ML15079A099

Request for Additional Information

ML15079A099
Person / Time
Site:	Summer
Issue date:	03/26/2015
From:	Shawn Williams Plant Licensing Branch II
To:	Gatlin T South Carolina Electric & Gas Co
Williams S
References
TAC MF5164
Download: ML15079A099 (3)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 March 26, 2015 Mr. Thomas D. Gatlin Vice President, Nuclear Operations South Carolina Electric & Gas Company Virgil C. Summer Nuclear Station Post Office Box 88, Mail Code 800 Jenkinsville, SC 29065

SUBJECT:

VIRGIL C. SUMMER NUCLEAR STATION, UNIT NO. 1 - REQUEST FOR ADDITIONAL INFORMATION (TAC NO. MF5164)

Dear Mr. Gatlin:

By letter dated November 5, 2014 (Agencywide Documents Access and Management System Accession No. ML14314A033), South Carolina Electric & Gas (SCE&G, the licensee) submitted information summarizing the results of the. spring 2014 steam generator tube inspections performed at Virgil C. Summer Nuclear Station, Unit 1.

The NRC staff has determined that additional information is needed to continue the review as discussed in the Enclosure. We request that SCE&G respond to these RAls within 60 days of the date of this letter. Please note that the NRC staff's review is continuing and further requests for information may be developed.

Sincerely, Shawn Williams, Senior Project Manager Plantlicensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-395

Enclosure:

Request for Additional Information cc w/encl: Distribution via Listserv

REQUEST FOR ADDITIONAL INFORMATION SPRING 2014 STEAM GENERATOR INSPECTIONS VIRGIL C .. SUMMER NUCLEAR STATION. UNIT NO. 1 DOCKET NO. 50-395 By letter dated November 5, 2014 (Agencywide Documents Access and Management System Accession No. ML14314A033), South Carolina Electric & Gas (the licensee) submitted information summarizing the results of the spring 2014 steam generator tube inspections performed at Virgil C. Summer Nuclear Station, Unit 1. These inspections were performed during refueling outage 21.

In order to complete its review, the U.S. Nuclear Regulatory Commission staff requests the following additional information:

RAI No.1 Please provide the cumulative number of effective full power months (EFPMs) that the steam generators had operated for the last 4 refueling outages. Please also provide the number of EFPMs that the steam generators (SGs) had operated at the time of the first inservice inspection.

RAINo.2 Please discuss the results of the channel head bowl inspections, upper bundle video inspection in SG A, steam drum inspections, and tube plug inspections. For the tube plug inspections, were all plugs present and in their proper locations? Was any degradation observed?

RAI No. 3 In Table 2, there is an inspection category for "cold leg new bobbin wear." Were all of the new wear indications located on the cold leg? If not, were new wear indications in the hot leg inspected?

RAI No. 4 Please discuss which tubes would not pass a bobbin probe. Were these all low row (i.e., rows 1 and 2) tubes? If not, please discuss the nature of the restrictions in these tubes.

ML15079A099 *by memo OFFICE LPL2-1/PM LPL2-1/LA NRR/DE/ESGB/BC LPL2-1/BC LPL2-1/PM NAME SWilliams SFigueroa GKulesa* RPascarelli SWilliams DATE 03/25/15 03/24/15 03/16/15. 03/25/15 03/26/15