ML040500244
| ML040500244 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 02/16/2004 |
| From: | Collins T Fairbanks Morse Engine |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| Download: ML040500244 (2) | |
Text
0211612004 U.S. Nuclear Regulatory Commission OperationsCenterEvent Report Pare II General Information or Other (PAR) Event# 40524 Rep Org: FAIRBANKS MORSE ENGINE Notification Date I Time: 02/16/2004 14:57 (EST)
Supplier: FAIRBANKS MORSE ENGINE Event Date I Time: 02/16/2004 (CST)
Last Modification: 02/16/2004 Region: 3 Docket #:
City: BELOIT Agreement State: Yes County: License #:
State: WI NRC Notified by: TODD COLLINS (FAX) Notifications: MARK LESSER R2 HQ Ops Officer: ARLON COSTA TERRY REIS NRR Emergency Class: NON EMERGENCY 10 CFR Section:
21.21 UNSPECIFIED PARAGRAPH PART 21.21 NOTIFICATION OF POTENTIAL SAFETY HAZARD ASSOCIATED WITH USE OF TURBOCHARGER "On February 12, 2004, Fairbanks Morse Engine evaluation determined a potential safety hazard associated with the use of ABB turbocharger model VTC-304 on OP engines only.
"Torsional resonance has been found in the rotating assembly which is excited by exhaust pulses. The resonance manifests itself as either a bent or broken shaft, slipped compressor wheel, cracked compressor wheel or complete rupture of the compressor set. Once failure occurs, engine power cannot be sustained.
"This condition is corrected by machining the rotating assembly to tune the natural frequency away from operating conditions.
- 'The only affected site is Crystal River 3. (6) turbos have been shipped to this site. None of the turbos have been installed and all are in storage. The FM parts department will arrange to have the turbos returned to the factory to have the necessary machining performed."
- 02/1612004 ON 14:50 FAX FAIRBANKS MORSE PURCH la 001/001 FAIRBANKS MORSE 701 White Avenue Belolt, Wisconsin 53511 Tel: 608.384.8424 Fax: 608.364.8417 Ted.stevenson(fairbanksmorse.corn February 16, 2004 Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555
Subject:
ABB Turbocharger Model VTC-304 On February 12, 2004, Fairbanks Morse Engine evaluation determined a potential safety hazard associated with the use of ABB turbocharger model VTC-304 on OP engines only.
Torsional resonance has been found in the rotating assembly which is excited by exhaust pulses. The resonance manifests itself as either a bent or broken shaft, slipped compressor wheel, cracked compressor wheel or complete rupture of the compressor set. Once failure occurs, engine power cannot be sustained.
This condition is corrected by machining the rotating assembly to tune the natural frequency away from operating conditions.
The only affected site is Crystal River 3. (6) turbos have been shipped to this site.
None of the turbos have been installed and all are in storage. The FM parts department will arrange to have the turbos returned to the factory to have the necessary machining performed.
Sincerely, Todd Collins Manager, QA an EnPro Industries company 02/16/2004 MON 14:57 [TX/RX NO 5186] 001