclusive use of the code suite WIMS / DRAGON / RFSP-IST in replacement of the previous PPV / MULTICELL / RFSP code system in preparation of tests to be conducted as scheduled in December 2010 after the refurbishment. A comprehensive simulation package has been undertaken starting from the approach to first criticality to the flux measurements and scan. In order to secure the validity of the results, the simulations are performed using both the Uniform and SCM fuel tables. An elaborating contribution has been invested into the work in view of the inexperience of using WIMS / SCM fuel tables as well as incremental cross sections generated by using DRAGON-IST. The overall assessment of simulation results indicates that the newly adopted WIMS / DRAGON / RFSP-IST code suite could be used in replacement of PPV / MULTICELL / RFSP for the verification against the Phase-B test results.