Two identical fission chamber neutron detectors (operating in the proportional region) are being used to monitor the neutron flux during a reactor startup.
Detector A has developed a tiny leak and the argon fill gas pressure has decreased to approximately 25 percent of the gas pressure in detector B.
When the reactor reaches criticality, the neutron level indicated by detector A will be __________ than the neutron level indicated by detector B, primarily because the incident neutrons result in __________.
A. larger; more fissions in detector A
B. smaller; fewer fissions in detector A
C. larger; more ionizations in the detector A gas
D. smaller; fewer ionizations in the detector A gas
Show Answer
Answer: D
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