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Radioactivity Survey Data in Japan Number 46 Sep. 1978 Contents Page

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Radioactivity Survey Data in Japan Number 46 Sep. 1978 Contents Page IliiiiilWiillff mmmm§mm§m$ Radioactivity Survey Data in Japan Number 46 Sep. 1978 Contents Page Part I DIETALY DATA • (1) Strontium-90 and Cesium 137 in Tea 1 (Japan Chemical Analysis Center) (2) Strontium-90 and Cesium-137 in Rice 3 (Japan Chemical Analysis Center) (3) Strontium-90 and Cesium-137 in Vegitables 6 (Japan Chemical Analysis Center) (4) Strontium-90 and Cesium-137 in Marine Products 12 (Japan Chemical Analysis Center) Part II THE 23RD NUCLEAR EXPLOSION TEST OF THE PEOPLE'S REPUBLIC OF CHINA (1) Gross Beta-Radioactivitv in Upper Air 17 (Japan Defence Agency) (2) Gross Beta-Radioactivity in Surface Air at Monitoring posts 19 (Japan Meteorological Agency) (Japan A tomic Energy Research Institute) (Prefectural Public Health Institute and Laboratories) (3) Gross Beta-Radioactivity in Rain and Dry Fallout 21 (Japan Meteorological Agency) (National Institute of Radiological Sciences) (Japan Atomic Energy Research Institutes) (Prefectural Public Health Institute and Laboratories) (4) Gross Beta-Radioactivity in Air-borne Dust 25 (Japan Meteorological Agency) (National Institute of Radiological Sciences) (Japan Atomic Energy Research Institute) (Prefectural Public Health Institute and Laboratories) (5) Radioactive Iodine Concentration in Raw Milk 29 (National Institutes under the control of Ministry of Agriculture and Forestry) (National institute of Radiological Sciences) (Prefectural Public Health Institute and Laboratories) (6) Hot Particles 31 (7) Analysis of Radionuclides 31 (8) Other Related Data 33 (Japan Meteorological Agency) Science and Technology Agency National Institute of Radiological Sciences Part 1 : DIETALY DATA (1) Strontium-90 and Cesium-137 in Tea (Japan Chemical Analysis Center) Japan Chemical Analysis Center has analyzed The ashed sampels were sent to Japan Chemical for strontium-90 and cesium-137 contents in Analysis Center and analyzed for strontium-90 processed-tea by the commission of Science and and cesium-137 contents using the method recom­ Technology Agency of Japanese Government. mended by Science and Technology Agency. Tea samples were collected by the prefectural Results obtained during the period from April Public Health Institutes and Laboratories of Shizu- 1975 to March 1977 are shown in Table 1. oka, Kyoto, and Kagoshima once a year. These