ML20094F533
| ML20094F533 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 07/18/1984 |
| From: | Martin T Public Service Enterprise Group |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| REF-PT21-84-388-000 PT21-84-388, PT21-84-388-000, NUDOCS 8408100085 | |
| Download: ML20094F533 (2) | |
Text
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a Thomas J, im tin Public Service Electric and' Gas Company 80 Park Plaza Newark, N.J. 07101 201/4304316 i, i Vics Pruident
, Engineering enri Consruction July 18, 1984 Dr. Thomas E. Murley, Administrator
~
U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region I 631 Park Avenue King of Prussia, Pennsylvania 19406
Dear Dr. Murley:
POTENTIAL CONSTRUCTION DEFICIENCY DEFECTS IN LUBE OIL PUMP DISCHARGE NOZZLES HOPE CREEK GENERATING STATION On April 25, 1984, a verbal report was made to Region I, Office of Inspection and Enforcement representative, Mr. E.
C. McCabe, advising of a potentially significant construction deficiency regarding cracked bosses on our diesel generator lube oil pump discharge nozzles.
On May 25, 1984, an interim', report was submitted to your office.
The following
. interim report is provided in accordance with 10CFR50.55(e).
Description c f the Deficiency Colt Industries _ submitted a Part 21 Report to Region III concerning a broken boss on a lube oil pump discharge nozzle discovered during factory testing of a diesel generating set.
A second lube oil pump'was examined and the boss area was ej found to. be cracked.
Colt. Industries concl' ded that the cracking or breaking was u
the~ result of overto~rquing of the t apered thread adapter which screwg.into the boss.
~ '
_;?
' Oud Arch'itect/ Engineer and Constructor, Bechtel, has inspected all'four of the engine driven lube oil pump discharge nozzles
/' 4n the llope Creek diesel generators.
The inspection revealed cracks and casting discrepancies at the boss connection and
, Nonconformance Report No. 3826 was issued to document and control the hardware.
-9400100005 04071G
-PDR ADOCK 05000354 S
Dr.
T.
E. Murley 2
7/18/84 Safety Analysis An evaluation was performed to determine the effect on safe operation of the plant.
The failure of the discharge nozzle significantly reduces the sealing area between the nozzle and the threaded adapter.
In addition, severe cracking or break-ing of the discharge nozzle could permit oil leakage sufficient" to prevent operation of the engine.
We, therefore, consider this condition to be reportable in accordance with 10CFR50.55(e).
Corrective Action Colt Industries concluded that the cracking or breaking was the result of overtorquing of the tapered thread adapter which screws into the boss.
Colt Industries advised that the design for the adapter is being changed to straight threads with an undercut to prevent recurrence of the problem.
Bechtel is currently coordinating with Colt Industries to provide for repair of the discharge nozzles and replacement of the threaded adapters.
A schedule for completion of all necessary corrective actions will be provided by August 7, 1984, which will be reported at that time.
Very truly yours, M
M)
C Office of Inspection and Enforcement Division of Reactor Construction Inspection Washington, D.
C.
20555 NRC Resident Inspector - Hope Creek P.
O.. Box 241 Hancocks Bridge, NJ 08038 Records Center Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, GA 30339