Megasized SDUs
SRS continues to meet mission needs by constructing megasized SDUs to permanently dispose of decontaminated saltstone.


The SRS, a 310 square mile site in Aiken, South Carolina, focused on the production of plutonium and tritium for use in the manufacture of nuclear weapons from its inception in the early 1950s until the end of the Cold War. In 1992, the focus at SRS turned to environmental cleanup, nuclear materials management, and R&D activities.

Today, SRS is a complex site run by EM and host to NNSA and the U.S. Forest Service. The DOE Savannah River Operations Office (DOE-SR) works in partnership with multiple contractors in technically sophisticated nuclear and non-nuclear facilities. Cleanup activities at SRS include addressing 35 million gallons of radioactive liquid waste stored in 43 underground tanks; surplus plutonium downblending with eventual disposition as transuranic waste at WIPP; disposition of highly enriched uranium and receipt/storage/processing of foreign and domestic research reactor spent nuclear fuel; facility deactivation and decommissioning; and soil and groundwater remediation.

To date, 308 of 1,126 facilities have undergone deactivation and decommissioning; 412 of 515 waste units across multiple industrial areas have been remediated; and 40 remediation systems are in operation addressing 14 groundwater contamination areas. Notably, collaboration among SRS stakeholders and state and federal regulators resulted in the in-situ decommissioning of P- and R-Area Reactors in 2011 — the first in the DOE complex. Finally, the operational footprint of SRS has been reduced by 85 percent.

SRS processes and stores nuclear materials in support of national defense and U.S. nuclear nonproliferation efforts. SRS is also responsible for oversight of the Savannah River National Laboratory (SRNL), EM’s only national laboratory. SRNL assists EM in achieving the nation’s legacy nuclear waste cleanup objectives and plays an equally important role supporting NNSA through its work in tritium R&D, operations support, stockpile stewardship, nuclear nonproliferation, and other critical national security programs.


SRS leadership is dedicated to meaningful engagement with stakeholders and the citizens of the Central Savannah River Area. DOE-SR and contractor managers meet regularly with federal and state regulators, business and community leaders, and citizen groups to provide updates on SRS operations and to solicit input regarding the missions and budget priorities. SRS enjoys a positive working relationship with stakeholders and the vision for the coming decade has their support. SRS stakeholders include EPA, South Carolina Department of Health and Environmental Control (SCDHEC), the Savannah River Site Community Reuse Organization, the SRS Citizens Advisory Board, and a host of state and local elected officials.

Calendar Year 2021 Accomplishments:

  • Processed more than 2 million gallons of waste at SWPF in its first year of operations
  • Completed construction ahead of schedule and under budget for Saltstone Disposal Unit 7, the second mega-sized SDU built at SRS to permanently dispose of decontaminated saltstone
  • Treated and disposed of more than 3 million gallons of decontaminated salt solution at the Saltstone Production Facility — a record for any fiscal year in the history of the high-level waste program at SRS
  • Increased throughput of H-Canyon with processing of 11 spent nuclear fuel dissolutions
  • Transitioned to a new standalone management and operating contract for SRNL
  • Deactivated and decommissioned five buildings in D Area and completed D Area Coal Yard cleanup project to excavate and blend soil with fine grade limestone to lower pH levels
Site of Tank 42
SRS completed modifications to convert Tank 42 into the third blend tank for the SWPF feed. Pictured is the site of Tank 42.

Planned Cleanup Scope 2022–2032

Over the coming decade, DOE expects to significantly enhance its ability to tackle the largest remaining environmental risk at SRS — radioactive tank waste — with the ramp up of new waste treatment facilities. DOE will also make continued progress in addressing nuclear materials stored at SRS, and complete disposition of the remaining transuranic waste.


The liquid waste program will achieve significant risk reduction through continued stabilization and immobilization of the high-activity fraction of the waste in a glass waste form and immobilization of the lowlevel fraction of the waste as a saltstone waste form. The SWPF began hot operations in January 2021 and expects to process up to 9 million gallons of waste per year by FY 2024 following the implementation of the Next-Generation Solvent. By 2031, it is expected that nearly all of the salt waste inventory will be processed, and F-Tank Farm will be nearly empty.

DOE will continue to perform environmental analyses in an effort toward the use of the Department’s interpretation of high level waste for waste streams at SRS. The interpretation was successfully demonstrated in 2020 when a small amount of Defense Waste Processing Facility (DWPF) recycle wastewater was treated and disposed. In 2021, the Department released a draft environmental assessment analyzing the proposed commercial disposal of certain contaminated process equipment at SRS utilizing the high level waste interpretation.

With the startup and operation of SWPF and its integration with the liquid waste system, substantial progress toward tank closure will continue with up to 22 of the 51 underground tanks being closed in the next decade. By 2031, the DWPF is forecast to have produced more than 6,800 canisters of vitrified radioactive waste (more than 85 percent of the anticipated total). The liquid waste program will continue to support receipt of waste from H-Canyon operations.

Iron Filings with a Food-Grade Starch-Like Material
Workers mixed more than a million pounds of iron filings with a food-grade, starch-like material (shown here) to create the P Area Permeable Reactor Barrier Wall, which won a 2021 DOE Sustainability Award.


