Japanese Journal of Health Physics
Online ISSN : 1884-7560
Print ISSN : 0367-6110
ISSN-L : 0367-6110
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Volume 46, Issue 4
Displaying 1-17 of 17 articles from this issue
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Color Topics
Foreword
Special Articles
Current Topics
Original Paper
  • Predictive Analysis of the Radiation Exposure for the Primary Cooling System of the Rated Power Operation of MONJU
    Youichirou MATUO, Masanori HASEGAWA, Yoshiharu MAEGAWA, Shinya MIYAHAR ...
    Article type: Original Paper
    2011 Volume 46 Issue 4 Pages 304-313
    Published: 2011
    Released on J-STAGE: August 22, 2012
    DOIhttps://doi.org/10.5453/jhps.46.304
    JOURNAL FREE ACCESS
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    Radioactive corrosion products (CP) are main source of personal radiation exposure during maintenance without fuel-failure accident in the Liquid-Metal Fast Breeder Reactor (LMFBR) plants. In order to establish the techniques of radiation dose estimation for personnel, program system “DORE” has been developed. The DORE system is constructed by PSYCHE code and QAD code system. The density of each deposited CP of primary coolant system in MONJU was estimated by using the PSYCHE. Moreover, the QAD-CGGP2R code is applied to dose rate calculations for the primary coolant system in MONJU. The dose rate around primary piping system was visualized using AVS software. The predicted values were estimated to be saturated at 2-3 mSv/h in twenty years after the start of operation, and the dose rate reaches 4 mSv/h in domains near the IHX and the cold-leg piping. It has been assumed that the main radiation source is 54Mn in the IHX, primary pump and cold-leg piping region. On the other hand, it was indicated that the contribution to dose rate of the 60Co accounted for approximately 23% in the hot-leg piping region.
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Technical Data
  • JISCARD GUI, A Graphical Interface Application for Simple and Quick Calculation of Aviation Route Doses
    Martin ANDERSSON, Susumu RYUFUKU, Hiroshi YASUDA
    Article type: Technical Data
    2011 Volume 46 Issue 4 Pages 314-320
    Published: 2011
    Released on J-STAGE: August 22, 2012
    DOIhttps://doi.org/10.5453/jhps.46.314
    JOURNAL FREE ACCESS
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    Pilots, flight attendants, and passengers aboard jet aircrafts are subjected to higher cosmic radiation levels at high altitude than on the ground. Additional dose, received during flight is called “aviation route dose”. Addressing the needs for precise and easy determination of aviation route doses (Sv), the authors have developed a new application ‘JISCARD GUI’ with a graphical user interface which provides dose rate (Sv/h) distribution along a flight route and aviation route dose. The graphical interface made with Adobe Flash provide functions to select airports on dynamic map or to search by airport/city names, and to report resulting aviation route doses and graphs of dose rate change through a flight. Dose rate data at several cut off rigidity, Rc and force field potential, FFP were calculated in advance using a PHITS-based analytical model and stored in the server as matrix data. Upon user's request of departure/arrival airports and flight date, interpolation using matrix data substantiates derivation of dose rate distribution in a simple and quick manner with sufficient accuracy. Precision of the dose calculation was verified by comparison with JISCARD EX (MS-Excel version) released in September 2008. This advanced application will be open to public through the website of the National Institute of Radiological Sciences in the near future.
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