Accession Number : AD0672890

Title :   NOTCH DUCTILITY AND TENSILE PROPERTY EVALUATION OF THE PM-2A REACTOR PRESSURE VESSEL.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Serpan,Charles Z. , Jr

Report Date : 19 JUN 1968

Pagination or Media Count : 23

Abstract : Following the pressurization-to-failure testing of the PM-2A reactor pressure vessel, several sections of steel were removed from the vessel wall in a region adjacent to the artificial defect. Charpy V-notch and tension test specimens machined from one of these sections have been evaluated. The irradiated-condition 30 ft-lb transition temperatures for the 1/4-thickness (nearest to the core) and 3/4-thickness locations in the vessel wall were +115F and +55F, respectively, for measured fission-spectrum fluences of 7.3 and 4.0 X 10 to the 18th power n/sq cm (greater than 1 Mev). The 1/4-thickness properties and fluence most nearly represented those at the tip of the artificial defect. The 0.2% yield strength for the 1/4-thickness location was 97,620 psi at -20F (failure temperature) and 92,200 psi at +72F (temperature at time of acid-sharpening treatment of artificial defect). Significant uniform elongation, reduction of area, and elongation per 1 in. were retained by the steel. An assessment of the stress, temperature, and flaw-size conditions for the PM-2A failure, as indexed by the irradiated-condition mechanical properties, indicates that the failure is in agreement with the generalized fracture analysis diagram. (Author)

Descriptors :   (*NUCLEAR REACTORS, PRESSURE VESSELS), (*PRESSURE VESSELS, MECHANICAL PROPERTIES), NOTCH SENSITIVITY, REACTOR OPERATION, TENSILE PROPERTIES, NEUTRONS, DOSIMETERS, LIGHT WATER REACTORS, DAMAGE, RADIATION EFFECTS, EMBRITTLEMENT, THICKNESS, BRITTLENESS, NONDESTRUCTIVE TESTING, TRANSITION TEMPERATURE, STEEL, DEFECTS(MATERIALS), FRACTURE(MECHANICS), PRESSURIZATION

Subject Categories : Containers and Packaging
      Nuclear Fission Reactors(non-power)
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE