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Title: Chernobyl nuclear accident hydrologic analysis and emergency evaluation of radionuclide distributions in the Dnieper River, Ukraine, during the 1993 summer flood

This report describes joint activities of Program 7.1.F, ``Radionuclide Transport in Water and Soil Systems,`` of the USA/Commonwealth of Independent States (CIS) Joint Coordinating Committee of Civilian Nuclear Reactor Safety to study the hydrogeochemical behavior of radionuclides released to the Pripyat and Dnieper rivers from the Chernobyl Nuclear Power Plant in Ukraine. These joint activities included rapid evaluation of radionuclide distributions in the Pripyat and Dnieper river system and field data evaluation and modeling for the 1993 summer flood to assist the Ukrainian government in their emergency response during the flood. In July-August 1993, heavy rainfall over the Pripyat River Catchment in Belarus and Ukraine caused severe flooding, significantly raising {sup 90}Sr concentrations in the river. Near the Chernobyl area, the maximum {sup 90}Sr concentration in the Pripyat River reached 20--25 PCi/L in early August; near the Pripyat River mouth, the concentration rose to 35 pCi/L. The peak {sup 90}Sr concentration in the Kiev Reservoir (a major source of drinking water for Kiev) was 12 pCi/L. Based on these measured radionuclide levels, additional modeling results and the assumption of water purification in a water treatment station, {sup 90}Sr concentrations in Kiev`s drinking water were estimated to be less than 8more » pCi/L. Unlike {sup 90}Sr, {sup 137}Cs concentrations in the Pripyat River during the flood did not rise significantly to the pre-flood levels. Estimated {sup 137}Cs concentrations for the Kiev drinking water were two orders of magnitude lower than the drinking water standard of 500 pCi/L for {sup 137}Cs.« less
Authors:
 [1] ;  [2] ;  [3]
  1. Ukrainian Hydrometeorological Inst., Kiev (Ukraine)
  2. Ukrainian Academy of Sciences, Kiev (Ukraine). Cybernetics Center
  3. Pacific Northwest Lab., Richland, WA (United States)
Publication Date:
OSTI Identifier:
10168428
Report Number(s):
PNL--9980
ON: DE94015596; TRN: 94:014723
DOE Contract Number:
AC06-76RL01830
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Jun 1994
Research Org:
Pacific Northwest Lab., Richland, WA (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; 54 ENVIRONMENTAL SCIENCES; CHERNOBYLSK-4 REACTOR; REACTOR ACCIDENTS; UKRAINE; FALLOUT; DNIEPER RIVER; RADIONUCLIDE MIGRATION; PRIPET RIVER; STRONTIUM 90; RADIOECOLOGICAL CONCENTRATION; CESIUM 137; EXPERIMENTAL DATA 220502; 210300; 570100; 540330; RADIOACTIVE EFFLUENTS; POWER REACTORS, NONBREEDING, GRAPHITE MODERATED; REAL ACCIDENTS; RADIOACTIVE MATERIALS MONITORING AND TRANSPORT