Solvent Extraction Batch Distribution Coefficients with Savannah River Site Dissolved Salt Cake

Walker, D.D.

Savannah River Site (S.C.)

关键词: Radioactive Waste Processing;    Chemical Composition;    Sorption;    Storage Facilities;    Material Balance;   

DOI  :  10.2172/799445
RP-ID  :  WSRC-TR-2001-00533, Rev. 1
RP-ID  :  AC09-96SR18500
RP-ID  :  799445

美国|英语

来源: UNT Digital Library

【 摘 要 】

Researchers characterized high-level waste derived from dissolved salt cake from the Savannah River Site (SRS) tank farm and measured the cesium distribution coefficients (DCs) for extraction, scrub, and stripping steps of the caustic-side solvent extraction (CSSX) flowsheet. The measurements used two SRS high-level waste samples derived entirely or in part from salt cake. The chemical compositions of both samples are reported. Dissolved salt cake waste contained less Cs-137 and more dianions than is typical of supernate samples. Extraction, scrub, and strip DCs values for both samples exceeded process requirements and agreed well with model predictions. The results indicate no significant problems processing dissolved salt cake compared to supernate. During the course of testing, researchers observed sorption of cesium on glass sample vials containing strip solutions. The problem was detected in the material balance calculated for each organic/aqueous contact. Methods and recommendations for avoiding this problem are discussed.