Vattenfall announced in July that it would be suing the German government over its decision to abandon nuclear power.
With the German reactors the company has stakes in facing a shutdown, the energy group has now asked the Radiation Safety Authority in Sweden for permission to replace one or two of its existing nuclear reactors here.
Jan Björklund, the leader of the Liberal Party, welcomes Vattenfall's application, saying that Sweden will become dependent on coal and gas from other countries if new reactors are not built in 10–15 years' time.
"I am pretty convinced that new reactors will be built," Björklund told Swedish Radio News.
But the Green Party's spokesperson for energy, Lise Nordin, pointed to neighbouring Finland's experiences when building new plants and said replacing old ones will not be cost-efficient.
"In Finland, companies have understood that costs become double or triple expectations," Nordin told TT.
She added that Vattenfall, a public company, is benefiting from the government's energy policies.
"It is only the state-owned energy company that is considering nuclear power. That means this is being politically guided."
In 2010 the centre-right coalition government lifted a ban on building new nuclear energy plants. The ban dated back to the 1980 referendum, when Swedes voted overwhelmingly to phase out nuclear power here.
Environment Minister Lena Ek told news agency TT the company will not be able to formally apply for new reactors until 2014, when the Authority's new guidelines are in place.
Vattenfall made the announcement in connection with its report for the second quarter, which posts profits of around US$ 120 million after losing nearly US$ 500 million in the same period last year.