ML102430446

SQN 2 SG ISI Report Clarification

ML102430446
Person / Time
Site:	Sequoyah
Issue date:	08/31/2010
From:	Cook R Tennessee Valley Authority
To:	Siva Lingam Plant Licensing Branch II
Lingam, S NRR/DORL 415-1564
References
TAC ME3400, TAC ME3971
Download: ML102430446 (1)

Text

ADAMS ACCESSION NO. ML102430446 From: Cook, Rodney Michael [rmcook0@tva.gov]

Sent: Tuesday, August 31, 2010 11:51 AM To: Lingam, Siva Cc: Karwoski, Kenneth

Subject:

RE: Sequoyah 2 SG ISI Report (TAC Nos. ME3400 and ME3971)

The information that I received on this question is as follows:

The tube with the large growth did not have small geometry indications. This tube was mentioned because of its large growth which prompted us to be cautious with regards to plugging tubes. The tube referred to in response #16, Since the tube in question had these ding-like indications.., is the tube with these small geometry indications. The tube with the large growth indication had no discernible similarity to the tube we preventively plugged.

I believe this answers your question.

From: Lingam, Siva [1]

Sent: Friday, August 27, 2010 2:23 PM To: Cook, Rodney Michael Cc: Broaddus, Doug; Karwoski, Kenneth

Subject:

Sequoyah 2 SG ISI Report (TAC Nos. ME3400 and ME3971)

We would like to get clarification on one point (We dont need a formal letter from you - a verbal response is OK).

The question relates to RAI 16 in TVAs July 16, 2010 letter. In that response, you indicated that the one tube plugged for geometry had some small ding-like signals. You then indicated you experienced large growth in one of the support plate indications and were unable to determine the cause of the large growth.

The next statement in your response is that Since the tube in question had these ding-like indications..

Our question is which tube are you talking about? Are you saying that the tube that had the large voltage growth also had these ding-like indications or are you simply saying that you preventively plugged the tube with the ding-like indications to eliminate the possibility of a high growth indication? If the large growth indication also had these ding-like indications, were all tubes with these ding-like indications preventively plugged?

Siva P. Lingam U.S. Nuclear Regulatory Commission Project Manager (NRR/DORL/LPL2-2)

Sequoyah Nuclear Plant Location: O8-D5; Mail Stop: O8-G9a Telephone: 301-415-1564; Fax: 301-415-1222 E-mail address: siva.lingam@nrc.gov

E-mail Properties Mail Envelope Properties (BB92FFE197756B4880158C9914E2DE8E104321BE)

Subject:

RE: Sequoyah 2 SG ISI Report (TAC Nos. ME3400 and ME3971)

Sent Date: 8/31/2010 11:52:15 AM Received Date: 8/31/2010 11:52:15 AM From: Cook, Rodney Michael Created By: rmcook0@tva.gov Recipients:

Siva.Lingam@nrc.gov (Lingam, Siva)

Tracking Status: None Kenneth.Karwoski@nrc.gov (Karwoski, Kenneth)

Tracking Status: None Post Office:

TVACOCXVS1.main.tva.gov Files Size Date & Time MESSAGE 18854 8/31/2010 Options Expiration Date:

Priority: olImportanceNormal ReplyRequested: False Return Notification: False Sensitivity: olNormal Recipients received: