Update on the Engineering Design Studies Evaluated in the NRC Report 'Analysis of Engineering Design Studies for Demilitarization of Assembled Chemical Weapons at Pueblo Chemical Depot' (2002) / Chapter Skim
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Michael Parker Program Manager Assembled Chemical Weapons Assessment ATTN: AMSSB-PM-ACWA Aberdeen Proving Ground, MD 21010-5424 Board on Army Science and Technology Committee on Review and Evaluation of Alternative Technologies for Demilitanzation of Assembled Chemical Weapons: Phase 2 February I, 2002 Re: Update on the engineering design studies evaluated in the NRC report Analysis of Engineering Design Studies for Demilitarization of Assemblec! Chemical Weanons at Pueblo Chemical Depot (August 2001)
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The purpose ofthe testing was to define process parameters, demonstrate safe processing for the scale-up of the hydrolysis process, and produce hydrolysates for fixture use in the ACWA program. The testing also addressed concerns raised by the NRC regarding processing, as well as issues encountered during previous energetics hydrolysis testing at other facilities (NRC, 2001~.
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I Completed EDS test reports indicate that hydrolysis can safely destroy the energetic materials found in the assembled chemical weapons at Pueblo Chemical Depot.
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Only SCWO reactor systems that would treat HD hydrolysate at Pueblo appear to require liner change-outs, and, as discussed below, there are signs that here, too, they may prove unnecessary. These results indicate that far fewer SCWO reactor liner change-outs would be required at Pueblo than had been thought previously by the committee.
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In the committee's opinion, this level of maintenance, while high, does not place an unmanageable burden on the operations and maintenance staff. These results resolve the committee's earlier concerns pertaining to high maintenance requirements for the SCWO reactors as discussed in previous findings and recommendations (NRC, 2001~.
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The PWS test is representative of an almost fully functional assembled chemical weapons demilitarization processing line except for the biotreatment of the hydrolysate (Parsons, 200 ~ a)
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Gaseous effluent treatment issues still to be addressed include the following: · Improve CATOX temperature controls to prevent damage to the catalyst from too-high temperatures, as occurred in earlier testing. Improve solids separation upstream of the CATOX unit to prevent fouling and plugging of catalyst by fine particulates.
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These modifications are major in scale and budget/schedule constraints preempted their implementation in the test system, however the risk associated with the problem of dioxin/furan formation may warrant their implementation/testing before completing the detailed design of the full-scale pilot facility (FSPF) , which will require characterization of the treated gaseous effluent.
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2001. Analysis of Engineering Design Studies for Demilitarization of Assembled Chemical Weapons at Pueblo Chemical Depot.
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