INSTRUMENT AIR Flashcards
Components IA-P-4
Operation, load pressure and unload?
Loads 100#
Unload 115#
Components
IA-P-4
Power supply
Controlled from where?
Cooled by?
Powered from 1J 480 V bus
Controoled from CR (remote) or locally
Cooled by SCCW
Components
IA-P-4
Trips (10 of them)
- Low pressure outlet Hi temperature 400 degF
- Hi pressure outlet Hi temperature 428 degF
- Hi pressure inlet Hi temperature 158 degF
- Hi oil temperature 175 degF
- Low oil pressure 20#
- Hi receiver pressure 125#
- Drive motor overload
- Vent fan overload
- Low oil level
- Loss of Control Power
Components
IA-V-2133
Control locations?
In Auto, what pressure will it open?
Open/close/auto control on PL
IN auto, will open (bypass IA-Q-2) when IA pressure is <75 psig
Components
IA/SA cross connect
Manual Isolation valves
Normal position?
Manual isolation valves (IA-V2712) and (SA-V-232)
Normally open to allow IA to supply the SA system
Components
IA-P-1A/B
Power supply
Auto start is what and when?
Powered from 1A/B ES MCC
Auto start locked out on ES/UV
Components
IA-P-1A/B
On loss of SC (all 3 SC pump bkrs open) cooling will be from fire service
What valves, supply from where? Solenoid valves powered from?
SV-V-57A/B (IA-P-1A) and SV-V-58A/B (IA-P-1B)
Backup cooling water to supply valves to IA-P-1A/B (from FS). Solenoid valves powered from respective compressors breaker
Components
IA-P-1A/B
Operation in auto (load and unload pressures)
In hand (load and unload)
In Auto, loads at 95#, unloads at 105# (sensed at receiver)
In Hand (lead) loads at 100#, unloads at 110#
Components
IA-Q-1 Air dryer for IA-P-1A/B
Power supply
1C ESV MCC
Components
IA-V-2104A/B
Automatically open when the local IA header pressure goes down to what pressure to do what?
When local IA header pressure lowers to 85 psig to allow IA-P-1A/B to supply IA system
Components
IA-V-2104A/B
Auto/open/close control for valves where?
IF IA-V-2104A/B auto open, must be closed how?
Auto/open/close control for valves at local panel
If IA-V-2104A/B auto open, must be closed locally
Components
IA-V-2104A/B
Fail position on loss of power or loss of IA
Fails open on both
Components
IA-V-26
Primary to secondary isolation
Auto isolates secondary plant IA form primary header IA IF
Secondary plant header pressure lowers to 60 psig
Components
IA-V-26
Auto/OPEN control where?
Auto restst to what position if system pressure returns to normal?
Auto/OPEN control locally
Auto resets to open position if system pressure returns to normal
Components
IA-V-26
To monitor primary and secondary IA in control room
What PI for aux building air pressure
What PI for trbine bldg air press
IA-PI-222 is for aux bldg press
IA-PI-403 is for turb bldg. air press
Components
IA-V-26
If there is a leak in the TB, IA-PI-222 will what, IA-PI-403 will keep what? when IA-V-26 what?
IA-PI-222 will recover and rise
IA-PI-1403 will continue to lower when IA-V-26 closes
Components
IA-P-2A/B
Power supply
1A/B ES MCC
Components
IA-P-2A/B
Operation
What are the switching valves and auto line up to supply components on lowering IA header pressure of what pressure? Load and unload?
IA-V-1533/1542 BUIA switching valves
Will auto line up to supply components on lowering IA header pressure of 70#
Load at 85#, unload at 115#
Components
IA-P-2A/B
Supplies the following loads on IA-P-2A (5 ish)
FW-V-7A/B, FW-FC-7/8 (FWP recirc control)
· FWP air speed changers
· FW-V-16A/17A
· CO-V-5/7/8/51, CO-LC-8/9 (hotwell level control)
· MS-V-3A/B/C/D/E/F
Components
IA-P-2A/B
IA-P-2B supplies the following loads: (2 ish)
FW-V-16B/17B
Can be lined up to MS-V-4A/B and MS-V-6 (normally isolated)
Components
2 hour air
Normal pressure?
Maintained above what press when RCS > what temp?
Why?!
Normal pressure: 1700- 2250#
Maintained above 1500# when RCS > 250F. at 1500# system can still provide a min of 2 hour of IA to MS and EFW valves under the worst cycling conditions
Components
2 hour air
Operation, what are the switching valves and what they do?
IA-V-1626 A/B 2 hour BUIA switching valves
-Will swap automatically to supply 2 hour air to critical valves at 60# IA header pressure decreasing
Components
2 hour air
When bottle depletes to what pressure what happens?
Depletes to 60#
IA-V-1625 A/B will open automatically to vent remainder of bank to atmosphere
All applicable valves will fail safe
Components
2 hour air bank
Supplies the following loads (A Bank) (4 ish)
How many bottles?
EF-V-30A/C
MS-V-4A
MS-V-6/PC-5
RR-V-6
9 bottles
Components
2 hour air bank
Supplies the following loads (B bank) (3 ish)
How many bottles?
EF-V-30B/D
Ms-V-4B
MS-V-6/PC-5 (normally isolated from B bank, backup only
7 bottles
Components
IA-P-3
Purpose
Power supply
Manually operated to fill 2 hour air bank
Powered from 1A SB H&V MCC
Components
SA-P-1A/B
Power supply
Cooled by what?
