Refer to the drawing of a reactor vessel (RV) differential pressure (D/P) level detection system (see figure below) that was recently calibrated at normal operating conditions.
With the reactor shut down, RV pressure was inadvertently decreased from 1,000 psig to 500 psig in 5 minutes due to operator error. RV pressure was stabilized at 500 psig, but during the pressure decrease a small amount of water in the condensing chamber flashed to steam.
Assume the reference leg water remained subcooled, except for the small amount of water that flashed to steam in the condensing chamber.
As a result of the small loss of condensing chamber water, RV level will indicate __________ than actual level; and as the condensing chamber refills, indicated level will __________.
A. higher; decrease and stabilize above the actual level
B. higher; decrease and stabilize below the actual level
C. lower; increase and stabilize above the actual level
D. lower; increase and stabilize below the actual level
Show Answer
Answer:A
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