Electrochemical Denitration and Caustic Generation (EDCGe) System: Year One Project Report

An advanced electrochemical denitration and caustic generation (EDCGe) system is being developed to process legacy waste through the direct feed high-level waste (DFHLW) flowsheet at Hanford. This system aims to destroy nitrates and organics in DFHLW and potentially DFHLAW feeds, significantly reducing off-gas concerns from both process safety and process flowsheet perspectives. Supported by a multidisciplinary team, this effort includes creating a tandem denitration electrolyzer/off-gas system as part of a broader mission to accelerate waste treatment through fundamental and applied research and development initiatives. The progress for the first year of the three-year program to develop technology for the EDCGe system is described within this document.. Authors: Rodene, Dylan D. [Savannah River National Laboratory (SRNL), Aiken, SC (United States)] (ORCID:0000000252354260); Marin Bernardez, Edelmy J. [Savannah River National Laboratory (SRNL), Aiken, SC (United States)] (ORCID:0000000194984247); Gordon, Matthew N. [Savannah River National Laboratory (SRNL), Aiken, SC (United States)] (ORCID:0000000172129047); Lavenue, Margaux [Savannah River National Laboratory (SRNL), Aiken, SC (United States)]; Ramsey, Amy A. [Savannah River National Laboratory (SRNL), Aiken, SC (United States)]. DOE Contract: 89303321CEM000080. Subjects: 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; Electrochemistry; Hanford; Nuclear Waste Pretreatment; Off-gas Abatement; Supernate Simulant