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Responses of commercially available neutron electronic personal dosemeters in neutron fields simulating workplaces at MOX fuel fabrication facilities

MOX燃料施設作業場模擬減速中性子場における市販電子式中性子個人線量計の特性評価

辻村 憲雄  ; 吉田 忠義 ; 高田 千恵 

Tsujimura, Norio; Yoshida, Tadayoshi; Takada, Chie

三種類の市販電子中性子個人線量計(EPD)について、その中性子線量当量評価性能を調査し、MOX燃料施設作業場への適応性について検討した。本研究で使用したEPDは、NRY21(富士電機システム),PDM-313(アロカ)及びDMC 2000 GN(MGP Instruments)であり、MOX燃料施設作業場と同様のスペクトルを持つ減速中性子校正場で試験した。その結果、作業場における中性子スペクトル変化に対応したそれぞれの線量計のレスポンス変化の傾向及び大きさを明らかにした。

The authors investigated the performance of three commercially available electronic personal dosemeters (EPDs) in evaluating neutron dose equivalents and discussed their suitability to work environments in MOX fuel fabrication facilities. The EPDs selected for this study were NRY21 (Fuji Electric Systems), PDM-313 (Aloka) and DMC 2000 GN (MGP Instruments). All tests were conducted in moderated $$^{252}$$Cf neutron fields with neutron spectral and dosimetric characteristics similar to those found in MOX fuel facilities. The test results revealed that all three models demonstrate a performance within a reasonably acceptable accuracy (a factor of 2) in practical use. The test results also suggested that the accuracy of some EPDs can be improved with a judicious selection of calibration sources.

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パーセンタイル:20.43

分野:Nuclear Science & Technology

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