Operating and design experience with control and instrumentation systems at San Onofre Nuclear Generating Station

With the increasing interest and emphasis in safety and environmental effects of nuclear generating stations by Governmental as well as public and private agencies, the necessity of having extremely reliable control and instrumentation systems is one of the major items that must be considered in the operation of a nuclear generating station. Extensive initial testing, routine testing and maintenance of the operating plant is essential to locate and eliminate problems that could negate the correct operation of Control and Instrumentation systems. This paper discusses some of the Control and Instrumentation system problems and their solutions encountered at the San Onofre Nuclear Generating Station.