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Title: Real-Time Measurement of Material Elastic Properties in a High Gamma Irradiation Environment

Abstract

This paper describes the first noncontact elastic vibration measurements of an object in a high gamma radiation field. Using a laser-coupled resonant ultrasound technique, the vibration modes of an Inconel hollow capped cylinder were measured as the gamma radiation field was increased to 104 Gy/h. This measurement technique allowed shifts in the resonant frequency of the sample’s vibration modes to be tracked over a 170-h period. The vibration mode frequencies changed in a manner consistent with the temperature dependence of the elastic stiffness coefficients of the material. These results demonstrate the efficacy of the laser approach for real-time resonant ultrasound measurements in this severely hostile nuclear environment.

Authors:
; ;
Publication Date:
Research Org.:
Idaho National Laboratory (INL)
Sponsoring Org.:
DOE - NE
OSTI Identifier:
912468
Report Number(s):
INL/CON-05-00979
TRN: US0800413
DOE Contract Number:
DE-AC07-99ID-13727
Resource Type:
Conference
Resource Relation:
Conference: 5th International Conference on NDE in Relation to Strutural Integrity for Nuclear & Pressurized Com,San Diego, CA,05/10/2006,05/12/2006
Country of Publication:
United States
Language:
English
Subject:
46 - INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ELASTICITY; FLEXIBILITY; GAMMA RADIATION; IRRADIATION; LASERS; OSCILLATION MODES; TEMPERATURE DEPENDENCE; high radiation measurements; in situ laser ultrasonics; laser acoustics

Citation Formats

Ken Telschow, Rob Schley, and Dave Cottle. Real-Time Measurement of Material Elastic Properties in a High Gamma Irradiation Environment. United States: N. p., 2006. Web.
Ken Telschow, Rob Schley, & Dave Cottle. Real-Time Measurement of Material Elastic Properties in a High Gamma Irradiation Environment. United States.
Ken Telschow, Rob Schley, and Dave Cottle. Mon . "Real-Time Measurement of Material Elastic Properties in a High Gamma Irradiation Environment". United States. doi:. https://www.osti.gov/servlets/purl/912468.
@article{osti_912468,
title = {Real-Time Measurement of Material Elastic Properties in a High Gamma Irradiation Environment},
author = {Ken Telschow and Rob Schley and Dave Cottle},
abstractNote = {This paper describes the first noncontact elastic vibration measurements of an object in a high gamma radiation field. Using a laser-coupled resonant ultrasound technique, the vibration modes of an Inconel hollow capped cylinder were measured as the gamma radiation field was increased to 104 Gy/h. This measurement technique allowed shifts in the resonant frequency of the sample’s vibration modes to be tracked over a 170-h period. The vibration mode frequencies changed in a manner consistent with the temperature dependence of the elastic stiffness coefficients of the material. These results demonstrate the efficacy of the laser approach for real-time resonant ultrasound measurements in this severely hostile nuclear environment.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2006},
month = {Mon May 01 00:00:00 EDT 2006}
}

Conference:
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  • The first measurements of elastic vibrations of an object in-situ to a high gamma irradiation field using a laser coupled resonant ultrasound method are described. A vibration mode of an Inconel hollow capped cylinder was measured throughout a period of 170 hours as the gamma radiation field was increased to 104 Gray/hour. The vibration mode frequency was observed to change in a manner consistent with the temperature dependence of the elastic stiffness coefficients of the material. These results illustrate the efficacy of the laser approach for real-time resonant ultrasound measurements in this severely hostile nuclear environment.
  • This paper describes the first noncontact elastic vibration measurements of an object in a high gamma radiation field. Using a laser-coupled resonant ultrasound technique, the vibration modes of an Inconel hollow capped cylinder were measured as the gamma radiation field was increased to 104 Gy/h. This measurement technique allowed shifts in the resonant frequency of the sample's vibration modes to be tracked over a 170 h period. The vibration mode frequencies changed in a manner consistent with the temperature dependence of the elastic stiffness coefficients of the material. These results demonstrate the efficacy of the laser approach for real-time resonantmore » ultrasound measurements in this severely hostile nuclear environment.« less
  • An evaluation was made of the effects of environment and gamma irradiation on the short-term tensile and creep properties of Marlex CL-100, a highly cross-linked high-density polyethylene. This material is being considered as a constructional material for a low-level radioactive waste high-integrity container. It was found that the chemical environments studied could be beneficial or detrimental to strength and ductility depending on the type of mechanical property test and the nature of the exposure of the polyethylene to the chemical environment. Gamma irradiation to a sufficiently high dose prior to tensile or creep testing increased the strength and decreased themore » ductility. In-test irradiation, however, could increase or decrease the creep rate depending on the dose rate and applied stress.« less
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