電子ポケット線量計に対する核融合施設電磁場の影響  [in Japanese] Effect of Electromagnetic Field in Fusion Facility on Electronic Personal Dosimeter  [in Japanese]

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Author(s)

Abstract

The effect of electromagnetic field on electronic personal dosimeters in a nuclear fusion facility was examined in a Magnetic Resonance Imaging (MRI) examination room instead of a nuclear fusion facility. Three types of electronic personal dosimeters, the PDM-111, the 112, and the 117, were used as typical ones. We surveyed the electromagnetic field distribution and dosimeters were placed at locations with various strengths of the electromagnetic field. The natural radiation dose was measured for about one week. We found that while dosimeters were not affected by the electric field, they were affected by the magnetic one. Dosimeters detected radiation levels less sensitively as the magnetic field strength was increased up to 150 mT. The dosimeters underestimated the environmental radiation dose rates by about 10-30% when the magnetic field strength was larger than 150 mT. We assumed that hall-effect caused the reduction in radiation sensitivity. We concluded that the strength of the magnetic field needs to be carefully considered when an electronic personal dosimeter is used for monitoring both personal and area dose in a nuclear fusion facility.

Journal

  • Japanese Journal of Health Physics

    Japanese Journal of Health Physics 45(1), 51-56, 2010-03-01

    Japan Health Physics Society

References:  15

Codes

  • NII Article ID (NAID)
    10026477966
  • NII NACSIS-CAT ID (NCID)
    AN00228458
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    03676110
  • NDL Article ID
    10691813
  • NDL Source Classification
    ZN36(科学技術--原子力工学・工業) // ZS45(科学技術--医学--放射線医学)
  • NDL Call No.
    Z16-696
  • Data Source
    CJP  NDL  J-STAGE 
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