This document applies to pressurized water reactors (PWRs) and presents requirements for the monitoring of adequate cooling within the core in all operations, including normal and abnormal operations. Requirements for core cooling monitoring during conditions beyond a design basis accident, i.e. a design extension condition of type A or type B, are also covered in this document.
This document defines requirements for instrumentation to measure coolant parameters, which are of interest when abnormal conditions arise with either one or two phases of coolant or with gas included in the reactor pressure vessel (RPV).
PWR users can acquire this instrumentation to present information on coolant conditions, to assist the operator to decide on actions necessary to maintain adequate core cooling.
Typical applications in operating nuclear power plants are also presented in this document.
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