NSI Argues for Direct Disposal as Quickest Path to Nuclear Scaling

The Nuclear Scaling Initiative (NSI) has launched the 'Scale What Works' campaign, advocating for the direct disposal of spent nuclear fuel as the most viable waste management strategy for the U.S. nuclear sector. By prioritizing direct disposal over reprocessing or recycling, the initiative aims to accelerate the deployment of new nuclear reactors while minimizing environmental and security risks. This strategic shift addresses economic and technical hurdles in the waste management industry, potentially streamlining the lifecycle of nuclear energy production to meet ambitious growth targets.

The Nuclear Scaling Initiative (NSI), a collaborative effort formed by the Clean Air Task Force, the Energy Futures Initiatives Foundation, and the Nuclear Threat Initiative, is promoting direct disposal as the most efficient pathway for managing spent nuclear fuel. Launched in 2024, the NSI’s 'Scale What Works' campaign argues that direct disposal is safer and less expensive than alternative methods like reprocessing. NSI executive director Steve Comello emphasized that current reprocessing technologies are not economically viable and introduce unnecessary security risks, suggesting that focusing on proven disposal methods will better support grid reliability and national security.

According to the NSI report 'Fuel Cycle Strategy for a Secure and Scalable Nuclear Energy Future,' reprocessing involves separating materials such as plutonium and uranium from spent fuel, while recycling uses those materials to produce new fuel. The NSI contends that countries pursuing reprocessing have seen minimal material recovery and the creation of complex new waste streams that further complicate the disposal process. Furthermore, the group warns that reprocessing is time-intensive and costly, which could divert critical resources away from the rapid deployment of nuclear technologies needed to reach the NSI’s goal of 50+ gigawatts of annual capacity by the 2030s.

The campaign has gained support from high-profile figures, including former U.S. Ambassador Laura Holgate and former Senator Heidi Heitkamp, who both serve on the NSI’s global advisory board. Holgate noted that direct disposal allows the U.S. to maintain focus on proven technologies rather than high-risk alternatives that have historically stalled progress. To support its mission, the NSI recently secured a $3.5 million commitment from the Bezos Earth Fund to develop an orderbook for new reactor builds, complementing its initial philanthropic backing from Airbnb cofounder Joe Gebbia and influencer Isabella Boemeke.