A Microprocessor Based Automatic Flux Mapping System for Pressurized Water Reactors

A microprocessor controlled Flux Mapping System has been designed which permits automatic three-dimensional flux distribution measurements of a reactor core. The Flux Mapping System consists of a Detector Drive System which provides the mechanical means for routing movable detectors into and out of the core, and a Flux Mapping Console which allows for complete and automatic control of drive system operation, data gathering and system output. Both the Flux Mapping Console and the detector Drive System, their features and construction, are described. The console design is implemented using multiple microprocessors with a redundant internal architecture and a modular bus oriented construction that uses standard printed circuit boards. Overator interface is via an interactive CRT and keyboard. Low level analog signals from the detectors are digitized; scanning is synchronized with detector position; and automatic ranging is utilized for maximum resolution. Multiple data links allow data to flow from memory to printers, floppy discs, and a plant process computer. The microprocessors perform self-checking and system diagnostics for maximum system availability.