Self-powered in-core detector arrangement for measuring flux in a nuclear reactor core

A method of providing a detector assembly for measuring flux in a nuclear reactor core comprising:

• arranging a plurality of self-powered in-core detector arrangements in the nuclear reactor core each for measuring flux at a different one of a plurality of axial locations in the nuclear reactor core;
• connecting an assembly connector to the self-powered in-core detector arrangements, the assembly connector comprising a plurality flux signal terminals each connected to one of self-powered in-core detector arrangements, the assembly connector configured to be connected to a power plant connector,
• at least one of the self-powered in-core detector arrangements comprising a set of at least two self-powered in-core detectors for measuring flux at a same one of the axial locations in the nuclear reactor core,
• each of the at least two self-powered in-core detectors including a sheath, a detector material section inside the sheath, an insulator between the sheath and the detector material, and a flux signal output line, the flux signal output lines of the at least two self-powered in-core detectors being joined together to provide a combined flux signal, and
• connecting the joined flux signal output lines to a same one of the flux signal terminals of the assembly connector.