IEC 60231G:1977

Deals in particular with measurements: of neutron fluence rate (flux); of residual activity; of the temperature, flow rate, activity and purity of the sodium (or other liquid metal). Deals also with the protection and control systems.
The IEC 60231 series of standards is no longer up-to-date and will not be revised by IEC. The standards are maintained for the time being for bibliographical purposes and because they were used in the past for the design of nuclear power plants which are still in operation.