Review Criteria for Successful Treatment of Hydrolysate at the Blue Grass Chemical Agent Destruction Pilot Plant (2015) / Chapter Skim
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7 Underperformance and Failure Risks, Systemization, and Contingency Options
7 Underperformance and Failure Risks, Systemization, and Contingency Options
Pages 50-66
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From page 50... ...
discusses the possible risks of underperformance or failure of the SCWO and/or the WRS. The BGCAPP project staff is UNDERPERFORMANCE AND FAILURE RISKS, in the process of identifying sources of potential SCWO and SYSTEMIZATION, AND CONTINGENCY OPTIONS FOR WRS underperformance or failure and contingency options THE SUPERCRITICAL WATER OXIDATION SYSTEM should either system underperform.1 They plan to evaluate these risks in preoperational testing activities that will take As discussed in Chapter 2, SCWO is a suitable technolplace during systemization (see Chapter 6)
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From page 51... ...
and aluminum filtration Energetics Hydrolysate system (AFS) , respectively -- to remove most of the alumi In addition to chemical agent, energetic materials from the num before it is transferred to the SCWO blend tanks.
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From page 52... ...
The agent hydrolysate will then campaign to ensure the target additive concentrations are be blended with energetics hydrolysate (after the removal of reached prior to feeding the mixtures to the SCWO reactors. aluminum in the APS and AFS)
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From page 53... ...
also recommended manifolding the highresult of FOAK testing.2 pressure air compressors so that all of the SCWO reactors will have a common air supply. Corrosion Compressor Condensate Oil-Water Separator Operation Titanium liner and thermowell corrosion has been identified as an important limiting characteristic issue in the SCWO The oil–water separator (OWS)
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From page 54... ...
which samples SCWO liquid effluent to determine effec- The technical factors that may affect SCWO performance, tiveness of organics destruction, may become clogged by as described above, will be addressed during preoperational particulate material, thereby skewing the analysis results testing activities, which will be carried out during the optidue to loss of instrument sensitivity. There are also concerns mization subphase of systemization -- that is, the 6 months about the analyzer functioning effectively in this high salt immediately preceding the start of BGCAPP operations.
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From page 55... ...
offsite may need to be considered at some point. Recommendation 7-3. The SCWO Working Group plan, SCWO Contingency Options as described in the December 17, 2014, Systemization Planning Report, and recommendations for correcting potential Mitigation strategies for technical factors that may congaps in the October 27, 2014, SCWO Working Group report tribute to underperformance of the SCWO system were should be aggressively implemented.
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From page 56... ...
Within the WRS, the RO unit is designed to provide a Finding 7-8. Due to the potential for a number of technical 24-hour supply of recycled water for use as quench water factors to inhibit SCWO system performance, a rigorous and in the SCWO reactors. In order for the RO unit to function efficient monitoring and maintenance program is critical to properly, its feed must be relatively free of particulate matter successful SCWO operations.
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From page 57... ...
Hydrolysate formulation 1 to 3 If the hydrolysate composition varies significantly from Determine chemical composition of actual and additives batch to batch, it will be more difficult to determine the hydrolysates during operations to improve formulation correct feed additives to prevent reactor plugging due strategy; storage tanks should equalize hydrolysate to salt deposition and excessive corrosion. batches to minimize variability.
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From page 58... ...
support divisions. a Many of these contingency options are discussed in the Bechtel Parsons Blue Grass Report, Recommendations for Correcting Potential Gaps in SCWO Knowledge, Experience, and Performance (BPBGT, 2014)
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From page 59... ...
To the committee's knowledge, the current which could increase coagulant requirements but might not design and systemization plan does not address many of the produce filterable solids. Further, it is uncertain how TiO2 concerns raised in the 2012 NRC letter report The Blue Grass solids emanating from corrosion of the SCWO liner will Chemical Agent Destruction Pilot Plant's Water Recovery respond to coagulation.
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From page 60... ...
The quench water is introduced circumferentially into the bottom of the SCWO WRS Contingency Options reactor and is needed to keep salts in solution downstream The operation of the SCWO process for destruction of the SCWO reactor. The RO membranes should be able to of the agent hydrolysates is tightly linked to the producprovide low TDS permeate, as they are rated for a seawater tion of quench water from the WRS units.
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From page 61... ...
, Preoperational testing of coagulants should evaluate concentrations could which will increase requirements for coagulant and efficacy; pH can be altered to minimize metal interfere with the efficacy may not produce filterable solids phosphate precipitation; coagulant jar testing should of coagulants address this concern. Inability of WRS to meet 2 or 3 • ith the proper pretreatment facilities in place, W Draw upon supplemental local Blue Grass Army Depot quantity and quality of RO system should be able to produce the water plant water to provide quench water for SCWO system; water needed for SCWO needed for quenching in SCWO operations arrange for addition of the necessary infrastructure to quenching purposes • f pretreatment and RO production cannot keep I provide local water of acceptable quality for SCWO pace with SCWO quenching needs, an alternative quenching; and acquire the appropriate permits to use source of water will be needed local water for this purpose (see Chapter 4)
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From page 62... ...
S Option 2 • alt both SCWO and WRS operations and send hydrolysate offsite. H Functions Fails to treat both SCWO effluent and Option 1 cooling tower steam/blowdown water • ontinue to process hydrolysate with SCWO, but ship SCWO effluent and blowdown offsite for C disposal, and • se demineralized Blue Grass Army Depot water for SCWO quench water.
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From page 63... ...
In the current operating plan, the energetics hydrolysate is Paper treated to remove aluminum and then blended with nerve agent hydrolysate and spent decontamination solution prior If a decision were made to ship hydrolysate or SCWO to treatment with SCWO. If offsite shipment of hydrolysates effluent offsite, a significant amount of paperwork would be is pursued, BGCAPP has indicated that the three hydrolysate required for permit modifications, changes to operating prowastes would be shipped separately rather than blended and cedures, and execution of TSDF and shipping contracts that shipped as a mixture.
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From page 64... ...
scenarios in which offsite shipment could be used temporar ily while modifications to SCWO and/or the WRS are made, Finding 7-16. A decision to ship hydrolysate offsite could or used in parallel while the SCWO system and WRS operhave serious impacts on stakeholders, BGCAPP operations, ate at reduced availability. Implementing offsite transport of regulatory compliance, and obligatory requirements under hydrolysate under any circumstance (temporary, parallel, or the Chemical Weapons Convention.
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2013. Assessment of Supercritical Water Oxidation System Testing for improve performance will be undertaken, there is still a the Blue Grass Chemical Agent Destruction Pilot Plant.
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