Steam Generator Replacement

During the 40 year initial license period of a pressurized water reactor, replacement of the steam generators is likely at least once. Eventually, when about 15% of the 3000+ tubes in the steam generator have been plugged, heat transfer properties deteriorate such that replacement is needed for the plant to maintain full power. Typically an outage will require 35 to 60 days to replace steam generators. Steam generator costs run ~ $100 million.

This photo shows a new steam generator being lifted for placement in the steam generator vault.

Courtesy Tractabel

Other steps in the replacement process are:

Special thanks to Tractabel for making these photos available.

Copyright 1996-2004.  Joseph Gonyeau. All rights reserved. Revised: March 15, 2001.

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