Monitoring of In-core Fuel, Coolant and Structure with High-energy Neutron and Gamma Diagnostics
High energy neutrons and gammas emitted from nuclear fuel and surrounding materials have been successfully used to detect and monitor the locations of fuel and structure in in-reactor experiment settings. One and two-dimensional (ONEDANT and TWODANT) computations support the viability of applying that basic diagnostic technique to the monitoring of core, coolant, and structure in LWRs, both during normal operation and in core uncovery situations. The experimental and analytical work that supports this diagnostic concept will be described, and application to LWR accident prevention, mitigation, and recovery will be outlined.
Dr. DeVolpi invented, developed, and applied various versions of the Fast Neutron Hodoscope. This diagnostic device provided indispensable information on fuel motion during dozens of transient experiments on nuclear fuels conducted in the Transient Reactor Test (TREAT) facility, a reactor formerly operated by Argonne at its Idaho site.