METHOD FOR REPROCESSING OF EQUIPMENT, CONTAMINATED WITH RADIOACTIVE IMPURITIES AND METHOD FOR PRODUCTION OF STEEL AND ALLOY USING DEBRIS OF METAL RADWASTES Russian patent published in 2005 - IPC

FIELD: reprocessing of worked-out equipment, contaminated with radioactive impurities.

SUBSTANCE: claimed method includes deactivation of contaminated equipment in assembly, disassembling, fragmentation, separation of surface-contaminated fragments, deactivation thereof, classification of metal kinds and groups, and acceptance of mechanical and physical alterations. Fragments satisfied to acceptance results are deactivated without changing form and metal structure thereof and separated into fragments for direct application and for technological update. Fragments not satisfied to acceptance results are used as debris of metal radwastes in metallurgy to produce steel and alloys. Method for production of steel and alloys includes batch preparing, additive introducing during melting process and casting of finished metal. Necessary debris amount to produce desired chemical element content in specific grade of steel or alloy is predetermined followed by calculation of dilution coefficient and upper limit value of debris specific activity. Then debris with specific activity of not more than calculated upper limit value is fed in founding as the base metal and/or addition alloy.

EFFECT: simplified and economy reprocessing method; increased metal amount recycled into national economy, and reduced solid radwaste amount.

3 cl, 2 ex