ML15215A420

Edwin I. Hatch Nuclear Plant, Units 1 and 2, Request for Additional Information on Relief Requests P-2, P-5, and P-9 (TAC Nos. MF6240 and MF6241)

ML15215A420
Person / Time
Site:	Hatch
Issue date:	08/17/2015
From:	Martin R E Plant Licensing Branch II
To:	Pierce C R Southern Nuclear Operating Co
Martin R E
References
TAC MF6240, TAC MF6241
Download: ML15215A420 (4)

Text

REG(J . 0 . "011.L UNITED STATES ... -' 0 <fl ff NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 '("/. . . "" 1-1] o' ***1'. August 17, 2015 Mr. C. R. Pierce Regulatory Affairs Director Southern Nuclear Operating Company, Inc. Post Office Box 1295, Bin -038 Birmingham, AL 35201-1295 SUBJECT: EDWIN I. HATCH NUCLEAR PLANT, UNITS 1 AND 2 (HNP) -REQUEST FOR ADDITIONAL INFORMATION ON RELIEF REQUESTS P-2, P-5, AND P-9 (TAC NOS. MF6240 AND MF6241) Dear Mr. Pierce: By letter dated May 4, 2015, Southern Nuclear Operating Company, Inc. (the licensee) requested Nuclear Regulatory Commission (NRC) approval of changes P-2, P-5, and P-9 for the HNP for the Fifth Ten-Year Interval lnservice Testing Program. In order to continue the review, the U.S. Nuclear Regulatory Commission staff requests additional information as discussed in the Enclosure. It is requested that your response be provided within thirty (30) days of the date of this letter. Docket Nos. 50-321 and 50-366 cc: Distribution via Listserv Sincerely, MaHin, Senior Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation

Reference:

REQUEST FOR ADDITIONAL INFORMATION (RAI) SOUTHERN NUCLEAR OPERATING COMPANY. INC. EDWIN I. HATCH NUCLEAR PLANT, UNITS 1 AND 2 RELIEF REQUESTS P-2, P-5, and P-9 Letter from the Southern Nuclear Operating Company, Inc. (SNC), to NRC, "Submittal of the lnservice Testing Program Relief Requests and Alternatives for Pumps and Fifth Ten-Year Interval," for Edwin I. Hatch Nuclear Plant, Units 1 and 2, Docket Nos. 50-321 and 50-366, dated May 4, 2015 (Agencywide Documents Access and Management System Accession No. ML 15124A904). RAl-P-2-1: In the Relief Request P-2, "Reason for Request, the second paragraph, states that "The Standby Liquid Control (SBLC) Pumps operate at 370 revolution per minute (RPM) (6.2 Hz), which corresponds to a required instrument range of 2.06 Hz to 1000 Hz. The minimum frequency response range of Plant Hatch IST Program instrument is 2.5 Hz, which does not satisfy the code requirements." Please explain and justify the reason for not installing the instruments meeting the Code requirements. The U.S. Nuclear Regulatory Commission (NRC) staff has learned these instruments (meeting the Code requirement) can now be procured from various suppliers at reasonably low cost due to technology advancement and research work performed in the field of instrumentation. (See NUREG-1482, Revision 2, Section 5.13) RAl-P-5-1: Relief Request P-5, Item 5 of "Reason for Request," states, in part, that "The OM Code imposes more stringent hydraulic acceptance criteria on these pumps than for centrifugal or positive displacement pumps. These more stringent hydraulic acceptance criteria place more emphasis on detection of degradation through hydraulic test data than through mechanical test data." The NRC staff reviewed Subsection ISTB of the ASME OM Code, and was unable to confirm the above statement. Please explain and clarify the statement. RAl-P-5-2: Please provide the performance history of these pumps while using the alternative location of these pumps to show that there is no degradation. Also provide the measured vibration values in the previous 10-year interval at the proposed alternative pump's location. Enclosure

-2 -RAl-P-9-1: Relief Request P-9, Item 2 of "Reason for Request," states, in part, that "The OM Code imposes more stringent hydraulic acceptance criteria on these pumps than for centrifugal or positive displacement pumps. These more stringent hydraulic acceptance criteria place more emphasis on detection of degradation through hydraulic test data than through mechanical test data." The NRC staff reviewed the ASME OM Code, Subsection ISTB and was unable to confirm the provided statement. Please explain and clarify the statement, RAl-P-9-2: Please provide the performance history of these pumps while using the alternative location of these pumps to show that there is no degradation. Also provide the measured vibration values in the previous 10-year interval at the proposed alternative pump's location.

Mr. C. R. Pierce Regulatory Affairs Director August 17, 2015 Southern Nuclear Operating Company, Inc. Post Office Box 1295, Bin -038 Birmingham, AL 35201-1295 SUBJECT: EDWIN I. HATCH NUCLEAR PLANT, UNITS 1 AND 2 (HNP) -REQUEST FOR ADDITIONAL INFORMATION ON RELIEF REQUESTS P-2, P-5, AND P-9 (TAC NOS. MF6240 AND MF6241) Dear Mr. Pierce: By letter dated May 4, 2015, Southern Nuclear Operating Company, Inc. (the licensee) requested Nuclear Regulatory Commission (NRC) approval of changes P-2, P-5, and P-9 for the HNP for the Fifth Ten-Year Interval lnservice Testing Program. In order to continue the review, the U.S. Nuclear Regulatory Commission staff requests additional information as discussed in the Enclosure. It is requested that your response be provided within thirty (30) days of the date of this letter. Docket Nos. 50-321 and 50-366 cc: Distribution via Listserv DISTRIBUTION: PUBLIC LPL2-1 R/F RidsAcrsAcnw_MailCTR Resource RidsNrrLASFigueroa Resource RidsNrrPMHatch Resource ADAMS Accession No.: ML15215A420 Sincerely, IRA/ Bob Martin, Senior Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation RidsNrrDorlDpr Resource RidsNrrDorllpl2-1 Resource RidsRgn2MailCenter Resource GBedi, NRR OFFICE DORL/LPL2-1 /PM DORL/LPL2-1 /LA DES/EPNB/BC DORL/LPL2-1 /BC DORL/LPL2-1 /PM NAME BMartin SFigueroa DAiiey RPascarelli BMartin

• DATE 08/14/15 08/04/15 07/29/15 08/14/15 08/1715 OFFICIAL RECORD COPY