ENS 40524

v t e ENS Event
06:00 Feb 16, 2004
Title	Part 21.21 Notification of Potential Safety Hazard Associated with Use of Turbocharger
Event Description	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.

ENS 40524 +/-
Where
Fairbanks Morse Engine Beloit, Wisconsin (NRC Region 3)
Organization:	Fairbanks Morse Engine
Reporting

10 CFR 21.21
Time - Person (Reporting Time:+8.95 h0.373 days <br />0.0533 weeks <br />0.0123 months <br />)
Opened:	Todd Collins (Fax) 14:57 Feb 16, 2004
NRC Officer:	Arlon Costa
Last Updated:	Feb 16, 2004
40524 - NRC Website
v • d • e

v t e Emergency Notification System
Fairbanks Morse Engine with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation
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