Sludge batch 9 simulant runs using the nitric-glycolic acid flowsheet

Abstract

The thirteen runs were completed between February 2 and March 18, 2016. The following people and groups listed below were instrumental in completing this testing: Thanks to the technicians responsible for the testing,

White Paper to Justify the Use of Strip Effluent in the Defense Waste Processing Facility During Slurry Mix Evaporator Processing

“…Increasing the pH above 7 leads to rheologically thicker slurries and the release of ammonia to the offgas. 5,12 DWPF would like the flexibility to add Strip Effluent during either the SRAT or SME cycle. This would give DWPF the capacity to handle more Strip Effluent in a batch or wait and add the SEFT to the SME if that flexibility is helpful to processing the batch.…”

Permanganate Oxidation of Defense Waste Processing Facility (DWPF) Recycle Collection Tank (RCT) Simulants – Protocol Runs for Nominal and Chemical Process Cell (CPC) Foamover Conditions

“…The SRAT product used was from a well-characterized mixture of product material from simulant tests SB9-NG 52, 55, and 57 (from 2016; NG is Nitric-Glycolic), which had Koopman Minimum Acid (KMA) acid stoichiometries of 100-115%. 17 These SRAT products contained unmeasured amounts of Antifoam 747 or its degradation products. In these tests, the residual amount of antifoam added was minimal, since the antifoam likely completely degraded during the CPC testing that produced them.…”

“…The soluble concentrations and fractions of Mn, Fe, and Ni in the SB9-NG 52, 55, 57 SRAT products are also listed in Table 6. 17 SRNL-STI-2019-00292 Revision 0 The Reagent simulant was also adjusted for typical acidity (pH) and total nitrate in the SMECT. The Reagent simulant runs were done with condensate (alone) at about pH 1.3, which is similar to typical values for the SMECT and OGCT ( Table 7).…”

Evaluation of the Current State of Knowledge for Thermolysis of Organics within SRS Waste Forming Volatile Organic Compounds (VOCs)

“…Antifoam 747 is used in the DWPF and many reports discuss the antifoam degradation products (ADPs) from hydrolysis degradation in radiolytic and thermolysis processes encountered in the DWPF chemical process cells. 68,69,70,71,72,73,74,75 The Flammable Gas Generation Mechanisms review 3 cited these references in sections 3, 4 and 9 with the main emphasis relating to hexamethyldisiloxane (HMDSO), trimethylsilanol (TMS), and propanal. Each of these is a National Fire Protection Association (NFPA) Class 2 flammable liquid defined as combustible liquids that have a flash point at or above 100 °F and below 140 °F.…”