Performance of an Improved Air Sampler for Collecting Airborne Radioiodine
スポンサーリンク
概要
- 論文の詳細を見る
An airborne radioiodine sampler composed of cellulose asbestos filter paper (HV-70 or HE-40), charcoal-impregnated filter paper (CP-20B) and two charcoal cartridges (CHC-50) was devised with the aim of ensuring higher and more reproducible collection efficiencies under high humidity conditions encountered in routine air monitoring. This paper describes the results of tests conducted on this sampler to determine its performance in collecting airborne 131I released from an iodine processing cell in the author's institute, and discusses the factors affecting the collection efficiency.<BR>The results are summarized as follows:<BR>(1) The sampler is notably superior in performance to current forms consisting of single filter medium in that the collection efficiency is far less dependent on relative humidity. Its col-lection efficiency is maintained at more than 75% on the average during a long sampling period of 24 hr even under very high humidity conditions.<BR>(2) During a short sampling period of 30 min the collection efficiency exceeds 0% for the airborne iodine sampled at the exit of an air cleaning system containing charcoal filters, . while the efficiency reaches almost 100% for the unfiltered iodine under conditions of rela-tive humidity ranging from 40 to 60%.<BR>(3) The collection efficiency is not affected significantly by face velocity.<BR>(4) The desorption of iodine collected in the sampler depends sensitively on relative humidity.
- 一般社団法人 日本原子力学会の論文
著者
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FUKUDA Seiji
Oarai Research Establishment, Japan Atomic Energy Research Institute
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NARITOMI Mitsuo
Tokai Research Establishment, Japan Atomic Energy Research Institute