ML19225A257
| ML19225A257 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 07/11/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| References | |
| NUDOCS 7907180699 | |
| Download: ML19225A257 (1) | |
Text
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UNITED ITATEs 4
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'o NUCLEAR HEGULATORY COMMISSION
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REGION V c
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S 19w N. CAU F OHNI A BOULEVARD sc:TE 202 WALNUr CREEK PL AZA
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wat No1 Cn s e x. Catir oHNin o.:sas July 11, 1979 Docket Nos. 50-528 50-529 50-530 Arizona Public Servi a Company P. O. Box 21666 Phoenix, Arizonc 53',35 Attention:
Mr. I. E. V:n Brunt, Jr.
Vice resic=nt, Construction Projects Gen tl eme n.
The enclosed :E ;;ile tir 10. 79-15 is fcwarded to you for action. A written respa::se is re;uired.
If you desire dcitional information regarding this ratter, please contact this office.
Sincerely,
[a'fi 5. g < d _
R. H. Engelken Director
Enclosures:
1.
IE Bulletin.t.
78-15 2.
List of IE Bulletins issued in Last 12 Months cc w/ enclosures:
F. W. Hartley, APS 1
7907180 Sit 7907180699 7.7 J4
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Ui1ITED STATES I;UCLEAR REGULATORY COMMISS10ii 0FFICE OF IriSPECTI0il AliD EliFORCEMEllT WASHII;GToti, D.C.
20555 July 11,1979 IE Bulletin i;o. 79-15 DEEP DRAFT PUMP DEFICIEi4CIES Description of Circumstances:
On October 20, 1978, Comr:onwealth Edison Company reported that manufacturing deficiencies had been identified in new high pressure core spray, low pressure core spray, and residual heat removal pumps manufactured by Ingersoll-Rand (I-R)
Company, Cameron Pump Division.
Each of these pumps is a vertical turbine pump with impellers located in bowls in a sump or a self contained barrel.
The motor (priae mover) is located at the highest pump elevation to take into account maximum flooding at the site or space considerations.
The suction is at the lower end of the pump while the discharge head is just below the driver.
Bearings supporting the vertical shaft segments (usually 5 to 10 segments) are either self lubricated, force fed (lubricated by fluid being p' aped), or oil lubricated and maintained with'n their own isolated system.
These pumps are designated as " Deep Draft".
Fi gure.s 1&2 show typical cutlines of such pumps.
Tne internal deficiencies, identified through dimensional and visual inspections were as follows:
Low Pressure Core Spray Pumps (I-R Model !!o. 29APKD-5) ( ate of Manufactur e -
Feburary 1973)
Loose impeller bolts and bolts improperly staked Loose key - keyway fit Excessive runout on pump shaft Bearing showed wear Bearing clearance exceeded recommended tolerance Coupling thread galled Wear ring clearance out-of-specification Impeller-to-shaft clearance out of specification Cracks found in second-and-third-stage impellers Stuffing box bushings were severely galled High Pressure Core Spray Pumps (I-R Model ilo.12X20KD) (Date of Manufacture -
September 1972) e Bearing clearance exceeded recona
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Wear ring clearance out-of-spec 1, DUPLICATE DOCUMENT Bearings showed wear iEntire document previously entered jinto system under:
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No. of pages:
347 937 co
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