At this time, two well known turbine generator manufacturers are working to restore the machine - Alstom is performing work on the high pressure turbine, while Siemens is working on the low pressure turbines. It's hoped that the plant can be back on line before the new year.
Here's the statement at the time of the incident from FANC, the Belgian nuclear regulator:
Its conclusion is that this oil leak probably resulted from a voluntary manual intervention. Further investigation should reveal the precise circumstances behind this event. Meanwhile, the FANC has already taken additional action to ensure the safety and security of the nuclear installations.
After the automatic reactor shutdown, it appeared that one of the three auxiliary feedwater pumps was unavailable due to a technical problem. However, the reactor was shut down in safe condition with no other problem. After investigation, this anomaly was rated as level 1 on the INES scale.
This incident had no impact neither on the safety of the workers and population, nor on the environment.