ML18116A226
| ML18116A226 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 05/31/1979 |
| From: | Stallings C VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-79-129-000 NUDOCS 7907310276 | |
| Download: ML18116A226 (2) | |
Text
....
- e 79-lcJ9-ooo e
VIRGINIA ELECTRIC AND PowER CoM:PANY
- RICHMOND,V:r:RGINXA. 23261 May 31, 1979 Mr. James P. O'Reilly, Director Office of Inspection and Enforcement U. S_. Nuclear Regulatory Commission Region II Serial No. 423
- PO/FHT:baw Docket No.: 50~281 License No.: DPR-37 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
Under the provisions of the operating license Technical Specfications and/or 10CFR21, NRC Region II was notified on May 25, 1979, that a potential signi-ficant deficiency or substantial safety hazard existed at Surry Power Station Unit No
- Two *.
In accordance with the reporting requirements of the above regulations, the following information is submitted:
A.
B
- Name and address of reporting individual:
C. M. Sta.11~:ngs Virginia.Electric and Power Company P. o. Box 26666 Richmond, Virginia 23261 Facility, activity, and/or component affected:
. The report is from Surry Power Station, Unit No. 2 as part of the Steam Generator Replacement Project.
The affected component is the.lower shell of Steam Generator No. 2973.
C.
NaE: of firm supplying the component, activity, or service:
The component is supplied by Westinghouse Electric Corporation, Tampa, Fl.
D.
Description of defect, deficiency, or failure to comply:
Bolt hole No. 4 on Pad No. 19D of Steam Generator No. 2973 was discovered to have approximately one half to three quarters of an inch of thread missing.
The helicoil was inserted in the bolt hole and the missing threads were not*.
detected d~ring receipt inspection.
Some proble~s were encountered in the fitting and the helicoil was removed and the problem detected.
This p~o-blem could have resulted in less than required thread.engagement.
E.
Date of Determination of Reportability:
. May 25, 1979
,,'II VrRGlXI.-\\ ELECTRIC AND POWER CoMPA:\\-Y TO'
~
Mr. James P. O'Reilly 2
F.
Similar components, activities, or services:
This potential deficiency could be present in the Westinghouse Series 51 Steam Generators, which have been or will be shipped to Vepco (Generator Nos. 2971, 2972, 2973, and 2961 have been shipped).*
G.
Corrective action which has been, or is being, or wil_l be taken, the individual responsible and the length of time to complete ~he a~tion.
All helicoils of ~he steam generator feet were removed and new helicoils installed.
The affected bolt hole will be fitted using a special long bolt (9 1/ 4!') to ensure the required thread engagement.
An inspection of helicoils on the two remaining steam generators is underway to ensure that the thread engagement requirement can be met.
Investigation by Vepco and Westinghouse personnel is continuing.
Any additional information such as identification of additional corrective action will be submitted as a supplement to this report.
Should you require further information, please contact this office.
Very truly yours,
~ )1Y7
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.{£,;, 1,* j* t,*><JI aC~~
C. M. Stallings Vice President-Power Supply
- and Production Operations cc: Director - Office of Inspection and Enforcement (3)