Stress corrosion cracking of Alloys 600 and 182 in BWR environments

Technical Report · Fri May 01 00:00:00 EDT 1992

OSTI ID:5041079

Ljungberg, L G; Hofling, C G; Sahlberg, A; Moeller, J ^[1]

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1. ABB Atom AB, Vaesteraas (Sweden)

Wrought Alloy 600 and weldments of Alloy 182 are being tested for initiation and propagation of intergranular stress corrosion cracking (IGSCC). Crack initiation is tested on compact tension (CT) specimens with U-notches of various radii under enhanced crevice conditions, in a test loop in a Swedish BWR. After one year exposure there was initiation of IGSCC in a large portion of the Alloy 182 specimens, but nearly no initiation in Alloy 600. Crack propagation was measured in a laboratory loop on CT specimens under constant or cyclic load. Low carbon Alloy 600, or Alloy 182 high in titanium and niobium versus carbon, cracked at lower rates than material with high carbon activity. Materials with low concentrations of phosphorus and sulfur cracked slower than those high in these elements in clean environment, but no such effect was found in environment with sulfate. Alloy 182 weld metal generally cracked at higher rates than Alloy 600.

• Research Organization: Electric Power Research Inst., Palo Alto, CA (United States); ABB Atom AB, Vaesteraas (Sweden)
• Sponsoring Organization: EPRI; Electric Power Research Inst., Palo Alto, CA (United States)
• OSTI ID: 5041079
• Report Number(s): EPRI-TR-100658
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
36 MATERIALS SCIENCE
BWR TYPE REACTORS
REACTOR COMPONENTS
INCONEL 600
INTERGRANULAR CORROSION
STRESS CORROSION
AGING
CRACK PROPAGATION
STAINLESS STEEL-304
THERMAL EXPANSION
WELDED JOINTS
ALLOY-NI76CR15FE8
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
AUSTENITIC STEELS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM-NICKEL STEELS
CORROSION
CORROSION RESISTANT ALLOYS
ENRICHED URANIUM REACTORS
EXPANSION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
INCONEL ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MATERIALS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIMONIC
POWER REACTORS
REACTORS
STAINLESS STEELS
STEEL-CR19NI10
STEELS
THERMAL REACTORS
TITANIU
TITANIUM ADDITIONS
WATER COOLED REACTORS
WATER MODERATED REACTORS
210100* - Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
360105 - Metals & Alloys- Corrosion & Erosion