PZR pressure tree Flashcards
1
Q
PZR tree
2235
A
Spray valves full closed
(NOP)
2
Q
PZR tree
2250 (+15)
A
Proportional Heaters Full off
3
Q
PZR tree
2260 (+25)
A
Spray valves start to open
4
Q
PZR tree
2285 (+50)
A
When coming down in pressure spray valves start to close
5
Q
PZR tree
2310 (+75)
A
Spray valves Full open (High pressure alarm)
6
Q
PZR Tree
2335 (+100)
A
PORV open
7
Q
PZR tree
2376
A
Reactor Trip
8
Q
PZR tree
2485
A
Safety Valves open
9
Q
PZR tree
2735
A
Safety Limit
10
Q
PZR tree
2220 (-15)
A
Proportional heaters fully on
Back up heaters turn off
11
Q
PZR tree
2210 (-25)
A
Backup Heaters come on
12
Q
PZR tree
2185 (-50)
A
Low Pressure Alarm
13
Q
PZR tree
2000
A
SI Block Premissive
Power Operated Reliefs close
14
Q
PZR tree
1844
A
Reactor Trip
15
Q
PZR tree
1715
A
Safety injection
16
Q
whats the difference between the PORV setpoints?
A
2335 opens PCV-456
2340 opens PCV-455C
