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ASTM Standards for Reactor Dosimetry and Pressure Vessel Surveillance

Description: The ASTM standards provide guidance and instruction on how to field and interpret reactor dosimetry. They provide a roadmap towards understanding the current ''state-of-the-art'' in reactor dosimetry, as reflected by the technical community. The consensus basis to the ASTM standards assures the user of an unbiased presentation of technical procedures and interpretations of the measurements. Some insight into the types of standards and the way in which they are organized can assist one in using … more
Date: September 14, 1999
Creator: GRIFFIN, PATRICK J.
Partner: UNT Libraries Government Documents Department
open access

An ``exact`` treatment of self-shielding and covers in neutron spectra determinations

Description: Most neutron spectrum determination methodologies ignore self-shielding effects in dosimetry foils and treat covers with an exponential attenuation model. This work provides a quantitative analysis of the approximations in this approach. It also provides a methodology for improving the fidelity of the treatment of the dosimetry sensor response to a level consistent with the user`s spectrum characterization approach. A library of correction functions for the energy-dependent sensor response has … more
Date: June 1, 1995
Creator: Griffin, Patrick J. & Kelly, John G.
Partner: UNT Libraries Government Documents Department
open access

Adjustment of the (235)U Fission Spectrum

Description: The latest nuclear data are used to examine the sensitivity of the least squares adjustment of the {sup 235}U fission spectrum to the measured reaction rates, dosimetry cross sections, and prior spectrum covariance matrix. All of these parameters were found to be very important in the spectrum adjustment. The most significant deficiency in the nuclear data is the absence of a good prior covariance matrix. Covariance matrices generated from analytic models of the fission spectra have been used i… more
Date: September 14, 1999
Creator: GRIFFIN,PATRICK J. & WILLIAMS,J.G.
Partner: UNT Libraries Government Documents Department
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