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Title: Rotor retrofit boosts turbine output and efficiency by 1. 67%

Abstract

In service since 1973, Commonwealth Edison Co.'s 2-unit Zion station is one of the earlier 1,000-MWe-range nuclear generating power plants. In the mid-1980s, both turbines were treated to a multi-million-dollar steam path component retrofit after stress corrosion-induced turbine blade failures caused lengthy forced outages. ABB's Utility Steam Turbine Division completed the work, and at 1,040 MW each, Zion's steam turbines are believed to be the largest ever to be retrofitted with non-original equipment manufacturer (OEM) rotors and related components. As a result of the retrofit, two-unit generating capacity increased by approximately 1.6% (17 MWe). Furthermore, the retrofit allowed Zion to extend the frequency of normal turbine inspection and overhaul intervals. This article reports that, after 7-1/2 years of service, a recent inspection revealed that the steam path components were still in mint condition with no signs of stress corrosion cracking.

Authors:
;
Publication Date:
OSTI Identifier:
7076289
Resource Type:
Journal Article
Journal Name:
Power Engineering; (United States)
Additional Journal Information:
Journal Volume: 98:4; Journal ID: ISSN 0032-5961
Country of Publication:
United States
Language:
English
Subject:
20 FOSSIL-FUELED POWER PLANTS; ROTORS; RETROFITTING; STEAM TURBINES; TURBINE BLADES; PERFORMANCE; EQUIPMENT; MACHINERY; TURBINES; TURBOMACHINERY; 200104* - Fossil-Fueled Power Plants- Components

Citation Formats

La Fontaine, J, and Heim, G J. Rotor retrofit boosts turbine output and efficiency by 1. 67%. United States: N. p., 1994. Web.
La Fontaine, J, & Heim, G J. Rotor retrofit boosts turbine output and efficiency by 1. 67%. United States.
La Fontaine, J, and Heim, G J. 1994. "Rotor retrofit boosts turbine output and efficiency by 1. 67%". United States.
@article{osti_7076289,
title = {Rotor retrofit boosts turbine output and efficiency by 1. 67%},
author = {La Fontaine, J and Heim, G J},
abstractNote = {In service since 1973, Commonwealth Edison Co.'s 2-unit Zion station is one of the earlier 1,000-MWe-range nuclear generating power plants. In the mid-1980s, both turbines were treated to a multi-million-dollar steam path component retrofit after stress corrosion-induced turbine blade failures caused lengthy forced outages. ABB's Utility Steam Turbine Division completed the work, and at 1,040 MW each, Zion's steam turbines are believed to be the largest ever to be retrofitted with non-original equipment manufacturer (OEM) rotors and related components. As a result of the retrofit, two-unit generating capacity increased by approximately 1.6% (17 MWe). Furthermore, the retrofit allowed Zion to extend the frequency of normal turbine inspection and overhaul intervals. This article reports that, after 7-1/2 years of service, a recent inspection revealed that the steam path components were still in mint condition with no signs of stress corrosion cracking.},
doi = {},
url = {https://www.osti.gov/biblio/7076289}, journal = {Power Engineering; (United States)},
issn = {0032-5961},
number = ,
volume = 98:4,
place = {United States},
year = {Fri Apr 01 00:00:00 EST 1994},
month = {Fri Apr 01 00:00:00 EST 1994}
}