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Wikipedia definition
1. Ocean disposal of radioactive wasteFrom 1946 through 1993, thirteen countries (fourteen, if the USSR and Russia are considered separately) used ocean disposal or ocean dumping as a method to dispose of nuclear/radioactive waste. The waste materials included both liquids and solids housed in various containers, as well as reactor vessels, with and without spent or damaged nuclear fuel. Since 1993, ocean disposal has been banned by agreement through a number of international treaties.
Read “Ocean disposal of radioactive waste” on English Wikipedia
Read “海洋投入” on Japanese Wikipedia
Read “Ocean disposal of radioactive waste” on DBpedia

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