ML16131A323

Forwards Safety Evaluation Granting 890331,1013,1205 & 08 & 900301 & 0501 Requests for Relief from ASME Code Section XI Requirements

ML16131A323
Person / Time
Site:	Oconee
Issue date:	10/29/1990
From:	Matthews D Office of Nuclear Reactor Regulation
To:	Tucker H DUKE POWER CO.
Shared Package
ML16131A324	List: ML16131A323 ML16131A325
References
TAC-72933, TAC-75182, TAC-75538, TAC-75539, TAC-75540, TAC-75859, TAC-76106, TAC-76107, TAC-76108, TAC-76978, TAC-76979, NUDOCS 9011070361
Download: ML16131A323 (3)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 October 29, 1990 Docket Nos.

50-269, 50-270, and 50-287 Mr. H. B. Tucker, Vice President Nuclear Production Department Duke Power Company P.O. Box 1007 Charlotte, North Carolina 28201-1007

SUBJECT:

REQUEST FOR RELIEF FROM SECTION XI/ASME CODE REQUIREMENTS FOR OCONEE UNITS 1, 2 AND 3 (TACS 72933, 75182, 75859, 75538, 75539, 75540, 76106, 76107, 76108, 76978, 76979)

In letters dated March 31, October 13, December 5 and 8, 1989, and March 1 and May 31, 1990, you requested relief from certain Section XI ASME Code requirements for the Oconee Nuclear Station, Units 1, 2 and 3. These include requests for relief from hydrostatically testing the repair welds in the Emergency Feedwater System seal injection piping; reexamination to verify operability of flange stud holes for Reactor Coolant Pumps 3A2 and 3B1; hydrostatically testing the welds for the installation of valves AS-39 and MS-91 in the Auxiliary Steam and Main Steam Systems; examination of the Control Rod Drive Mechanism (CRDM) motor tube to nozzle pressure retaining bolting for reactor coolant leakage during each refueling outage; examination of CRDM flanges for failed bolting material; hydrostatically testing the repair welds in the Steam Drain System; and examination of the Integral Piping Attachment on the Feedwater System.

The staff has reviewed each of your requests and evaluations which were made in support of the requests. Enclosed is our Safety Evaluation. Based upon the Safety Evaluation, we conclude that the hydrostatic testing and examination requirements of Section XI of the ASME Code are either impractical or unnecessary to perform at Oconee Nuclear Station, Units 1, 2 and 3, and the alternate examinations specified in your submittals ensure an acceptable level of structural integrity of the subject components. The alternate methods of examination are acceptable as discussed in the Safety Evaluation and are imposed in lieu of the applicable Code requirements. Accordingly, relief from the hydrostatic testing and examination requirements for the above welds, flange stud holes, pressure retaining bolting, and integral piping attachments is granted as requested, pursuant to 10 CFR 50.55a(a)(3)i, 50.55a(a)(3)ii, and F'C&

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H. October 29, 1990 50.55a(g)(6)(i). This relief is authorized by law and will not endanger life or property or the common defense and security and is otherwise in the public interest given due consideration to the burden that could result if the requirements were imposed on your facility.

Sincerely, Original signed by:

David B. Matthews, Director Project Directorate 11-3 Division of Reactor Projects -

I/II Office of Nuclear Reactor Regulation

Enclosure:

• As stated cc w/encl.:

See next page DISTRIBUTION:

Docket File NRC & Local PDRs CY Cheng 7/D/4 PD 11-3 R/F F Litton 7/D/4 T. Murley/F. Miraglia 12-G-18 J. Partlow 12-G-18 C. Rossi 11-E-4 S. Varga 14-E-4 G. Lainas 14-H-3 R. Ingram F. Rinaldi L. Wiens OGC (info. only) 15-B-18 E. Jordan MNBB-3701 G. Hill (12)

P1-37 ACRS (10)

Pl-135 GPA/PA 17-F-2 OC/LFMB MNBB-4702 Oconee R/F R. Borchardt, RII OFFICIAL RECORD COPY Document Name: OCONEE RELIEF ASME LA:PDII3L, PM: PDI0Y Pk.DII3 GLD:

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Mr. H. B. Tucker Oconee Nuclear Station Duke Power Company Units Nos. 1, 2 and 3 cc:

Mr. A. V. Carr, Esq.

Mr. Paul Guill Duke Power Company Duke Power Company P. 0. Box 33189 Post Office Box 33189 422 South Church Street 422 South Church Street Charlotte, North Carolina 28242 Charlotte, North Carolina 28242 J. Michael McGarry, III, Esq.

Bishop, Cook, Purcell & Reynolds Mr. Alan R. Herdt, Chief 1400 L Street, N.W.

Project Branch #3 Washington, D.C. 20005 U.S. Nuclear Regulatory Commission 101 Marietta Street, NW, Suite 2900 Mr. Robert B. Borsum Atlanta, Georgia 30323 Babcock & Wilcox Nuclear Power Division Ms. Karen E. Long Suite 525 Assistant Attorney General 1700 Rockville Pike N. C. Department of Justice Rockville, Maryland 20852 P.O. Box 629 Raleigh, North Carolina 27602 Manager, LIS NUS Corporation 2536 Countryside Boulevard Clearwater, Florida 34623-1693 Senior Resident Inspector U.S. Nuclear Regulatory Commission Route 2, Box 610 Seneca, South Carolina 29678 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W., Suite 2900 Atlanta, Georgia 30323 Mr. Heyward G. Shealy, Chief Bureau of Radiological Health South Carolina Department of Health and Environmental Control 2600 Bull Street Columbia, South Carolina 29201 Office of Intergovernmental Relations 116 West Jones Street Raleigh, North Carolina 27603 County Supervisor of Oconee County Walhalla, South Carolina 29621