8. Internal instrumentation systems from other manufacturers
The internal instrumentation systems presented below are reference systems, intermittently measuring 3D power distribution in the core with optimum precision. As such, they are functionally directly comparable to the French RIC system.
We have chosen two solutions as representative examples in their respective fields, one existing in German reactors built by Siemens and the other installed in reactors built by Babcock and Wilcox in the United States.
8.1 Siemens Aeroball system
This system is in fact derived from the first internal instrumentation system developed by the American company Westinghouse, from which Siemens was made redundant in the early 1970s. Such a system also existed on the first power plant built by Framatome, the...
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Internal instrumentation systems from other manufacturers
Developments and evolutions
Appendix – Description of treatments performed
(Mathematical development by Gérard RIO, Process Technical Development Department at Framatome - ANP)
Calculation of theoretical power distribution
We have already seen that we need to compare measured power (activity) and calculated power (activity) in instrumented assemblies.
Since the signal from fission detectors is proportional...
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