Plutonium and americium in the environment
- 1. Geochemistry Research Association, Tokyo (Japan)
Description
Up to now, 0.4 MCi of sup(239 + 240)Pu was released by nuclear bomb testings, of which 0.3 MCi was injected into the stratosphere. Since 1958, the monthly deposition of 238Pu and sup(239 + 240)Pu was determined in our laboratory in Tokyo. The cumulative amount of deposition of sup(239 + 240)Pu in Tokyo was 1.2 mCi/km2. The maximum fall rate of 200 μCi/km2,y was observed in 1963. Due to the release of 238Pu from a satellite failure in the spring 1964, the ratio of 238Pu to sup(239 + 240)Pu which was 4.0% on an average, increased to 16% in 1967. The alpha activity of 241Am, a daughter of 241Pu, in deposits of 1962 and 1963 was observed to be 20% of sup(239 + 240)Pu now. The results of study on the distribution of plutonium isotopes and americium in the Pacific, Indian and Southern Oceans are also presented. (author)
Additional details
Publishing Information
- Publisher
- Japanese Association for Radiation Research.
- Imprint Place
- Tokyo, Japan
- Imprint Title
- Proceedings of the 6th international congress of radiation research
- Imprint Pagination
- 1025 p.
- Journal Page Range
- p. 940-948.
Conference
- Title
- 6. international congress of radiation research.
- Dates
- 13 - 19 May 1979.
- Place
- Tokyo, Japan.
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 13661451
- Subject category
- S58: GEOSCIENCES;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- AMERICIUM 241; ANNUAL VARIATIONS; ENVIRONMENT; FALLOUT DEPOSITS; JAPAN; NUCLEAR EXPLOSIONS; PLUTONIUM 238; PLUTONIUM 239; PLUTONIUM 240
- Descriptors DEC
- ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; AMERICIUM ISOTOPES; ASIA; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; EXPLOSIONS; FALLOUT; HEAVY NUCLEI; ISOTOPES; NUCLEI; ODD-EVEN NUCLEI; PLUTONIUM ISOTOPES; RADIOISOTOPES; VARIATIONS; YEARS LIVING RADIOISOTOPES