ML19323E749
| ML19323E749 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 05/12/1980 |
| From: | Younglbood B Office of Nuclear Reactor Regulation |
| To: | Parker W DUKE POWER CO. |
| References | |
| NUDOCS 8005270189 | |
| Download: ML19323E749 (2) | |
Text
ns DISTRIBUTION:
DOCKET FILES M. Ernst L-TERA R. Denise LB#1 Reading R. Hartfield, MPA NRR Reading OELD MAY l 2 O NRC PDR IE (3)
LPDR D. Crutchfield R. Boyd V. Stello Docket Nos.: 50-389
D. Ross
B. Grimes and 50-370
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'D.' Vassallo R. M. Gamble F. J. Williams Mr. William 0. Parker, Jr.
B. J. Youngblood Vice President, Steam Production
'R. A.* Birkel M. Rus~hbrook'
. Duke Power Company R. Mattson P. O. Box 2178.
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' ' 5.' Hana'u~er 422 South Church Street-Charlotte, North Carolina 28242' 'J ' Knight *
R; Tedesco l
Dear Mr. Parker:
R. DeYoung V. Moore
SUBJECT:
UNDERCLAD CRACKING IN REACTOR VESSEL N0ZZLES _.
(McGUIRE NUCLEAR STATION, UNITS.1. AND 2).
Recently Sequoyah 1, Watts Bar' 2,.3alem 2,. add. North Anna 1 performed augmented
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ultrasonic inspections of their reactor vessel. nozzles..These examinations were conducted (1) to determine, if, underc)ad, cracks, resul. ting front.certain-.,
pre-and post-clad heat treatments.used.by.some. European fabricators, were present in the noizles, and (2) to..demonstrata.that cladd.ing heat treatmen.ts used in the United States did not result. in,the. type of underclad cracks recently found by a European fabricator....The.results. from.the ultrasonic examinations, however, did not. indi.cate an. explicit correlation between observed cracking and pre-and post-c)ad, heat..trea.tmen.t.
To better define the potential for. cracking. in reactor vessel. nozzles,. we request that you provide us with the, following.infonnetjon_regarding e.ach of the. McGuire reactor vessels:
Nozzle base metal material, specjficatjop. type.and grade.,
Clad process type, electrode gjze and.punber,of clad layers Heat input (amps, volts. speed), f r, each clad. layer..
9 Clad pre-and post-heat,tamperature and interpass. tempera.ture for each clad layer.
Vessel stress relief treatment.............................
. Manufacturer or subcontractor.who fpbricated. vessel.and applied nozzle
. cladding.,
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We request that this information be,provided no.later. than June,6,1980.
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Sincerely.
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Mr. W. L. Porter David Flesichaker, Esq.
Duke Power Company 1735 Eye Street, N. W.
P. O. Box 2178 Suite 709 422 South Church Street
'.'ashington, D. C. 20006 Charlotte, North Carolina 28242 Richard P. Wilson, Esq.
Mr. R. S. Howard Assistant Attorney General Power Systems Division State of South Carolina Westinghouse Electric Corporation 2600 Bull Street P. O. Bcx 355 Columbia, South Carolina 29201 Pittsburgh, Pennsylvania 15230 Mr. E. J. Keith EDS "uclear Incorporated 220 Montgomery Street San Francisco, California 94104 Mr. J. E. Houghtaling NUS Corporation 2535 Countryside Boulevard Clearwater, Florida 33515 Mr. Jesse L. Riley, President The Carolina Environmental Study Group 854 Henley Place Charlotte, North Carolina 28207 J. Michael McGarry, III, Esq.
Debevoise & Liberman 1200 Seventeenth Street, N.W.
Washington, D. C.
20036 Robert M. Lazo, Esq., Chairman itomic Safety and Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Dr. Emmeth A. Leubke Atomic Safety and Licensing Board U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Dr. - Cadet H. Hand, Jr., Director Bodega Marine Lab of California P. O. Box 247 Bodega Bay, California 94923 t
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