IMPLEMENTAION OF DYNAMIC CONTROL ROD REACTIVITY MEASURMENT METHOD TO STREAM/RAST-K 2.0

Abstract

This paper presents implementation of dynamic control rod reactivity measurement (DCRM) approach for measurement of control rod worths to STREAM/RAST-K2.0 two-step code system developed by Computational Reactor Physics and Experiment laboratory (CORE) in Ulsan National Institute Science and Technology (UNIST). First, Short introduction of the DCRM process and the code system is described. Secondly, STREAM/RAST-K2.0 DCRM calculation for the OPR-1000 cycle N dynamic and static reactivity results are compared with the two different data to evaluate STREAM/RAST-K 2.0 DCRM calculation reliability. The RAST-K 1.0/INVERSE licensed code system results that from the response factor pregenerated process and INVERSE code results that from measured ex-core detector data are used for results analysis. The statics worth error acceptance criteria between measured data and reactor analysis code simulation is under 15%. From these results it is confirmed that STREAM/RAST-K 2.0 two-step code system can generate reasonable DCRM simulation results because all regulating rod groups statics reactivities satisfy error criteria when compared with statics reactivity from measured DCRM ex-core detector. As future work, research and implementation for producing more accurate results of DCRM application to STREEAM / RAST-K 2.0, and production of results for different reactor core will be conducted.