Dissolution of Irradiated Murr Fuel Assemblies

Kyser, Edward A.

doi:10.2172/990337

Cited by 10 publications

(53 citation statements)

References 9 publications

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“…To calculate the peak off-gas rates for the dissolution of the SRE, HMI, and DR-3 assemblies in the LBundle, several assumptions were made as was done for the dissolution of the MURR assemblies in a prior report 34 . The off-gas rates for the FNR assemblies were not calculated in this report since it was determined in separate documents 20,38 that the hydrogen off-gas generation from the dissolution of the LBundle with five FNR assemblies would be the same as dissolving the L-Bundle with four MURR assemblies.…”

Section: 1 Off-gas Rate Calculation Assumptions and Conditionsmentioning

confidence: 99%

“…Since the HMI and DR-3 are High Aluminum-Low Uranium UNFs like the MURR assemblies, the same off-gas composition used for the MURR dissolution calculations 34 was used. This off-gas composition for the High Aluminum-Low Uranium assemblies is 7.0 vol % H 2 , 71.4 vol % NO, and 21.6 vol % N 2 O on an air, water, and nitrogen free basis where the molar ratio of NO/N 2 O is 3.3.…”

Section: 1 Off-gas Rate Calculation Assumptions and Conditionsmentioning

confidence: 99%

“…These H 2 LFL values originally came from F. Scott's 28 °C data 41 and are assumed applicable for NO/N 2 O molar ratios from 2 to 5. A list of these LFL values is shown in Table 3 In the prior MURR dissolution off-gas calculations 34 , the maximum peak off-gas rate of 34.37 scfm during dissolution was calculated based on the assumed off-gas composition discussed above with a 40 scfm air purge rate to stay below the 60% of H 2 LFL at 200 °C. This same peak off-gas rate of 34.37 scfm will be used for the HMI, SRE, and DR-3 dissolutions.…”

Section: 1 Off-gas Rate Calculation Assumptions and Conditionsmentioning

confidence: 99%

“…In the off-gas calculations for the dissolution of the MURR assemblies 34 , the reference peak off-gas generation rate was 0.676 scfm/ft 2 at 0.001 M Hg based on testing by Caracciolo. 43 This same reference peak off-gas rate was assumed for the dissolution of the SRE, HMI, and DR-3 assemblies in the LBundle.…”

Section: 1 Off-gas Rate Calculation Assumptions and Conditionsmentioning

confidence: 99%

“…34 This 50% reduction in dissolution rate directly translates into a 50% reduction of the peak off-gas generation rate. Since the HMI and DR-3 assemblies are comparable to the MURR assemblies (High Aluminum-low Uranium), a similar 50% reduction in dissolution rate was assumed for these off-gas calculations.…”

Section: 1 Off-gas Rate Calculation Assumptions and Conditionsmentioning

confidence: 99%

See 4 more Smart Citations

Flowsheet Evaluation for the Dissolving and Neutralization of Sodium Reactor Experiment Used Nuclear Fuel

Daniel¹,

Hansen²,

Shehee³

2012

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Section: 1 Off-gas Rate Calculation Assumptions and Conditionsmentioning

confidence: 99%

Section: 1 Off-gas Rate Calculation Assumptions and Conditionsmentioning

confidence: 99%

Section: 1 Off-gas Rate Calculation Assumptions and Conditionsmentioning

confidence: 99%

Section: 1 Off-gas Rate Calculation Assumptions and Conditionsmentioning

confidence: 99%

Section: 1 Off-gas Rate Calculation Assumptions and Conditionsmentioning

confidence: 99%

See 3 more Smart Citations

Flowsheet Evaluation for the Dissolving and Neutralization of Sodium Reactor Experiment Used Nuclear Fuel

Daniel¹,

Hansen²,

Shehee³

2012

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Dissolution of used nuclear fuel using recycled nitric acid

Almond

Daniel

Rudisill

2017

Separation Science and Technology

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SRNL evaluated the feasibility of using HB-Line anion exchange column waste streams from AFS-2 processing for the dissolver solution for Used Nuclear Fuel (UNF) processing. The targeted UNF for dissolution using recycled solution are fuels similar to the University of Missouri Research Reactor (MURR) fuel. The objectives of this experimental program were to validate the feasibility of using impure dissolver solutions with the MURR dissolution flowsheet to verify they would not significantly affect dissolution of the UNF in a detrimental manner.Initial dissolution experiments were unsuccessful in dissolving Al alloy sufficiently using 0.002 M Hg in solutions containing impurities in the concentration ranges expected to originate from AFS-2 processing. These impurities included F, Fe, Cr, Ni, Mn, Al, Cl, B, and Gd.Solutions with these impurities dramatically slowed or stopped the dissolution. Through this work, it was discovered that increasing the concentration of the Hg catalyst could overcome the deleterious effects of these impurities together. Experiments were subsequently performed with individual impurities to identify those that are problematic and to determine the amount of Hg required to overcome their effects. Iron was identified as the impurity that most significantly impacted the dissolution rates. The Hg catalyst concentration was increased from 0.002 M to 0.012 M to dissolve Al in the presence of all the impurities at their maximum concentrations (including Fe at 10 g/L).

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