ML18139A169
| ML18139A169 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 03/27/1980 |
| From: | Stallings C VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| IEB-79-17, NUDOCS 8004240509 | |
| Download: ML18139A169 (2) | |
Text
I
~
~--'---*---*--*-*._.. _. __
- ___.,._.. **. _____ -~*~~-~-- - ***-------'
e U ~::: :..; F-: C PF.(;! C* N ::
VI:RGINIA EJ.ECTRic AND PowER' :-COMPANY,;.. ',
R:r:cHHo:Nn,V:r::aorNXA 23261
- o APn I P I : 2 7 March 27, 1980 Mr. James P. O'Reiliy, Director Office of Inspection and Enforcement Region II Serial No.
283 PO/FHT:baw Docket U. S. Nuclear Regulatory Commission 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 License
Dear Mr. O'Reilly:
IE Bulletin 79-17, Revision 1, Inspection Report Surry Power Station Units 1 and 2 In response to the subject bulletin, "Pipe Cracks in Stagnant Borated Water Systems at PWR Plants," we are providing the following inspection results to supplement our earlier responses referenced below:
References
- 1.
Letter Serial No. 622A, dated August 30, 1979
- Response to bulletin items 1.a. through l.d.
- 2.
Letter Serial No. 622B, dated October 8, 1979
- Inspection deferral request pending issuance of IEB 79-17 Revision 1
- 3.
Letter Serial No. 913/102979, dated November 27, 1979
- Supplemental response concerning the definition of "stagnant" and providing schedule of proposed inspections.
- 4.
Letter Serial No. 622D, dated December 27, 1979
- Response to bulletin item 2.a., monthly visual inspection of accessible welds in affected systems.
- 5.
Letter Serial No. 085, dated February 6, 1980
- Updated report of monthly visual examinations Inspection Description of accessible welds~
Visual, liquid penetrant and ultrasonic examinations of selected welds in systems identified in reference 1 were performed in response to bulletin item 2.
In all cases, nondestructive examination personnel were qualified in accordance with SNT-TC-lA, Levels I or II, as appropriate.
The ultrasonic and associated visual examinations of full penetration butt-weids were performed by Westinghouse Nuclear Service Division, Inspection Service.
The ultrasonic examination procedure utilized was specially developed for detecting the presence of intergranular corrosion.
i 1
f,J e
e VIHOINIA ELECTRIC AND PoWEH COMPANY TO Mr. James P. O'Reilly 2
The liquid penetrant and associated visual examinations of socket and Speedline welded systems were performed by VEPCO, utilizing procedures from our Nondestructive Testing Manual.
In both groups of examinations described above, at least ten (10) percent of the welds in affected systems were inspected.
No supplemental techniques (e.g., radiography) were required.
Inspection Results No reportable indications were noted during the nondestructive examinations conducted in response to IE Bulletin 79-17, Revision 1.
A summary of the inspections performed is given here:
UNIT 1 UT and PT and UNIT 2 UT and PT*and
SUMMARY
Visual Visual Visual Visual Total Welds in Normally Accessible Systems 614 326 613 214 Number of Welds Examined 97 66 109 36 Percent of Total Welds Examined 15.8 20.2 17.8 16.8 No adverse plant conditions related to intergranular stress corrosion cracking were detected during 'the evaluations conducted as required by IE Bulletin 79-17, Revsion 1.
Accordingly, no modifications to Surry Power Station or to plant operating procedures, as a result of the bulletin, are anticipated.
If you have any questions or require additional information, please contact this office.
Very truly yours, C. M. Stallings Vice President-Power Supply and Production OperatiQns
- cc: Director, Division of Operating Reactors Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission