SRS Sludge Batch Qualification and Processing; Historical Perspective and Lessons Learned

Cercy, M.; Peeler, David K.; Stone, M.

doi:10.2172/1095108

Cited by 3 publications

(4 citation statements)

References 7 publications

(12 reference statements)

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“…The acceptability of each future sludge batch composition and corresponding HLW glass waste form having a fissile mass loading at or below 2500 g/m 3 will be demonstrated with the approved SRS sludge batch qualification process prior to actual processing as described in Phase 2 of the DOE action memorandum. 5,20 2. The current baseline for the ABD Program beyond Sludge Batch 10 (SB10) will use gadolinium (Gd) as the neutron poison in the SRS flowsheet.…”

Section: Assumptionsmentioning

confidence: 99%

Demonstration of Defense Waste Processing Facility (DWPF) Higher Fissile Content Glass

Crawford

Hsieh

Johnson

et al. 2021

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The Accelerated Basin De-inventory (ABD) Program has been proposed as an alternative for future spent nuclear fuel (SNF) and nuclear material processing at the Savannah River Site (SRS). This approach would change the baseline H-Canyon (HCAN), Concentrate, Storage, and Transfer Facility (CSTF), and Defense Waste Processing Facility (DWPF) operations. The ABD Program would require that all domestic and foreign research reactor SNF currently at SRS be dissolved, stored, and then transferred to CSTF without the recovery of uranium. Preliminary assessments in the ABD Program plan have shown that ~5000 extra SRS high-level waste (HLW) canisters would be produced if the fissile mass loading remains at the current 897 g/m 3 limit; however, increasing the limit to 2500 g/m 3 would result in ~520 extra canisters. Thus, the ABD Program plan requires an increase of the DWPF fissile mass loading limit to 2500 g/m 3 to minimize canister production.The Department of Energy (DOE) Office of Environmental Management (EM) authorized a phased approach to increase the fissile mass loading of vitrified HLW at DWPF to 2500 g/m 3 . Phase 1 begins with testing actual radioactive waste samples to determine if the DWPF glass will meet relevant requirements. Additionally, Savannah River Remediation (SRR) has performed a Nuclear Criticality Safety Evaluation (NCSE) for the increased fissile mass loading limit. The Savannah River Nuclear Solutions (SRNS) Materials Disposition Engineering group requested that the Savannah River National Laboratory (SRNL) demonstrate that increasing the fissile mass loading in vitrified HLW to 2500 g/m 3 will have no adverse effects on glass quality specifications. The objective of this task was to fabricate and characterize two radioactive glass samples prepared with actual radioactive SRS HLW samples. One glass was prepared with a fissile mass loading below the current 897 g/m 3 limit, and a second glass was prepared with a fissile mass loading bounding the 2500 g/m 3 concentration. Both glasses were evaluated for product consistency to confirm the Waste Acceptance Product Specifications (WAPS) acceptance criterion (section 1.3) can be met with the increased fissile mass loading. Glass product consistency was determined using the Product Consistency Test (PCT) per ASTM C1285-14. Complementary X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to compare phase homogeneity among both glass samples.Most of the fissile mass from the ABD Program will be attributed to U-235. DWPF has produced homogeneous HLW glasses with total U3O8 concentrations of 1.1-3.5 weight percent (wt.%) that meet the WAPS acceptance criterion for product consistency; however, these glasses have different fissile uranium isotope distributions than those expected for HLW glasses containing ABD material. Therefore, an additional goal of this study was to confirm that DWPF HLW glass durability remains predictable with the DWPF Product Composition Control System (PCCS) durability models when the percentage of U-235 is inc...

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Section: Assumptionsmentioning

confidence: 99%

Demonstration of Defense Waste Processing Facility (DWPF) Higher Fissile Content Glass

Crawford

Hsieh

Johnson

et al. 2021

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“…12 These gaps between laboratory studies and actual facility operations can lead to equipment fouling concerns and flow restrictions as observed in the second and fifth major sludge campaigns, or "batches", in DWPF. 12,13 A comprehensive review of these operational issues and near plugging experiences are beyond the scope of this report; 14 these examples are provided as illustrative of the fact that even with extensive laboratory studies and qualification program, facility experience can prove problematic.…”

Section: Review Of Literature and Interviews With Knowledgeable Persomentioning

confidence: 99%

“…Rather, the recipes broadly represent the major chemical elements present from the different groupings of plugging events and provide semi-realistic simulants for testing. Although the FIU recipes do not provide process chemistry equivalence, these materials do exhibit non-Newtonian rheological behavior and chemical interactions that lead to particle agglomeration (and even chemical bonding or adhesion to pipe walls -as observed in prior DWPF operations 12,13,14 ) Reportedly, when the total sodium concentration exceeds ~8 M and the phosphate concentration exceeds 0.2 M, gel formation occurs. (Crystallization of solids begins at ~0.05 M phosphate.)…”

Section: Simulant Optionsmentioning

confidence: 99%

Plug Removal Inspection and Measurement Equipment (Prime) Performance Criteria for Simulated Pipeline Plugs for WTP Process Piping: A Focused Survey of Literature and Knowledgeable Personnel

Fink¹

2014

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“…An overview of the program and the lessons learned with implementation of the program (as well as from radioactive operation) was recently compiled by SRNL in a technical report for the DOE-ORP strategic efforts 20 . Pertinent information on the SRS Macro-Batch and qualification strategy as it relates to the Hanford WTP campaign strategy will be discussed in this section.…”

Section: Overview Of Dwpf Macro-batch Strategymentioning

confidence: 99%

Development Of A Macro-Batch Qualification Strategy For The Hanford Tank Waste Treatment And Immobilization Plant

Herman¹

2013

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SRS Sludge Batch Qualification and Processing; Historical Perspective and Lessons Learned

Cited by 3 publications

References 7 publications

Demonstration of Defense Waste Processing Facility (DWPF) Higher Fissile Content Glass

Demonstration of Defense Waste Processing Facility (DWPF) Higher Fissile Content Glass

Plug Removal Inspection and Measurement Equipment (Prime) Performance Criteria for Simulated Pipeline Plugs for WTP Process Piping: A Focused Survey of Literature and Knowledgeable Personnel

Development Of A Macro-Batch Qualification Strategy For The Hanford Tank Waste Treatment And Immobilization Plant

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