ML19242A151
| ML19242A151 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 07/11/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Mary Johnson SOUTH CAROLINA ELECTRIC & GAS CO. |
| References | |
| NUDOCS 7907310386 | |
| Download: ML19242A151 (2) | |
Text
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4 p2RIGu UNITED STATES
'o, NUCLEAR REGULATORY COMMISSION
., (f' 7,
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REGION 11 p%
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101 MARIETT A ST., N W, SUITS 3100 o, -
AT L AP.T A, GEORGI A 30303
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In Reply Refer To:
JUL 1319b RII:JP0 50-395 South Jarolina iectric ar.d Gas Company ATTN:
M. C. Johnson, Vice President Special Services and Pureilasing P. O. Box 764 Colu=bia, SC 29218 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,
~Qh>
n kg James P. O'Reilly Director
Enclosures:
1.
IE Bullet!.n No. 79-15 2.
Listing of IE Bulletins Issued in Last 12 Months 790733oggg is y
r:a
i South Carolina Electric and Gas Company cc w/ encl:
T. B. Conners, Jr.
Conners, Moore and Corber 1747 Pennsylvania Avenue, N W.
Waubington, D.C.
20006 A. A. Smith Quality Assurance Post Office Sox 8 Jenkinsville, Soutn Carolina 290tS
- 0. S. Bradham, Manager Nuclear Operations Post Office Box 8 Jenkinsv211e, South Carolina 29065 9
/ !:.r.
f UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND EhTORCEMEh"I WASHINGTON, D.C.
20555 July 11, 1979 IE Bulletin No. 79-15 DEEP DRAFI PUMP DEFICIENCIES Description of Circu= stances:
Co==onwealth Edison Co=pany reported that manufacturing On October 20, 1978, deficiencies had been identified in new high pressure core spray, low pressure core spray, and residual heat re= oval pumps manufactured by Ingersoll-Rand (
Co=pany, Cameron Pu=p Division.
Each of these pu=ps is a vertical turbine pu=p with i=pellers located in bowls The motor (pri=e mover) is located at in a su=p or a self contained barrel.
pu=p elevation to take into account maximu= flooding at the site The suction is at the lover end of the pu=p while the highest or space considerations.
Bearings supporting the vertical the discharge head is just below the driver.
shaft seg=ents (usually 5 to 10 segments) are either self lubricated, force fed (lubricated by fluid being pu= ped), or oil lubricated and maintained within These pu=ps are designated as " Deep Draft".
Figures their own isolated syste=.
11,2 show typical outlines of such pu=ps.
The internal deficiencies, identified through dimensional and visual inspections were as follows:
lov Pr essure Core Spray Pumps (I-R Model No. 29APKD-5) (Date of Manufacture -
Feburary 1973)
Loose impeller bolts and bolts i= properly staked Loose key - keyvsy fit Excessive runout cn pu=p shaft Bearing showed wear Bearing clearance exceeded recoc= ended tolerance Coupling thread galled Wear ring clearance out-of-specification I=peller-to-shaft clearance out of specification Cracks found in second-and-third-stage impellers Stuffing box bushings were severe ogpg7C
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Bigh Pressure Core Spray Pumps (1-R Entir a
Septe=ber 1972)
"intO cument i
System under. Previous 3Y entered 4
Bearing clearance exceeded recot 0
h y
Wear ring clearance out-of-spec y Bearings showed waar q
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