The Nuclear Regulatory Commissioning said Wednesday it will conduct a technical review of an Energy Department proposal to dispose of certain vitrified low-activity radioactive waste at the Hanford Site in Washington state.
Speaking at an online public meeting, NRC Senior Risk Analyst David Esh said the agency is acting in a consulting role as the Energy Department refines a proposal to permanently dispose of much of Hanford’s processed low-activity waste at the on-site Integrated Disposal Facility.
Last month, the Energy Department issued a draft Waste Incidental to Reprocessing (WIR) Evaluation for its disposal approach for the low-activity waste. The document says the material, once it has been converted to glass form and placed into canisters, is safe enough that it does not need to be shipped to another disposal location.
Esh, who is leading the NRC technical review of the DOE plan for on-site disposal, said the regulator will look at what can happen to the waste at the Integrated Disposal Facility – such as natural disasters or the chance that someone in the distant future might inadvertently drill into the waste site – and the impact of such an event.
Roughly 90% of the 56 million gallons of radioactive waste held in 177 underground storage tanks at Hanford is estimated to be low-activity waste. Hanford is supposed to start processing that material by the end of 2023 at the Waste Treatment Plant being built by Bechtel.
The Energy Department expects 23.5 million gallons of radioactive waste, about half of the 56 million gallons generated from decades of plutonium production at Hanford, might be disposed on on-site. The agency has said in the past that the vitrification plant lacks the capacity to convert all the low-activity waste into glass.
The NRC will finish its draft detailed technical review and file it with the Energy Department by Oct. 1. The DOE will then respond to the NRC by Jan. 27, 2021. The final technical review should be filed with the Energy Department by May 21, 2021.
The Nuclear Regulatory Commission has no oversight role at Hanford, so it will be up to DOE to decide what to do with information in the technical review.
