Part of the Sellafield nuclear complex, which was forced to close after a major leak of radioactive material, has been given permission to reopen.
The leak occurred at the Thorp complex at Sellafield
The Thorp facility was shut down in April 2005, after 83,000 litres of acid containing uranium and plutonium escaped from a broken pipe.
Operator British Nuclear Group was fined £500,000 after action brought by the Health and Safety Executive (HSE).
The HSE says enough has now been done to allow the facility to reopen.
No-one was injured in the leak at the Thermal Oxide Reprocessing Plant (Thorp) and no radiation escaped from the plant.
The company pleaded guilty to three counts of breaching conditions attached to the Sellafield site licence, granted under the Nuclear Installations Act 1965.
British Nuclear Group is now considering when the plant will reopen.