RNP-RA/12-0010, Response to NRC Request for Additional Information Related to Request for Technical Specifications Changes to Section 3.8.3, Diesel Fuel Oil and Starting Air, & Section 3.8.5, DC Sources Shutdown

Response to NRC Request for Additional Information Related to Request for Technical Specifications Changes to Section 3.8.3, Diesel Fuel Oil and Starting Air, & Section 3.8.5, DC Sources Shutdown

ML12068A132
Person / Time
Site:	Robinson
Issue date:	02/23/2012
From:	Kamilaris C Progress Energy Carolinas
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RNP-RA/12-0010, TAC ME5408
Download: ML12068A132 (3)

Text

Progress Energy 10 CFR 50.90 Serial: RNP-RA/12-0010 FEB 2 3 2012'ATTN: Document Control Desk United States Nuclear Regulatory Commission Washington, DC 20555-0001 H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 DOCKET NO. 50-261/RENEWED LICENSE NO. DPR-23 RESPONSE TO NRC REQUEST FOR ADDITIONAL INFORMATION RELATED TO REQUEST FOR TECHNICAL SPECIFICATIONS CHANGES TO SECTION 3.8.3, DIESEL FUEL OIL AND STARTING AIR, AND SECTION 3.8.5, DC SOURCES SHUTDOWN (TAC_NO. ME5408)Ladies and Gentlemen:

By letter dated January 24, 2012, the NRC requested that Carolina Power and Light Company, now doing business as Progress Energy Carolinas, Inc. (PEC), respond to a request for additional information (RAI) regarding the proposed license amendment request to Technical Specifications Section 3.8.3, Diesel Fuel Oil and Starting Air that was submitted on January 20, 2011. Attachment I to this letter provides the RAI response for H. B. Robinson Steam Electric Plant, Unit No. 2.There are no commitments made in this submittal.

If you should have any questions regarding this submittal, please contact Mr. R. Hightower at (843) 857-1329.In accordance with 10 CFR 50.91, a copy of this application is being provided to the State of South Carolina.I declare under penalty of perjury that the foregoing is true and correct. Executed On: "z2 (12.-Sincerely, Christos Kamilaris Manager -Support Services -Nuclear MSC/msc Attachments 406(Progress Energy Carolinas, Inc.Robinson Nuclear Plant 3581 West Entrance Road Hartsville, SC 29550 United States Nuclear Regulatory Commission Serial: RNP-RA/12-0010 Page 2 of 2 c: Ms. S. E. Jenkins, Manager, Infectious and Radioactive Waste Management Section (SC)Mr. A. Gantt, Chief, Bureau of Radiological Health (SC)Mr. V. McCree, NRC, Region II Mr. A. Billoch-Colon, NRC Project Manager, NRR NRC Resident Inspector, HBRSEP Attorney General (SC)

Attachment Ito Serial: RNP-RA/12-0010 Page 1 of 1 H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 RESPONSE TO NRC REQUEST FOR ADDITIONAL INFORMATION RELATED TO REQUEST FOR TECHNICAL SPECIFICATIONS CHANGES TO SECTION 3.8.3, DIESEL FUEL OIL AND STARTING AIR, AND SECTION 3.8.5, DC SOURCES SHUTDOWN (TAC_NO. ME5408)By letter to the Nuclear Regulatory Commission (NRC) dated January 20, 2011, (Agencywide Documents Access and Management System (ADAMS) Accession No. ML110310012)

Carolina Power & Light Company, doing business as Progress Energy Carolinas, Inc., submitted a license amendment request to revise Technical Specifications (TS) Section 3.8.3, "Diesel Fuel Oil and Starting Air," and TS Section 3.8.S, "DC Sources -Shutdown," for the H. B. Robinson Steam Electric Plant, Unit No.2. The NRC staff has been reviewing the submittal and has determined that additional information is needed to complete its review.NRC Ouestion: The submittal states: The proposed change to TS 3.8.3 revises the minimum air start receiver pressure as specified in Condition D from 100 psig to 150 psig. The current value of 100 psig is non-conservative with the EDG vendor (Fairbanks Morse) recommendation of a minimum air pressure of 150 psig to ensure a reliable start.Provide an analysis or calculation to justify the Fairbanks Morse recommendation that a minimum air pressure of 150 psig in the air start receiver will ensure a reliable start for each Robinson EDG.Response: The requested amendment to increase the minimum required starting air pressure from 100 psig to 150 psig was based on vendor recommendations.

Calculation RNP-M/MECH-1815, Revision 1, which is attached to this enclosure, provides an analysis to validate that 150 psig would provide reliable starting capability for the Robinson emergency diesel generators (EDGs).In summary, the attached calculation determined the amount of available energy contained in the air receiver at a pressure of 150 psig was approximately twice the energy (75,000 ft lbf versus 38,000 ft lbf) available at an air receiver pressure of 120 psig which was used in a successful start during the initial startup testing. The amount of air in the air receiver at 150 psig provides sufficient energy to ensure a reliable start for each Robinson EDG.