[Global] Reactor Vessel flange cleaning

[kevin.licklider at dominionenergy.com]

Good Moring All,
I hope everyone is finished with their outage, but I have some questions.

What is your process for cleaning the reactor vessel flange prior to setting the reactor head?  Clean underwater? Employ a flange cleaning tool?
If you use a flange cleaning tool who is the manufacturer

At NAPS we wait until the head is approximately 18" from the flange for shielding and use long handled tools to clean the O-ring grooves.
One unit has experienced a slight inner O-ring leak during power operations ~0.05 gpm.

Thank You in Advance for your reply

PS
Thanks for the replies already from Seabrook, Braidwood, Sequoyah and Watts Bar on this matter.


Kevin Licklider
North Anna Power Station
ALARA Coordinator
540-894-2873

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