Enhanced functions of process computer systems for nuclear power plants

The plant process computer system is a system of computer hardware and software that is integrated to acquire large amounts of plant data on a real-time basis. The purpose is to perform calculations which will provide plant operators with critical operating parameters in normal and emergency situations. There have been numerous efforts in nuclear power plants around the world to upgrade or replace plant process computers with enhanced functions. This paper describes the system operation and performance of process computers, their functionalities and communications, and their enhanced functions in software and hardware. A prudent approach to upgrade process computers with enhanced functions can help utilities address obsolescence problems, support improved fuel design, reduce operation and maintenance cost, and increase plant and people productivity. In addition, it provides a framework for plant-wide monitoring to support future instrumentation and control upgrades. (author). 3 refs, 6 figs, 1 tab