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High resistance LED light for irradiation and chemicals

耐放射線LEDライトの開発

小林 雄樹 ; 船越 智雅; 篠崎 忠宏; 渡部 創  ; 矢島 裕史*; 正岡 秀樹*; 才谷 明宏*

Kobayashi, Yuki; Funakoshi, Tomomasa; Shinozaki, Tadahiro; Watanabe, So; Yajima, Hiroshi*; Masaoka, Hideki*; Saitani, Akihiro*

高レベル放射性物質研究施設(CPF)等の高放射性物質を取扱うホットセル内で使用されている水銀ランプは水俣条約により2021年から製造、輸出入が禁止されたことから、その代替品として近年の照明設備の主体となっているLEDランプを開発した。LEDランプの適用に当たっては、既存のLEDランプをベースに原子力施設に適用可能な腐食に強い構造・材料に変更した上で、放射線への影響及び硝酸ミストによる影響の有無を調査した。その結果、ホットセルにおいて使用可能な耐放射線性及び耐硝酸性を有し、かつ従来の水銀ランプによりも寿命が長く、低消費電力、発熱量の少ないLEDランプの開発に成功した。

The Chemical Processing Facility (CPF) has the concrete-shielded hot-cells using the mercury lamps. However, all the production, export and import of the mercury lamp have been prohibited since 2021 by the Minamata Convention on Mercury, and substitutes of the lamps are required. In this study, the LED lamps with high resistance against exposure to the irradiation and the chemicals are developed for a substitute of the mercury lamp. As the results, newly developed high resistance LED lamps can be operated continuously for more than 20 years under the environment in the respect of the irradiation resistance. Use of the LED lamps will reduce the operational cost and the amount of wastes of the facility. Practical demonstration of the lamps in the hot-cells of the CPF will be performed in near future. lamps will reduce the operational cost and the amount of wastes of the facility. Practical demonstration of the lamps in the hot-cells of the CPF will be performed in near future.

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