ML100620899
| ML100620899 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 03/09/2010 |
| From: | Siva Lingam Plant Licensing Branch II |
| To: | Krich R Tennessee Valley Authority |
| Lingam, S NRR/DORL 415-1564 | |
| References | |
| TAC ME1165, TAC ME1193 | |
| Download: ML100620899 (3) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 March 9, 2010 Mr. Rodney M. Krich Vice President, Nuclear Licensing Tennessee Valley Authority 3R Lookout Place 1101 Market Street Chattanooga, TN 37402-2801
SUBJECT:
SEQUOYAH I\\JUCLEAR PLANT, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING THE CORE OPERATING LIMITS REPORT (TAC NOS. ME1193 AND ME1165)
Dear Mr. Krich:
By letters dated April 27 and April 30, 2009, Tennessee Valley Authority submitted the Sequoyah Nuclear Plant core operating limits reports (COLRs) for Unit 2, Cycle 16, and Unit 1, Cycle 17, respectively, as required by Technical Specification Section 6.9.1.14c. The April 27, 2009, letter indicated that the previous revision to the Unit 2, Cycle 16, COLR had errors in the calculation of departure from nuclear boiling maximum allowable peaking limits.
The Nuclear Regulatory Commission staff is reviewing the submittals and has determined that additional information is required to complete its evaluation. This request was discussed with Mr. Rodney Cook of your staff on March 3, 2010, and it was agreed that a response would be provided by April 5, 2010.
If you have any questions regarding this matter, I can be reached at 301-415-1564.
Sincerely,
~~.~
Siva P. Lingam, Project Manager Plant Licensing Branch 11-2 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-327 and 50-328
Enclosure:
Request for Additional Information cc w/encl: Distribution via Listserv
REQUEST FOR ADDITIONAL INFORMATION REGARDING THE CORE OPERATING LIMITS REPORT SEQUOYAH NUCLEAR PLANT, UNITS 1 AND 2 DOCKET NOS. 50-327 AND 50-328 By letters dated April 27 and April 30, 2009 (Agencywide Documents Access and Management System Accession Nos. ML091210699 and ML091240246, respectively), Tennessee Valley Authority submitted the Sequoyah Nuclear Plant core operating limits reports (COLRs) for Unit 2, Cycle 16, and Unit 1, Cycle 17, respectively, as required by Technical Specification Section 6.9.1.14c. The April 27, 2009, letter indicated that the previous revision to the Unit 2, Cycle 16, COLR had errors in the calculation of departure from nuclear boiling maximum allowable peaking limits. In order to complete its review of the above documents, the Nuclear Regulatory Commission staff needs the following additional information:
- 1. With respect to the SQN Unit 2 Cycle 16 COLR, the licensee stated that an error was identified with the departure from nuclear boiling maximum allowable peaking limits.
Please clarify the following: (a) identify the error that impacted the parameters listed in Section 1.0 of the April 27,2009, submittal; (b) discuss the methodology used to analyze the impact of the input error; and (c) describe the analysis used to determine the impact of the error and to justify that there is sufficient margin to account for the error.
- 2. Please clarify that the SQN Unit 1 Cycle 17 COLR does not have an error similar to the one identified for the Unit 2 Cycle 16 COLR.
Enclosure
- ML100620899 NRR-088 OFFICE LPL2-2/PM LPL2-2/LA NRRlDSS/SRXB/BC LPL2-2/BC (A)
NAME SLingam CSoia GCranston SBailey for DBroaddus DATE 03/09/10 03/09/10 2126110*
03/09/10
- transmltted by memo dated