A loads and unloads setpoint
B loads and unloads setpoint
1C/D TP MCC
Second closed
SA-P-1A loads at 90#, unloads at 100#
SA-P-1B loads at 85#, unloads at 95#
Components
SA-P-1A/B
Automatically shuts down if?
If started from where compressor will run continuously loaded?
What pressure relief valve on receiver controls pressure?
Auto shuts down if running unloaded > 5 mins
If started from CR compressor will run continuously loaded
120# relief valve on receiver will control pressure
Components
IA-V-1 (cross tie from SA to IA)
Auto isolates SA header from IA header if pressure lowers to what press?
Lowers to 80 psig
Components
IA-V-1 (cross tie from SA to IA)
Allows SA-P-1A/B to supply IA system
Auto resets for what purpose?
Auto resets to closed position if system pressure returns to normal
Big Summary
IA-P-2A BUIA to
CO-V-5
CO-V-7
CO-V-8
CoV-51
CO-LC-8/9
CO-V-5 (booster pump recirc to condenser)
CO-V-7 (normal makeup to condenser)
CO-V-8 (emergency makeup to condenser)
CO-V-51 (powdex bypass)
CO-LC-8/9 (hotwell level control)
Big summary
IA-P-2A BUIA to:
FW-FC-7/8
-FW-V-7A/B
- FW-V-16A
- FW-V-17A
- FWP A/B
-FW-FC-7/8 (FW-V-7A/B flow controllers)
-FW-V-7A/B (MFW pump recirc)
- FW-V-16A (FW Startup Regulating valve)
- FW-V-17A (FW Regulating valve)
- FWP A/B Air Speed Changers
AOP 28 Loss of IA
All of the following:
OTSGs providing RCS heat removal
At least one 4160V bus is energized
At 60 psig what do you manually have to do?!
Trip the reactor, not automatic you must manually trip the reactor
Big summary IA-P-2A BUIA to
One more valve(s)!
MS-V-3A/B/C/D/E/F
MS-V-3A/B/C/D/E/F (turbine bypass valves)
Big Summary
IA-P-2B BUIA to
FW-V-16B
FW-V-17B
FW-B-16B (FW startup regulating valve)
FW-B-17B (FW regulating valve)
Big summary
2 hour instrument air
A bank (west bank)
MS-V-4A
EF-V-30A/C
RR-V-6
MS-V-6
MS-V-4A (atm dump valve)
EF-V-30A/C (EFW reg valve)
RR-V-6 (RBEC press regulating valve)
MS-V-6 EF-P-1 steam supply pressure reg valve
PC-5 (EF-P-1 stm supply press controller)
Big summary
2 hour instrument air
B bank (east bank)
MS-V-4B
EF-V-30B/D
MS-V-6
MS-V-4B (atm dump valve)
EF-V-30B/D (EFW reg valves)
Normally isolated via IA-V-1632 to prevent blowing down both 2 hr banks (common mode failure)
MS-V-6 (EF-P-1 stm supply press reg valve) pc-5(ef-p-1 stm supply press controller0
Limits and precautions
IA-Q-1
What should be done if the dewpoint exceeds what temp (c)?
If dewpoint exceeds 40 C (in the positive direction), have mechanical maintenance verify proper operation of the air dryers
Limits and precautions
IA-P-2A/B
Rps setpoints and how that works (2 out of 4 logic, if cabinet is in manual bypass)
EFW, including HSPS set points
What actuates EFW, all rcps, 4# etc.
Main feedwater isolation doesn’t start EFW. Need to know EFW. Where will EFW control, all 25” s/u range, rcps is 50%. L
Limits and precautions
IA/CW x connection: where does the x connection exist between the IA and CW? What is the purpose?
X connection path exists between IA and CW through the Amertap dp instruments (CW-DPS-498A/B). ensure proper isolation is provided when depressurizing IA upstream of these instruments to prevent CW from backflowing into the IA system
When the control room selector switch for IA-P-1A/B is in START or Normal AFTER START position the what is bypassed and receiver safety valve will lift at what pressure?
The unloader solenoid is bypassed and receiver safety valve will lift at 120 psig.
Compressors should only be operated from where under emergency conditions?
Control room
Both A and B trains of 2 hour BUIA must be pressurized and inservice prior to exceeding what temp in RCS?
250F
If IA-Pi-1010/1009 indicates < what pressure due to an isolated or depleted bottle bank, switching valve IA-V-1625 A/B will be in a position to bent downstream piping to atmosphere.
<60 psig
In order to restore pressure to IA-PI-1010/1009 it is necessary to temporarly plug the 1” atmospheric vent port of IA-V-1625 A/B until pressure is > than what and valve switches to it’s normal position.
> 60 psig
OP-TM-AOP-028 loss of IA
All of the following must exist: (2)
OTSG providing RCS heat removal
At least one 4160V bus is energized
OP-TM-AOP-028 loss of IA
Any of the following conditions exist: (3)
-Primary IA header pressure < 80 psig (PI-222) and lowering
- Secondary IA header pressure < 80 psig (PI-1403) and lowering
-Report of a major air leak (observed air leak and IA pressure lowering)
OP-TM-AOP-028 loss of IA
IAAT IA pressure is <60 psig
If SI flow> what gpm ensure which valve is open?
If ICCW > what gpm ensure which two valves are open?
ENSURE THE FUCKING WHAT IS WHAT?
If SI flow>22 gpm, MU-V-20 open
If ICCW flow> 550 gpm, IC-V-3/4 OPEN
Ensure the reactor is tripped
