ML19345E866
| ML19345E866 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 01/21/1981 |
| From: | Novak T Office of Nuclear Reactor Regulation |
| To: | Buck J, Quarles L, Rosenthal A NRC ATOMIC SAFETY & LICENSING APPEAL PANEL (ASLAP) |
| Shared Package | |
| ML19345E867 | List: |
| References | |
| NUDOCS 8102060295 | |
| Download: ML19345E866 (3) | |
Text
..... s UNITED STATES y
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NUCLEAR REGULATORY COMMISSION E
j W ASHINCTON, D. C. 20555
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January 21, 1981 p
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ED O:? ;ggI Alan S. Rosenthal Esq., Chairman 2
Dr. John H. Buck, Member
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CU$$ Pros Dr. Lawrence R. Quarles, Member Atomic Safety and Licensing Appeal Board f,.
Washington, D. C.
20555 16
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In the Matter of Virginia Electric and Pcwer Company (Licensee)
(North Anna Power Station, Units 1 and 2)
Docket Nos. 50-338/339 (Turbine Missile Issue)
Gentlemen:
In our letter to you dated December 23, 1980, we informed you of new information from the inspection of the Low Pressure Turbine discs at Farley, Unit I which could have relevance to the North Anna Turbine Missile Issue.
This information had been received on an informal basis.
We have now received the licensee's formal submittal of the test results for the Farley, Unit 1 turbine inspection. This submittal lists all of the identifiet' cracks, describes the ultrasonic techniques used, and has several tables,sith calculations for reinspection or inspection times.
It should be noted that the numbers appearing in these tables regarding inspection times were neither calculated nor have they been verified by the NRC staff at this time. This submittal was enclosed in a letter from F. L. Clayton, Jr., Senior Vice President of Alabama Power Company to Steven A. Yarga, Chief, Operating Reactors Branch No. 1, dated January 12, 1981, in which the Staff was advised that the licensee is in the process of installing in Farley, Unit 1 two new LP Turbine Rotors (originally intended for the Carolina Power and Light Shearon Harris Plant) that were obtained through Westinghouse. A copy of this letter and the enclosure are attached for your information.
Also attached is a preliminary notification issued by the Office of Inspection and Enforcement dated January 15, 1981. The preliminary notification relates to information being generated by the ultrasonic testing performed by Virginia Electric Power Company on the turbines in the North Anna Unit 1 facility. As noted in the preliminary notification, the information presented is as initially received without verification or evaluation by t'ie NRC Staff.
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2-The information provided by this letter and its attachments is related 4
to the turbine missile issue pending before the Board in this proceeding.
The Staff shi.11 continue to keep the Board informed of new information regarding this matter.
Sincerely,
.U'
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Thomas M. Novak, Assistant Director for Operating Reactors Division of Licensing Attachments:
As Stated cc:
E. Case D. Eisenhut R. Vollmer V. Noonan T. Novak R. Clark R. Tedsco L. Engle D. Swanson cc w/ enclosure:
See next page
l Mr. J. H. Ferguson Virginia Electric and Power Company cc: Richard M. Foster, Esq.
Mrs. June Allen Musick, Williamson, Schwartz, Ncrth Anna Environmental Coalition leavenworth I Cope, P.C.
1105-C Olive Street P. O. Box 4579 Greensboro, North Carolina 27401 Boulder, Colorado 80306 Michael W. Maupin, Esquire Mr. James Torson Hunton, Williams, Gay and Gibson 501 Leroy P. O. Box 1535 Socorro, New Mexico 87801 Richmond, Virginia 23212 Mrs. Margaret Dietrich Route 2 Box 568 Alderman Library Gordonsville, Virginia 22042 Manuscripts Department University of Virginia Charlottesville, Virginia 22901 Mr. James C. Dunstanca State Corporation Comission comonwealth of Virginia Mr. Edward Kube Board of Supervisors Blardon Building Louisa County Courthouse Richmond, Virginia 23209 P. O. Box 27 Louisa, Virginia 23093 U. S. Environmental Protection Agency R'egion III Office ATTN: EIS C00RDINA10R Ellyn R. Weiss, Esquire Sheldon, Harmon, Roisman and Weiss Curtis Building 1725 I Street, N.W., Suite 506 6th and Walnut Streets k'ashington, D. C.
