CHW Flashcards
What is the purpose of the CHW system?
- The system provides 55°F chilled water to containment loads (CLV, CUV, CIR, RCP MAC, S/G BD Hx)
Where does the CHW head tank get its makeup water from?
Demin Water (normal) NESW (alternate)
What will happen if you select DISABLE on the HMI?
It will shutdown the entire system
What is the normal power supply to Unit 1 & U2 CHW System?
Units cross tied to transformer 10
What is the alternate power supply to U1 and U2 CHW system?
Livingston Rd
What is the lower containment tech spec required bulk temperature
≥ 60° ≤ 120°
What is the upper containment tech spec required bulk temperature
≥ 60° and ≤ 100°
What pressure must be maintained according to LCO 3.6.4 (Containment Pressure)?
≥ -1.5# ≤ +0.3# (Modes 1-4)
What does TS LCO 3.6.4 A(Containment pressure) state?
If containment # is not within limits:
-WITH IN 1 HR
Restore containment pressure to within limits
What’s the warmest NESW (lake temperature) the plate hx can handle and still keep chw inlet temp to cnt at 55°?
53°
What are the CHW pump starts
Manual
Chiller & Pump Package Trip
What are the CHW pump trips
No Flow
Chiller trip
What is the source of control power for CHW system
48 VDC (1 per unit) w/ battery backup
What happens on a loss of CHW
Evaluate the system and if it cannot be restored expeditiously then start a containment pressure relief, perform swap to open loop, and disable chiller auto start.
