Characterization of irradiated current-practice welds and A533 grade B class 1 plate for nuclear pressure vessel service

Technical Report · Fri Jul 01 04:00:00 EDT 1988

OSTI ID:7052644

McGowan, J J; Nanstad, R K; Thoms, K R

Studies of the effects of neutron irradiation on fracture toughness properties of steels have generally included a minimum number of tests for each material condition. The present study attempts to apply statistical analyses, with multiple testing at selected temperatures, to assess the accuracy and reliability of the results. Fracture toughness test specimens were irradiated in the Bulk Shielding Reactor at Oak Ridge National Laboratory at 288/degree/C to target neutron fluences of 2 /times/ 10/sup 23/ neutrons/m/sup 2/ (>1 MeV). The materials were ASTM A533 grade B class 1 plate (HSST Plate 02) and four submerged-arc welds representing the current fabrication practice for nuclear pressure vessels. Both unirradiated and irradiated specimens were tested by two separate laboratories, and multiple tests were conducted at selected temperatures. Statistical analyses permitted the determination of material and test variability and an interlaboratory comparison. Behavior in both the transition and ductile-shelf regions was studied. The results demonstrated the relatively low radiation sensitivity of low copper/nickel welds and the qualitative agreement between Charpy impact and fracture toughness observations of toughness degradation.

• Research Organization: Nuclear Regulatory Commission, Washington, DC (USA). Office of Nuclear Regulatory Research; Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7052644
• Report Number(s): NUREG/CR-4880-Vol.2; ORNL-6484/V2; ON: TI89001390
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360106 -- Metals & Alloys-- Radiation Effects
ALLOYS
ARC WELDING
COMPILED DATA
CONTAINERS
CRACKS
DATA
FABRICATION
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
IRRADIATION
JOINING
JOINTS
MATHEMATICS
MECHANICAL PROPERTIES
NUMERICAL DATA
PRESSURE VESSELS
RADIATION EFFECTS
STATISTICS
STEEL-ASTM-A533
STEELS
TEMPERATURE EFFECTS
WELDED JOINTS
WELDING