Steam generator chemical cleaning: demonstration test No. 2 in a pot boiler

Technical Report · Sat Aug 01 04:00:00 EDT 1981

OSTI ID:6268246

Key, G L; Fink, G C; Helyer, M H

The effectiveness of the EPRI Mark II chemical cleaning solvent process was tested utilizing a 4-tube pot boiler that had previously been fouled and dented under 81 days of high chloride fault chemistry operation. One laboratory cleaning demonstration of 94.25 hours was performed. Essentially all of the low copper content (approximately 5%) sludge was removed. Approximately 38% of the previously fouled and dented tube/ring and tube/support crevice regions were effectively cleaned. Severe localized corrosion (predominantly pitting) was observed on A533 Grade A and A508 Class 2 carbon steels (nominal pit depths were 30 and 6 mils, respectively). General surface corrosion and/or minor pitting type corrosion was observed for all other materials tested (Types 405/409 stainless steels and AISI 1010 carbon steel), except for Inconel 600 specimens which had no indications of tube surface corrosion.

• Research Organization: Combustion Engineering, Inc., Windsor, CT (USA). Nuclear Power Systems
• OSTI ID: 6268246
• Report Number(s): EPRI-NP-1976; ON: DE81904251
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
ALLOYS
BOILERS
CARBON STEELS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CLEANING
CORROSION
CORROSION PRODUCTS
CORROSION RESISTANT ALLOYS
FOULING
IRON ALLOYS
IRON BASE ALLOYS
PITTING CORROSION
REMOVAL
STAINLESS STEELS
STEAM GENERATORS
STEELS
VAPOR GENERATORS