CX-020783: Irradiation of Optical Components of In-Situ Laser Spectroscopic Sensors for Advanced Nuclear Reactor Systems – University of Michigan

The University of Michigan (UM), in collaboration with Ohio State University, proposes to investigate the effect of radiation damage in optical materials (such as transparent viewports) on the operation and performance of laser spectroscopic sensors. These sensors require unimpeded optical access to the surface or bulk of the material being measured. The project will also evaluate the effect of irradiation on nonlinear optical absorption which is critical for propagation. Windows and optical fibers comprised of various materials (including fused silica glass, BK7 glass, and quartz) will be irradiated by gamma rays and neutrons at the Ohio State University’s Nuclear Reactor Laboratory (OSU-NRL) to determine the effect of irradiation on their optical transparency. The tasks associated with this project are (1) Construct and test mobile optical characterization setup and sample furnace; (2) Conduct preliminary gamma irradiation and post-irradiation examination (PIE); (3) Conduct irradiation and PIE with post-heating; (4) Conduct irradiation and PIE concurrent heating; and (5) Develop preliminary concepts for deployment in advanced reactors. Existing laboratory facilities will be used.