ML19225C352
| ML19225C352 | |
| Person / Time | |
|---|---|
| Site: | 05000516, 05000517, Shoreham File:Long Island Lighting Company icon.png |
| Issue date: | 07/11/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Wofford A LONG ISLAND LIGHTING CO. |
| References | |
| NUDOCS 7907270337 | |
| Download: ML19225C352 (1) | |
Text
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o, UN. ~ED STATES T2
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,y f3 e ( (,g NUCLEAR REGULATORY COMMISSION 3.j',K f/ ;. j REGION I O, ' l ~,,
4 631 PARK AVENtJE k, ' V
,e KING OF PRUSSIA, PENNS' '.VANIA 19406 July 11, 1979 Docket Nos. 50-322 Su-516 50-517
' ong Island Lighting Company ATTN:
Mr. Andrew W. Wofford Vice President 175 East Old Country Road Hicksville, New York 11801 Gentlemen:
The enclosed 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, s
~
_Boyce H. Grier Director
Enclosures:
1.
IE Bulletin No. 79-15 w/ Attachments 2.
Listing of IE Bulletins Issued in Last Twelve Months cc w/encls:
J. P. Novarro, Project Manager Edward M. Carrett, Esquire Edward J. Walsh, Esquire T. F. Gerecke, Manager, Engineering QA Department
$27 4/
7907270 3 3 )
ENCLOSURE 1 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 IE Bulletin No. 79-15 Date:
July 11, 1979 Page 1 of 3 DEEP DRAFT PUMP DEFICIENCIES Description of Circumstances:
On October 20, 1978, Commonwealth Ediscn 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 impeltars located in bowls in a sump or a self contained barrel.
fhe motor (prime mt'er) is located at the highest pump elevation to take into account maximum fl ding at the site or space considerations.
The suction is at the lower end o 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 pumped), or oil lubricated and maintained within their own isolated system.
These pumps are designated as " Deep Draft".
Figures 1&2 show typical outlines of such pumps.
The internal deficiencies, identified through dimensional and visual inspections were as follcws:
' ow Pr^ssure Core Spray Pumps (I-R Model No. 29APKD-5) (Date of Manufacture -
Febura y 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 HighPressureCoreSprayPumps(I-RModej --
2 4 & ' ",.mfar.ture.._
!DUPLICATEDOCUMEN September 1972)
L J
e Bearing clearance exceeded recommendi Entire d P ev Wear ring clearance out-of-specifica 1.
Bearings showed wear b= into system under-usly entered
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