ML19250C151
| ML19250C151 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 10/17/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Arnold R METROPOLITAN EDISON CO. |
| References | |
| NUDOCS 7911080354 | |
| Download: ML19250C151 (1) | |
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UNITED STATES
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631 PARK AVENUE f
KING OF PRUSSIA, PENNSYLVANIA 19406 October 17, 1979 Docket Nos. 50-289 50-320 Metropolitan Edison Company ATTN: Mr. R. C. Arnold, Sr.
Vice President 260 Cherry Hill Road Parsippany, New Jersey 07054 Gentlemen:
The enclosed IE Bulletin 79-13, Revision 2, is fenvarded to you for information.
No written response is required.
If you desire additional information regarding this matter, please contact this office.
Sincerely, WA oyce
. Grier
/" Director
Enclosures:
1.
IE Bulletin No. 79-13 w/ Attachments 2.
Listing of IE Bulletins Issued in Last 6 Months cc w/encls:
J. G. Herbein, Vice President Nuclear Operations E. G. Wallace, Licensing Manager G. P. Miller, Manager Support Services and Logistics J. L. Seelinger, Superintendent Unit 1 J. B. Logan, Superintendent Unit 2 W. E. Potts, Unit 1 Superintendent - Technical Support G. A. Kunder, Unit 2 Superintendent - Technical Support J. J. Colitz, Manager Plant Engineering I. R. Finfrock, Jr.
R. W. Conrad G. F. Trowbridge, Esquire J. B. Lieberman, Esquire Ms. Mary V. Southard, Chairperson, Citizens for a Safe Environment CONTACT:
L. E. Tripp 337-5282
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ENCLOSURE 1 SSINS:
6830 Accession iio.:
7908220135 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 October 17, 1979 IE Bulletin No. 79-13 P.evision 2 Page 1 of 5 CRACKING I? FEEDWATER SYSTEM PIPING Description of Circumstan::es:
This revision to IE Bulletin No. 79-13 is based on the results of the radiographic examinations and ongoing investigation of the subject problem to date since the initial Bulletin was issued. The revision reduces in scope the number and R2 extent of the piping system welds required to be examined.
The requirements for reporting and action time frame remain unchanged.
On May 20, 1979, Indiana and Michigan Power Company notified the NRC of cracking in two feedwater lines at their D. C. Cook Unit 2 facility. The cracking was discovered following a shutdown on May 19 to investigate leakage inside contain-ment.
Leaking circumferential cracks were identified in the 16-inch feedwater elbows adjacent to two steam generator nozzle elbow welds. Subsequent radiographic examination revealed crack indications in all eight steam ger.erator feedwater linas at this location on both Units 1 and 2.
t a letter was sent to all PWR licensees by the Office of Nuclear
' o ir E '
.n which informed licensees of the D. C. Cook failures and
.nuested.
Ji-information on feedwater system design, fabrication, inspec-
- ar d e
m sistories. To further explore the generic nature of the e
1, d
.1e Office of Inspection and Enforcement requested licensees a
ila: 3 arrent outages to immediately conduct volumetric examination
'acc..a c.er piping welds.
- m. sf these actions, several other licensees with Westinghouse steam s t eported u ack indications.
Southern California Edison reported on tue<
1979, that radiographic examination revealed indications of cracking in
'dwater i.ozzle-to-pipe welds on two of three steam generators of San Onofre e,it 1.
On Junc 15, 1979, Carolina Power and Light reported that radiography
" owed crack ind: cations in similar locations at their H. B. Robinson Unit 2.
< aesne Power eN Light confirmed on June 18, 1979, that radiography has shown
ublic Service Eiactric and Gas Compa
'"aa on to7o that Salem
!qit I also har crack indications. W June 20, 1979 to cut out a feedwater ele indication, for metallurgical ex aay 25, 1979 reven other PWR faciliti DUPLICATE DOCUMENT pipe welds wi Mout finding cracking i Entire document previously NOTE:
R1 and R2 indicat7s lines revi entered into system under:
79Of220llf ANO 1775 106
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No. of pages:
J.