title: Determination of critical assembly absolute power using post-irradiation activation measurement of week-lived fission products.
abstract: The work presents a detailed comparison of calculated and experimentally determined net peak areas of longer-living fission products after 100 h irradiation on a reactor with power of ~630 W and several days cooling. Specifically the nuclides studied are (140)Ba, (103)Ru, (131)I, (141)Ce, (95)Zr. The good agreement between the calculated and measured net peak areas, which is better than in determination using short lived (92)Sr, is reported. The experiment was conducted on the VVER-1000 mock-up installed on the LR-0 reactor. The Monte Carlo approach has been used for calculations. The influence of different data libraries on results of calculation is discussed as well.
authors.affiliation: Research Center Rez Ltd, 250 68 Husinec-Rez 130, Czech Republic. Electronic address: ksl@cvrez.cz.
authors.forename: Michal
authors.initials: M
authors.lastname: Košťál
authors.affiliation: Research Center Rez Ltd, 250 68 Husinec-Rez 130, Czech Republic.
authors.forename: Marie
authors.initials: M
authors.lastname: Švadlenková
authors.affiliation: Research Center Rez Ltd, 250 68 Husinec-Rez 130, Czech Republic.
authors.forename: Ján
authors.initials: J
authors.lastname: Milčák
authors.affiliation: Research Center Rez Ltd, 250 68 Husinec-Rez 130, Czech Republic.
authors.forename: Vojtěch
authors.initials: V
authors.lastname: Rypar
authors.affiliation: Research Center Rez Ltd, 250 68 Husinec-Rez 130, Czech Republic.
authors.forename: Michal
authors.initials: M
authors.lastname: Koleška
mesh_terms: D006207:Half-Life; D009010:Monte Carlo Method; D009688:Nuclear Reactors / Q000295:instrumentation*; D011868:Radioisotopes / Q000737:chemistry*; D013051:Spectrometry, Gamma
chemical_list: D011868:Radioisotopes
keywords: Fission products; LR-0; Pin power density; VVER-1000