Four other types of radiation detectors are the self-powered neutron detector,
wide range fission chamber, flux wire, and photographic film.
DESCRIBE how the following detect neutrons:
Self-powered neutron detector
Wide range fission chamber
DESCRIBE how a photographic film is used to measure
Total radiation dose
Self-Powered Neutron Detector
In very large reactor plants, the need exists to monitor neutron flux in various portions of the
core on a continuous basis. This allows for quick detection of instability in any section of the
core. This need brought about the development of the self-powered neutron detector that is
small, inexpensive, and rugged enough to withstand the in-core environment. The self-powered
neutron detector requires no voltage supply for operation. Figure 29 illustrates a simplified
drawing of a self-powered neutron detector.
Figure 29 Self-Powered Neutron Detector