title: Assessment of the radionuclide composition of "hot particles" sampled in the Chernobyl nuclear power plant fourth reactor unit.
abstract: Fuel-containing materials sampled from within the Chernobyl Nuclear Power Plant (ChNPP) Unit 4 Confinement Shelter were spectroscopically studied for gamma and alpha content. Isotopic ratios for cesium, europium, plutonium, americium, and curium were identified, and the fuel burn-up in these samples was determined. A systematic deviation in the burn-up values based on the cesium isotopes in comparison with other radionuclides was observed. The studies conducted were the first ever performed to demonstrate the presence of significant quantities of 242Cm and 243Cm. It was determined that there was a systematic underestimation of activities of transuranic radionuclides in fuel samples from inside of the ChNPP Confinement Shelter, starting from 241Am (and going higher) in comparison with the theoretical calculations.
authors: Chernobyl Center for Nuclear Safety, Radioactive Waste and Radioecology, International Radioecology Laboratory, Slavutych, Ukraine.
authors: Mikhail D
authors: MD
authors: Bondarkov
authors: Viktor A
authors: VA
authors: Zheltonozhsky
authors: Maryna V
authors: MV
authors: Zheltonozhskaya
authors: Nadezhda V
authors: NV
authors: Kulich
authors: Andrey M
authors: AM
authors: Maksimenko
authors: Eduardo B
authors: EB
authors: Farfán
authors: G Timothy
authors: GT
authors: Jannik
authors: James C
authors: JC
authors: Marra
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D000576:Americium / Q000032:analysis; D002586:Cesium / Q000032:analysis; D047852:Chernobyl Nuclear Accident; D003476:Curium / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods*; D005063:Europium / Q000032:analysis; D055848:Nuclear Power Plants; D011005:Plutonium / Q000032:analysis; D018570:Risk Assessment / Q000379:methods; D013057:Spectrum Analysis / Q000379:methods; D014455:Ukraine
chemical_list: D000396:Air Pollutants, Radioactive; D002586:Cesium; D005063:Europium; D011005:Plutonium; D003476:Curium; D000576:Americium