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Yasuda, Ichiro; Okamoto, Masafumi; Amamoto, Ippei
PNC TN6440 91-059, 69 Pages, 1991/09
It was carried out by the joint research of pnc and unitika ltd. To developthe chelate resins which adsorb selectively the impurities in the hydro-chloric acid solution dissolving yellow cake. Unicellex ur-50(unitika), one of the chelate resins, fits for the pncprocess as the result of these experiments. A medium-scale facilities which purify uranium solution by using ur-50 wasbuilt and it was operated smoothly.
Yasuda, Ichiro; Okamoto, Masafumi; Takanobu, Osamu; Kikuchi, Toshiaki; Yamashita, Takayuki*
PNC TN6410 91-037, 11 Pages, 1991/06
None
Okuno, Yasuki; Okamoto, Tamotsu*; Goto, Yasuhito*; Akiyoshi, Masafumi*; Imaizumi, Mitsuru*; Kobayashi, Tomohiro*
no journal, ,
A solar cell type detector has features such as a thin film structure and no power supply drive by an internal electric field, and it is considered to be useful in a 1 F decommissioning environment. In this presentation, radiation behavior of InGaP and CdTe solar cells with high radiation resistance are reported.
Okuno, Yasuki; Imaizumi, Mitsuru*; Okamoto, Tamotsu*; Kobayashi, Tomohiro*; Akiyoshi, Masafumi*; Goto, Yasuhito*
no journal, ,
In the decommissioning of Fukushima Daiichi Nuclear Power Plant, it is important to specify the distribution and composition of the fuel debris by alpha ray dose analysis. InGaP solar cells is expected to detect alpha-rays because they have the thickness of about one micro meter, which is sufficiently thin with respect to the fly range of alpha-rays. Therefore, the ion irradiation tests with 5 MeV helium was conducted on InGaP solar cells, and the applicability of InGaP solar cells for alpha-ray detector was evaluated and discussed with the results of the experiment and simulation.
Okuno, Yasuki; Imaizumi, Mitsuru*; Okamoto, Tamotsu*; Kobayashi, Tomohiro*; Akiyoshi, Masafumi*; Goto, Yasuhito*
no journal, ,
The Fukushima Daiichi Nuclear Power Station needs to measure the high-level radiation environment near the core, but the ionization chamber, which is the existing product, has limited space where it can be used due to "size", "sensitivity", and "power supply". At present, the information of dose distribution and the estimation of debris position are not sufficiently obtained. Therefore, we have been developing a solar cell type radiation dosimeter as a powerless dosimeter instead of an ionization chamber. In this presentation, we will report on the development of a solar cell self-induced current dosimeter based on the current behavior, degradation behavior, temperature characteristics, etc. that have been elucidated so far.
