Storage and migration of fallout strontium-90 and cesium-137 for over 40 years in the surface soil of Nagasaki
- Central Research Institute of Electric Power Industry, Chiba (Japan)
The vertical migration of {sup 90}Sr and {sup 137}Cs produced by the explosion of the atomic bomb in 1945 was investigated in an unsaturated soil layer in the Nishlyama am of Nagasaki. The in situ migration rates of {sup 90}Sr and {sup 137}CS were estimated to be 4.2 mm yr{sup -1} and 1.0 mm yr{sup -1}, respectively, when the rate of movement of soil water was 2500 mm yr{sup -1}. The in situ K{sub d} values of {sup 90}Sr and {sup 137}Cs were calculated to be 0.3 m{sup 3} kg{sub -1} and 1.2m{sup 3}kg{sup -1}, respectively. These are probably the only results that exist for the interaction between soil and {sup 137}Cs and {sup 90}Sr over 40 yr. Then results suggest that since fallout {sup 137}Cs and {sup 90}Sr have remained In the surface soil for a long period of time, we should pay significant attention to radiological effects of nuclear accidents such as the Chernobyl disaster.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 223873
- Journal Information:
- Journal of Environmental Quality, Journal Name: Journal of Environmental Quality Journal Issue: 4 Vol. 22; ISSN JEVQAA; ISSN 0047-2425
- Country of Publication:
- United States
- Language:
- English
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