What is the purpose of the reactor plant chilled water system (CDS)?
Reactor plant chilled water system (CDS) supplies cooling for plant spaces, equipment, and personnel.
The Reactor plant chilled water system (CDS) cools the refueling water storage tank (RWST) and maintains a temperature range of 46oF to 48oF during normal operations.
CW also provides radioactive gaseous waste system process vent cooler.
What are the ACUs supplied with Chilled water?
Service Building clean air ACU
Service Building potentially contaminated ACU
Rod control/ MCC area ACU
Where in containment is chilled water supplied from this system?
CTMT air recirculation (CAR) cooling coils
Reactor Coolant Pump (RCP) motor air coolers
Control Rod Drive Mechanism (CRDM) shroud cooling coils
Neutron Shield Tank (NSS) Coolers
In the event of a LOP or CIA what components will be supplied with CCP?
2 of 3 CAR coolers and associated Neutron Shield tank coolers (NSS) coolers
What is the refrigeration cycle?
Evaporator –> Compressor –> Condenser –> Expansion Device –>
Why must the oil heater be energized and heat the oil for 12 continuous hours prior to putting it into service?
the oil contains refrigerant. warming it up prior to putting it into service avoids the oil foaming
Does CDS cool the air exiting the RCP motors?
yes
Why is a nitrogen bottle provided for the surge tank?
it provides cover pressure between 7 and 11 psig and to preclude absorption of oxygen into chilled water
Per tech specs what is containment pressure supposed to be?
between 10.6 and 14.0 psia
Per tech specs what is containment temp supposed to be?
between 80F and 120F
Where is the surge tank located?
in the CDS chiller room 51’6”, six feet above the chilled water pumps
