Application of magnetomechanical hysteresis modeling of magnetic techniques for monitoring neutron embrittlement and biaxial stress. First year report, June 1991--June 1992

Technical Report · Sun Jan 31 04:00:00 EST 1993

DOI:https://doi.org/10.2172/10132973· OSTI ID:10132973

Sablik, M J; Kwun, H; Burkhardt, G L; Rollwitz, W L; Cadena, D G

Objective of this project is to investigate experimentally and theoretically the effects of neutron embrittlement and biaxial stress on magnetic properties in steels, using various magnetic measurement techniques. If neutron embrittlement and biaxial stress can be measured via changes in magnetic properties, this should ultimately assist in safety monitoring of nuclear power plants and of gas and oil pipelines. This first-year report addresses the issue of using magnetic property changes to detect neutron embrittlement. The magnetic measurements were all done on irradiated specimens previously broken in two in a Charpy test to determine their embrittlement. The magnetic properties of the broken charpy specimens from D.C. Cook did not correlate well with fluence or embrittlement parameters, possible due to metallurgical reasons. correlation was better with Indian Point 2 specimens, with the nonlinear harmonic amplitudes showing the best correlation (R{sup 2}{approximately}0.7). However, correlation was not good enough. It is recommended that tests be done on unbroken irradiated Charpy specimens, for which magnetic characterization data prior to irradiation is available, if possible.

• Research Organization: Southwest Research Inst., San Antonio, TX (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG05-91ER14180
• OSTI ID: 10132973
• Report Number(s): DOE/ER/14180--2; ON: DE93009759
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200
36 MATERIALS SCIENCE
360106
42 ENGINEERING
420500
CHARPY TEST
COOK-2 REACTOR
INDIAN POINT-2 REACTOR
MAGNETIC TESTING
MATERIALS TESTING
PHYSICAL RADIATION EFFECTS
POWER REACTORS
NONBREEDING
LIGHT-WATER MODERATED
NONBOILING WATER COOLED
PROGRESS REPORT
RADIATION EFFECTS
STEELS
SURVEILLANCE