Catalytic Effects of Silver in Iodine Reactors for Dissolved Used Nuclear Fuel

Gogolski, Jarrod M.; Taylor-Pashow, K.; Rudisill, Tracy S.; Restivo, M.; Pareizs, J. M.; Lascola, Robert; O'Rourke, Patrick; Daniel, William E.

doi:10.1080/00295450.2022.2092358

Cited by 1 publication

(2 citation statements)

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“…Thus, much of the current source for N 2 O was not present in this historical example, and the results are not directly comparable (even assuming that the gas treatment was identical, which might not be the case). Recent studies [ 25 ] examining the role that the silver nitrate-coated berl saddles may have in the catalytic destruction of these species did not show any changes in the concentrations of N 2 O and NO. The reason for the loss of N 2 O remains unexplained.…”

Section: Discussionmentioning

confidence: 99%

“…The studies on silver nitrate-coated berl saddles show that under laboratory conditions consistent with process parameters, H 2 was catalytically recombined with O 2 with high efficiency (>97% for residence times of >10 s) [ 25 ]. As noted earlier, %O 2 levels are depressed during peak NO 2 offgassing to a greater extent that would be expected due to displacement.…”

Section: Discussionmentioning

confidence: 99%

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Development of a Nuclear Fuel Dissolution Monitor Based on Raman Spectroscopy

Lascola,

O'Rourke,

Immel

2024

Sensors

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The processing of spent nuclear fuel and other nuclear materials is a critical component of nuclear material management with implications for global security. The first step of fuel processing is dissolution, with several charges of fuel sequentially added to a batch of solvent. The incomplete dissolution of a charge precludes the addition of the next charge. As the dissolution takes place in a heated, highly corrosive and radiological vessel, direct monitoring of the process is not possible. We discuss the use of Raman spectroscopy to indirectly monitor dissolution through an analysis of the gaseous emissions from the dissolver. Challenges associated with the implementation of Raman spectroscopy include the composition and physical characteristics of the offgas stream and the impact of operating conditions. Nonetheless, we observed that NO2 concentrations serve as a reliable indicator of process activity and correlate to the amount of fuel material that remains undissolved. These results demonstrate the promise of the method for monitoring nuclear material dissolution.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%