[Global] [EXTERNAL] OE on SFP gate repair

[Russell, Ronald B]

Catawba & Duke Fleet procedure requires a 10 foot minimum distance from fuel.  Catawba used to install the Weir Dam/gate for fuel transfer equipment PMs and repair but in the last 7-10 years we have gone to utilizing divers solely.  Contamination control, dose, and heat stress were the main drivers.  For this work we install a physical barrier to prevent divers from getting to the fuel.  We can perform these PMs for a fraction of the dose now with really no contamination control issues.
Let me know if you'd like additional information.

Ronald Russell


From: Global <global-bounces at list.rpalara.org> On Behalf Of Piche, Alex
Sent: Wednesday, January 6, 2021 1:24 PM
To: global at list.rpalara.org
Subject: [EXTERNAL] [Global] OE on SFP gate repair

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Hello Everyone,

I am reaching out to see if anyone has any OE regarding the use of coffer dams and/or divers to perform work in the SFP. At Seabrook, we are debating whether to use divers or a coffer dam for repairs on our SFP gate. One of the questions being asked is what is the minimum allowable distance to the fuel that needs to be maintained, as reactor engineering is looking to move fuel to ensure proper distances can be maintained. If anyone happens to have any experience or material, please let me know. It is greatly appreciated.

Happy New Year and all the best.

Alex Piche
RP-ALARA Analyst
Seabrook Power Station
Alex.piche at nexteeraenergy.com<mailto:Alex.piche at nexteeraenergy.com>
603-7737359
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