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Related Experiment Videos

Development of advanced-type multi-functional electronic personal dosemeter.

T Nunomiya1, S Abe, K Aoyama

  • 1Fuji Electric Systems Co., Ltd. Fuji-machi, Hino, Tokyo, Japan. nunomiya-tomoya@fesys.co.jp

Radiation Protection Dosimetry
|August 21, 2007
PubMed
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A new electronic personal dosemeter uses silicon detectors to measure gamma and neutron radiation for nuclear workers. This device accurately assesses personal dose equivalents (Hp(10)) for improved radiation safety.

Area of Science:

  • Nuclear Engineering
  • Radiation Detection and Measurement
  • Solid-State Physics

Background:

  • Occupational radiation dose management is critical in nuclear power plants and accelerator facilities.
  • Existing dosimetry methods may have limitations in simultaneously measuring different radiation types.
  • Advanced electronic personal dosemeters are needed for real-time dose monitoring.

Purpose of the Study:

  • To develop and evaluate a compact, multi-functional electronic personal dosemeter for simultaneous measurement of personal gamma and neutron dose equivalents (Hp(10)).
  • To assess the performance of silicon semiconductor detectors for neutron dosimetry.

Main Methods:

  • Development of a small, lightweight electronic personal dosemeter incorporating silicon semiconductor radiation detectors.

Related Experiment Videos

  • Utilized two types of silicon sensors: a slow-neutron sensor (<1 MeV) with a boron layer and a fast-neutron sensor (>1 MeV) with amorphous silicon hydride.
  • Evaluated neutron energy response using a monoenergetic neutron source (250 keV to 15 MeV) and compared with ICRP Publication 74 conversion coefficients.

    • Main Results:

    • The developed dosemeter measures personal gamma and neutron dose equivalents (Hp(10)) simultaneously.
    • Achieved Hp(10) response for neutrons within +/-50% difference in the energy range of 250 keV to 4.4 MeV.
    • The device is compact (62 x 82 x 27 mm³) and lightweight (approx. 130 g).

    Conclusions:

    • The advanced electronic personal dosemeter shows promising capabilities for occupational dose management.
    • Silicon semiconductor detectors are effective for simultaneous gamma and neutron personal dose equivalent measurements.
    • This dosemeter offers a practical solution for radiation safety in nuclear facilities.