DW DS

when does the DW transfer pump auto start?

starts on a low discharge pressure of 96 PSIG (may cause a high pressure alarm in the MCR)

what trips the DW pumps?

DWST lo-lo level 4ft 2 in

what causes a DW system trouble alarm?

HI/LO DW header pressure (91 PSIG/ 122 psig)

HI/LO DWST level

DW transfer pump not in auto

where can DW be supplied from if DWST is out of service?

supplied form WRF but will be at a lower pressure

how is DS supplied to the units?

two PCV’s (500/502)

what does the control building have in the basement for DS?

has a back flow preventer in the basement

what are some loads on DS?

Essential spray pond makeup source

quench water in the blowdown stack

FP tanks

air compressor cooling when TC not available