Territory contamination with the radionuclides representing the fuel component of Chernobyl fallout.
The data obtained through a series of experiments were used to specify the correlation of activities of the fuel component radionuclides of Chernobyl fallout and to create the maps of the 30-km Chernobyl zone terrestrial density of contamination with 154Eu, 238Pu, 239+240Pu and 241Am (on 01.01.2000). In the year 2000, total inventories of the fuel component radionuclides in the upper 30-cm soil layer of the 30-km Chernobyl zone in Ukraine (outside the ChNPP industrial site, excluding the activity located in the radioactive waste storages and in the cooling pond) were estimated as: 90Sr--7.7 x 10(14) Bq; 137Cs--2.8 x 10(15) Bq; 154Eu--1.4 x 10(13) Bq; 238Pu--7.2 x 10(12) Bq; 239+240Pu--1.5 x 10(13) Bq; 241Am--1.8 x 10(13) Bq. These values correspond to 0.4-0.5% of their amounts in the ChNPP unit 4 at the moment of the accident. The current estimate is 3 times lower than the previous widely-cited estimates. Inventories of the fuel component radionuclides were also estimated in other objects within the 30-km zone and outside it. This allowed more accurate data to be obtained on the magnitude of a relative release of radionuclides in the fuel particles (FP) matrix during the Chernobyl accident outside the ChNPP industrial site. It amounts to 1.5+/-0.5% of these radionuclides in the reactor, which is 2 times lower than the previous estimates. Two-thirds of the radionuclides release in the FP was deposited on the territory of Ukraine.
Kashparov
V A
VA
Ukrainian Institute of Agricultural Radiology (UIAR), Mashinobudivnykiv str. 7, Chabany, Kyiv-Svjatoshin Distr., Kyiv Reg. 08162, Ukraine. vak@uiar.kiev.ua
Lundin
S M
SM
Zvarych
S I
SI
Yoshchenko
V I
VI
Levchuk
S E
SE
Khomutinin
Y V
YV
Maloshtan
I M
IM
Protsak
V P
VP
D004784:Environmental Monitoring; D011210:Power Plants; D011847:Radioactive Fallout / Q000032:analysis*; D018788:Radioactive Hazard Release; D011848:Radioactive Pollutants / Q000032:analysis*; D011868:Radioisotopes / Q000032:analysis*; D014455:Ukraine
D011847:Radioactive Fallout; D011848:Radioactive Pollutants; D011868:Radioisotopes