Experience in the repair of steam generator auxiliary feedwater nozzle
- Consumers Power Co., Jackson, MI (United States)
The auxiliary feedwater nozzle is quite often subjected to more thermal stress cycles and other loading mechanisms during their service life than the material was designed and fabricated for at the nozzle of the earlier steam generators in many nuclear plants. During plant operation, the auxiliary feedwater nozzle outlet is exposed to the hot steam from the generator side, while the auxiliary feedwater piping which contains subcooled water from the inlet often induces water hammer as a result of the steam-water mixing phenomena. The thermal cycles and the steam bubble collapse at the nozzle may cause cracking in the nozzle liner and interior surface of the nozzle, and subsequently results in structural damage to the steam generator. This presentation is intended to share the lessons learned from the evaluation of the nozzle condition and the subsequent modification and repair made to the auxiliary feedwater nozzle at the Palisades Nuclear Plant. Other nuclear plant owners may benefit from this experience.
- OSTI ID:
- 404240
- Report Number(s):
- CONF-960706-; ISBN 0-7918-1786-5; TRN: 97:000403
- Resource Relation:
- Conference: American Society of Mechanical Engineers (ASME) pressure vessels and piping conference, Montreal (Canada), 21-26 Jul 1996; Other Information: PBD: 1996; Related Information: Is Part Of Pressure vessels and piping codes and standards: Volume 2. PVP-Volume 339; Esselman, T.C. [ed.] [Altran Corp., Boston, MA (United States)]; Balkey, K. [ed.] [Westinghouse Electric Corp., Pittsburgh, PA (United States)]; Chao, K.K.N. [ed.] [Consumers Power Co., Jackson, MI (United States)]; Gosselin, S. [ed.] [Electric Power Research Institute, Charlotte, NC (United States)]; Hollinger, G. [ed.] [Babcock and Wilcox, Barberton, OH (United States)]; Lubin, B.T. [ed.] [ABB Combustion Engineering, Windsor, CT (United States)]; Mohktarain, K. [ed.] [CB and I Technical Services, Plainfield, IL (United States)]; O`Donnell, W. [ed.] [O`Donnell Consulting Engineers, Inc., Pittsburgh, PA (United States)]; Rao, K.R. [ed.] [Entergy Operations, Inc, Jackson, MI (United States)]; PB: 225 p.
- Country of Publication:
- United States
- Language:
- English
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