Evidence of stratospheric fallout of caesium isotopes from the Chernobyl accident
The Cs-137 an Cs-134 monthly deposition at Tsukuba through August 1987 are reported and the origins of caesium isotopes in spring 1987 are discussed. The monthly Cs-137 deposition increased to 131 Bq m/sup -2/ in May 1986 just after the reactor accident at Chernobyl, and thereafter it reached a minimum at the end of 1986. Cs-134, which is difficult to identify in the fallout from atmospheric nuclear weapon tests, has been detected in all fallout samples since May 1986, and it shows a trend similar to the Cs-137 deposition. The caesium isotopes fallout shows a maximum in spring 1987 due to the stratospheric fallout. In 1987, about 80 precent of the Cs-137 fallout came from Chernobyl radioactivity transported into the stratosphere, and 20 percent came from previous atmospheric nuclear tests. It is estimated that several times 10/sup -3/ of released caesium isotopes from the Chernobyl reactor have been transported into the stratosphere. copyright American Geophysical Union 1988
- Research Organization:
- Geochemical Research Division, Meterological Research Institute
- OSTI ID:
- 7144957
- Journal Information:
- Geophys. Res. Lett.; (United States), Journal Name: Geophys. Res. Lett.; (United States) Vol. 15:4; ISSN GPRLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Atmospheric-- Radioactive Materials Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACCIDENTS
ALKALI METAL ISOTOPES
ASIA
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CESIUM 134
CESIUM 137
CESIUM ISOTOPES
CHERNOBYLSK-1 REACTOR
EARTH ATMOSPHERE
ENRICHED URANIUM REACTORS
ENVIRONMENTAL TRANSPORT
FALLOUT
FALLOUT DEPOSITS
GEOCHEMICAL SURVEYS
GRAPHITE MODERATED REACTORS
HOURS LIVING RADIOISOTOPES
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPE RATIO
ISOTOPES
JAPAN
LWGR TYPE REACTORS
MASS TRANSFER
METEOROLOGY
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
POWER REACTORS
RADIOISOTOPES
RADIONUCLIDE MIGRATION
REACTOR ACCIDENTS
REACTORS
STRATOSPHERE
SURVEYS
THERMAL REACTORS
WATER COOLED REACTORS
YEARS LIVING RADIOISOTOPES