20006 Philadelphia, Pennsylvania 19106 Df. rector, Criteria and Standards Etision Mr. W. R. Cartwright Station Manager Office of P.adiation Programs (ANTv-L60)
P. D. Box 402 Mineral. Ytrginia 23117 U.S. Enviro:he=tel Protect.ica Ageny
'n'ashington, D.C.
20460 Mr. Anthony Gambardella Office of the Attorney General 11 South 12th Street - Room 305 Mr. Paul W. Purdom Environmental Studies Institute Richmond, Virginia 23219 Drexel University 32nd and Chestnut Streets Mr. Allan Tattersall Philadelphia, Pennsylvania 19104 Resident Inspector / North Anna c/o U.S. NRC Atomic Safety and 1.icensing P. O. Box 128 Appeal Board Panel Spotsylvania, Virginia 22553 U. 5. Nuclear Regulatory.Comission Washington, D. C.
20555 Comonwealth of Virginia Council on the Environment 903 Ninth Street Office Building Richmond, Virgin.f a 23129 e
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Alalama rgwer CornDany 600 Nortn 18th street Post omco Bos 2641 Birmiegnam. Alacema 35291 Teiepnone 205 2$0-1000 D'
F. L CLMToN. JR.
senior Vice President MabarTla NWer the sournem ear c sntem L
January 12, 1981
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Docket No. 50-348
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- .. i Mr. Steven A. Varga, Chief
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Operating Reactors Branch 1
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Division of Licensing U. S. Nuclear Regulatory Comission Washington, D. C.
20555 JOSEPH M. FARLEY NUCLEAR PLANT - UNIT 1 1.0W PRESSURE (LP) TURSINE DISC INSPECTION RESULTS
Dear Mr. Varga:
In response to your letter of January 5,1981 the results of the LP Turoine Disc inspection recently conducted at the Farley Nuclear Plant are submitted as Enclosure (1).
All discs on LP Rotor 1 and LP Rotor 2 were inspected using ultrasonic techniques developed by Westinghouse specifically for this application.
During the inspection, cracks were discovered in some discs; the size and location of which are given in Enclosure (1).
The aspect ratio of the cracks cannot be determined by ultrasonic techniques because the axial depth (or length) of the crack cannot be measured; therefore, we are unable to provide this information.
Alabama Power Company is in the process of installing in Farley Nuclear Plant Unit 1 two new LP Turbine Rotors (originally intended for the Carolina Power and Light Shearon Harris Plant) that were obtained through Westinghouse. The discs in the new rotors are the same Westinghouse B87.81 design as the existing Farley Nuclear Plant Unit 1 discs. These new rotors have been evaluated using the present-NRC crack growth rate formulas and were found to meet service life requirements for cycle 3 for Farley Nuclear Plant Unit 1.
The results of these calculations are included in Enclosure (1), Table 2.
The detailed computer printout giving disc material properties, bore stress data, critical crack size, crack growth rates, etc., as calculated by Westinghouse, will be submitted in the near future.
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1 Joseph M. Farley Nuclear Plant - Unit 1 Low Pressure (LP) Turbine Disc Inspection Results January 12, 1981 Page 2 The original Farley Nuclear Plant Unit 1 Rotors are being shipped to Westinghouse for refurbishment. This refurbishment will include replacement of discs 1, 2, and 3 with the Westinghouse
" Key-Plate Cesign" disc. Alabama Power Company plans to install the refurcished rotors in the Unit I turbine at the next refueling outage.
If you have any further questions, please centact Mr. William Ware (205) 250-1000 extension 3619.
Very truly yours, s 7
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_ (: fo'i.'. W~ if jfgN,F.L.Clayton,Jr.
I WW:bs Enclosure cc:
Mr. R. A. Thcmas Mr. G. F. Tr:wbridge Mr. L. L. Kintner Mr. E. A. Reeves Mr. W. H. Bradford r
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1 ALABAMA PO' DER CO. ~
FARLEY fl LO'4 PRESSURE DISC ULTRASONIC INSPECTION REPORT REPORT DATE:
1/8/81 INSPECTI0tl DATE:
11/24/80 THRU 12/10/80 l
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