Method for controlling crevice chemistry on the secondary side o

Details Method for controlling crevice chemistry on the secondary side o Method for controlling crevice chemistry on the secondary side o

1993-10-13

1995-03-14

McMahon, Timothy M.

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Maintaining environment nondestructive to metal

422 7, 422 18, C23F 1118

Patent

active

053975340

ABSTRACT:
A method for detecting pH imbalances and/or achieving pH balance in crevices of a pressurized water reactor steam generator. The method comprises obtaining hideout return concentrations of sodium, chloride, calcium and sulfate ions, and silica from the water in the secondary side of the steam generator, the concentrations being expressed as moles per kilogram of water, and determining whether the following conditions exist:

REFERENCES:
"Selection and Application of Ratio Control Approach", S. G. Sawochka, Nov. 18-20, 1992.
"Cation/Anion Ration Control", M. W. Rootham, Nov. 18-20, 1992 San Diego.
"PWR Secondary Water Chemistry Guidelines-Revision 3", Electric Power Research Institute, May 1993.

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