永えい久きゅう保ほ管かんMeaningsNoun1. permanent storage (radioactives, data, etc.)Other readings永久とわ保ほ管かんKanji used永eternity久long time保preserve管pipeComposed of永えい久きゅうeternity; permanence; perpetuityNoun保ほ管かんcharge; custody; safekeeping; deposit; storageNoun