TY - JOUR AU - Légrády, Dávid AU - Halász, Máté Gergely AU - Kópházi, József AU - Molnár, Balázs AU - Tolnai, Gábor TI - Population-based variance reduction for dynamic Monte Carlo JF - ANNALS OF NUCLEAR ENERGY J2 - ANN NUCL ENERGY VL - 149 PY - 2020 SN - 0306-4549 DO - 10.1016/j.anucene.2020.107752 UR - https://m2.mtmt.hu/api/publication/31598114 ID - 31598114 LA - English DB - MTMT ER - TY - JOUR AU - Böröczki, Zoltán István AU - Klujber, Gergely AU - Tolnai, Gábor AU - Molnár, Balázs AU - Légrády, Dávid AU - Gabrielli, F. AU - Rineiski, A. AU - Szieberth, Máté TI - Simulation of a research reactor reactivity transient with deterministic and GPU-assisted Monte Carlo reactor kinetics codes JF - EUROPEAN PHYSICAL JOURNAL PLUS J2 - EUR PHYS J PLUS VL - 135 PY - 2020 IS - 3 SP - 281 SN - 2190-5444 DO - 10.1140/epjp/s13360-020-00280-4 UR - https://m2.mtmt.hu/api/publication/31208562 ID - 31208562 N1 - Institute of Nuclear Techniques, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest, 1111, Hungary Institute for Neutron Physics and Reactor Technology, Karlsruhe Institute of Technology, Hermann-von-Helmholtzplatz 1, Eggenstein-Leopoldshafen, Karlsruhe, 76344, Germany Cited By :4 Export Date: 17 June 2022 Correspondence Address: Szieberth, M.; Institute of Nuclear Techniques, Műegyetem rkp. 3., Hungary; email: szieberth@reak.bme.hu AB - Reactor kinetic codes are crucial in safety assessment. Validating spatial and high temporal resolution kinetic solvers without thermal feedback is problematic as measurements seldom involve detailed spatial and fine temporal resolution. Benchmarking of deterministic codes thus often resorts to code-to-code comparison against Monte Carlo codes, which can only recently treat direct time dependence. In this paper, we have attempted to compare results from the GUARDYAN directly time-dependent Monte Carlo code and the SEnTRi transient driver developed for the PARTISN deterministic transport code to low power transient measured at the BME Training Reactor. Code-to-measurement comparisons were successful, despite a major uncertainty in the actual timing of the reactivity insertion and withdrawal originating from the instrumentation of the pneumatic rabbit system. Code-to-code comparisons concluded that time dependence was correctly implemented in both GUARDYAN and SEnTRi; furthermore, a hypothetical scenario was set up involving an instantaneous insertion of a negative reactivity into the BME TR core in order to compare spatially and temporally dependent fluxes. The simulations demonstrated the appearance of higher-order modes, and results showed a relatively good match, although fidelity of the comparison could be further improved by reducing the statistical uncertainty of the results provided by GUARDYAN. LA - English DB - MTMT ER - TY - JOUR AU - Molnár, Balázs AU - Tolnai, Gábor AU - Tóth, Boglárka AU - Légrády, Dávid AU - Horváth, András TI - A GUARDYAN GPU alapú reaktorkinetikai Monte Carlo-kód JF - NUKLEON J2 - NUKLEON VL - 12 PY - 2019 IS - 11 SN - 1789-9613 UR - https://m2.mtmt.hu/api/publication/31320567 ID - 31320567 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Molnár, Balázs AU - Tolnai, Gábor AU - Légrády, Dávid TI - A GPU-based direct Monte Carlo simulation of time dependence in nuclear reactors JF - ANNALS OF NUCLEAR ENERGY J2 - ANN NUCL ENERGY VL - 132 PY - 2019 SP - 46 EP - 63 PG - 18 SN - 0306-4549 DO - 10.1016/j.anucene.2019.03.024 UR - https://m2.mtmt.hu/api/publication/30738309 ID - 30738309 N1 - Funding Agency and Grant Number: National Research, Development and Innovation Fund [VKSZ_14-1-2015-0021] Funding text: This work has been carried out in the frame of VKSZ_14-1-2015-0021 Hungarian project supported by the National Research, Development and Innovation Fund. LA - English DB - MTMT ER - TY - CONF AU - Molnár, Balázs AU - Tolnai, Gábor AU - Légrády, Dávid AU - Szieberth, Máté TI - VECTORIZED MONTE CARLO FOR GUARDYAN - A GPUACCELERATED REACTOR DYNAMICS CODE T2 - Proceedings of the PHYSOR 2018 PY - 2018 PG - 11 UR - https://m2.mtmt.hu/api/publication/31324372 ID - 31324372 LA - English DB - MTMT ER - TY - CONF AU - Légrády, Dávid AU - A., Claret AU - Molnár, Balázs AU - Tolna, G. TI - VERIFICATION OF THE INTERACTION PHYSICS OF GUARDYAN A NOVEL GPU-BASED MONTE CARLO CODE FOR SHORT TIME SCALE REACTOR TRANSIENTS T2 - Proceedings of the PHYSOR 2018 PY - 2018 PG - 10 UR - https://m2.mtmt.hu/api/publication/31324346 ID - 31324346 LA - English DB - MTMT ER - TY - JOUR AU - Molnár, Balázs AU - Tolnai, Gábor AU - Légrády, Dávid TI - Variance reduction and optimization strategies in a biased woodcock particle tracking framework JF - NUCLEAR SCIENCE AND ENGINEERING J2 - NUCL SCI ENG VL - 190 PY - 2018 IS - 1 SP - 56 EP - 72 PG - 17 SN - 0029-5639 DO - 10.1080/00295639.2017.1413876 UR - https://m2.mtmt.hu/api/publication/3365767 ID - 3365767 LA - English DB - MTMT ER - TY - CHAP AU - Molnár, Balázs AU - David, Legrady TI - Variance analysis of Woodcock type tracking T2 - International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2017) PB - Korea Nuclear Society CY - Jeju SN - 9781510856455 PY - 2017 SP - 1 UR - https://m2.mtmt.hu/api/publication/3384646 ID - 3384646 LA - English DB - MTMT ER - TY - JOUR AU - Szirmay-Kalos, László AU - Iliyan, Georgiev AU - Magdics, Milán AU - Molnár, Balázs AU - Légrády, Dávid TI - Unbiased Light Transport Estimators for Inhomogeneous Participating Media JF - COMPUTER GRAPHICS FORUM J2 - COMPUT GRAPH FORUM VL - 36 PY - 2017 IS - 2 SP - 9 EP - 19 PG - 11 SN - 0167-7055 DO - 10.1111/cgf.13102 UR - https://m2.mtmt.hu/api/publication/3180843 ID - 3180843 LA - English DB - MTMT ER - TY - JOUR AU - Légrády, Dávid AU - Molnár, Balázs AU - Klausz, Milán AU - Major, Tibor TI - Woodcock tracking with arbitrary sampling cross section using negative weights JF - ANNALS OF NUCLEAR ENERGY J2 - ANN NUCL ENERGY VL - 102 PY - 2017 SP - 116 EP - 123 PG - 8 SN - 0306-4549 DO - 10.1016/j.anucene.2016.12.003 UR - https://m2.mtmt.hu/api/publication/3159723 ID - 3159723 LA - English DB - MTMT ER -