Evaluation of Protection Factors of a Breath-Responsive-Powered Air-Purifying Respirator

  • NAKAGAWA Masahiro
    Department of Radiation Protection, Tokai Research and Development Center, Nuclear Science Research Institute, Japan Atomic Energy Agency
  • NOJIMA Shun
    Department of Radiation Protection, Tokai Research and Development Center, Nuclear Science Research Institute, Japan Atomic Energy Agency
  • FUJII Katsutoshi
    Department of Radiation Protection, Tokai Research and Development Center, Nuclear Science Research Institute, Japan Atomic Energy Agency
  • SHISHIDO Nobuhito
    Department of Radiation Protection, Tokai Research and Development Center, Nuclear Science Research Institute, Japan Atomic Energy Agency
  • SAKAI Toshiya
    Department of Radiation Protection, Tokai Research and Development Center, Nuclear Science Research Institute, Japan Atomic Energy Agency
  • UMEHARA Takashi
    Department of Radiation Protection, Tokai Research and Development Center, Nuclear Science Research Institute, Japan Atomic Energy Agency
  • SHIMIZU Isamu
    Department of Radiation Protection, Tokai Research and Development Center, Nuclear Science Research Institute, Japan Atomic Energy Agency

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Other Title
  • 呼吸追随型電動ファン付全面マスクの防護性能試験
  • コキュウ ツイズイガタ デンドウ ファン ツキ ゼンメン マスク ノ ボウゴ セイノウ シケン

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Abstract

It is essential to wear an air-purifying respirator in the radiation works in a contaminated atmosphere. A breath-responsive-powered air-purifying respirator (BR-PAPR) has been recently developed. However, no research has yet been conducted to determine the protection factor (PF) of the BR-PAPR in actual workplaces. In this study, the PFs of the BR-PAPR were measured by a man-test apparatus and compared with those of a non-powered full face mask. The PFs were measured under three different situations; normal wearing condition, clogging the filter and leaving a gap between the face and the mask. Under these situations, it was found that the PFs of the BR-PAPR are higher than those of the non-powered full face mask. PFs greater than 4,000 were obtained for 95% of the subjects who wear the BR-PAPR, and PFs over 6,667, the upper limit of the man-test apparatus, were obtained for 49% of them. The questionnaire survey was conducted for workers. The results showed that the workers feel a reduced burden when they wear the BR-PAPR. The results of this study showed high protection performance and operation efficiency of the BR-PAPR.

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