According to the state-owned energy group Vattenfall AB, which controls Forsmark Kraftgrupp AB, a new chief executive will be chosen soon.
Managers at the plant decided to shut down the two reactors after indications on Saturday that rubber seals at the Forsmark 1 reactor showed possible damage.
Forsmark 2 was also taken off-line because the two plants are constructed similarly.
Both reactors have been plagued with problems, including brief shutdowns in December and last month.
Minister for Enterprise and Energy Maud Olofsson said on Friday that she wants a report from Vattenfalls board on what actions they will take to improve safety at Forsmark.
Olofsson also said she wants to be continuously updated on the measures taken since the government, as owner, has an overall responsibility for the energy group.
Maud Olofsson also accused managers of the troubled nuclear power plant of neglecting safety procedures, saying that had posed a serious threat to people and the country’s electricity supply.
According to Olofsson ”The attitude toward safety has not been sufficient, both when it comes to technical safety and safety traditions.”