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Title: Noble gas management with radiation-tolerant MOF for molten salt reactors

Journal Article · · Cell Reports Physical Science
 [1];  [2];  [1]; ORCiD logo [1];  [1];  [3]; ORCiD logo [1]
  1. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
  2. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Washington State University, Pullman, WA (United States)
  3. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Flibe Energy Inc., Huntsville, AL (United States)

One of the advantages of molten salt reactors (MSRs) is their ability to dynamically release volatile fission products such as Kr and Xe from the fuel. In order to manage this consistent radioactive off-gas, unselective delay beds of activated carbon allow the decay of short-lived isotopes. An improved sorbent material would demonstrate both higher delay efficiency and selectivity for Xe over Kr for the added harvesting of valuable noble gases. Here, we integrate a Xe-selective metal-organic framework, SBMOF-1, into engineered beads for the management of off-gases released from MSRs. Pressure-compacted SBMOF-1 pellets outperform the industrial standard at all conditions; at 0°C, sorbent mass and volume are reduced by up to 45% and 52% compared to activated carbon, and the SBMOF-1 pellets demonstrate roughly 50% more substantial Xe/Kr separation than activated carbon at all temperatures. These results motivate the continued development of efficient sorbent technology for MSR off-gas management.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
2301806
Alternate ID(s):
OSTI ID: 2311813
Report Number(s):
PNNL-SA-191719; TRN: US2409186
Journal Information:
Cell Reports Physical Science, Vol. 5, Issue 2; ISSN 2666-3864
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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