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Zagar, Tomaz; Ravnik, Matjaz, E-mail: Tomaz.Zagar@ijs.si, E-mail: Matjaz.Ravnik@ijs.si
CD3 TRIGA users conference2008
CD3 TRIGA users conference2008
AbstractAbstract
[en] The results of activation studies of ordinary and barite concrete samples relevant for research reactor decommissioning are given. Five important long-lived radioactive isotopes (46Sc, 54Mn, 60Co, 65Zn, 133Ba, and 152Eu) were identified from the gamma-ray spectra measured in the irradiated concrete samples. All these isotopes are produced from thermal neutron capture reactions, except 54Mn, which is produced from fast neutron reactions. Activation of these samples was also calculated using ORIGEN2 code. Comparison of calculated and measured results is given. From measurements and calculations we concluded that in ordinary concrete the residual long-lived radioactivity is predominantly due to trace elements presence. The residual long-lived gamma radioactivity in barite concrete is predominantly due to 133Ba, which is produced in thermal neutron capture reaction from barium, which is a basic element in barytes concrete. (authors)
Primary Subject
Source
Romanian Electricity Authority, RENEL, 33, Gen. Gh. Magheru Blvd. RO - 70164, Bucharest (Romania); Institute for Nuclear Research, INR, PO Box 78, 1 Campului Street, RO-115400 Pitesti-Mioveni (Romania); 366 p; 2008; p. S3.11.1-S3.11.8; 16. European Conference of TRIGA reactors operators; Pitesti (Romania); 25-28 Sep 2000; 8 refs., 5 figs., 3 tabs.
Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
ACTIVATION ANALYSIS, ALKALINE EARTH ISOTOPES, BARIUM ISOTOPES, BARYONS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, BUILDING MATERIALS, CHEMICAL ANALYSIS, COBALT ISOTOPES, COMPUTER CODES, DAYS LIVING RADIOISOTOPES, ELECTRON CAPTURE RADIOISOTOPES, ELEMENTARY PARTICLES, ENRICHED URANIUM REACTORS, EUROPIUM ISOTOPES, EVEN-ODD NUCLEI, FERMIONS, HADRONS, HOMOGENEOUS REACTORS, HOURS LIVING RADIOISOTOPES, HYDRIDE MODERATED REACTORS, INTERMEDIATE MASS NUCLEI, INTERNAL CONVERSION RADIOISOTOPES, IRRADIATION REACTORS, ISOMERIC TRANSITION ISOTOPES, ISOTOPE PRODUCTION REACTORS, ISOTOPES, MANGANESE ISOTOPES, MATERIALS, MINERALS, MINUTES LIVING RADIOISOTOPES, NEUTRONS, NONDESTRUCTIVE ANALYSIS, NUCLEI, NUCLEONS, ODD-ODD NUCLEI, RADIOISOTOPES, RARE EARTH NUCLEI, REACTORS, RESEARCH AND TEST REACTORS, SCANDIUM ISOTOPES, SECONDS LIVING RADIOISOTOPES, SOLID HOMOGENEOUS REACTORS, SULFATE MINERALS, THERMAL REACTORS, TRIGA TYPE REACTORS, WATER COOLED REACTORS, WATER MODERATED REACTORS, YEARS LIVING RADIOISOTOPES, ZINC ISOTOPES
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