The sampling locations are shown in Figure 1. samples were ashed at a temperature under 500°C. Table 1. ^Sr and 137Cs in Tea (Green tea) - April, 1975 to March, 1976 - (Japan Chemical Analysis Center) (Continued from Table 7, No. 41 of this publication) Component 90Sr 13: 'Cs Location Ash(%) Ca(%) K(%) pCi/kg S.U. pCi/kg C.U. May, 197S Shuzenji, SHIZUOKA 5.63 0.288 2.05 190 ±3 65 ± 1.0 240 ±5 12 + 0.3 Iwata, SHIZUOKA 5.13 0.315 1.80 46 t 1.5 14 * 0.5 75 ± 2.7 4.2 + 0.15 (Yosa-gun,) Kaya, KYOTO 5.22 0.223 1.79 150 ±3 46 ± 0.8 270 ±5 15 ± 0.2 (Kawabe-gun), Chiran, KAGOSHIMA 4.91 0.267 1.76 93 ± 2.0 35 ± 0.8 310 ±5 18 ± 0.3 (Satsuma-gun), Miyanojyo, 5.42 0.237 1.97 110 ±2 47 ± 1.0 230 ± 5 12 ±0.2 KAGOSHIMA June, 1975 Uji, KYOTO 5.54 0.269 2.02 120 ± 3 44 ± 0.9 190 ± 4 9.5 ± 0.21 April, 1976 Kagoshima, KAGOSHIMA 5.54 0.243 1.96 88 ± 4.1 36 ± 1.7 210 + 5 11 + 0.3 May, 1976 Shuzenji, SHIZUOKA 5.63 0.305 2.85 120 ± 5 38 ± 1.6 110± 4 3.7 ± 0.14 Uji, KYOTO 5.66 0.276 1.92 31 ± 3.0 11± 1.1 42 ± 3.1 2.2 ± 0.16 Kaya, KYOTO 5.83 0.372 2.05 120 ± 5 31 ± 1.2 130 ± 4 6.3 ± 0.21 Miyanojyo, KAGOSHIMA 4.61 0.209 1.59 55 ± 2.9 26 ± 1.4 88 ± 3.2 5.6 ± 0.20 June, 1976 Iwata, SHIZUOKA 5.12 0.286 1.75 94 ± 3.8 33 ± 1.3 83 ± 3.3 4.7 ± 0.19 Note: Ten grams of materials and ashes are used for analysis of radioactivity, respectively. (1) 140° 145°E 45° N Figure 1: 90Sr and ,37Cs in Tea (Green Tea) 1. Shuzenji 2. Iwata 3. Kaya (Yosa-gun) 4. Uji 5. Miyanojyo (Satsuma-gun) 6. Kagoshima 7. Chiran (Kawabe-gun) 135° SEA OF JAPAN 6 130° \P\ •35° 4*-: PACIFIC OCEAN •30° (2) (2) Strontium-90 and Cesium-137 in Rice (Japan Chemical Analysis Center) jJapan Chemical Analysis Center has analyzed grams of samples were ashed. These ashed samples for strontium 90 and cesium-137 contents in rice were sent to Japan Chemical Analysis Center and samples collected from 30 prefectures once a year analyzed for strontium-90 and cesium-137 con­ by the commission of Science and Technology tents, using the method recommended by Science Agency of Japan Government. and Technology Agency. Samples were obtained as processed rice from Results obtained during the period from April producing and consuming districts during the 1975 to March 1977 are s!iown in Table 2. harvest and the first sale period, respectiveJy. At The sampling locations are shown in Figure 2. each local public health laboratories, five kilo­ Table 2. 