Radionuclide Retention Mechanisms in Secondary Waste-Form Testing: Phase II

Um, Wooyong ; Valenta, Michelle M. ; Chung, Chul-Woo ; Yang, Jungseok ; Engelhard, Mark H. ; Serne, R. Jeffrey ; Parker, Kent E. ; Wang, Guohui ; Cantrell, Kirk J. ; Westsik, Joseph H.

关键词: AR FACILITIES;    CAPACITY;    CONSTRUCTION;    DECISION MAKING;    FLUIDIZED BEDS;    LIQUID WASTES;    PERFORMANCE TESTING;    PHOSPHATES;    RADIOISOTOPES;    RESOURCE CONSERVATION;    RETENTION;    RIVERS;    SOLIDIFICATION;    STABILIZATION;    STEAM;    TANKS;    TESTING;    WASTE FORMS;    WASTE PROCESSING;    WASTES Radionuclide Retention: Waste-Form Testing;   

DOI  :  10.2172/1027193
RP-ID  :  PNNL-20753
PID  :  OSTI ID: 1027193
Others  :  Other: 830403000
Others  :  TRN: US1105695

学科分类：核能源与工程

美国|英语

来源: SciTech Connect

【 摘 要 】

This report describes the results from laboratory tests performed at Pacific Northwest National Laboratory (PNNL) for Washington River Protection Solutions (WRPS) to evaluate candidate stabilization technologies that have the potential to successfully treat liquid secondary waste stream effluents produced by the Hanford Tank Waste Treatment and Immobilization Plant (WTP). WRPS is considering the design and construction of a Solidification Treatment Unit (STU) for the Effluent Treatment Facility (ETF) at Hanford. The ETF, a multi-waste, treatment-and-storage unit that has been permitted under the Resource Conservation and Recovery Act (RCRA), can accept dangerous, low-level, and mixed wastewaters for treatment. The STU needs to be operational by 2018 to receive secondary liquid waste generated during operation of the WTP. The STU will provide the additional capacity needed for ETF to process the increased volume of secondary waste expected to be produced by WTP. This report on radionuclide retention mechanisms describes the testing and characterization results that improve understanding of radionuclide retention mechanisms, especially for pertechnetate, {sup 99}TcO{sub 4}{sup -} in four different waste forms: Cast Stone, DuraLith alkali aluminosilicate geopolymer, encapsulated fluidized bed steam reforming (FBSR) product, and Ceramicrete phosphate bonded ceramic. These data and results will be used to fill existing data gaps on the candidate technologies to support a decision-making process that will identify a subset of the candidate waste forms that are most promising and should undergo further performance testing.