ML16266A133

Forwards Request for Addl Info Re Response to Generic Ltr 88-11.Response to Encl Questions Requested within 30 Days of Ltr Date

ML16266A133
Person / Time
Site:	Oconee
Issue date:	03/01/1990
From:	Wiens L Office of Nuclear Reactor Regulation
To:	Tucker H DUKE POWER CO.
References
GL-88-11, TAC-71522, TAC-71523, TAC-71524, NUDOCS 9003070255
Download: ML16266A133 (3)

Text

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4gMarch 1, 1990 0

Doc.kets Nos. 50-269, 50-270 and 50-287 Mr. H. B. Tucker, Vice President Nuclear Production Department Duke Power Company 422 South Church Street Charlotte, North Carolina 28242

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION CONCERNING RESPONSE TO GENERIC LETTER 88-11 FOR OCONEE NUCLEAR STATION, UNITS 1, 2, AND 3 (TACS 71522/71523/71524)

The NRC staff is reviewing your responses to Generic Letter 88-11.

We find that further information, as indicated in the enclosure, is required to complete our review. Your response to the enclosed questions is requested within 30 days of the date of this letter. If you have any questions regarding this matter, I may be contacted at (301) 492-1493.

The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.

Sincerely, Original Signed By:

Leonard A. Wiens, Project Manager Project Directorate 11-3 Division of Reactor Projects -

I/II Office of Nuclear Reactor Regulation

Enclosure:

Request for Additional Information cc w/enclosure:

See next page DISTRIBUTION Docket File GLainas OGC (for info. only)

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REQUEST FOR ADDITIONAL INFORMATION RESPONSE TO GENERIC LETTER 88-11 Oconee I

1. The amendment request dated November 15, 1989 stated that the 2 predicted 15 effective full power years (EFPY) fluence is 0.541E19 n/cm2. The staff extrap lated this fluence to an end of life (EOL) value of 1.16E19 n/cm.

BAW-2050 stated that the highest EOL fluence is 1.02E19. Verify that the BAI-2050 values reflect the correct predicted fluence at 15 EFPY and EOL.

2.

Please provide the unirradiated reference temperature RT for all reactor vessel beltline welds and plates.

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3.

BAW-2050 has shown that WF-112 is a surveillance weld; however, it is not clear to the staff that WF-112 is a beltline weld. Verify that WF-112 is a beltline weld, i.e. it must have the same heat number for the weld wire and flux as in the beltline weld.

Oconee II

1. The licensei's submittal stated that the fluence at 15 EFPY is

.5 EJ8 n/cm.

The staff extrapolated this fluence at EOL 2to 1.66E19 n/cm.

BAW-2051 estimated an EOL fluence of 9.57E18 n/cm.

Verify that the BAW-2051 values reflect the correct predicted fluence at 15 EFPY and EOL.

2. Please provide Charpy impact upper shelf energy for the lower nozzle shell belt forging AMX-77.

3. Tables 7-5 and A-1 in BAW-2051 have different values of copper content for the beltline welds. Clarify this apparent discrepancy.

Oconee III

1. The licensee's submittal stated that the 15 EFPY fluence is 7.3E18 n/cm 2 at the vessel inside surface. BAW-1697 stated that the highest 15 EFPY value is 4.05E18 at 1/4T (T=beltline thickness) or 6.72E18 at the inner surface. Verify that the BAW-1697 values reflect the correct fluence at 15 EFPY and EOL.

2. According to BAW-1679, the surveil ance weld WF-209-1 has an upper shelf energy of 49 ft-lb at 3.12E18 n/cm (figure 5-1, BAW-1679).Section IV.B of Appendix G to 10 CFR 50 requires that the upper shelf energy at end of life be above 50 ft-lb. Please provide a clarification for this issue.

3.

Please provide the surveillance capsule reports on capsule OCIII-C and capsule OCIII-D.

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