90Srand137Csin Rice - April, 1975 to March, 1977 - (Jpaan Chemical Analysis Center) Component "Sr 7Cs Location Ash(%) Ca(%) K(%) pCi/kg S.U. pCi/kg C.U. Sept. 1975 Mito, IBARAKI 0.416 0.0045 0.091 0.7 ±0.07 16 ± 1.7 10 ± 0.3 11 ±0.4 Oct. 1975 Maki (Nishikanbara-gun), NIIGATA 0.237 0.004 0.053 0.37 ±0.076 9.0 ±1.9 1.1 ±0.15 2.1 ± 0.28 Nov. 1975 Ishikari, HOKKAIDO 0.484 0.006 0.098 0.53 ±0.081 9.5 ±1.4 8.0 ± 0.3: 8.1 ± 0.34 Furukawa, MIYAGI 0.527 0.005 0.102 0.7 ±0.10 13 ±1.9 4.8 ±0.26 4.7+0.26 Kasuga, FUKUOKA 0.557 0.008 0.121 0.60 ±0.10 7.6 ±1.3 2.9 ±0.28 2.4 ± 0.23 Dec. 1975 Fukushima, FUKUSHIMA 0.374 0.006 0.062 0.38 ± 0.061 6.3 ± 1.0 9.1 ± 0.34 15 ± 0.6 Nodagawa (Yosa-gun,) KYOTO 0.351 0.006 0.O71 1.1 ±0.09 18 ± 1.4 5.0 ±0.33 7.1 ± 0.46 Akashi, HYOGO 0.427 0.005 0.082 0.5 ± 0.07 9.5 ± 1.4 0.7 ± 0.12 0.8 ± 0.14 Kochi, KOCHI 0.406 0.007 0.081 0.55 ±0.10 8.3 ±1.5 2.2 ±0.28 2.7 ± 0.35 Chikushino, FUKUOKA 0.537 0.006 0.094 0.29 ±0.090 4.5 ± 1.4 4.0 + 0.27 4.2 ± 0.29 jan. 1976 Yamaguchi, YAMAGUCHI 0.379 0.005 0.073 0.4 ±0.07 7.9 ± 1.2 2.2 ±0.15 3.0 ± 0.21 Oct. 1976 Mito, IBARAKI 0.646 0.007 0.089 1.1 ±0.41 17 ± 6.1 11 ± 0.6 13 ± 0.7 Maki (Nishikanbara-gun), NIIGATA 0.376 0.004 0.065 0.4 ±0.22 9.4 ±5.1 1.9 ± 0.22 3.0 ± 0.35 Hodaka (Minamiazumi-gun), NAGANO 0.629 0.008 0.095 0.1 ± 0.33 2.0 ± 4.4 0.3 + 0.30 0.3 ± 0.31 Nov. 1976 Fukushima, FUKUSHIMA 0.408 0.005 0.083 1.3 +0.35 25 ±6.6 8.8 ± 0.40 11+0.5 Yamaguchi, YAMAGUCHI 0.429 0.005 0.065 0.2 ± 0.23 4.4 ± 4.6 2.3 ± 0.26 3.5 ± 0.40 Dec. 1976 Furukawa, MIYAGI 0.382 0.004 0.O79 0.5 +0.23 12 ±5.5 2.1 ± 0.24 2.7 ± 0.30 Akashi, HYOGO 0.408 0.005 0.069 0.5 ± 0.21 9.7 ± 4.2 0.7 ± 0.20 1.0 ± 0.29 Dazaifu (Tsukushi-gun), FUKUOKA 0.349 0.004 0.071 1.0 ±0.12 24 ±2.9 1.4 ±0.19 1.9 ± 0.27 Jan. 1977 Ishikari, HOKKAIDO 0.374 0.003 0.089 0.2 ± 0.20 5.0 ± 5.7 3.5 ± 0.33 4.0 ± 0.36 (3) Component °Sr 7Cs uwwiiiuu Ash(%) Ca(%) K(%) pCi/kg S.U. pCi/kg C.U. Oct. J 975 Shinjyuku, TOKYO 0.444 0.006 0.102 0.82 + 0.10 13 ± 1.6 11 ± 0.4 11 ±0.4 Niigata, NIIGATA 0.399 0.006 0.087 0.58 ± 0.075 10 ± 1.3 2.8 ± 0.30 3.2 ± 0.34 Kanazawa, 1SHIKAWA 0.473 0.013 0.087 0.9 ± 0.09 6.9 ± 0.72 1.6 ±0.17 1.9 ± 0.19 Fukui, FUKUI 0.604 0.009 0.117 1.1 ±0.14 12 ± 1.5 4.7 ± 0.45 4.0 ± 0.39 Nov. 1975 Sapporo, HOKKAIDO 0.439 0.006 0.097 0.&8 ± 0.090 15 ± 1.6 11 ±0.4 11 ±0.4 Akita, AKITA 0.366 0.007 0.076 1.3 ±0.10 19 ± 1.4 14 ± 0.5 19 ± 0.7 Hodogaya, KANAGAWA 0.519 0.008 0.116 0.69 ±0.10 9.2 ± 1.3 11 ±0.5 9.7 ± 0.39 Osaka, OSAKA 0.392 0.006 0.078 0.77 ± 0.10 12 ± 1.5 4.4 ± 0.23 5.6 ±0.26 Saga, SAGA 1.28 0.009 0.280 1.2 ± 0.20 14 ± 2.2 4.4 ± 0.44 1.6 ±0.16 Kagoshima, KAGOSHIMA 0.396 0.004 0.075 0.7 ± 0.09 18 ±2.1 13 ± 0.4 18 ± 0.5 Dec.
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