Effect of gamma irradiation on the strength of Climax stock quartz monzonite | Zendy

W. B. Durham | Zendy

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Effect of gamma irradiation on the strength of Climax stock quartz monzonite

Author(s) -

W. B. Durham

Publication year - 1982

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/59902

Subject(s) - quartz monzonite , climax , ultimate tensile strength , irradiation , quartz , gamma irradiation , materials science , composite material , gamma ray , mineralogy , geology , pluton , physics , biology , seismology , nuclear physics , ecology , tectonics

A laboratory study was made of the effects of a massive dose of {gamma} irradiation upon the mechanical properties of Climax stock quartz monzonite. Twenty-nine cylinders of rocks were tested using the Brazilian method and 26 strain gauged cylinders were tested to failure in uniaxial compression. One-half the cylinders in each group were subjected to a {gamma} ray dose of 13.2 MGy (1.32 x 10{sup 9} rads), or six times the maximum five-year dose to rock at the Spent Fuel Test-Climax, Nevada Test Site. The irradiation treatment lowered the ultimate compressional strength and lowered Young`s modulus under uniaxial loads greater than 20 MPa. The treatment did not measurable affect the elastic behavior of the rock in compression, nor did it affect the Brazilian tensile strength. These trends suggest that the {gamma} irradiation lowered the threshold stress at which microfractures begin to form. The irradiation has apparently not directly induced microfracturing in the rock, so a direct degrading effect on thermal and fluid transport properties is not expected

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