Long Term Cooling

Question 1

Six methods for providing alt AFW supplies
Benefits…..
Weaknesses…….

Answer 1

-FWST->AFW suction(gravity fed, min valve, relatively clean water, class 1 components)
-Raw water reservoir->AFW(gravity fed, min valve, relatively clean water)
-MUW Xfr Tnk->AFW(class 1 components, requires vital power to MUW Xfr pumps)
-refill FWST using cond. hotwell (diesel driven portable pump)(long time establish)/ using RWR/ using ASW
……..

Question 2

Purpose, design of long term cooling system?

Answer 2

• maintain plant in HSBY long term(CST runs out)
  (Provide, long term heat sink/ core heat removal)
  -alt means c/d if RHR not avail