[Global] SG Secondary Side Survey

[Gilliam, Adam L]

Joe,

We don't have any data with secondary side drained, but last outage we had a wide range xmitter that was reading 7% higher than actual level. We expected water level to be 72% when it was actually 65%. The top of the tubes were more than likely exposed. See attached survey. General area dose rates are normally 5-10 mRem/hr when we make entries on the lowest level.


Adam Gilliam  : :  Radiation Protection Supervisor  : :  C 573.220.8513
Ameren Missouri  : :  8315 County Road 459  :  Steedman, MO 65077

From: Global <global-bounces at list.rpalara.org> On Behalf Of Coughlin, Joseph J:(Constellation Nuclear)
Sent: Friday, March 17, 2023 9:37 AM
To: global at list.rpalara.org
Subject: [EXTERNAL] [Global] SG Secondary Side Survey

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Morning All,

Am hoping to get some surveys of the SG secondary side while the SG is drained. This outage we are doing some guide vane repairs on top of the SG inside on the 1st, 2nd, and 3rd platforms. We have surveys with the secondary side water level over the tubes, but none when drained. Being challenged based on the schedule to possibly work while drained. Appreciate your time/help.........Thx Joe
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