検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

乾式ワイヤーソー切断工法を用いた貫通配管の撤去

Removal of penetrating pipes by dry wire-saw technology

明道 栄人; 小林 忠義; 富居 博行

Myodo, Masato; Kobayashi, Tadayoshi; Tomii, Hiroyuki

再処理特別研究棟廃液長期貯蔵施設内の一部の壁貫通配管について、小型の乾式ワイヤーソー切断工法を用いてコンクリートを切断し安全に撤去した。撤去した配管を含むコンクリートは、静的破砕剤を充填し破砕させ、二次破砕を行うことにより配管とコンクリートを効率的に分離した。本作業において、乾式ワイヤーソー切断工法に関する作業データを分析し、貫通配管の撤去における乾式ワイヤーソー切断工法の妥当性を評価した。さらに、静的破砕剤が貫通配管とコンクリートに破砕分離する手段として有効であることを確認するとともに、効果的に破砕させる静的破砕剤の充填条件を抽出した。評価結果等から、乾式ワイヤーソー切断工法が再処理施設等に複雑に敷設されている貫通配管を安全かつ効率的に撤去する方法として、適用できる見通しが得られた。

Dry wire-saw technology was applied for removal of penetrating pipes in annex building B of JAEA's reprocessing test facility (JRTF) and concrete blocks with penetrating pipes were successfully removed. The concrete block was cracked by a silent demolition agent and was easily separated into concrete and pipes by the secondary crushing by use of a hand-breaker. Effectiveness of the dry wire-saw technology for removal of penetrating pipes was discussed and evaluated based on various work data obtained in the present activity. The use of silent demolition agent was found to be very effective for the secondary crushing of concrete blocks and its charging condition into concrete was established so as to give effective cracks for the secondary crushing. As a result of this activity, it was confirmed that the dry wire-saw technology coupled with use of a silent demolition agent was one of hopeful candidates to remove penetrating pipes safely and effectively in reprocessing facilities.

Access

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.