ML12220A544
| ML12220A544 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 08/08/2012 |
| From: | James Kim Plant Licensing Branch 1 |
| To: | Heacock D Dominion Nuclear Connecticut |
| Kim J | |
| References | |
| TAC ME8442 | |
| Download: ML12220A544 (3) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555*0001 August 8, 2012 Mr. David A. Heacock President and Chief Nuclear Officer Dominion Nuclear Connecticut, Inc.
Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711 SUB~'ECT:
MILLSTONE POWER STATION, UNIT 3 - REQUEST FOR ADDITIONAL INFORMATION REGARDING END OF CYCLE 14 STEAM GENERATOR TUBE INSERVICE INSPECTION REPORT (TAC NO. ME8442)
Dear Mr. Heacock:
By letter dated April 6, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML12109A044), Dominion Nuclear Connecticut, Inc. (the licensee),
submitted information summarizing the results of the 2011 steam generator tube inspections at Millstone Power Station, Unit 3. These inspections were performed during the fourteenth refueling outage.
The U.S. Nuclear Regulatory Commission staff has reviewed the information provided by the licensee and has determined that the enclosed request for additional information (RAJ) is needed in order to complete the review. A response to this RAI is requested to be provided within 60 days. This RAI supersedes the previously issued RAI dated July 27.2012.
If you have any questions regarding this matter, please contact me at 301-415-4125.
Sincerely,
~'ames Kim, Project Manager Plant Licensing Branch 1-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-423
Enclosure:
As stated cc wlencl: Distribution via Listserv
OFFICE OF NUCLEAR REACTOR REGULATION REQUEST FOR ADDITIONAL INFORMATION STEAM GENERATOR TUBE INSERVICE INSPECTION MILLSTONE POWER STATION, UNIT 3 DOCKET NUMBER 50-423 By letter dated April 6, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML12109A044), Dominion Nuclear Connecticut, Inc. (the licensee),
submitted information summarizing the results of the end of cycle 14 steam generator tube inspections at Millstone Power Station, Unit 3. These inspections were performed during the fourteenth refueling outage. In order to complete its review of the documents listed above, the staff needs the following additional information:
- 1. Page 3 of Enclosure 1 to your April 6 letter indicates that secondary side examinations were performed in SG D. Please discuss the results of these examinations.
- 2. Please discuss the scope and results of any examinations of the plugs.
- 3. Please clarify the "old" and "new" offset columns in Tables 3 and 4.
- 4. In SG A (row 5, column 48), anti-vibration bar (AVB) wear indications were reported approximately 11.5 to 12 inches from the 8th hot-leg support. Confirm that these indications are located at the AVBs. If so, please clarify the location relative to the nearest AVB.
- 5. Please clarify the acronym "FK" in Tables 7 and 8. Also, please clarify the cause of the indications attributed to "sled."
- 6. Please clarify whether any high row tubes have potentially elevated residual stresses, as evidenced by the eddy current data (2-sigma tubes). If there are such tubes, please discuss whether any rotating probe exams were performed on these tubes at locations such as the expansion transition, dents, or dings.
Enclosure
August 8, 2012 Mr. David A. Heacock President and Chief Nuclear Officer Dominion Nuclear Connecticut, Inc.
Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060-6711
SUBJECT:
MILLSTONE POWER STATION, UNIT 3 - REQUEST FOR ADDITIONAL INFORMATION REGARDING END OF CYCLE 14 STEAM GENERATOR TUBE INSERVICE INSPECTION REPORT (TAC NO. ME8442)
Dear Mr. Heacock:
By letter dated April 6, 2012 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML12109A044), Dominion Nuclear Connecticut, Inc. (the licensee),
submitted information summarizing the results of the 2011 steam generator tube inspections at Millstone Power Station, Unit 3. These inspections were performed during the fourteenth refueling outage.
The U.S. Nuclear Regulatory Commission staff has reviewed the information provided by the licensee and has determined that the enclosed request for additional information (RAI) is needed in order to complete the review. A response to this RAI is requested to be provided within 60 days. This RAI supersedes the previously issued RAI dated July 27, 2012.
If you have any questions regarding this matter, please contact me at 301-415-4125.
Sincerely, Ira!
James Kim, Project Manager Plant Licensing Branch 1-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-423
Enclosure:
As stated cc w/encl: Distribution via Listserv Distribution:
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Official Record Copy