RADIOISOTOPES
Online ISSN : 1884-4111
Print ISSN : 0033-8303
ISSN-L : 0033-8303
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Volume 63, Issue 12
Displaying 1-3 of 3 articles from this issue
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Technical Report
  • Verification of Uranium 238 Quantity Calculated Using Waste Assay Systems
    Kaoru YOKOYAMA, Haruhi HATA, Yoshiyuki OHARA, Masaki NAGANUMA, Noritak ...
    2014 Volume 63 Issue 12 Pages 559-566
    Published: December 15, 2014
    Released on J-STAGE: December 27, 2014
    DOIhttps://doi.org/10.3769/radioisotopes.63.559
    JOURNAL OPEN ACCESS
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    The amount of 238U in uranium-contaminated waste drums generated in the decommissioning of nuclear facilities is evaluated from γ-ray measurement. We used the γ-ray measurement system made from CANBERRA(Qualitative and Quantitative(Q2) Low Level Waste Assay Systems) and measured the waste drums. This system assumes uniform distribution of uranium. But, homogeneity can not be checked with real waste drums. Authors developed the new analysis technique which calculates the amount of uranium by correcting the influence of uneven distribution of the uranium. As a result of evaluating using the new analysis technique, the error which influences quantitative value of 238U has been evaluated.
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Review Article
Applications of Stable Isotopes
  • Application of the Stable Isotope Breath Test for Digestive Disease Diagnosis and Therapeutic Effect
    Yukimoto ISHII
    2014 Volume 63 Issue 12 Pages 567-584
    Published: December 15, 2014
    Released on J-STAGE: December 27, 2014
    DOIhttps://doi.org/10.3769/radioisotopes.63.567
    JOURNAL OPEN ACCESS
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    To facilitate the use of the 13C breath test, we examined its usefulness in the diagnosis and pathological investigation of liver, pancreatic, and colon diseases and in the prediction of the antitumor effects of the anticancer agent S‐1.The 30-minute value of the L-[1-13C] phenylalanine breath test was useful for the pathological investigation of chronic liver diseases. The N-benzoyltyrosyl[1-13C] alanine breath test, useful for examination of the pancreatic exocrine function, facilitated the diagnosis of pancreatic exocrine disorders. The [1-13C] sodium butyrate enema breath test reflected the inflammatory activity of ulcerative colitis. The antitumor effects of the anticancer agent S-1 could be predicted using the [2-13C] uracil breath test 3h after the initial oral S-1 administration.
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Serial Lecture
Measurements and Evaluations of Air Dose Rates around Fukushima
  • III Characteristics of Environmental Gamma Rays and the Exposure Doses
    Kimiaki SAITO, Akira ENDO
    2014 Volume 63 Issue 12 Pages 585-602
    Published: December 15, 2014
    Released on J-STAGE: December 27, 2014
    DOIhttps://doi.org/10.3769/radioisotopes.63.585
    JOURNAL OPEN ACCESS
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    This article provides the fundamental information necessary for the appropriate evaluation of exposure doses in the environment. The basic characteristics of environmental γ rays from typical environmental sources are introduced; then, the dose conversion coefficients for the public at different ages are summarized which were obtained from the simulation considering the basic characteristics of environmental γ rays. Further, the variations of environmental exposure doses due to a variety of factors, and the relation of exposure doses to measured air dose rates are discussed.
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