E51 - RCIC Flashcards
When will the min flow valve auto open? and when will it auto close?
> 125 psig AND < 95 gpm OPEN
> 175 gpm CLOSED
What are the RCIC turbine throttle trips? (trips the trip/throttle valve)
SOMIE
Suction pressure low > or equal to 6.5”hg (electrical)
Overspeed – approximately 5520 RPM (120%) (mechanical)
Manual PB (Electrical)
Isolation (group 4 isolation) Div 1 OR div 2 signal (Electrical)
Exhaust pressure high (turbine exhaust) > or equal to 25 psig (Electrical)
and also the local trip lever (mechanical)
What pump will swap to suppression pool on high level first, RCIC or HPCS?
RCIC
How does the Gland Seal Compressor respond to a LOCA?
Trips on Div 1 ECCS initiation,
When signal resets, compressor will auto restart
If level is < -41.6”, AND RCIC gland seal compressor H/S has been taken to stop.
If level is >-41.6” it should manually be started if RCIC is running
When will the RCIC steam line warmup valve F076 close?
Group 4 isolation
When does the F063 and F064 Steam Supply inboard and outboard isolation valves auto close?
Group 4 isolation
When does the RCIC Steam supply drain trap bypass auto open?
Steam supply drain pot level is high
What is the normal position of all drain valves?
open
when will the drain valves change position?
Closes when the F045 is Not Full closed
when can the drain valves be opened?
Can only be opened if F045 is full closed
how do drain valves fail on loss of power?
Fail closed
Can the gland seal compressors be secured if an actual initiation signal is present?
NO
What light indication is available from the P150 panel of the trip/throttle valve?
Motor position only! not actual valve position.
What flow does the Min/flow restrict flow to? and where does it discharge to?
90 gpm to the suppression pool
where does RCIC Turbine Exhaust to?
Suppression Pool
What is the logic for closing RCIC inj valve on level 8?
B and A at +53.5”
Closes F045, which closes F013 injection valve.
How does the F077, F078, and F068 respond to a group 9 isolation?
When can they be reopened?
Close on group 9
77 and 78 require BOTH signals clear
F068 only requires one signal to be clear
How do you reset a RCIC trip?
Take trip throttle valve closed and then back open
What is the indication of an electrical trip? TTV
After reset, one green light and one red light
what is the indication of a mechanical trip? TTV
Both lights are green
What is indication that all trips are clear, TTV
both lights red
What signals initiate RCIC?
Arm and depress manual P/B OR
-41.6” wide range
When does RCIC isolate?
+53.5” Rx Level Narrow Range
Where does RCIC inject into the RX?
“B” Feedwater line
Where does RCIC steam come from?
“A” main steam line, upstream of the MSIV
What RPM should RCIC turbine stay above?
why?
> 2,000 rpm
at <2,000 rpm, pump is not able to:
1) provide adequate oil pressure for turbine bearing lubrication and for governor actuator control oil.
2) chattering of the turbine exhaust check valve
Where does RCIC get its primary and backup suction from?
CST, backup is suppression pool
how many gallons in CST are reserved for RCIC and HPCS?
and what else can CST do?
170,000 gallons
Return path for testing purposes
what is the supervisor showing?
stem position
what is the trip throttle valve light showing
motor position
what is the purpose of the turbine exhaust vacuum breakers?
prevent drawing a vacuum in RCIC turbine exhaust line following RCIC operation
purpose of the gland seal compressor?
provides compressed air to turbine glands to prevent steam leak into RCIC room
purpose of the lube oil system?
supplies lubricant for turbine bearings and makeup oil for hydraulic mechanical actuator of the RCIC turbine governor system
purpose of the governor?
limits turbine speed to maximum valves and positions governor valve to maintain constant pump discharge flow over the full pressure range of operation
what should be done if RCIC injection in mode 1?
Enter loss of Feedwater heating ONEP
How long must test switch remain in test after valve stroke is complete?
30 seconds
when will the manual isolation pushbutton work?
only after manual or automatic initiation is sealed in
what happens on initiation sequence?
immediately:
Open signals to F095, F010, F046
Close signals to F022, F029 (CST return valves)
Start signal to gland seal compressor. Div 1 manual isolation logic enable
After 6 second TD:
open signals to F045, F013
F095 Closes on F045 Full open
what pressure can RCIC inject into the RX?
165 to 1192 psia
what’s the purpose of the turbine exhaust rupture disk?
protects the turbine casing and exhaust piping from overpressurization due to exhaust blockage
When will the RCIC vacuum breakers auto close?
Group 9
What closes on a turbine trip?
Trip throttle valve
How do you reset a turbine trip?
Take TTV closed, then open.
check lights to see what type of trip it is
What is the normal position of F068, RCIC turbine exhaust to suppression pool?
Open
When will F068, RCIC turbine exhaust to suppression pool, auto close?
When can it be reopened?
What will NOT occur if F068 closed?
< 60 psig Rx AND 1.39 psig drywell pressure (group 9)
Can be reopened if EITHER of the above signals clear
If F068 is closed, The F095 or F045 will NOT open
When will the Test return to CST auto close? (Inboard and outboard)
if F031 full open (suppression pool suction)
what are the AC valves for RCIC with Power Supplies?
63 16B31 64 15 76 16 77 15 78 16
What cools RCIC room ventilation system?
SSW A
How do Air operated valves fail for RCIC?
Closed, It also results in a loss of test return line back to CST
When does the CST Suction F010 get open signal?
Auto open on initiation IF F031 is NOT full open (Supp pool suction)
When will CST Suction F010 auto close?
Auto closes if F031 full open (Supp pool suction)
When can the CST Suction F010 be opened or closed?
Any time from either panel, BUT when travel complete, it will reposition if demand signal is present.
When will F031, Supp pool suction valve AUTO OPEN?
<4’ CST or >18’9” suppression pool
When will F031, Supp pool suction valve AUTO close?
Group 4 isolation
What rpm does RCIC turbine trip?
5520
what is the power supply to the gland seal compressor?
1DA2
power supply to the RCIC Turbine Supply Governor Control?
11DA
How does the Governor fail on loss of power?
Open, which causes an overspeed trip so you can reset trip and run RCIC turbine by manually throttling trip throttle valve
When will RCIC swap from CST to supp pool suction?
<4’ CST or >18’9” Suppression pool
What happens if the F045 doesn’t open? and what speed will RCIC be at?
Ramp Generator won’t start
Governor will be OPEN
Speed will be around 2,000 rpm
Is the RCIC Governor normally closed or normally open?
Open
When will the RCIC Governor throttle?
Throttles on F045 coming open
When will the steam supply F045 Auto open?
on initiation IF F068 full open AND <53.5” Rx level
When will steam supply F045 Auto close?
> 53.5”
Where can F045 be opened from with >53.5” Rx Level?
P150 (no interlocks)
Where can F045 be opened from with F068 (RCIC turbine exhaust to Supp pool) open?
Nowhere!! ???? Should it say the 68 closed..?
What is the normal RCIC Test Return FCV to CST position?
Position 2
When will the Inj Valve F013 Auto open?
Initiation signal if F045 AND TTV not full closed
when will the inj valve F013 Auto close?
Auto close if TTV or F045 Full closed
