Terminology:

Considerate how the reactor power monitoring detection equipment works needs a working knowledge of basic terminology.

Signal-to-Noise Ratio

It is the ratio of the electrical outcome signal to the electrical noise produced within the cable run or in the instrumentation.

Discriminator

Discrimination in radiation detection circuits refers to the procedure of distinguishing among various categories of radiation on the basis of pulse height.  This circuit selects the minimum or maximum pulse height which is to be counted.