ML19247A349
| ML19247A349 | |
| Person / Time | |
|---|---|
| Site: | Catawba, Perkins, Cherokee  |
| Issue date: | 06/25/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Parker W DUKE POWER CO. |
| References | |
| NUDOCS 7907310012 | |
| Download: ML19247A349 (2) | |
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'c, UNITED ST ATES I ')
NUCLE AR REGUL ATORY COMMISSION i
REGION 11 I
101 M ARIE T T A si N VW Sulf E 3100
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ATLANTA GE ORGI A 30303
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JUN 2 51979 In Reply Refer To:
R11:JP0 50-413, 50-414 50-491,. 50-492 50-493, 50-488
<$0-489, 50-490 Duke Power Cocpany ATTN k'. O. Parker, Jr.
Vice President, Steam Production P.
O. Box 33189 Charlotte, NC 28242 Gentlemen:
Int on:losed bulletin 79-13 is forwarded tt you ter infor ation-No wr::ter respense is required.
If you desire additiona'. infor ation regarding thie
- .a t t u, please contact this offico.
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D. G. Bese, Project Manager Post Offace Box 223 29710 Clover, South Carolios J. T. Moore, Project Manager Office Box 422 29340 Post g ggocy, South Carolina I
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Ulf1TED STATE 5 WUCLEAR RICULATDRT CCHil5510M OF71CE OF INSPECTION AND ENTORCDGNT WASHINCTON, D.C.
2C555 June 25.1979 IE Sulletin No. 79-13 CRACKINC IN FIEDWATER SYSTDi FIFING Description of Circumstances:
Indiana and 7tichigan Power Company totified the NRC of On m y 20, 1979, 2 f acility.
The cracking in two feedvater lines at their D. C. Cook Unit cracking was discovered following a shutdovn on my 19 to tavestigste leakage Leaking circumf erential cracks were identified in the inside containment.
to two s t e en g en e r a t or nos sl e elbov we ld s.
16-inch f eedwater elbovis adjacent Subsequent radiographic examinatfor. revealed crack indications in all eight steam generator feedvster lines at this location on both Units I and 2.
a letter was sent to all IVR licensees by the Of fice of On N y 25, 1979, Nuclear Reactor Regulation which inf ormed licensees of the D. C. Cook failures design, f abrication, and requested specific information on feedvster systestTo furth r emplore the generic na inspection sad ope rating histories.
the cracking probles, the of fice of Inspection end Enf orcenent requested licensees of TVR plants in current outages to troediately conduct volumetric amerination of certain f eedwater piping velds.
As a result of these actions, several other licenaces with Westirthouse stems Southern Calif ornia Edisen reported on generators reported crack indications. radiographic e.xaminatico revealed indica June 5, 1
', that
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in feedvater nostle-to-piping velds on two of three stear generators of I.
On June 15, 1979, Carolina Power arw' Light repor ted that San onofre Unit their H. 3. Robinson radiography shesed crack indications in stallar locattims at 18, 1979, that radiography Duquesne Power and Light confirsed on June has shown cracking in their Beaver Yalley Unit I f eedvater piping to vessel Unit 2.
Public Service Electric and Cas Company reported on Juae 20 norsle veld.
Wisconsin Public Service 1979 that Salem Unit I also has crack indications.to cut out a feeduster nortle-to-pipe company decided on June 20, 1979 As of which contained guestionable indication, for estallurgical examination.seven June 22, 1979 and sinee m y 25, 1979 the feedwater nogale-to-pipe welds without flodLa cracking indications.
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The feedwater nossie-to-pipe config" shown on the attached figures I and _ jDUPLICATE DOCUMENT joint detail showing the principal c ] Entire document previously entered
- l are shown en the attathed figure 3.
11nto system under:
Ce ftarch 17, 1977, during hest-up f
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ANO Unit I, a leak was discovered la th the 16-inch if aseter feedwater pipi No. of pages:
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asedestructive esasiastfee of all a d
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