永えい久きゅう保ほ管かん

noun

permanent storage

Used for indefinite, long-term storage of materials such as radioactive waste, digital data, or important records.

• 放ほう射しゃ性せい廃はい棄き物ぶつの永えい久きゅう保ほ管かんは大おおきな課か題だいだ。