Japanese Journal of Health Physics
Online ISSN : 1884-7560
Print ISSN : 0367-6110
ISSN-L : 0367-6110
Search
Advanced search
OR
Browse
Search
Volume 33, Issue 2
Displaying 1-9 of 9 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • Problems in Applying New Internal Dose Coefficients to Radiation Control
    Yuichi SATO
    1998 Volume 33 Issue 2 Pages 113-117
    Published: 1998
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.5453/jhps.33.113
    JOURNAL FREE ACCESS
    Download PDF (789K)
  • Application of New Dose Coefficient to Occupational Dose and Public Dose Assessment in Japan
    Takumaro MOMOSE
    1998 Volume 33 Issue 2 Pages 118-120
    Published: 1998
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.5453/jhps.33.118
    JOURNAL FREE ACCESS
    Download PDF (459K)
  • Special Issnre: New Trend of Dosimeters for Radiation Management
    [in Japanese]
    1998 Volume 33 Issue 2 Pages 121-142
    Published: 1998
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.5453/jhps.33.121
    JOURNAL FREE ACCESS
    Download PDF (9373K)
  • The Concentration of Radioactivities in Concrete Materials in Japan
    Atsuo SUZUKI, Tadashi TSUJIMOTO, Yoichi SAKUMA, Koichiro NAGAMINE, Kaz ...
    1998 Volume 33 Issue 2 Pages 143-150
    Published: 1998
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.5453/jhps.33.143
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    To determine the concentration of radioactivity in materials constituting concrete in Japan, we carried out measurements of the components of concrete: steel, coarse aggregate, fine aggregate, cement, cement admixture, and water. Because the concentrations of radioactivity of steel, cement admixture, and water are far less than those of the other components, we measured only coarse aggregate, fine aggregate, and cement. The results of the measurements are found to lie in a wide range from 6.8-912.5 (average 516.9) Bq/kg for K-40, 2.93-86.7 (average 38.8) Bq/kg for U-238, and 1.59-61.6 (average 23.9) Bq/kg for Th-232. The results proved that the concentrations of radioactivity of components in concrete in Japan are lower than those in other countries. The radioactivity concentration in concrete according to geographic region showed nearly the same distribution pattern as the intensity of gamma rays from soil.
    View full abstract
    Download PDF (2463K)
  • The Fate of 137Cs in the Coastal Seas of Japan and the Resultant Dose from Intake through Fishery Products
    Teruhisa WATABE, Mitsue MATSUBA, Setsuko YOKOSUKA
    1998 Volume 33 Issue 2 Pages 151-161
    Published: 1998
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.5453/jhps.33.151
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The relationship between the flux of the atmospheric 137Cs at the surface of the seas and its concentration in seawater was studied to elucidate its fate in the marine environment and to assess the radiological effects on the human population. In this context, a simplified mathematical model that expressed the time course of the concentration in the first order of kinetics was introduced, and the parameters involved in the formula were numerically derived for three regions of the coastal sea of Japan by a regression analysis from a series of radioactivity survey data reported over the past 30 years since 1960. It is expected that 137Cs was retained in the coastal sea of Japan with a half-life period ranging from 5.3 to 6.8 years without a great difference between the Pacific Ocean and the Sea of Japan. The integrated concentrations of 137Cs in seawater were determined as 0.191, 0.173, and 0.120mBq·a/l, respectively, for the coasts of Ibaraki/Fukushima, Niigata, and Fukui prefectures as a result of the deposition at a unit density (1MBq/km2). The resultant dose commitment to the respective populations would amount to 4.5, 2.4, and 0.9×10-3man·Sv through coastal fishery products.
    View full abstract
    Download PDF (1382K)
  • Concentration of Medically Used Radionuclides in Activated Sludge at the Megalopolis Waste Water Treatment Plants and Estimation for the Effective Dose
    Takashi SUZUKI, Yasuhiro OKANO, Shiroharu SUGIURA, Yukio INOKOSHI
    1998 Volume 33 Issue 2 Pages 163-170
    Published: 1998
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.5453/jhps.33.163
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The concentrations of medically used radionuclides in activated sludge samples were measured for 10 waste water treatment plants (WWTP) in Tokyo from October 1983 to March 1994. The nuclides 99mTc, 67Ga, 111In 123I 131I and 201Tl, among others, could be detected, but these concentration levels were lower than the legal concentration limits in Japan. The excess activated sludge is usually incinerated at WWTP; then the resulting ash is transported for reclamation in Tokyo Bay. Internal and/or external exposure doses were evaluated for the following cases: (1) The dose of the public attributed to radioactive iodine and 201Tl, which were released from the incinerator by burning sludge; (2) The dose of the workers during the process of transport and reclamation of the ash. As a result, the effective doses were sufficiently lower than the dose limit 1mSv/y. The decay of the radionuclides were calculated over a period of curing of the landfill. It was found that the radionuclides had decayed out to approximately one nuclide. The effective dose of the public can therefore be ignored. Moreover, it was clarified that the effective dose of the public resulting from 99Tc is negligibly low in value at the present time.
    View full abstract
    Download PDF (1072K)
  • Decontamination of Radioactive Materials (Part II)
    Makoto AKASHI, Satoshi SHIMOMURA, Misao HACHIYA
    1998 Volume 33 Issue 2 Pages 171-188
    Published: 1998
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.5453/jhps.33.171
    JOURNAL FREE ACCESS
    Download PDF (2258K)
  • Present Situation of Environmental Radiation Monitoring in Taiwan and Japan
    Naoto FUJINAMI
    1998 Volume 33 Issue 2 Pages 189-194
    Published: 1998
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.5453/jhps.33.189
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The present situation regarding environmental radiation monitoring observed by the author at the Taiwan Radiation Monitoring Center in June 1997 is discussed. These observations are then compared with the current situation in Japan. An outline of the Taiwanese situation is as follows: 1) All organizations operating and supervising nuclear industries and monitoring the environment around the facilities belong to the government. 2) It has become difficult to deepen the public's comprehension concerning the results of radiation monitoring. 3) Cobalt-60 has been detected in environmental samples from soil and indicator plants around nuclear power stations. 4) It is desirable that collaborative studies between Taiwan and Japan be promoted in this field. Procedures are reviewed with which each prefectural radiation monitoring authority in Japan assesses and evaluates public exposure to radiation and radioactive materials in the environment that result from the operation of nuclear facilities. Although several small differences are evident in the procedures, the primary objective of environmental monitoring remains constant. That is, every procedure is satisfactory to ensure that public exposure to radiation is well below the limit, thus, protecting public health and safety in the vicinity of nuclear facilities.
    View full abstract
    Download PDF (799K)
  • Legislation in Ukraine to Manage the Radiological Consequences of the Chernobyl Accident
    Oleg NASVIT, Tetsuji IMANAKA
    1998 Volume 33 Issue 2 Pages 195-210
    Published: 1998
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.5453/jhps.33.195
    JOURNAL FREE ACCESS
    Download PDF (2010K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top