文章基本信息

标题：放射能温泉の衛生化学的研究(第2報) : 三朝温泉の温泉水中の天然放射性核種について
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作者：亀谷勝昭 ; 城戸靖雅 ; 長谷川明等
期刊名称：Journal of Health Science
印刷版ISSN：1344-9702
电子版ISSN：1347-5207
出版年度：1970
卷号：16
期号：1
页码：9-14
DOI：10.1248/jhs1956.16.9
出版社：The Pharmaceutical Society of Japan
摘要：For investigation of the natural level of radioactivity, the samples of hot spring water at Misasa spa area were collected several times from June 1963 to December 1965, and concentration of ²²⁶Ra, natural U, ²²²Rn, Ca ion, Cl ion, SO₄ ion were determined. The sampling places were distributed to cover all area of spa in order to know the mean value of radioactivity level. Among those 15 sampling places, springs containing rather higher concentration of radioactive nuclides were crowded at the center part of Misasa area, corresponding to the north side of Santoku river. Besides, the concentration of ²²⁶Ra in spring water was far higher than the radioactive equilibrium value calculated from the content of natural U. The habitants in this area have a custom to drink the spring water usually, so hygienic problem was discussed comparing the maximum permissible concentration recommended by ICRP and NBS in the USA conveniently. The mean value of natural U was 2 μg/liter, and that of ²²⁶Ra was 5.4 pCi/liter. Comparing with 1/30 of the maximum permissible concentration in water for occupational people which was recommended by ICRP, the concentration of natural U was much lower, but the value of ²²⁶Ra was near to 1/30 of recommended concentration. The mean value of the concentration of ²²⁶Rn in spring water was 1.5×10^-2 μCi/liter and much higher than 1/30 of the maximum permissible concentration recommended by NBS.