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. |
| 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 | |
Nak Engineering Inc with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation | |
WEEKMONTHYEARENS 410112004-09-02T15:38:0002 September 2004 15:38:00
[Table view]10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation Part 21 Reporting: History of Emergency Diesel Generator Piston Defect 2004-09-02T15:38:00 | |