Chemical cleaning of a steam generator during mode 5...

Details Chemical cleaning of a steam generator during mode 5... Chemical cleaning of a steam generator during mode 5...

2007-12-04

2007-12-04

Wilson, Gregory (Department: 3749)

Liquid heaters and vaporizers

Cleaning

C134S002000

Reexamination Certificate

active

11212250

ABSTRACT:
A Nuclear Steam Supply Stem (NSSS) Mode 5 Steam Generator Chemical Cleaning system is disclosed which applies chemical cleaning solvent (formulated to remove SG deposits) to the secondary side of the SG using primary side supplied heat during NSS Mode 5 shutdown to maintain the desired application temperature. Mixing is achieved via nitrogen sparging.

REFERENCES:
patent: 3684720 (1972-08-01), Richardson
patent: 4632705 (1986-12-01), Baum
patent: 5264041 (1993-11-01), Kuhnke et al.
patent: 5368775 (1994-11-01), Rossi et al.
patent: 5575863 (1996-11-01), Sala et al.
patent: 5841826 (1998-11-01), Rootham et al.
Effect of Chemical Cleaning on Steam Generator Tube Performance website: http://www.informaworld.com/smpp/content˜content=a713855461˜db=all.

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