Summary of FY 2010 Iodine Capture Studies at the INL

Haefner, Daryl R. ; Watson, Tony L. ; Jones, Michael G.

Idaho National Laboratory

关键词: Capacity;    Mordenite;    Fuel Reprocessing Gas Emission;    Recombination;    Waste Forms Fuel Reprocessing Gas Emission;   

DOI  :  10.2172/1009156
RP-ID  :  INL/EXT-10-19657
RP-ID  :  DE-AC07-05ID14517
RP-ID  :  1009156

美国|英语

来源: UNT Digital Library

【 摘 要 】

Three breakthrough runs using silver mordenite sorbents were conducted and a dynamic sorption capacity estimated based on MeI analysis from a 2" bed. However, it is now believed the data for the first 2 runs is incomplete because the contributions from elemental iodine were not included. Although the only source of iodine was MeI, elemental iodine was generated within the sorbent bed, presumably from a recombination reaction likely catalyzed by silver mordenite. On-line effluent analysis with a GC was only capable of analyzing MeI, not I2. Scrub samples drawn during Run #3, which are specific for I2, show significant levels of I2 being emitted from a partially spent Ag-mordenite bed. By combining MeI and I2 analyses, a well defined total iodine breakthrough curve can be generated for Run #3. At the conclusion of Run #3 (IONEX Ag-900 was the sorbent) the effluent level from Bed 2 was approaching 70% of the feed concentration. The leading bed (Bed 1) had an estimated average loading of 66 mg I/g sorbent, Bed 2's was 52 mg I/g. The corresponding silver utilizations (assuming formation of AgI) were about 59% and 46%, respectively. The spent sorbents are being sent to Sandia National Laboratories for confirmatory analysis of iodine and silver utilization as well as source material for waste form development.