POTENTIAL IMPACT OF TANK F FLUSH SOLUTIONON H-CANYON EVAPORATOR OPERATION

Kyser, E. ; Fondeur, F. ; Fink, S.

Savannah River Site (S.C.)

关键词: Evaporators;    Esters;    Resins;    Liners;    Tbp;   

DOI  :  10.2172/992624
RP-ID  :  SRNL-STI-2010-00550
RP-ID  :  DE-AC09-08SR22470
RP-ID  :  992624

美国|英语

来源: UNT Digital Library

【 摘 要 】

Previous chemical analysis of a sample from the liquid heel found in Tank F of the High Activity Drain (HAD) system in F/H laboratory revealed the presence of n-paraffin, tributyl phosphate (TBP), Modifier from the Modular Caustic-Side Solvent Extraction Unit (MCU) process and a vinyl ester resin that is very similar to the protective lining on Tank F. Subsequent analyses detected the presence of a small amount of diisopropylnaphthalene (DIN) (major component of Ultima Gold{trademark} AB liquid scintillation cocktail). Indications are that both vinyl ester resin and DIN are present in small amounts in the flush solution. The flush solution currently in the LR-56S trailer likely has an emulsion which is believed to contain a mixture of the reported organic species dominated by TBP. An acid treatment similar to that proposed to clear the HAD tank heel in F/H laboratory was found to allow separation of an organic phase from the cloudy sample tested by SRNL. Mixing of that clear sample did re-introduce some cloudiness that did not immediately clear but that cloudiness is attributed to the DIN in the matrix. An organic phase does quickly separate from the cloudy matrix allowing separation by a box decanter in H-Canyon prior to transfer to the evaporator feed tank. This separation should proceed normally as long as the emulsion is broken-up by acidification.