[Global] Emergent Information Request - Core Barrel EDM Tool

[Tutterow, Jennifer]

Salem has not had to use EDM for the nozzles, but we have used EDM many times over for repair of baffle-former bolts, Thermal shield support block bolts, and flexure replacement.

I am happy to help in any way I can.  I don't know if it would be easier to call or zoom or if you would just like some documents emailed.

One of the biggest things is that EDM creates "swarf".  The fine metal chips/shavings/debris can get EVERYWHERE.  We always use instacote but it seems to be extra useful following the EDM outages.  We have seen much hotter RCS filters following EDM heavy outages as some of that debris is still clearing the system after start up.

Let me know how else I can help - I will work on pulling some of our documents from EDM heavy outages

Jen Tutterow
Radiological Engineer - Salem ALARA
* PSEG Nuclear LLC
Jennifer.Tutterow at pseg.com<mailto:Jennifer.Tutterow at pseg.com>
856-339-1575



From: Global <global-bounces at list.rpalara.org> On Behalf Of Branham, Christy Munn
Sent: Wednesday, December 7, 2022 12:01 PM
To: global at list.rpalara.org
Cc: Gainey, Taylor Price <Taylor.Gainey at duke-energy.com>; Dunton, Carrie T <Carrie.Dunton at duke-energy.com>
Subject: [EXTERNAL] [Global] Emergent Information Request - Core Barrel EDM Tool

***CAUTION***

***CAUTION***

***CAUTION***

This e-mail is from an EXTERNAL address. The actual sender is (global-bounces at list.rpalara.org<mailto:global-bounces at list.rpalara.org>) which may be different from the display address in the From: field. Be cautious of clicking on links or opening attachments. Suspicious? Report it via the Report Phishing button. On mobile phones, forward message to Cyber Security.



All,

I work at Robinson Nuclear Plant, we are currently in a refueling outage working through a Level 1 Emergent Issue. While performing 10 year ISI UT inspections on the core barrel, an indication has been identified on the core barrel in the area just below the hot leg outlet nozzle. This indication will likely require an EDM (Electric Discharge Machining) method to be used to remove the metal at the tips of the flaw to prevent it from growing further.

I'm interested in obtaining any available information in the industry on this activity or using the EDM tool. Any site that has dealt with a similar issue, please provide me with an RP contact, ALARA plan, RWP, and cavity decon plan after completion.

Thank you all in advance for sending any information you can provide.

Thank you,
Christy M. Branham
RP Superintendent
Robinson Nuclear Plant- Duke Energy
843.951.3150 (w)
843.601.7452 (c)
Christy.Branham at duke-energy.com<mailto:Christy.Branham at duke-energy.com>
[cid:image001.png at 01D90A34.A2E0F810]

The information contained in this e-mail, including any attachment(s), is intended solely for use by the named addressee(s). If you are not the intended recipient, or a person designated as responsible for delivering such messages to the intended recipient, you are not authorized to disclose, copy, distribute or retain this message, in whole or in part, without written authorization from PSEG. This e-mail may contain proprietary, confidential or privileged information. If you have received this message in error, please notify the sender immediately. This notice is included in all e-mail messages leaving PSEG. Thank you for your cooperation.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://list.rpalara.org/pipermail/global_list.rpalara.org/attachments/20221207/d7188411/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 7090 bytes
Desc: image001.png
URL: <http://list.rpalara.org/pipermail/global_list.rpalara.org/attachments/20221207/d7188411/attachment-0001.png>