Ethanolamine properties and use for feedwater pH control: A pressurized water reactor case study

Conference · Sun Dec 31 04:00:00 UTC 1995

OSTI ID:203746

Keeling, D L; Polidoroff, C T; Cortese, S ^[1]; Cushner, M C ^[2]

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1. Pacific Gas and Electric Co., Avila Beach, CA (United States)
2. Union Carbide Corp., South Charleston, WV (United States)

Ethanolamine (ETA) as a feedwater pH control additive has been recently used to minimize corrosion of secondary water components in the nuclear power industry pressurized water reactors (PWRs). The use of ETA is compared with ammonia. Relative volatility effects on various parts of the system are analyzed and chemistry changes are presented. Materials of construction and the use of existing plant equipment for ETA service are discussed. Properties of ETA as well as safety, storage and handling issues are compared with ammonia. Health d aquatic toxicity are reviewed. warnings, safety, handling guidelines, biodegradability an Diablo Canyon Power Plant used ammonia for pH control from 1985 until a change over to ETA in 1993/1994. Full flow condensate polishers that are required to protect the plant from saltwater cooling incursions limit the amount of pH additive. Iron levels in the secondary water systems are compared before and after changing to ETA and replacement of corrosion-susceptible piping. Iron reduction benefits are assessed along with other effects on the feedwater nozzles, low pressure turbine, polisher resin capacity and polisher regeneration system.

• OSTI ID: 203746
• Report Number(s): CONF-950816--; ISBN 1-877914-95-9
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
ADDITIVES
AMINES
CORROSION
DIABLO CANYON-1 REACTOR
DIABLO CANYON-2 REACTOR
FEEDWATER
FOULING
IONIC CONDUCTIVITY
MATERIALS HANDLING
PH VALUE
RECOMMENDATIONS
SAFETY
SECONDARY COOLANT CIRCUITS
STORAGE
TOXICITY
WATER CHEMISTRY