Microbially Influenced Corrosion of Stainless Steels in Nuclear Power Plants

Conference · Sun Oct 07 04:00:00 EDT 1990

OSTI ID:5561079

Sinha, U. P. ^[1]; Wolfram, J. H. ^[1]; Rogers, R. D. ^[1]

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1. Idaho National Engineering Laboratory (INEL), Idaho Falls, ID (United States)

This paper reviews the components, causative agents, corrosion sites, and potential failure modes of stainless steel components susceptible to microbially influenced corrosion (MIC). The stainless steel components susceptible to MIC are located in the reactor coolant, emergency, and reactor auxiliary systems, and in many plants, in the feedwater train and condenser. The authors assessed the areas of most high occurrence of corrosion and found the sites most susceptible to MIC to the heat-affected zones in the weldments of sensitized stainless steel. Pitting is the predominant MIC corrosion mechanisms, caused by sulfur reducing bacteria (SRB). Also discussed is the current status of the diagnostic, preventive, and mitigation techniques, including use of improved water chemistry, alternate materials, and improved thermomechanical treatments.

• Research Organization: EG and G Idaho, Inc., Idaho Falls, ID (United States); Idaho National Engineering Laboratory (INEL), Idaho Falls, ID (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 5561079
• Report Number(s): EGG-M--90113; CONF-9010138--4; ON: DE91013215
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
BACTERIA
CHEMICAL REACTIONS
CLEANING
CORROSION
ENRICHED URANIUM REACTORS
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MICROORGANISMS
MITIGATION
MONITORING
POWER REACTORS
PWR TYPE REACTORS
REACTORS
ROBINSON-2 REACTOR
SALEM-1 REACTOR
SEQUOYAH-1 REACTOR
STAINLESS STEELS
STEELS
THERMAL REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
WELDED JOINTS