ML14120A003
| ML14120A003 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 04/28/2014 |
| From: | Ed Miller Division of Operating Reactor Licensing |
| To: | Crane K Duke Energy Corp |
| References | |
| Download: ML14120A003 (3) | |
Text
1 NRR-PMDAPEm Resource From:
Miller, Ed Sent:
Monday, April 28, 2014 3:17 PM To:
'kay.crane@duke-energy.com'
Subject:
Draft RAI for McGuire 1 Steam Generator Report Attachments:
Draft RAI.docx
- Kay, The NRC staffs draft RAI for the subject report is attached to this e-mail. The draft RAI is not an official NRC staff request and is being provided to you to facilitate a subsequent conference call to determine: 1) If the questions clearly convey the NRC staff information needs; 2) Whether the regulatory basis for the questions is understood; and 3) Whether the information is already available in existing, docketed, correspondence. After youve had a chance to review the draft information request, please contact me to schedule the conference call. Thanks.
Ed Miller (301) 415-2481
Hearing Identifier:
NRR_PMDA Email Number:
1258 Mail Envelope Properties (9C2386A0C0BC584684916F7A0482B6CAF9BC2D492B)
Subject:
Draft RAI for McGuire 1 Steam Generator Report Sent Date:
4/28/2014 3:17:03 PM Received Date:
4/28/2014 3:17:00 PM From:
Miller, Ed Created By:
Ed.Miller@nrc.gov Recipients:
"'kay.crane@duke-energy.com'" <kay.crane@duke-energy.com>
Tracking Status: None Post Office:
HQCLSTR02.nrc.gov Files Size Date & Time MESSAGE 624 4/28/2014 3:17:00 PM Draft RAI.docx 27717 Options Priority:
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Recipients Received:
DRAFT REQUEST FOR ADDITIONAL INFORMATION MCGUIRE NUCLEAR STATION, UNIT 1 STEAM GENERATOR INSPECTION REPORT EOC 22 DOCKET NO. 50-369 By letter dated July 11, 2013, (Agencywide Documents Access and Management System (ADAMS) Accession No. ML13205A469), Duke Energy Carolinas (Duke) submitted an in-service inspection report for the McGuire Unit 1 end of cycle 22 steam generator inspection. In order for the NRC staff to complete its review of the report, the following additional information is requested.
- 1. Please discuss the scope and results of any inspections (other than the steam generator tube plug inspections) performed in the SG primary channel heads.
- 2. In section a of the report, the acronym TWD is used; please define and clarify if this is referring to new wear indications.
- 3. In section g of the report, seven indications of wear due to foreign objects were noted, four with no evidence of a foreign object remaining and three with evidence of a foreign object remaining. Please reconcile these numbers against what was provided in the Attachment 1 tables of the report, which seem to indicate that there are four indications of wear with possible loose parts present (LPIs).
- 4. Please clarify the statement in section e of your report. Did all the tubes that were plugged have wear attributed to a loose part that could not be removed?
Please clarify which tubes were plugged. Also, please discuss whether a visual inspection was performed at the location of the LPIs in SG D (since all four indications appear to be in the same general vicinity).
- 5. Please provide the effective full power years of operation for each refueling outage since 2008.