[Tissue free water tritium in pine needles around a nuclear power plant].
The elevation of the concentration of tissue free water tritium (TFWT) in pine needles was discernible in trees growing around a nuclear power plant. The values varied from 2.6 Bq/l to 6.1 Bq/l with a mean value of 3.8 Bq/l. Analysis of pine needles collected at Fukui City as control samples was done. The values averaged 1.7 Bq/l and fell within 1.5 B/l-1.8 Bq/l which was obtained nation-wide survey of TFWT in pine needles in Japan. The present study also revealed that reactor tritium incorporated into pine needles decreased rapidly with a half time of 6 days and then tissue free water tritium has a short retention time.
Fukui Prefectural Institute of Public Health, Japan.
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Tokuyama
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Igarasi
D007564:Japan; D009688:Nuclear Reactors; D011210:Power Plants; D011848:Radioactive Pollutants / Q000032:analysis*; D014197:Trees; D014316:Tritium / Q000032:analysis*
D011848:Radioactive Pollutants; D014316:Tritium