An Assessment of the Stability and the Potential for In-Situ Synthesis of Regulated Organic Compounds in High Level Radioactive Waste Stored at Hanford, Richland, Washington

Hanford Supplemental Low Activity Waste Simulant Evaporation Testing for Removal of Organics

“…Past work on the degradation of the heaviest regulated organics indicated likely chemical instability of 181 organic chemicals out of 269 regulated organic chemicals considered [18]. In addition, past laboratory scale evaporation work examined organic vaporization.…”

Rationale for Selection of Pesticides, Herbicides, and Related Compounds from the Hanford SST/DST Waste Considered for Analysis in Support of the Regulatory DQO (Privatization)

“…The toxicity and carcinogenicity ranking criteria is described by Wiemers et al ( 1998c), Appendix C. Thirteen compounds were found to have toxicity and carcinogenici~rankings below the analyte selection cutoff (Table 9) and did continue through the analyte selection logic.…”

“…Compounds previously identified in tank waste were not removed in Industry use evaluation. Regulated compounds may be generated through degradation of solvents and/or complexants existing in the tank waste (Wiemers et al 1998c). The stability evaluation was based on reaction chemistry of fictional groups of the analytes in question and chemical reaction rates.…”

“…Characterization data are needed for the tank waste to ensure compliant treatment, storage, and disposal of the waste, including requirements for meeting land disposal restrictions, delisting, and risk assessment. The DOE and Ecology through the Regulatory Data Quality Objectives (DQO) process have defined and documented (Wiemers et al 1998c) characterization needs for the Hanford Site single-shell tank (SST) and double-shell tank (DST) waste.…”

“…The analyte selection process was completed through a series of technically defensible logic steps that are described by Wiemers et al (1998c). An overview of the logic steps is provided in Appendix A.…”