STP1228

    The Modified Notched Neutron Spectrum Technique for the Surveillance of Hydrogen in Reactor Materials

    Published: Jan 1994


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    Abstract

    The determination of hydrogen content in power reactor materials is a component of an overall surveillance program. Unfortunately, techniques that accurately and nondestructively measure hydrogen content at parts-per-million (ppm) levels have not previously been available. One possible hydrogen measuring technique is based upon the “notched neutron spectrum technique” that has been implemented by EG&G Idaho to characterize hydrogen content in reactor materials for the U.S. Navy. Modifications to this technique have already been demonstrated that increase its sensitivity and utility, allowing for a current accuracy of 0.4 micrograms of hydrogen per gram of steel or an equivalent weight of 6 micrograms in a typical steel sample. This paper describes further tests that have increased the dynamic range of these measurements and provided verification of the absolute calibration of the method.

    Keywords:

    nuclear techniques, nondestructive testing, hydrogen determination


    Author Information:

    Miller, WH
    Professor, Nuclear Engineering Program, University of Missouri, Columbia, MO


    Paper ID: STP15120S

    Committee/Subcommittee: E10.05

    DOI: 10.1520/STP15120S


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