Experimental investigation of the distribution of krypton during the removal and fixation of CO/sub 2/ from simulated HTGR fuel reprocessing off-gas by the CO/sub 2/-Ca(OH)/sub 2/ slurry reaction

Technical Report · Tue Jun 01 00:00:00 EDT 1982

DOI:https://doi.org/10.2172/5296202· OSTI ID:5296202

Holladay, D. W.

An experimental investigation was conducted to determine the behavior of krypton during the removal and fixation of CO/sub 2/ from simulated HTGR fuel reprocessing off-gas in a mechanically agitated gas-Ca(OH)/sub 2/ slurry contactor. For CO/sub 2/ removal, decontamination factors (DFs) in the range of 10/sup 2/ to 10/sup 3/ were obtained with a single contactor; DFs for CO/sub 2/ of 10/sup 3/ to 10/sup 4/ were obtained during operation of two contactors in series. For the primary CO/sub 2/ removal step in a single contactor, 0.5 to 1% of the krypton in the feed gas was retained in the slurry. Additional treatment resulted in further reduction of the slurry krypton content by a factor of 10/sup 2/. (Overall, evacuation of the product slurry during agitation was the most desirable add-on process.) Thus, the quantity of krypton in the feed that was retained in the product CaCO/sub 3/ slurry could be restricted to 0.01 to 0.001% by using a combination of primary processes and add-on treatments. Models are presented that predict the distributions of both CO/sub 2/ and krypton during gas treatment in Ca(OH)/sub 2/ slurries for both single-contactor and contactors-in-series operation.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 5296202
• Report Number(s): ORNL/TM-6539; ON: DE82016368; TRN: 82-015588
• Country of Publication: United States
• Language: English

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11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
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HTGR TYPE REACTORS
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ACTIVITY LEVELS
REPROCESSING
CHEMICAL REACTIONS
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REACTOR MATERIALS
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050800* - Nuclear Fuels- Spent Fuels Reprocessing
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Nonbreeding
Graphite Moderated