Not applicable to Waterford. South Texas had some thimble issues that may be applicable. BWRs have this problem, think in their box. I have some contacts if you need it.
Clint Alday 504-739-6331 Waterford 3
-----Original Message----- From: pwrrm-bounces@retaqs.com [mailto:pwrrm-bounces@retaqs.com] On Behalf Of Michael_Fanguy@dom.com Sent: Tuesday, April 25, 2006 1:00 PM To: respvr@keffective.com; pwrrm@keffective.com Subject: [Pwrrm] URGENT Incore Question Importance: High
Surry is looking for some urgent incore help. Please respond to Natalie and/or me.
Michael J. Fanguy Nuclear Analysis & Fuel Lead Reactor Engineer Surry Power Station Email: Michael_Fanguy@Dom.com Phone: 757-365-2155 Pager #: 3453 ----- Forwarded by Michael Fanguy/NUC/VANCPOWER on 04/25/2006 01:57 PM -----
Natalie A
Yonker/NUC/VANCPO
WER To Michael
04/25/2006 01:57 Fanguy/NUC/VANCPOWER@VANCPOWER
PM cc
Subject URGENT Incore Question!
These questions are for anyone with a Moveable Incore Detector System.
Surry is currently in a Refueling Outage and is looking for anyone who has any experience or history with finding RCS water in their 10-path boxes. During one of the last monthly flux maps before our outage, we briefly received the leak detection alarm while scanning all 5 detectors into the core. During troubleshooting this alarm was received again while inserting just the 'D' detector into the same thimble as before. On subsequent maps 'D' detector has been getting stuck while scanning (and only a couple cases while inserting). Manually the detector can be withdrawn and re-scanned, but it would continue to get stuck in various, and eventually all of its 10-Path thimbles. 'C' detector also became stuck while in Emergency in a couple of 'D' thimbles, as well as a couple of its own 10-Path thimbles. We have discovered a small amount of water near the drain hole of the 'D' 10-path box, but cannot determine which thimble it originated from based on visual inspection. 'D' detector has NOT had any trouble in Calibrate.
Does anyone have any experience or contacts that may be able to advise us of possibilities associated with this issue? I believe that we have a minor leak from a thimble on the 'D' drive, most likely the one that the leak alarms came in on. Even if we identify the source of the leak, will we be able to insert our 'D' and 'C' detectors to the top of the core in the other thimbles that it got stuck in after the outage. Surry has no experience with a leak, or finding water in 10-Path boxes. Thanks.
Please contact Natalie Yonker, Reactor Engineer at (757) 365-2551 or Natalie_A_Yonker@dom.com
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