Refer to the drawing of a reactor vessel (RV) differential pressure (D/P) level detection system (see figure below).
The reactor vessel is supplying steam at normal operating temperature and pressure, and the level instrumentation has just been calibrated.
Which one of the following events will result in a vessel level indication that is lower than actual level?
A. RV saturation pressure increases by 50 psi.
B. Actual RV water level decreases by 6 inches.
C. The external pressure surrounding the D/P detector decreases by 2 psi.
D. The external temperature surrounding the reference leg increases by 20°F.
Show Answer
Answer: A
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