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Health Physics:
doi: 10.1097/HP.0000000000000070
Notes

Application of an Imaging Plate System to the Direct Measurement of a Fixed Surface Contamination

Hirota, Masahiro*†; Kimura, Keiji†‡; Sato, Rumi; Koike, Yuya§**; Iimoto, Takeshi; Tanaka, Satoru

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Abstract

An imaging plate (IP) system was used as an effective detector for direct measurement of radioactive surface contamination. The IP system displayed images designating the locations and extent of fixed surface contamination of uranyl acetate. The amount of radioactive waste produced during decontamination was reduced because the contaminated spots could be isolated; furthermore, creation of radioactive dust during removal of contamination was prevented because the contaminated spots could be removed without being pulverized. The images were used in efficiently and safely isolating the location of fixed surface contamination. The IP system surface contamination detection limit for uranyl acetate was 2.5 × 10−3 Bq cm−2, a value much lower than the surface contamination limit and the clearance level.

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