ML19254E259
| ML19254E259 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 10/19/1979 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Davidson D CLEVELAND ELECTRIC ILLUMINATING CO. |
| References | |
| NUDOCS 7910310390 | |
| Download: ML19254E259 (1) | |
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UNITED STATES 3,,
NUCLEAR REGULATORY COMMISSION g
REGION 111 g
r b[
799 ROOSEVELT ROAD 0,
GLEN ELLYN.1LLINOIS 60137 o
OCT 191979 Docket No. 50-440 Docket No. 50-441
{heClevelandElectricIlluminating Company ATTN:
Mr. Dalwyn R. Davidson Vice President - Engineering P. O. Box 5000 Cleveland, OH 44101 Gentlemen:
The enclosed Bulletin 79-13, Revision 2 is forwarded to you for information. No written response is required.
If you desire additional information regarding this matter, please contact this office.
Sincerely, w [4 $
-James G. Keppler Director
Enclosures:
1.
IE Bulletin No. 79-13, Revision 2 2.
Listing of IE Bulletins Issued in Last Six Months cc w/ encl:
Central Files Director, NRR/DPM Director, NRR/ DOR PDR Local PDR NSIC TIC Harold W. Kohn, Power Siting Commission Mr. Daniel D. Wilt, Attorney 1W4 076 7 910310 39 U Cf
SSINS: 6830 Accession fio.:
7908220135 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 October 16, 1979 IE Bulletin No. 79-13 Revision 2 A
CRACKING IN FEEDWATER SYSTLT /IPING Descript.on of Circumstances:
This revision to IE Bulletin No. 79-13 is based on the results of the radio-graphic examinations and ongoing investigation of the subject problem to date since the initial Bulletin was issued. The revision reduces in scope the R2 The number and extent of the piping system welds required to be examined.
requirements for reporting and action time frame remain unchanged.
Indiana and Michigan Power Company notified the NRC of On May 20, 1979, The cracking in two feedwater lines at their D. C. Cook Unit 2 facility.
cracking was discovered following a shutdown on May 19 to investigate leakage inside containment.
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 generator feedwater lines at this location on both Units 1 and 2.
a letter was sent to all PWR licensees by the Office of On May 25, 1979, Nuclear Reactor Regulation which infomed licensees of the D. C. Cook failures and requested specific information on feedwater system design, fabrication, inspection and operating histories. To further explore the generic nature cf the cracking problem, the Office of Inspection and Enforcement requested licensees of PWR plants in current outages to immediately conduct volumetric examination of certain feedwater piping welds.
As a result of these actions, several other licensees with Westinghouse steam generators reported crack indications.
Southern California Edison reported on June 5,1979, that radiographic examination revealed indications of cracking in feedwater nozzle-to pipe welds on two of three steam generators of San On June 15, 1979, Carolina Power and Light reported that Onofre Unit 1.
radiography showed crack indications in similar locations at their H. B.
Duquesne Power and Light confirmed on June 18, 1979, that Robinson Unit 2.
radiography has shown cracking in their Beaver Valley Unit 1 feedwater piping-to-vessel nozzle weld.
Public Service Electric and Gas Company reported on June 20,1979 that Salem Unit 1 also has crack indications. Wisconsin Public Service company decided on June 20, 1979 to cut out a feedwater nozzle-to pipe weld which contained questionable ind As of June 22, 1979 and since May 25, inspected the feedwater nozzle ~-to pip.
DUPLICATE DOCUMENT k
I Entire document previously NOTE:
R1 and R2 indicates lines r entered into system under:
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