Radiation Effects Assessment in Environments of Pulsed Neutron and Sustained Gamma Exposure

Project: Research project

Project Details

Description

The effects of radiation on fiber optic based systems and measurement sensors need to be evaluated to understand their capabilities and limitations. These evaluations are necessary for a series of component qualification reactor experiments. For example, in December 2000, Los Alamos National Laboratory (LANL) conducted two experiments in the fuel-ringed external cavity (FREC-II) of the Annular Core Research Reactor (ACRR) at Sandia National Laboratories, NM (SNL) to aid in the certifications of the U.S. nuclear weapon stockpile. Prior to conducting those experiments, all of the piezoresistive Kulite pressure probes failed, despite the fact that similar pressure transducers were demonstrated to function as designed in a neutron pulse environment. LANL sponsored the Depleted Uranium Strain and Temperature (DUST) experiment in August 2005 at the ACRR. The experiment served to investigate the performance of several sensors in a pulsed radiation environment. In addition, the DUST experiment was intended to investigate the validity of computer predictions of neutronic response and thermal behavior of U6Nb specimens. The DUST experiment has raised additional questions including the validity of present strain gage bridge configurations, the accuracy of materials data, and delay times associated with temperature measurement. ASU shall extend the DUST experimental analyses to address at least the bridge configuration issue and recommend further testing and analysis which could affect the manner in which future ACRR testing is conducted. LANL performed the Jason experiment in 2003 and 2004. The experiment involved a series of ACRR reactor tests on twelve similar test articles, during which temperature and gas pressure were measured. Using the gained understanding regarding the performance of various sensors within the pulsed reactor environment of the ACRR from other experiments, ASU shall select valid sensory data from the Jason series of experiments and shall quantify the coupon out gassing by using pressure and temperature measurements for at least three of the twelve test articles
StatusFinished
Effective start/end date5/1/076/30/12

Funding

  • US Department of Energy (DOE): $121,750.00

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