Evaluating Residence Time for SuperLig(R) 644 Columns with Simulated LAW Envelope B Solution

Nash, C.A.

Savannah River Site (S.C.)

关键词: Technetium Ions;    Flow Rate;    Liquid Wastes;    Wastes;    Rivers;   

DOI  :  10.2172/812407
RP-ID  :  WSRC-TR-2002-00163
RP-ID  :  AC09-96SR18500
RP-ID  :  812407

美国|英语

来源: UNT Digital Library

【 摘 要 】

The Hanford River Protection Project Waste Treatment Plant (RPP-WTP) will be performing cesium and technetium ion exchange using SuperLig 644 and 639, respectively. Earlier work with LAW Envelope A (AN-105) simulant indicated that cesium adsorption by SuperLig 644 and perrhenate (pertechnetate analog) adsorption by SuperLig 639 are dependent on liquid volumetric flow rate during column loading. Acceptable lead column operation for both resins was attained (50 percent breakthrough at 100 column volumes) at maximum RPP-WTP design basis superficial velocities, but these results indicate that sorption kinetics could be limiting. As a follow-up to this previous work, LAW Envelope B (AZ-102) simulant was tested to verify column operability within the design basis. The simulant mimics the composition of low-activity waste solution from Tank 241-AZ-102 supernate in the Hanford waste tanks, which has higher cesium concentration than Envelopes A and C.