ENS 41011

v t e ENS Event
15:38 Sep 2, 2004
Title	Part 21 Reporting: History of Emergency Diesel Generator Piston Defect
Event Description	The Nordberg single piece, ductile iron piston, a component of the Nordberg Diesel Engine (Model FS 1316HSC) Emergency Diesel Generator, has a history of sub-surface porosity problems in the upper ring belt area. This porosity has resulted in the initiation of cracks in the compression ring grooves and ultimately the separation of the piston crown from the piston skirt. Once the crown comes loose from the skirt, it can result in catastrophic damage to the cylinder head, cylinder liner, cylinder bock, connecting rod, and crankshaft. This damage can result in the loss of the safety function of the emergency diesel generator. The plant affected is owned by Progress Energy, Brunswick Nuclear Project (CP&L), Brunswick, NC. The component serial number is 1030-1328/1331, model FS 1316HSC. The manufacturer has described in details the concerns, conclusions and corrective action recommendations made regarding the current pistons in use at the facility.

ENS 41011 +/-
Where
Nak Engineering Inc Windsor, California (NRC Region 4)
Organization:	Nak Engineering Inc
Reporting

10 CFR 21.21
Time - Person (Reporting Time:+-3.28 h-0.137 days <br />-0.0195 weeks <br />-0.00449 months <br />)
Opened:	Andrew M. Katzin 12:21 Sep 2, 2004
NRC Officer:	Arlon Costa
Last Updated:	Sep 2, 2004
41011 - NRC Website
v • d • e

v t e Emergency Notification System
Nak Engineering Inc with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation
WEEKMONTHYEAR2004-09-02T15:38:00 [Table view]
[ENS list for Nak Engineering Inc]

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