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Monday, October 20, 2014

Multiple Parties Rush to Restore Doel 4

I've reported quite a bit here (and at ANS Nuclear Cafe) on the ongoing investigation concerning perceived reactor vessel flaws at two Belgian nuclear plants.  While that's ongoing, a recent event saw apparent deliberate action to dump turbine lube oil from Doel 4's turbine generator while it was at full load, causing extensive damage.

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:

FANC investigates on automatic shutdown of Doel 4 NPP
8 August 2014 - The Doel 4 nuclear power plant was automatically shut down on Tuesday 5 August 2014, as a result of an oil leak on the steam turbine. This turbine is located in the non nuclear part of the NPP. A FANC expert team went to the site to make the necessary assessments.

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.
 
 
3:15 PM Eastern 10/20/2014
ATOMIC POWER REVIEW

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