A major leak in the instrument air system occurs.
What would first cause a reactor trip?
loss of feed water control will cause lo-lo SG level
12% power during S/U. Power range NI lower detector fails high.
What will automatically occur?
all S/G levels will increase
What describes two functions of the P-4 train “A” permissive interlock?
arm steam dumps and close main feed water reg and bypass valves
60% power
steam dumps in auto in Steam Pres MODE
both TDMFP in service
main steam header pressure instrument fails high
Which describes the initial response of the plant to the failure?
feed pump speed will increase. Steam dumps will open
How is the steam generator water level control system functioning to maintain steam generator water level?
main feed reg valves automatically adjust to maintain SG water level
A main streamline pressure transmitter provides density compensation for a streamflow instrument fails low.
With this failed low density input, how will the steam flow indication change?
will indicate lower than actual
How is main feed water pump speed automatically controlled?
TDMFP controlled to maintain programmed DP across the main feed reg valves
Plant at 100%, transient occurs, COP reports:
Tave is 2F above program temp
pressurizer 3% above program level
pressurizer pressure is 2270 and decreasing
all SG NR levels 40% and increasing
What parameter is currently outside of the band assumed by safety analysis?
SG NR level
Plant at 1%
Pressurizer Pressure Deviation lit
2225 psia
seal injection flow 39 gpm
Stop Valve C Accumulator Pressure Lo lit
“C” feed CTV pressure is 4700 psig
“B” feed water isolation valve OPEN
Which of these conditions requires entry into Tech Spec LCO?
Feed CTV accumulator pressure entry into CTMT Isolation Valves
