A nuclear power plant has been shut down for one month.
A portable gas-filled radiation detector is needed to monitor shutdown reactor core neutron level from a location outside the reactor vessel.
The detector must be able to distinguish between ionizations caused by gamma and neutron radiation.
Which region(s) of the gas-filled detector characteristic curve is/are acceptable for operation of the detector?
A. Geiger-Mueller, Ion Chamber, and Proportional regions are all acceptable.
B. Proportional region is acceptable, and Ion Chamber region also may be usable.
C. Ion Chamber region is acceptable, and Geiger-Mueller region also may be usable.
D. Geiger-Mueller region is acceptable, and Proportional region also may be usable.
Show Answer
Answer: B
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