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イメージングプレートを利用したエアフィルタの捕集性能の簡易評価法

A Simple method evaluating collection performance of air filters with imaging plates

木内 伸幸 ; 大石 哲也 ; 吉田 真

Kinouchi, Nobuyuki; Oishi, Tetsuya; Yoshida, Makoto

粒子状放射性物質の空気中濃度測定に用いるフィルタの選択にあたっては、粒子捕集効率や表面捕集率といった捕集性能を考慮する必要がある。イメージングプレートを利用して捕集性能を簡易的に評価する方法を検討した。大気塵(ラドン崩壊核種)に対する種々のフィルタの捕集性能を比較し、評価方法の有用性を確認した。

Collection performance such as collection efficiency and surface colletion efficiency is considerably important in order to select a suitable filter for the measurement of the concentrations of airborne radioactive particles. A simple method with imaging plates is proposed to evaluate the collection performance of air filters. By comparing the collection performance of some filters with natural airborne radioactivity as a test aerosol, it was confirmed that the method could reliably evaluate the collection performance of filters.

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