Strontium and Actinides Removal from Savannah River Site Actual Waste Samples by Freshly Precipitated Manganese Oxide

Barnes, M.J.

Savannah River Site (S.C.)

关键词: Removal;    Manganese Oxides;    Radioactive Waste Processing;    Liquid Wastes;    Actinides;   

DOI  :  10.2172/803397
RP-ID  :  WSRC-TR-2002-00048, Rev. 2
RP-ID  :  AC09-96SR18500
RP-ID  :  803397

美国|英语

来源: UNT Digital Library

【 摘 要 】

The authors investigated the performance of freshly precipitated manganese oxide and monosodium titanate (MST) for the removal of strontium (Sr) and actinides from actual high-level waste. Manganese oxide precipitation occurs upon addition of a reductant such as formate (HCO2-) or peroxide (H2O2) to a waste solution containing permanganate (MnO4-). An addition of non-radioactive strontium typically precedes the MnO4- and reductant addition, which serves primarily to isotopically dilute the strontium-90 (90Sr) present in the waste. Tests utilized a Tank 37H/44F composite waste solution. Personnel significantly increased the concentration of actinides in the waste by the addition of acidic americium/curium solution (F-Canyon Tank 17.1 solution), which contained a significant quantity of plutonium (Pu), and neptunium-237 (237Np) stock solution. Initial tests examined three manganese oxide treatment options.