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Development of Glass Melter for the PNC Tokai Vitrfication Facility

ガラス固化技術開発施設のためのガラス溶融炉開発

虎田 真一郎; 佐々木 憲明; 堀江 水明; 角田 直己

not registered; Sasaki, Noriaki; not registered; Tsunoda, Naomi

東海再処理工場の運転に伴い発生する高レベル廃液を固化処理し,併せてプラント規模のガラス固化技術を実証する目的で,ガラス固化技術開発施設(TVF)の建設が進められている。 ガラス溶融炉は,ガラス固化プロセスの中心となる機器であり,構造上,運転上の信頼性を向上させるため,1977年以来ETF,MTFにおいて,実スケ-ルの溶融炉を用いた技術開発を行って来た。 本報では,溶融炉技術に関して,動燃で開発した成果が顕著である下記のテ-マを中心に,開発の経緯を述べる。 1)導電性スラッジの滞溜を防止する,炉構造及びガラス抜き出し技術。 2)ガラス繊維原料を用いる,液体供給メルタ技術(LFCM) 3)溶融炉の遠隔操作,及び廃メルタの遠隔解体技術。 これらの技術開発成果をTVFのプロセス設計に反映し,TVFの運転・保守の信頼性向上に結びつけた。 なお,本報はアメリカ原子力学会廃棄物トピカルミ-ティング"SPECTRUM'88"に於いて発表した。

The development of the glass melter which will be used in the HLLW vitrification facility has been performed since 1977. The design and operational experiences has been accumulated through the process tests in the cold engineering facilities. The results obtained in these periods have been considered in the design of the Tokai vitrification Facility (TVF), the construction of which has already been started in the spring of 1988. The present PNC melter system includes several features as the result of PNC's own improvements and modifications. The results of the melter development will be described in this paper mainly on the special features which are developed in PNC, such as glass fiber additives, induction-heated bottom drain nozzle and remote handling technique. The mock-up test using the new mock up melter which was constructed following the TVF final design has started to verify the process performance.

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