The student who successfully completes this course should have a thorough understanding of the Incore Instrumentation System.  

Emphasis in this course is placed on those components that, if improperly maintained, can lead to unacceptable radiation doses and less than fully operational drive systems. These include the drive motor assemblies, the path transfer devices, and the seal table.  Also available for the students’ hands-on training are the control panels normally located in the control room. 

The course begins by explaining the purpose and operation of the movable incore detectors and the core exit thermocouples.  (At most plants, the reactor engineering staff operate this equipment and theI&C personnel repair the system.).  

Signal tracing exercises take the students through the various modes of operation and explain where problems can occur.  Mechanical maintenance of drive motor components such as the clutch and the position encoders is performed, and replacement procedures for components such as the detector and seals are discussed.  

Day 1 

Purpose of Incore Instrumentation System; description of IIS hardware and auxiliary equipment; running an incore flux map   

Day 2 

Functional description of position and current readout circuits; functional description of flux mapping drive circuits  

Day 3 

Detailed description of drive circuits and readout equipment; schematic tracing exercises; position and current readout   

Day 4 

Maintenance of containment equipment; drive motors; path transfer devices; seal table components   

Day 5 

Maintenance procedures and troubleshooting exercises