Fire Water System

Question 1

How does a deluge system work in the Fire Water System?

Answer 1

• The water pressure that will go through deluge valve will hold the deluge valve shut at the valve operator
• to activate the system the pressure must be bled off and the deluge valve will open

Question 2

What will actuate the fire water pumps 0-3 and 0-4?

What will actuate the fire water pumps 0-1 and 0-2?

Answer 2

• fire water pressure drops below 140 psig with time delay
  
  • .15 sec 0-3
  • 5 sec 0-4
• fire water pressure drops below 75 psig with time delay

.15 sec 0-1

5 sec 0-2

Question 3

What happens in 15 mimutes after you get a fire detection alarm if you cant prove there is no fire?

Answer 3

site must declare a Unusual Event

Question 4

what components does deluge system protect?

What are the different methods to actuate a deluge system?

Answer 4

• Seal oil skid
• xfmrs
• MFPs
• turbine brngs 2-9
• energize electromagnet bypass valve
• local manual drain valve (xfm only)
• heat actuated device
• close pilot valve, open bell test valve

Question 5

What subsystems exist in fire water system?

What do those subsystems protect?

what is source of water to those subsystems?

Answer 5

Plant Yard Loop

• around main power block
• plant interior loop
  
  • Raw wtr resv
  • patton flats
  • interior loop

Plant Interior system

• inside power block (seismic qual)
• b/u cooling CCP
  
  • yard loop (Raw)
  • FWST (pmp 0-1 , 0-2)
  • ASW/Cond via dies pmps

Patton Flats

• outside power block
• b/u for Plant yard loop
  
  • FWST 0-2 (FWP 0-3, 0-4)

Question 6

What are the jockey pumps (0-1 and 0-2) supplying water to?

Which fire water pumps have feature to lock in contacts and prevent tripping due to electrical logic?

Answer 6

to patton flats (South site fire water system) maintaining pressure ~ 150 psig to prevent cycling of pumps 0-3 and 0-4

FWP 0-1 and 0-2