scope:

This report covers the principles which should be followed in the use of digital computers for alarm, instrumentation, record and equipment protection purposes on nuclear reactor units. This report is not a document on design but a guide to the application of digital computer systems. This report applies to all on-line applications of digital process computer systems to nuclear reactors and to off-line applications immediately associated with the on-line system, susch as would normally use the same equipment. The recommendations are based on recognized practice in the process computer field and are functional in nature. These recommendations are not intended to affect the obligations that a supplier of equipment, services or programmes may have for satisfactory performance in any specific application. General recommendations are given for the application of such systems, for the equipment and programmes and for performance and maintenance.