Hanford Nuclear Waste Cleanup Makes Progress, But Questions Loom

The Hanford Vit Plant in Washington state, a $17 billion federal facility for treating and immobilizing radioactive waste, is now on track to begin 'glassifying' low-activity nuclear waste as soon as 2022, reports IEEE Spectrum. This is 'a year ahead of a court-mandated deadline.' From the report: Still, an air of uncertainty surrounds the project. The U.S. Department of Energy (DOE) has proposed reclassifying some of the nation's radioactive waste as less dangerous, and it's unclear how that could affect the Hanford facility's long-term prospects. Hanford houses about 212 million liters of high-level waste, the leftovers of the U.S. nuclear weapons program.

However, higher-level waste has a longer timeline. Separate pretreatment and vitrification facilities aren't slated for commissioning until 2033. All parts of the Vit Plant are legally required to begin fully operating by 2036, under a consent decree between Washington, Oregon, and the federal government. The DOE hasn't said whether, or how, its proposal to reclassify nuclear waste would affect existing plans at Hanford if adopted. The agency is not making any decisions on the classification or disposal of any particular waste stream at this time, a DOE official said by email. Though current law defines high-level radioactive waste as the sludge that results from processing highly radioactive nuclear fuel, the DOE is considering slapping a new, potentially less expensive label on it if it can meet the radioactive concentration limits for Class C low-level radioactive waste. Reclassifying nuclear waste would allow the federal government to sidestep decades of cleanup work, saving it billions of dollars. The relabeling might even enable the DOE to bypass costly vitrification and instead contain tank waste by covering it with concrete-like grout, as the agency does at other decommissioned nuclear sites. Officials and citizens in Washington and Oregon oppose this method for Hanford, 'citing the risk of long-term soil and groundwater contamination and the challenges of moving and storing voluminous grout blocks,' reports IEEE Spectrum. 'Earlier federal studies found that grout 'actually performed the worst of all the supplemental treatment options considered.' (A 2017 report to Congress, however, suggested both vitrification and grout could effectively treat Hanford's low-activity waste.)'

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