Calculational and experimental investigations of void effect - A simple theoretical model for space-dependent leakage treatment of heterogeneous assemblies
Апстракт
This method, which takes into account the influence of assembly heterogeneity on neutron leakage, is based on the heterogeneous B1 formalism, which assumes the existence of a fundamental mode in an infinite and regular lattice of heterogeneous assemblies A simplified formalism, TIBERE, is presented that allows one to define directional space-dependent leakage coefficients This method, introduced for two-dimensional x-y geometry in the APOLLO-2 multigroup transport code, uses classical and directional first-flight collision probabilities One can now define leakage cross sections as additional absorption cross sections that have space and energy dependence, as well as all other cross sections Hence, one obtains perfectly consistent reaction and leakage rates used in an equivalence procedure, determining cell-homogenized parameters for a whole core calculation The study of this refined heterogeneous leakage treatment was undertaken because of the insufficiency of the homogeneous leakage m...odel, especially in cases when an assembly contain voided zones or almost voided zones, ie, zones with a long mean free path, so that the streaming effect may become important The fission rate comparison between the EPICURE reactor experimental results and the results of the corresponding whole reactor calculations were accomplished, with leakages calculated by the homogeneous and the TIBERE procedures of the APOLLO-2 code
Извор:
Nuclear Science and Engineering, 1994, 118, 4, 197-216URI
https://vinar.vin.bg.ac.rs/handle/123456789/8553http://inis.iaea.org/search/search.aspx?orig_q=RN:26037915
Колекције
Институција/група
VinčaTY - JOUR AU - Benoist, Pierre AU - Petrović, Ivan M. AU - Mondot, Jacques PY - 1994 UR - https://vinar.vin.bg.ac.rs/handle/123456789/8553 UR - http://inis.iaea.org/search/search.aspx?orig_q=RN:26037915 AB - This method, which takes into account the influence of assembly heterogeneity on neutron leakage, is based on the heterogeneous B1 formalism, which assumes the existence of a fundamental mode in an infinite and regular lattice of heterogeneous assemblies A simplified formalism, TIBERE, is presented that allows one to define directional space-dependent leakage coefficients This method, introduced for two-dimensional x-y geometry in the APOLLO-2 multigroup transport code, uses classical and directional first-flight collision probabilities One can now define leakage cross sections as additional absorption cross sections that have space and energy dependence, as well as all other cross sections Hence, one obtains perfectly consistent reaction and leakage rates used in an equivalence procedure, determining cell-homogenized parameters for a whole core calculation The study of this refined heterogeneous leakage treatment was undertaken because of the insufficiency of the homogeneous leakage model, especially in cases when an assembly contain voided zones or almost voided zones, ie, zones with a long mean free path, so that the streaming effect may become important The fission rate comparison between the EPICURE reactor experimental results and the results of the corresponding whole reactor calculations were accomplished, with leakages calculated by the homogeneous and the TIBERE procedures of the APOLLO-2 code T2 - Nuclear Science and Engineering T1 - Calculational and experimental investigations of void effect - A simple theoretical model for space-dependent leakage treatment of heterogeneous assemblies VL - 118 IS - 4 SP - 197 EP - 216 DO - 10.13182/NSE94-A21491 ER -
@article{ author = "Benoist, Pierre and Petrović, Ivan M. and Mondot, Jacques", year = "1994", abstract = "This method, which takes into account the influence of assembly heterogeneity on neutron leakage, is based on the heterogeneous B1 formalism, which assumes the existence of a fundamental mode in an infinite and regular lattice of heterogeneous assemblies A simplified formalism, TIBERE, is presented that allows one to define directional space-dependent leakage coefficients This method, introduced for two-dimensional x-y geometry in the APOLLO-2 multigroup transport code, uses classical and directional first-flight collision probabilities One can now define leakage cross sections as additional absorption cross sections that have space and energy dependence, as well as all other cross sections Hence, one obtains perfectly consistent reaction and leakage rates used in an equivalence procedure, determining cell-homogenized parameters for a whole core calculation The study of this refined heterogeneous leakage treatment was undertaken because of the insufficiency of the homogeneous leakage model, especially in cases when an assembly contain voided zones or almost voided zones, ie, zones with a long mean free path, so that the streaming effect may become important The fission rate comparison between the EPICURE reactor experimental results and the results of the corresponding whole reactor calculations were accomplished, with leakages calculated by the homogeneous and the TIBERE procedures of the APOLLO-2 code", journal = "Nuclear Science and Engineering", title = "Calculational and experimental investigations of void effect - A simple theoretical model for space-dependent leakage treatment of heterogeneous assemblies", volume = "118", number = "4", pages = "197-216", doi = "10.13182/NSE94-A21491" }
Benoist, P., Petrović, I. M.,& Mondot, J.. (1994). Calculational and experimental investigations of void effect - A simple theoretical model for space-dependent leakage treatment of heterogeneous assemblies. in Nuclear Science and Engineering, 118(4), 197-216. https://doi.org/10.13182/NSE94-A21491
Benoist P, Petrović IM, Mondot J. Calculational and experimental investigations of void effect - A simple theoretical model for space-dependent leakage treatment of heterogeneous assemblies. in Nuclear Science and Engineering. 1994;118(4):197-216. doi:10.13182/NSE94-A21491 .
Benoist, Pierre, Petrović, Ivan M., Mondot, Jacques, "Calculational and experimental investigations of void effect - A simple theoretical model for space-dependent leakage treatment of heterogeneous assemblies" in Nuclear Science and Engineering, 118, no. 4 (1994):197-216, https://doi.org/10.13182/NSE94-A21491 . .