ML20040F740
| ML20040F740 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point, Palo Verde, Byron, Braidwood, Susquehanna, South Texas, 05000000 |
| Issue date: | 02/01/1982 |
| From: | Stolba F COOPER INDUSTRIES, INC. |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| REF-PT21-82-557-000 10CFR-050.55E, 10CFR-50.55E, PT21-82-557, PT21-82-557-000, NUDOCS 8202100242 | |
| Download: ML20040F740 (3) | |
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February 1, 1982 m[gu $ "" [
ms Office of inspection and Enforcement
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Nuclear Regulatory Commission N
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.C.
20555 Attention: Director of Inspection and Enforcement Gentlemen:
In accordance with 10CFR Part 21, this letter is no ti fica t io n of a deficiency that has been_ determined to exist in emergency standby diesel generator sets manufactured and suppiled by Cooper Energy Services. The affected units are as follows:
Four sets at Pennsylvania Power and Light Company's Susquehanna Steam Electric Station at Berwick, Pa.
Four sets at Commonwealth Edison's Byron Station Units 1 and 2. In Byron, Illinois.
Four sets at Commonwealth Edison's Braidwood Statio n Units I and 2 in Braidwood, Illinois.
Six sets at Arizona Public Service's Palo Verde Nuclear Generating Station in Palo Verde, Arizona.
Two sets at Niagara-Mohawk's Nine Mile Point Nuclear Station, Unit'2, in Scriba, New York.
One set already shipped to Houston Light and Power's South Texas Project, Nuclear Power' Plant's I and 2.
There are five additional units remaining to be shipped on this order.
The defect exists in the strainer basket located in the lube oil strainer manufactured by Zurn Industries, Inc. After performance testing at Cooper Energy Services, it was found that the mesh strainer basket liner was torn loose at the top of the basket where the perforated sidewall and the liner were sandwiched between two flanges. The tear propogates in an axial direction.
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This problem was originally discovered in December of 1980, but based upon information available at that time, was deemed not reportable under the provisions of 10CFR Part 21, 3
since a failure of this type would not prevent the generator unit from performing its designated function in a safe manner.
However, based upon recent testing conducted at our Grove City plant, it is now apparent that the strainer mesh disintegrates after it tears, and would then be capable of passing through the engine bearings. If this were to occur, a bearing failure j
would be probable and the unit would be incapable of performing.
The baskets in the four units at Pennsylvania Power and. Light's Susquehanna Steam Electric Station have already been replaced with new baskets of an improved design manufactured for Zurn by Michigan Dynamics. These baskets were examined after performance of a 300 start test at the site, and no deterioration of the mesh was observed.
A new basket design, different from the Michigan Dynamics basket, has just been qualified by test in Grove City and will be provided as a replacement for units at the remaining locations listed above. Replacement of all remaining baskets should be completed within the next six months.
Sincerely, I
Y l
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,s F.
B.
Stolba Vice President & General Manager, Reciprocating Products cc:
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Bemiller H.
F..Curren i
G.
A.
Dorton l
H.
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Gardner M.
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Helmich T.
W.
Kearns R.
A.
Miklos R.
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Wells Per Attached Copy Distribution i
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COOPER ENERGY SERVICES AJAX COOPER BISSEMER PENN PUMP SUPERIOR i
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Poser, Project Engineer Bechtel Power Corpora tio n P.O.
Box 3965 San Francisco, CA. 94119 C.
Turnbow, Field Construction Manager Bechtel Power Corporation P.O.
Box 384 Berwick, Pa. 18603 F.
G.
GOGLIOTTI Sargent & Lundy Engineers 55 East Monroe St Chicago, Ill. 60603 Dick Tuetkin Commonwealth Edison Co.
Byron Nuclear Station P.O.
Box B Byron, 111.
61010 John Merwin Commonwealth Edison Co.
Braidwood Nuclear Station RR #1, Box 81 Braceville, 111. 60407 W.
G.
Bingham', Project Engineer Bechtel Power Corporation P.O.
Box 60860 Terminal Annex Los Angeles, CA. 90060 W.
J.
Stubblefield, Field Construction Manager Palo Verde Nuclear Generating Station P.O.
Box 49 Palo Verde, AZ 85343 K.
N.
Khanna Stone & Webster Engineering Corp.
Cherry Hill O p e ra t l~o n s Center Three Executive Campus P.O.
Box 5200 Cherry Hill, N.J.
08034 J.
L.
Hawks P.O.
Box 3 Houston, Texas. 77001 A.W.
Smith, QA Manager Brown & Root South Texas Project Bay City, Texas. 77414 i
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