The near-term nuclear materials disposition program strategic objectives are to continue disposition of legacy material stored in L- and K-Areas, as well as continued surveillance and maintenance of excess, non-operating nuclear facilities awaiting decommissioning. Over the next 10 years, the K-Area facilities will continue to downblend and disposition both EM and NNSA surplus plutonium to produce transuranic waste for eventual disposal at WIPP. Shipment of waste to WIPP is expected to begin in 2022. The K-Area facilities will continue to provide long-term storage of special nuclear material owned by both EM and NNSA.

The L-Area facilities will continue to provide wet storage of spent nuclear fuel received as part of the domestic and foreign research reactor fuel receipt programs. EM is considering implementing over the next decade an Accelerated Basin De-inventory, which would change H-Canyon operations from recovery of uranium during processing to no recovery of uranium, along with discontinuance of support for H-Canyon capabilities for which there are no designated missions. This approach could allow all the spent nuclear fuel in L-Basin to be processed through the H-Canyon chemical separations facility, thereby eliminating the need for a new dry spent nuclear fuel storage capability and generating life cycle cost savings of more than $4 billion. The Receiving Basin for Off Site Fuels, 235-F, and F/H Analytical Laboratories will complete deactivation activities, enabling transfer to the decommissioning program.


The solid waste program will continue to characterize, store, and disposition site-generated wastes in compliance with applicable regulations and requirements. All remaining SRS legacy transuranic waste (approximately 460 cubic meters) will be disposed of at WIPP.


The SRS environmental remediation program employs an approach to address remediation of waste units and facility deactivation and decommissioning per the various site areas. The program will continue to clean up contaminated soils, groundwater, streams and associated wetlands, and legacy waste units, which include ash basins and coal yards. EM is committed to reducing risk and protecting groundwater aquifers and surface waters from the spread of contamination by addressing sources of contamination and employing innovative technologies such as the in-ground reactive barrier wall in P-Area to treat solvent-contaminated groundwater.

In addition, an integral part of the cleanup mission is the deactivation and decommissioning of legacy facilities constructed in support of industrial operations, common infrastructure systems, and past nuclear materials production, such as the 235-F Plutonium Processing Facility, C/K/L Reactors, and F-Area Tank Farm. SRS will continue to operate and maintain soil and groundwater remedial systems, and conduct post-closure and post-ROD care, surveillance, and maintenance of 73 closed areas (approximately 1,000 acres).


In 2021, EM transitioned to the new standalone M&O contract for SRNL. This new contract positions the laboratory for long-term growth and continued success in support of the DOE strategic goals in the cleanup of the nuclear legacy, science and energy, and nuclear security. It also enables SRNL to focus on its strategic plans for expanding the R&D portfolio supporting DOE missions and other federal agencies, while allowing the SRS M&O to focus on its program priorities in managing and operating the SRS.

DOE is also moving forward with design and build of the Advanced Manufacturing Collaborative (AMC). Once constructed, the AMC will provide SRNL with an accessible, modern facility for R&D that brings government, industry, and academia together to develop and share advanced manufacturing technology. It will also support STEM education to train the next generation of advanced manufacturing workers to support both DOE missions and U.S. industry that will increase manufacturing competitiveness across the state, region and nation. Construction of the AMC facility is expected to be completed in 2024.

Key Regulatory Milestones 2022-2032

Cleanup work at Savannah River is governed by a Federal Facility Agreement between the DOE, SCDHEC, and the EPA. In addition, the Dispute Resolution Agreement with SCDHEC governs salt waste processing quantities for the liquid waste program.

  • Start remedial action for Lower Three Runs Stream System — 2023
  • Start coal ash remediation in A-Area — 2026
  • Start remedial action for ancillary facilities in F-Area — 2027
  • Start remedial action for C-Area groundwater — 2028
  • Start coal ash remediation in K-Area — 2028
  • Start remedial action for D-Area groundwater — 2029
  • Start coal ash remediation in L-Area — 2029
D Area Coal Yard Cleanup Project
SRS completed the D Area Coal Yard cleanup project to excavate and blend soil with fine-grade limestone to lower pH levels.

Post-2032 Cleanup Scope

The liquid waste program will start shutting down its operations after DWPF completes treatment operations for the remaining sludge and salt waste and operational closure of the tank farms is completed. Once the liquid waste program cleanup mission is completed, the surveillance and maintenance of the vitrification canisters in storage will be transferred to the solid waste program before eventual disposition at a federal repository yet to be determined.

The remaining non-operational nuclear material facilities (e.g., F-Canyon/FB-Line, H-Canyon/HBLine) will complete deactivation and be turned over for decommissioning. Operations in K-Area will continue to support the disposition of surplus plutonium with a significant downblending mission, with the facility deactivated after the special nuclear material is dispositioned.

Newly generated wastes resulting from the EM cleanup program will continue to be disposed of in accordance with the EM mission as the waste is generated. As the nuclear materials and liquid waste programs complete their missions, the Environmental Remediation and deactivation and decommissioning programs will ramp up to provide for remediation of approximately 100 legacy waste units and deactivation and decommissioning of over 800 industrial, nuclear, and radioactive facilities.


EM Strategic Vision: 2022-2032