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.
You can specify the type of files you want, for your gadget.IEC 60231G Ed. 1.0 b:1977, Seventh supplement: Liquid-metal cooled fast reactors | IEC TC/SC 45A. Just read it with an open mind because none of us really know.