Mats Ladeborn, head of nuclear power development at Vattenfall, says the Green Party shouldn't talk about closing reactors unless there is a political decision to back it up.
"Phasing out nuclear power plants is more a matter of safety than a matter of political will," Ladeborn tells Swedish Radio.
Despite the Green Party's ambitions to close reactors the government is currently not working on a political proposal to shut any of them down.
Instead, Green Party spokesperson Åsa Romson says the power plants have to bear more of their social costs, and this eventually will mean that the power plants will have to close.
But Mats Ladeborn, at Vattenfall, does not share this view and says that the reactors already bear their social costs.
"The way we see it, the nuclear reactors will run for as long as they were intended to when they were built. We have no plans on closing any of them down anytime soon," he says.
A miscalculation, according to Romson who responds by saying that "no nuclear power plant in the world could possibly bear its social costs".