IEC 63374:2025 pdf download,Nuclear power plants – Instrumentation systems important to safety – Characteristics and test methods of nuclear reactor reactivity meters.

IEC 63374:2025 defines the characteristics and test methods for reactivity meters. This document does not cover alternative approaches for measuring reactivity. It offers guidance for the design, manufacturing, and operation of these instruments.

Applicable to various nuclear reactor types that can be modeled using the neutron kinetic point reactor model—such as pressurized water reactors (PWRs), boiling water reactors (BWRs), and fast breeder reactors (FBRs)—this standard pertains to all online measuring devices that derive reactivity values directly from neutron flux measurements. The subject matter falls within the domain of reactor nuclear parameter measurement.