AN ACCELERATED RATE CALORIMETRY STUDY OF CAUSTIC-SIDE SOLVENT EXTRACTION SOLVENT WITHOUT EXTRACTANT

Fondeur, F ; Samuel Fink, S

Savannah River Site (S.C.)

关键词: Evaporators;    Calorimetry;    Chemical Reactions;    Testing;    Radioactive Waste Processing;   

DOI  :  10.2172/910463
RP-ID  :  WSRC-TR-2006-00009
RP-ID  :  DE-AC09-96SR18500
RP-ID  :  910463

美国|英语

来源: UNT Digital Library

【 摘 要 】

This study found that 4 - 48 part per thousand (ppth) of Caustic Side Solvent Extraction (CSSX) solvent without extractant in caustic salt solution at evaporator-relevant temperatures result in no process-significant energetic events. However, the data suggest a chemical reaction (possible decomposition) in the CSSX solvent near 140 C. This concentration of entrained solvent is believed to markedly exceed the amount of solvent that will pass from the Modular Caustic Side Solvent Unit (MCU) through the downstream Defense Waste Processing Facility and enter the evaporator through routine tank farm operations. The rate of pressure rise at 140 C differs appreciably - i.e., is reduced - for salt solution containing the organic from that of the same solution without solvent. This behavior is due to a reaction between the CSSX components and the salt solution simulant.