著者
須賀 新一 市川 龍資
出版者
日本保健物理学会
雑誌
保健物理 (ISSN:03676110)
巻号頁・発行日
vol.35, no.4, pp.449-466, 2000 (Released:2010-02-25)
参考文献数
31
被引用文献数
8 5

This paper describes the revised index levels of the control of food and water in the Nuclear Safety Commission guidelines, “Off-Site Emergency Planning and Preparedness for Nuclear Power Plants, etc.” Food and water are divided into five categories, and the consumption of each has been conjectured. For this purpose, a nationwide survey for nutrition in Japan by the Welfare Ministry and a survey on the food of infants and children in the coastal area of Ibaraki Prefecture by the National Institute of Radiological Sciences are considered. These categories are (1) drinking water, (2) milk and dairy products, (3) vegetables, (4) grain, and (5) meats, egg, fish, shellfish, and others. The radionuclides groups are then chosen in consideration of their potential importance in regard to food and water contamination. Those chosen were, (1) radio-iodine, (2) radioactive cesium and strontium, (3) uranium, and (4) plutonium and alpha-rayemitting transuranic radionuclides. The intervention dose levels of 5mSv of effective dose and 50mSv of committed equivalent dose to the thyroid for radio-iodine for a period of one year were adopted. The radioactivities of 131I, 132I, 133I, 134I, 135I, and 132Te are assumed to be proportional to the contents in nuclear fuel after a cooling time of 0.5 day, and the radioactivity of 131I is taken as a scale that represents the level of control on the ingestion of food and water. Based on doses to infants, whose exposure is highest, the levels of control are recommended to be 300Bq/kg or more for drinking water and milk and other dairy products, and 2, 000Bq/kg or more for vegetables, except edible roots and potatoes. It is assumed that radio-cesium released in the environment is accompanied by strontium radio-nuclides with a 90Sr/137Cs radioactivity ratio of 0.1, taking into account the past measurements of fallout. Radio-nuclides are assumed to contain 137Cs, 134Cs, 90Sr, and 89Sr with the same mixing ratio as that of the fuel in a nuclear reactor. The sum of radioactivity of 134Cs and 137Cs is used as a scale that represents the level of control, and the yearly average concentration in food and water is presumed equal to half the concentration of those in the peak term. It has then been recommended that the levels of control for radio-cesium should be 200Bq/kg or more for drinking water and milk and other dairy products, and 500Bq/kg or more for vegetables, grain, meat, eggs, and fish. Moreover, in special cases, measurements on radio-strontium are necessary if a nuclear power reactor operates for less than two years because the ratio of 89Sr radioactivity is much higher than in reactors with longer times of operation. For uranium, the index levels are presented in terms of alpha-activity concentration: 20Bq/kg or more for drinking water and milk and other dairy products, and 100Bq/kg or more for vegetables, grain, meat, eggs, and fish. The sum of the radioactivity concentration of 238Pu, 239Pu, 240Pu, 242pu, 241Am, 242Cm, 243Cm, and 244Cm is selected as a scale for representing the levels of control on food and water for plutonium and other transuranic radionuclides. The level of control has been recommended as 1Bq/kg or more for drinking water and milk and other dairy products, and 10Bq/kg or more for vegetables, grain, meat, eggs, and fish. For commercially available food for babies, the recommended level of control is 1Bq/kg or more in a cooked form and served as a meal for plutonium and other transuranic radionuclides.

言及状況

外部データベース (DOI)

Yahoo!知恵袋 (1 users, 1 posts)

事故以前は、なかったはずです。 あったのは、チェルノブイリ以降の輸入品暫定規制値370Bq/kg。 それと、総量規制(食品・水・空気全てで)の1mSv/年。 個別の規制値はなかったと思います。 原発以後の、暫定規制値500Bq/kg(米)は、 2000年にすでに作られていた案そのままです。 これは、全体で20mSv/年、食品からは5mSv/年として、 ...

はてなブックマーク (1 users, 1 posts)

Twitter (14 users, 19 posts, 7 favorites)

若干、記憶が曖昧になってきているので読み直し。論文(無料)「防災指針における飲食物摂取制限指標の改定について」 https://t.co/3VNe2SMWKN  2000年、須賀新一、市川龍資。防災指針で仮定されている核種比(Sr-90/Cs-137 等)などについて。
魚貝類Sr検出状況 http://t.co/kHWEcQ6uhQ 川海老も唐揚げ等で食べるし、貝殻Caなど麺に添加や飼料にもRT@miakiza20100906 厚労省Sr-90/Cs-137 = 0.1 と仮定 https://t.co/HeLnvkGmik 452~453
Sr-90/Cs-137 = 0.1 と仮定。「防災指針における飲食物摂取制限指標の改定について」 https://t.co/fUZZFgfv7b (須賀ら,2000年)の 452~453 ページあたり。 @irukatodouro
@birdtaka この旧暫定規制値として使われた飲食物摂取制限指標http://t.co/sFpMd09CGU で残念なのは、すでに存在していた輸入食品用の暫定基準値(http://t.co/gFdbcKXY3u p.43)と全く無関係に設定されてしまったこと。
@kazooooya 昨日は失礼しました。J-STAGEのサーバーメンテナンスが終わり、リンクが復活しました。須賀 新一, 市川 龍資「防災指針における飲食物摂取制限指標の改定について 」保健物理 35:443-447 (2000) http://t.co/sFpMd0rLV2

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