ML19242A128
| ML19242A128 | |
| Person / Time | |
|---|---|
| Site: | Perry  |
| Issue date: | 07/11/1979 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Davidson D CLEVELAND ELECTRIC ILLUMINATING CO. |
| References | |
| NUDOCS 7907310325 | |
| Download: ML19242A128 (1) | |
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UNITED STATES i'
NUCLEAR REGULATORY COMMISSION O
REGION lil J
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799 ROOSEVELT ROAD y'
GLEN E LLY N. lLLINOls 60137 JUL 111979 D(.cket No. 50-440 Docket No. 50-441 The Cleveland Electric Illuminating Company AITN:
Mr. Dalwyn R. Davidson Vice President - Engineering P. O. Box 5000 Cleveland, CH 44101 Gentlemen:
The enclosed IE Bulletin No. 79-15 is forwarded to you for action.
A written response is required.
If you desire additional information regarding this matter, please contact this office.
Sincerely, d02 -
) # James G. Keppler L
Director i
Enclosures:
1.
Listing of IE Bulletins Issued in Last 12 Months cc w/ encl:
Central Files Director, NRR/DPM Director, NRR/ DOR PDR Local PDR NSIC TIC Harold W. Kohn, Power Siting Ccmmission Mr. Daniel D. Wilt, Attorney a. ~,
43)
!1A sI4 79073103c5
U.S. NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT REGION III July 11, 1979 IE Bulletin No. 79-15 DFEP DRAFT PLHP DEFICIENCIES
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Description of Circumstances-Cn October 20, 1978, Common walth T.dison Company reported that manufacturing deficiencies had been identifiec in new bigh pressure core spray, low pressure core spray, and residual heat removal pu=ps manufactured by Ingersoll-Rand (I-R)
Company, Cameron Pu=p Division.
Each of these pu=ps is a vertical turbine pump with impellers located in bowls in a sump or a self contained barrel. The motor (prime mover) is located at the hfghest pu=p elevation to take into account maximum flooding at the site
.or space considerations. The auction is at the losar end of the pu=p while c
the cischarge head is just below the driver. Bearings supporting the vertical shaft segments (usually 5 to 10 segments) are either self lubricated, force j
fed (lubricated by fluid being pumped), or oil lubricated and unintained withie their own isolated system. These pumps are designated as " Deep Draft".
Figures 1&2 show typical outlines of auch pumps.
The internal def: ciencies, identified through dimensional and visual inspections were as follows:
Low Pressure Core Spray Pu=pr (I-R Model No. 29APKD-5) (Date of Manufacture -
Feburary 1973)
Loose impeller bolts and bolts improperly staked Loose key - keyuay fit Excessive runout on pu=p shaft Bearing showed wear Bearing clearsnce exceeded recot:manded tolerance Coupling thread galled Wear ring clearance out-of-specification I=peiler-to-shaft clearance cat of specification Cracks found in second-and-third-stage impc11ers Stuffing box bushings were severely galled High Pressure Core Spray Pumps (I-R Model No. 17I20KD) (Date of Manuf.scrure -
Septe=ber 1972)
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jDUPLICATE DOCUMENT Bearing cler.rance exceeded reco= mended to Wear ring clearance out-of-specification jEntire d Bearings showeri wear f
into syste unde red n
/ 707/F 0/25
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