Authors & Affiliations
Bikeev A.S., Kalugin M.A., Kuznetcov A.N., Shkarovsky D.A.
National Research Centre "Kurchatov Institute", Moscow, Russia
Bikeev A.S. – Head of Software Laboratory, National Research Center "Kurchatov Institute".
Kalugin M.A. – Scientific Director of the Kurchatov Nuclear Power Complex, Dr. Sci. (Tech.), National Research Center "Kurchatov Institute".
Shkarovsky D.A. – Head of the Division of Benchmark Calculations of Nuclear Reactors, Cand. Sci. (Phys. and Math.), National Research Center "Kurchatov Institute".
The paper describes the realization of the the radiation energy release calculating possibility in structural materials using the precision Verified MCU Monte Carlo code using KERMA factors. It is shown that for this calculation of energy release, the MCU-PTR program uses the submodule of the DOSIM registration module included in it, which works with the activation cross sections of neutrons and photons.In the case of using KERMA factors, all calculations are performed in the same way as usual, with the only difference being that instead of the activation cross sections, the cross sections of the radiation energy release are substituted into the desired functional. Thus, for calculation it is nec-essary to copy the files of the kerma factor library for neutrons and photons to the DOSIM folder, and then use their names in the standard way when specifying the source data for the registration module.
Using the NJOY code and the ENDF-B/VII.1 library, the KERMA library has been developed, which contains 422 files for neutrons and 100 for photons. Data libraries are contained in two formats - for calculation and visualization. To test both received KERMA-factors, and the approach to modernization, an infinite lattice of two-dimensional fuel cells is considered. It is assumed that the cladding of a fuel element is isotope, for which the quality of the calculation of radiation heating from neutrons and photons is checked by comparing the results of the calculation with the programs MCU-PTR and MCNP5. The discrepancy between the calculated energy releases reaches 21% in some cases. In addition, neutron and photon fluxes also differ – that is, in addition to the error related to the quality of KERMA factors, contribution is made by errors which are associated with libraries used to model the transport of neutrons and photons and used for the production of photons in neutron reactions, and also are associated with the difference in the ways of modeling these processes.
KERMA factors, energy release, MCU-PTR, Monte-Carlo, Nuclear Data Libraries, KERMA, MCNP5, infinite lattice of fuel assemblies, neutrons, photons
1. MCNP A General Monte Carlo N-Particle Transport Code, Version 5. Volume I: Overview and Theory. X-5 Monte Carlo Team. April 24, 2003(Revised 6/30/04). LA-UR-03-1987.
2. MacFarlane R.E., Muir D.W.The NJOY Nuclear Data Processing System Version 91. LA-12740-M, October 1994.
3. Svidetel'stvo o gosudarstvennoy registratsii programmy dlya EVM no. 2010613724 [Certificate of state registration of the computer program no. 2010613724]. The Federal Service for Intellectual Property, Patents and Trademarks, 08.06.2010.
4. MCU-PTR s bibliotekoy konstant MDBPT50 [MCU-PTR with constant library MDBPT50]. Certification passport, no. 320. Moscow, Federal Service for Environmental, Technological and Nuclear Supervision (Rostechnadzor), 2013.
5. Trkov A., Herman M., Brown D.A. ENDF-6 Formats Manual. Data Formats and Procedures for the Evaluated Nuclear Data Files ENDF/B-VI and ENDF/B-VII. December 2011. CSEWG Document ENDF-102. Report BNL-90365-2009 Rev.2.
6. Muir D.W. Gamma Rays, Q-Values, and Kerma Factors. Los Alamos Scientific Laboratory report LA-6258-MS, March 1976.
7. Center for collective use "Complex of modeling and data processing of mega-class research installations" NRC "Kurchatov Institute" Available at: ckp.nrcki.ru (accessed 27.09.2018).