SOLUTION OF THE OECD KALININ-3 BENCHMARK – EXERCISE 2 AND 3
24th Symposium of AER on VVER Reactor Physics and Reactor Safety (2014, Sochi, Russia)
Reactor dynamics and safety analysis
Abstract
SOLUTION OF THE OECD KALININ-3 BENCHMARK – EXERCISE 2 AND 3
Jan Hádek
ÚJV Rez, a. s., Hlavní 130, 250 68 Husinec-Rez, Czech Republic
jan.hadek@ujv.cz
ABSTRACT
The paper describes the results of the OECD benchmark problem that is connected with investigation of transient behavior in Kalinin-3 nuclear power plant (VVER-1000). The benchmark was defined by colleagues from VNIIAES (Russian Federation), RRC “Kurchatov Institute” (Russian Federation), GRS mbH (Germany) and Penn State University (USA). The benchmark simulation problem is the reactor coolant pump No. 1 switching off at the nominal power when the other three reactor coolant pumps are in operation during the experiment. Overall, the benchmark consists of four exercises. Exercise 1 describes the plant simulation with point kinetics model. Exercise 2 is devoted to the benchmark solution with using of stand-alone 3D reactor dynamic codes. The time-dependent thermal-hydraulic boundary conditions at the inlet of the reactor core are given in this task. Exercise 3 describes the solution of the problem by the coupled 3D reactor dynamic codes and the plant system codes. Exercise 4 is devoted to the uncertainty analysis. The paper is focused on solving of Exercises 2 and 3. Two different macroscopic cross section libraries are used. It is the library prepared in cooperation Penn State – Risk Engineering Ltd. (Bulgaria) and then the library from RRC “Kurchatov Institute”. The solution of Exercise 2 and 3 was performed by the code DYN3D and the coupled codes DYN3D/ATHLET. The calculation results obtained by both cross section libraries are compared with experimental values. The differences in the time behavior of compared parameters are discussed. In general, the results of benchmark calculations can serve as a reference when dealing with potential customers. They can also be used as supporting material during licensing of DYN3D and DYN3D/ATHLET codes in Czech Republic.