ML19242A150
| ML19242A150 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 07/11/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Nichols T SOUTH CAROLINA ELECTRIC & GAS CO. |
| References | |
| NUDOCS 7907310385 | |
| Download: ML19242A150 (2) | |
Text
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NUCLEAR REGULATORY COMMISSION 7' (
REGION 11 f
101 MARIE TT A ST., N W. SUIT E 3100 e
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AT LANT A, GEORGI A 30303 In Reply Refer To:
RII:JPO 50-395 South Carolina Electric and Gas Company ATTN:
T. C. Nichols, Jr., Vice President Power Production and Systems Operations P. O. Box 764 Columbia, 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,
' Nh:W n
k James P. O'Reilly Director
Enclosures:
1.~
Listing of IE Bulletins Issued in Last 12 Months 7907310385 4
/
South Carolina Electric and Gas Company cc w/ encl:
T. B. Conners, Jr.
Conners, Moore and Corber 1747 Pennsylvania Avenue, N.W.
Washington, D.C.
20006 A. A. Leith Quality Assurance Post Office Box 8 Jenkinsville, South Carolina 290(5 O. S. Bradham, Manager Nuclear Operations Post Office Box 8 Jenkinsville, South Carolina 29065 3
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UNITED STATES NUCI. EAR REGUI.ATORY COMMISSIOh OFFICE OF INSPECTION AND EhTORCDENT
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WASHINGTON, D.C.
20555 July 11, 1979
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DEEP DRAFT PUMP DEFICIENCIES Description of Circu= stances:
Coc=onwealth Edison Co=pany reported that manuf acturing On October 20, 1978, deficiencies had been identified in new high pressure core spray, low pressure re= oval pu=ps manuf actured by Ingersoll-Rand (I-R) core spray, and residual heat Co=pany, Ca=eron Pu=p Division.
Each of these pumps is a vertical turbine pu=p with impellers located in bowls The motor (prime mover) is located at in a su=p or a self contained barrel.
the highest pu=p elevation to take into account maximu= flooding at the site The suction le at the lover end of the pcp while or space considerations.
Bearings supporting the vertical the discharge head is just below the driver.
shaf t segments (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=.
lii2 show typical outlines of such pu=ps.
identified through dimensional and visual inspections The internal deficiencies, were as follows:
Iow Pressure Core Spray Pu=ps (I-R Model No. 29APKD-5) (Date of Manuf acture -
Feburary 1973)
Loose impeller bolts and bolts improperly staked Loose key - keyvay fit Excessive runout on pu=p shaft Bearing shoved wear Bear 4ng clearance exceeded recocuended tolerance Coupling thread galled Vear ring clearance out-of-specification Impeller-to-shaft clearance out of specification Cracks found in second-and-thi d-stage impellers EA dup Stuffing box bushings were se' T
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Bigh Pressure Core Spray Pu=ps (
, Entire document September 1972)
( int, system under:revious1Y entered 4)g l
Bearing clearance exceeded r 0
/25 g
Vear ring clearance out-of-s c u arimas. w ed vast y,*
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