METHOD FOR MANUFACTURING CLEARANCE METAL

• Main Authors: TAKAGI MASAKAZU, MIYAKOSHI YASUHIRO, TADA MITSUHIRO, KAMIYAMA YUTAKA, IDA HIROYUKI, HIROSE MICHIYUKI, KIKUCHI TORU
• Format: Patent
• Language: English; Japanese
• Published: 16.04.2020
• Subjects: CHEMISTRY; DECONTAMINATION ARRANGEMENTS THEREFOR; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PHYSICS; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; TREATMENT OF ALLOYS OR NON-FERROUS METALS

To provide a method for manufacturing a clearance metal which can reduce radioactive metal wastes and can secure a high yield.SOLUTION: The method for manufacturing a clearance metal according to the present invention manufactures a clearance metal from a radioactive metal waste. The method includes: a radioactive metal waste input step; a slug raw material input step; a radioactive material shifting step; a dust processing step; a switching step; a stationary separation step; a clearance metal generation step; a generated metal radioactivity concentration measuring step; a clearance un-arrival metal input step; a tundish melting residual generation step; a re-melting availability determination step; a melting residual input step; and a melting residual processing step.SELECTED DRAWING: Figure 1 【課題】放射性金属廃棄物の減容化を図ると共に、歩留まりのよいクリアランス金属の製造方法を提供する。【解決手段】本発明に係るクリアランス金属の製造方法は、放射性金属廃棄物からクリアランス金属を製造する方法であって、放射性金属廃棄物投入工程と、スラグ原料投入工程と、放射性物質移行工程と、ダスト処理工程と、移し替え工程と、静置分離工程と、クリアランス金属生成工程と、生成金属放射能濃度測定工程と、クリアランス未達金属投入工程と、タンディッシュ溶融残渣生成工程と、再溶融可否判断工程と、溶融残渣投入工程と、溶融残渣処分工程を備えたものである。【選択図】 図１