RNP-RA/10-0041, Supplemental Information to Request for Technical Specifications Change Regarding Steam Generator Alternate Repair Criteria

Supplemental Information to Request for Technical Specifications Change Regarding Steam Generator Alternate Repair Criteria

ML101190170
Person / Time
Site:	Robinson
Issue date:	04/22/2010
From:	Castell C Progress Energy Carolinas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RNP-RA/10-0041
Download: ML101190170 (3)

Text

9 Progress Energy 10 CFR 50.90 Serial: RNP-RA/10-0041 APR 2.2 2010 United States Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 DOCKET NO. 50-261/LICENSE NO. DPR-23 SUPPLEMENTAL INFORMATION TO REQUEST FOR TECHNICAL SPECIFICATIONS CHANGE REGARDING STEAM GENERATOR ALTERNATE REPAIR CRITERIA Ladies and Gentlemen:

In a letter dated December 16, 2009, as supplemented by a letter dated March 11, 2010, Carolina Power and Light Company, also known as Progress Energy Carolinas (PEC), Inc.,

submitted a request for an amendment to the Technical Specifications (TS) contained in Appendix A of the Operating License for H. B. Robinson Steam Electric Plant (HBRSEP),

Unit No. 2. The proposed amendment would modify TS 5.5.9 to revise the steam generator (SG) alternate repair criteria and TS 5.6.8 to revise the SG tube inspection reporting requirement. This letter provides supplemental information related to that amendment request.

In the December 16, 2009 letter, PEC committed to perform a one-time verification of the expansion locations to determine if any significant deviations exist in the distance from the top of the tubesheet (TTS) to the bottom of the expansion transition (BET). This verification was completed by analyzing the bobbin probe data from the following inspections:

" SG-A: October 1999, October 2002

• SG-B: May 2004

" SG-C: April 2001, October 2002 The analysis of the bobbin probe data was performed by automatic computer analysis in accordance with Westinghouse procedure MRS-GEN-1301, Rev. 1. Results from the automatic analysis for BET locations greater than 0.3 inch below the TTS were further reviewed to verify that the identified position of the BET was not affected by manufacturing or data artifacts that were improperly interpreted as the TTS or the BET.

Progress Energy Carolinas, Inc. A 001 Robinson Nuclear Plant 3581 West Entrance Road Hartsville, SC 29550

United States Nuclear Regulatory Commission Serial: RNP-RA/10-0041 Page 2 of 2 The following table provides a summary of the tubes where the results were greater than 0.3 inches. Based on this data, 14 tubes were determined to exceed 0.5 inches. PEC commits to perform an inspection of tubes that exceed 0.5 inches. These tubes are in addition to the two tubes that are not fully expanded that had been previously identified for inspection. The inspection for these tubes will be for the full length of the tube within the tubesheet on the side (hot leg or cold leg) that exceeds the 0.5 inch criterion.

Total Number of Tubes with BET within the Listed Ranges BET Location Relative to TTS (distance in inches)

I* t 7 7 I 1.2 to 1.1 1.1 to 1.0 1.0 to 0.9 0.9 to 0.8 0.8 to 0.7 0.7 to 0.6 0.6 to 0.5 0.5 to 0.4 0.4 to 0.3 0 1 0 0 0 0 2 9 108 1 0 0 1 2 0 4 23 120 0 0 0 0 0 2 1 39 265 1 1 0 1 2 2 7 71 493 Attachment I provides an Affirmation pursuant to 10 CFR 50.30(b).

In accordance with 10 CFR 50.91 (b), PEC is providing the State of South Carolina with a copy of this supplemental information for the proposed license amendment.

If you have any questions concerning this matter, please contact me at (843) 857-1626.

Sincerely, Curt Castell Supervisor - Licensing/Regulatory Programs CAC/rac Attachments I. Affirmation c: Ms. S. E. Jenkins, Manager, Infectious and Radioactive Waste Management Section (SC)

Mr. A. Gantt, Chief, Bureau of Radiological Health (SC)

Mr. L. A. Reyes, NRC, Region II Mr. T. Orf, NRC Project Manager, NRR NRC Resident Inspectors, HBRSEP Attorney General (SC)

United States Nuclear Regulatory Commission Attachment I to Serial: RNP-RA/10-0041 Page 1 of 1 AFFIRMATION The information contained in letter RNP-RA/1 0-0041 is true and correct to the best of my information, knowledge, and belief, and the sources of my information are officers, employees, contractors, and agents of Carolina Power and Light Company, also known as Progress Energy Carolinas, Inc. I declare under penalty of perjury that the foregoing is true and correct.

Executed On: j0dl

-- e- E. A. AcCa ney/

Vice President, HBRSE , Unit No. 2