Steam generator chemical cleaning program at Arkansas Nuclear One
Arkansas Nuclear One (ANO) is a two-unit nuclear power-generating station. Unit One (ANO-1) was designed by Babcock and Wilcox (B and W), and Unit Two (ANO-2) was designed by Combustion Engineering. During operation of ANO-1, corrosion products and feedwater contaminants are introduced into the Once-Through Steam Generators (OTSG). As the feedwater is changed to steam inside the OTSG, most of this material is left behind. Power was reduced on ANO-1 in June, 1981, to maintain downcomer water level within the operating range. Visual inspections confirmed heavy deposits on tubes, and on the fifth and sixth tube support plates in the ANO-1A OTSG. The option Arkansas Power and Light Company (AP and L) has chosen for the ultimate removal of these deposits is chemical cleaning. The total AP and L chemical cleaning plan is divided into a four-phase program. Feedwater nozzles were replaced, the orifice plate openings were increased by 25%, and several controlled flushings were performed in April and May, 1982. The combination of these activities returned ANO-1 to 100% power. ANO-1 remained at full power until the refueling outage in January, 1983. Since full power was restored, the cleaning has been postponed until further testing can be performed and evaluated. It still appears that chemical cleaning is inevitable.
- Research Organization:
- Arkansas Power and Light Company, Little Rock, Arkansas
- OSTI ID:
- 5244742
- Report Number(s):
- CONF-830905-
- Journal Information:
- Am. Soc. Mech. Eng., (Pap.); (United States), Journal Name: Am. Soc. Mech. Eng., (Pap.); (United States) Vol. 83-JPGC-NE-2; ISSN ASMSA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
ADDITIVES
ARKANSAS-1 REACTOR
BOILERS
CHEMICAL REACTIONS
CLEANING
COOLING SYSTEMS
CORROSION
CORROSION PRODUCTS
DEPOSITION
DESCALING
DETERGENTS
EMULSIFIERS
ENERGY SYSTEMS
ENRICHED URANIUM REACTORS
FAILURES
FEEDWATER
HYDROGEN COMPOUNDS
MANAGEMENT
ONCE-THROUGH COOLING SYSTEMS
OPERATION
OXYGEN COMPOUNDS
POWER REACTORS
PRESSURE DROP
PROCESSING
PWR TYPE REACTORS
REACTORS
SCALING
STEAM GENERATORS
SURFACE CLEANING
SURFACE FINISHING
SURFACTANTS
TESTING
TUBES
VAPOR GENERATORS
WASTE MANAGEMENT
WASTE PROCESSING
WATER
WATER COOLED REACTORS
WATER MODERATED REACTORS
WETTING AGENTS