Research and development to support the advancement of small modular reactors and advanced reactors. Photo by Canadian Nuclear Laboratories / Flickr (CC BY-ND 2.0) Listen to article A group of U.S.-based scientists has sent a second open letter to Prime Minister Justin Trudeau requesting an expert review of a New Brunswick nuclear project over its plans to recover a radioactive material from spent uranium fuel. The letter cites concerns about the process being proposed to recover radioactive plutonium from fuel used in nuclear reactors. The scientists worry the plutonium, and the technology associated with it, could fall into the wrong hands and be used to produce nuclear weapons, arguing statements from the project's backers saying the opposite are misleading.