ML16148A515

Advises That Relief from Hydrostatic Test Requirement of Section IX Following Valve Replacements Not Necessary

ML16148A515
Person / Time
Site:	Oconee
Issue date:	05/23/1991
From:	Matthews D Office of Nuclear Reactor Regulation
To:	Tuckman M DUKE POWER CO.
References
NUDOCS 9106050105
Download: ML16148A515 (4)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 May 23, 1991 Docket No. 50-270 Mr. M. S. Tuckman Vice President Nuclear Operations Duke Power Company Post Office Box 1007 Charlotte, North Carolina 28201-1007

SUBJECT:

OCONEE, UNIT 2 - REQUEST FOR RELIEF FROM HYDROSTATIC TEST REQUIREMENT OF SECTION IX FOLLOWING VALVE REPLACEMENTS In letters dated October 11, 1990, and October 23, 1990, Duke Power Company submitted to the NRC requests for relief from the hydrostatic test requirements of the 1980 Edition through Winter 1980 Addenda of Section XI of the ASME Code for welds made after replacement of feedwater valves 2FDW-36 and 2FDW-141, and main steam valves 2SD-418, 2SD-419, 2SD-420, and 2SD-421 at Oconee Unit 2. The Section XI Code requires that a hydrostatic test of the welds be performed prior to resumption of service. Your submittal provided reasons why the requirement is impractical to perform and proposed alternatives to the requirement.

We have determined that you have encountered a special circumstance that is covered by ASME Code Case N-416, "Alternative Rules for Hydrostatic Testing of Repair or Replacement of Class 2 Piping,Section XI, Division 1."

This Code Case allows the hydrostatic test of welds in the situations described to be deferred to the next regularly scheduled system hydrostatic test for that system. You state in your letters that a 100% radiographic testing and a VT-2 inspection will be performed on Feedwater (FDW) systems welds for installing valve 2FDW-36 and that a visual examination (VT-2) and surface examination will be performed on other welds. These examinations satisfy the conditions stated in the Code Case. Since this Code Case has been reviewed and approved by the NRC as an acceptable Code Case and is listed in Regulatory Guide 1.147, "Inservice Inspection Code Case Acceptability, ASME Section XI, Division 1," Revision 8, August 1990, the staff has determined that relief from the requirement is not necessary. You should implement usage of the Code Case and indicate this usage in the appropriate inservice inspection related documents.

9106050105 910523 PDR ADOCK 05000270 P

PDR

Mr. M. S. Tuckman 2 -

May 23, 1991 This completes action under TAC Nos. 77999, 79000 and 79001.

If you have any questions concerning this issue, please call Len Wiens at (301) 492-1495.

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

I/II Office of Nuclear Reactor Regulation cc:

See next page

Mr. M. May 23, 1991 This completes action under TAC Nos. 77999, 79000 and 79001. If you have any questions concerning this issue, please call Len Wiens at (301) 492-1495.

Sincerely,

/s/

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

I/II Office of Nuclear Reactor Regulation cc:

See next page DISTRIBUTION:

Docket File NRC & Local PDRs TMurley/FMiraglia Oconee Reading File PDII-3 Reading File GPA/PA OC/LFMB JWechselberger SVarga GLainas RIngram LWiens DMatthews OGC, 15B18 EJordan, MNBB3701 ACRS (10), P-315 LReyes, RII CYCheng, 7D4 GJohnson, 7D4 GHill (3)

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5/-'IY/91

5/9./91 OFFICIAL RECORD COPY Document Name:

TUCKMAN LTR 4/30

Mr.-M.S. Tuckman Oconee Nuclear Station Duke Power Company UnitsNos. 1, 2 and 3 cc:

Mr. A.V. Carr, Esq.

Mr. Stephen Benesole Duke Power Company Duke Power Company 422 South Church Street Post Office Box 1007 Charlotte, North Carolina 28242-0001 Charlotte, North Carolina 28201-1007 J. Michael McGarry, III, Esq.

Winston and Strawn 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 Mr. R.L. Gill, Jr.

2650 McCormick Drive, 3 Floor Nuclear Production Department Clearwater, Florida 34619-1035 Duke Power Company P.O. Box 1007 Senior Resident Inspector Charlotte, North Carolina 28201-1007 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