The Long-Term Decrease of super(90)Sr Availability in the Environment and Its Transfer to Man After a Nuclear Fallout

The long-term decline in radioactivity concentration in all foodstuffs relevant for human internal exposure after severe strontium 90 fallout was monitored. Austrian data collected during 1960-74, and immediately before and after the April 1986 nuclear accident in Chernobyl, Ukraine, show observed e...

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Bibliographic Details
Published in:Radiation protection dosimetry 2001-01, Vol.94 (3), p.251-251
Main Authors: Muck, K, Sinojmeri, M, Whilidal, H, Steger, F
Format: Article
Language:English
Online Access:Get full text
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Summary:The long-term decline in radioactivity concentration in all foodstuffs relevant for human internal exposure after severe strontium 90 fallout was monitored. Austrian data collected during 1960-74, and immediately before and after the April 1986 nuclear accident in Chernobyl, Ukraine, show observed effective half-lives of 1.8-2.1 yr in the first 2-3 yr after the end of fallout and 8-10 yr in the following 30 yr. Due to the decline in super(90)Sr availability, the average annual activity intake in Austria has fallen from 840 Bq at the climax of the nuclear weapons tests to about 42 Bq in 1997 for adults, and from 500 Bq to 35 Bq for 1-yr old infants. These values are equivalent to a super(90)Sr ingestion dose of 1.2 and 2.5 mu Sv for adults and infants, respectively, in 1997.
ISSN:0144-8420