SOME NEW EXPERIENCE WITH ZR-6 MEASUREMENTS USING DIFFERENT CODE SYSTEMS
17th Symposium of AER on VVER Reactor Physics and Reactor Safety (2007, Yalta, Crimea (Ukraine, back then))
CORE OPERATION, EXPERIMENTS AND CODE VALIDATION
The ZR-6 critical experiments and the validation of lattice physics codes and their cross section library are described. The parameter of interest in this analysis is the temperature reactivity coefficient. It is very important in design, control and safety, particularly in the light water reactors the VVER plants are belonging to. The agreement between calculations and measurements differs for different codes using different nuclear data. Nowadays calculations have been performed by the French code APOLLO-2 version 2.7 using the JEF-2.2 based CEA93.V7 group library. The work is a part of the NURESIM project, where KFKI AEKI undertook to develop and qualify some calculation schemes for hexagonal problems.