Software package ACDAM for investigation of nuclear physical properties of materials in conditions of long-term neutron irradiation

Nuclear physical properties of zirconium alloys E110 and E635 under long-term neutron irradiation in VVER-1000 reactor

“…The study of nuclear physical properties of alloys under their long term irradiation has been con ducted in this work using the basic ACDAM package [6]. For this purpose, the ACDAM/ACT library included in the ACDAM package was prepared in a 175 group approximation (VITAMIN J structure) and folded into a one group representation according to the neu tron spectrum of a VVER 1000.…”

“…It is interesting at the same time to investigate the level of primary radiation damage of alloys under long term irradiation and the attenuation of the induced activity (cooling) in alloys after the irra diation has been terminated. Using the ACDAM soft ware package created at the Nuclear Data Center of the Russian State Scientific Center Leipunskii Insti tute for Physics and Power Engineering [6,7], the medium term (to 560 days) irradiation of zirconium and the alloys E110 and E635 to neutron spectra of a VVER 1000 type reactor was investigated [7,8]. In this work, the nuclear physical properties of zirconium and the alloys E110 and E635 under their prolonged irradiation by the neutron spectrum of a VVER 1000 type reactor [7,8] are considered on the basis of the ACDAM package [6].…”

“…Using the ACDAM soft ware package created at the Nuclear Data Center of the Russian State Scientific Center Leipunskii Insti tute for Physics and Power Engineering [6,7], the medium term (to 560 days) irradiation of zirconium and the alloys E110 and E635 to neutron spectra of a VVER 1000 type reactor was investigated [7,8]. In this work, the nuclear physical properties of zirconium and the alloys E110 and E635 under their prolonged irradiation by the neutron spectrum of a VVER 1000 type reactor [7,8] are considered on the basis of the ACDAM package [6]. The investigation of the nuclear physical properties of zirconium alloys in this intense spectrum (VVER reactor core) during long term irra diation provides data on asymptotic values of radiation characteristics of alloys irradiated for a long time by neutron spectra with other intensities and doses (with close group distributions of neutrons in energy).…”

Benefits in Using Lead-208 Coolant for Fast Reactors and Accelerator Driven Systems

“…4and Fig.5 the results of estimation of Pu-239 accumulation and U-238 incineration in the subzone 3 of the 80 MW thermal ADS are given. These calculations were performed using ACDAM code developed in the IPPE [8]. …”

New Coolant from Lead Enriched with the Isotope Lead-208 and Possibility of Its Acquisition from Thorium Ores and Minerals for Nuclear Energy Needs

“…Ways of minimization of neutron absorption in FR are well-known: it is offered to use wrapper less fuel assemblies, low neutron absorbing nitrogen isotope 15 N in nitride fuel contents, structural materials with low cross section of neutron capture, etc.…”