Assessment of environmental impact of radioactive contaminations in the northern region of the Japan Sea by using experimental and modelling studies
Investigations of dynamics of radioactive pollution were carried out in 1990 - 1992 at the Ussury Bay of the Japan Sea. The detailed 8 seasonal hydrographic surveys with tracers sampling (H-3, Cs-137, Ra-226) and hydrometeorological observations of circumstances (wind field, precipitation, run-off) were made. Results of tritium and radiocaesium measurements in the surface water layer were compared with calculations on the base of three dimensional numeric modelling of these transport contaminations to verify an applied model. This numerical modelling of the radioactive pollution Propagation has been undertaken for the assessment of possible water medium contamination due radioactive sources in the southeastern part of the Ussury Bay. An assessment of the maximum radioactivity release into the environment due to an atomic submarine nuclear accident in 1985 gave values: 1.5 x 10{sup 9} Joules or 1.5 x 10{sup 19} fissions of U-235 nuclei, the maximum output of Cs-137 reached the value of 50mCi, and Sr-90 output was did not exceed 40mCi, which is ten times lower than the value of the standard release for PWRs and NPPs. The data of Cs-137 in surface sea water near Taiwan NPP N1-3 have been also received during the Russia-Taiwan sea expedition in 1992 at R/V {open_quotes}Ak.A. Vinogradov{close_quotes}.
- OSTI ID:
- 182143
- Report Number(s):
- CONF-940501-; ISSN 0003-018X; TRN: 96:006859
- Journal Information:
- Transactions of the American Nuclear Society, Vol. 70, Issue Suppl.1; Conference: 9. Pacific basin nuclear conference, Sydney (Australia), 1-5 May 1994; Other Information: PBD: 1994
- Country of Publication:
- United States
- Language:
- English
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