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Report No.

On-line evaluation of spatial dose-distribution by using a 15m-long plastic scintillation-fiber

Notomi, Akihiro*; Sugiura, Nobuyuki*; Ito, Tetsuo*; Imamichi, Shoji*; Torii, Tatsuo ; Noma, Hiroshi*

A 15 m-long plastic scintillation fiber (PSF) detector has been applied to the on-line evaluation of spatial dose-distribution inside the room of a low power research-reactor. It was found that the present PSF detector has enough performance as the real-time measurement system which is not only quick and simple but also reliable for monitoring use in that situation. Such application may be also useful at the medical fields which routinely use radio isotopes for diagnosis purposes (such as PET facility). From the present observation, it seems that the practically-acceptable maximum limit of PSF length is at most 15 m. More than this, the severe signal reduction brings unavoidable difficulties for the following signal processing.



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