ML19256C949
| ML19256C949 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 07/05/1979 |
| From: | Bryan S, Klinger G, Nolan F NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PNO-79-218, NUDOCS 7910150777 | |
| Download: ML19256C949 (2) | |
Text
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PRELIMINARY NOTIFICATION July 5, 1979 PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO-79-218 This preliminary notification constitutes EARLY notice of an event of POSSIBLE safety or public interest significance.
The information presented is as initially received without verification or evaluation and is basically all that is known by IE staff on this date.
FACILITY:
Virginia Electric and Power Company Surry, Unit No. 2 Docket No. 50-281 Surry, Virginia INDICATION OF CRA'KS IN FEEDWATER N0ZZLE/ REDUCER WELD AREAS
SUBJECT:
C 8ecause of feedwater system cracks found previously in Unit No. 1 (PNO-79-189),
and the requirements of NRC Bulletin 79-13, radiographs were made of Unit 2 feedwater reducer-to-nozzle welds and feedwater reducer-to pipe welds.
The radiographs of the feedwater reducer-to-nozzle welds on A and 8 steam generators indicate inside surface cracks in the heat-affected zone on the reducer side of the welds.
In both cases, the cracks affect 180 degrees of the circumference.
These cracks are similar to those found earlier on Unit No. 1.
The radiographs of the feedwater reducer-to pipe welds on A and B steam genert. tors showed no indication of cracks.
The radiographs of C steam generator feedwater reducer-to-nozzle weld did not indicate cracks but did indicate slag, porosity and incomplete fusion rejectable under the current code.
The radiographs of C steam generator feedwater reducer-to pipe weld indicated a crack in the weld root ext.ending over 60 degrees of the circumference.
Unit No. 2 is presently shut down undergoing steam generator replacement.
Because of the cracks found in Unit No.1 earlier, replacement material is on-site and repairs will be made in conjunction with Unit No. 1 repairs.
Media interest is not anticipated at this time.
Neither the licensee nor the NRC plan a news release.
The Commonwealth of Virginia has been notified.
Regional II (Atlanta) received notification of this occurrence by telephone from the licensee at 3:30 p.m. on July 3.
This information is current as of 8:45 a.m.
on July 5.
Contact:
G. Klingler IE, x28019 F. Nolan IE, x28019 S. Bryan IE, x28019 CONTINUED (o777 g9101 J
PNO-79-218 Continued 7/5/79 Distribution:
Transmitted H St Chairman Hendrie Commissioner Bradford S. J. Chilk, SECY Commissioner Kennedy Commissioner Ahearne C. C. Kammerer, CA Commissioner Gilinsky ACRS (For Distribution) y'VC Transmitted:
MNBB P. Bldg M -
V. Stello, IE L. V. Gossick, EDO H. R. Denton, NRR Region L H. L. Ornstein, E00 R. C. DeYoung, NRR J. J. Fouchard, PA R. J. Mattson, NRR N. M. Haller, MPA D. Vassallo, NRR (MAIL J I ~)Cummings, OIA R. G. Ryan, OSP D. Eisenhut, NRR H. K. Shapar, ELD SS Bldg R. Minogue, SD W. J. Dircks, NMSS
, S. Levine, RES
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