Conceptual Evaluation for the Installation of Treatment Capability for Mixed Low Level Waste at the Nevada National Security Site

National Security Technologies, LLC

National Security Technologies, LLC (United States)

关键词: Low-Level Radioactive Wastes;    Radioactive Waste Facilities;    Ground Disposal;    Radioactive Waste Processing;    Hazardous Materials;   

DOI  :  10.2172/993440
RP-ID  :  DOE/NV/25946--1109
RP-ID  :  DE-AC52-06NA25946
RP-ID  :  993440

美国|英语

来源: UNT Digital Library

【 摘 要 】

National Security Technologies, LLC, initiated an evaluation of treatment technologies that they would manage and operate as part of the mixed low-level waste (MLLW) disposal facilities at the Nevada National Security Site (NNSS). The NNSS Disposal Facility has been receiving radioactive waste from the U.S. Department of Energy (DOE) complex since the 1960s, and since 2005 the NNSS Disposal Facility has been receiving radioactive and MLLW for disposal only. In accordance with the Resource Conservation and Recovery Act (RCRA), all mixed waste must meet land disposal restrictions (LDRs) prior to disposal. Compliance with LDRs is attained through treatment of the waste to mitigate the characteristics of the listed waste hazard. Presently, most generators utilize commercial capacity for waste treatment prior to shipment to the NNSS Disposal Facility. The objectives of this evaluation are to provide a conceptual study of waste treatment needs (i.e., demand), identify potential waste treatment technologies to meet demand, and analyze implementation considerations for initiating MLLW treatment capacity at the NNSS Disposal Facility.A review of DOE complex waste generation forecast data indicates that current and future Departmental demand for mixed waste treatment capacity will remain steady and strong.Analysis and screening of over 30 treatment technologies narrowed the field of treatment technologies to four:• Macroencapsulation• Stabilization/microencapsulation• Sort and segregation• Bench-scale mercury amalgamationThe analysis of treatment technologies also considered existing permits, current the NNSS Disposal Facility infrastructure such as utilities and procedures, and past experiences such as green-light and red-light lessons learned.A schedule duration estimate has been developed for permitting, design, and construction of onsite treatment capability at the NNSS Disposal Facility. Treatment capability can be ready in 20 months.