Vlahos was described by the Australian Financial Review as ‘staunchly pro-nuclear’ and advocated for nuclear power in Australia during the lead-up to the Royal Commission into South Australia’s future role in the nuclear fuel cycle. In her 2015 submission in response to the Terms of Reference for the Royal Commission she stated that she had been an advocate for a “modern and safe” nuclear industry for South Australia “for years”. She also encouraged an investigation of the possibility of developing Thorium-fueled nuclear power.
In February 2014, Malinauskas expressed his openly pro-nuclear position to the media. At the time, the Labor party remained opposed to the establishment of a new nuclear waste repository or nuclear power plant in South Australia. He told The Advertiser:
“I believe climate change is a real challenge we need to face up to, and nuclear energy can be a safe source of base load power, with zero carbon emissions… We should have a mature debate based on science and economics to determine if a nuclear industry is viable in SA.