Containment Spray Flashcards
CS add tank empty alarm:
Empty alarm and 125VDC status lights at 11.0%
To close CS019s spray add to eductor valve:
Reset CS signal
Manually close CS019s
Formula for keeping iodine in solution
I2 + 2OH- =>I- + IO- +H2O
Operation design basis:
System designed to deliver:
- Between 30-36% by weight NaOH solution to form a 8.0-10.5 pH solution when combined with RCS leakage and all RWST water. pH control minimizes effect of chloride and caustic stress corrosion.
- System will satisfy design requirements with one eductor and both CS pumps operable.
Safety design basis:
- Reduce pressure in containment atmosphere at a rate to prevent exceeding design leak rate.
- Removed sufficient iodine from containment atmosphere to limit site and offsite boundary doses below CFR requirements.
- Components (except test/recirculating lines) are safety Cat 1 and quality group B.
- Components protected from missiles that could be generated by a LOCA.
- Ring header and risers are designed for Safe Shutdown earthquake.
The Hi-3 bistables for CS are ______to actuate to prevent inadvertent CS actuation on a _______to the bistable. These are _______by taking the bistable to _______. If one is bypassed, coincidence changes from ____ to _____.
Energized Loss of power Bypassed Test 2/4 2/3
Swap CS pump suctions from ______ to _______ at RWST level of _____. Secure pumps if RWST is ______.
RWST to Containment sump
12%
9% and still the suction source
pH control minimizes the effect of _____ and ______ corrosion.
Chloride and caustic stress corrosion
Design flow of A CS pump is ______ and B CS pump is _____with containment pressure of ______.
3415 GPM
3925 GPM
50 psig
CS010A/B is the ______ and auto opens on a _______. This valve fails _____on loss of IA.
Eductor isolation valve; CSAS signal
Fails open on loss of IA
CS019A/B are the _____ and auto open on ______. These are _____ operated valves. Flow rate from the spray add tank is approximately ______.
Spray add tank isolations
CSAS
Motor
55-60 GPM
CS007A and B are the _______ and auto open on ______.
Containment spray isolations going to containment
CSAS signal
If either CS007A/B or CS019A/B are not open within _______ of ________, an alarm will sound in the _____.
30 seconds
CSAS
MCR
Initiation of CS signal, what happens? 4 items
- CS007A/B opens
- CS019A/B open
- CS pumps start only when the CS019A/B valves are open
- CS010A/B gets a confirmatory open signal
CS actuation signals:
- Cntmt Hi-3 pressure (>20# 2/4)
2. Manual (2/2 @ 1/2 locations)
CS termination criteria
- Containment pressure <15 psig
2. RCS LOCA only: Operating >8 hours -and- Spray tank Lo-2 lights lit. (11%)
Conditions for CS pump to auto start
- CS in after trip or after close
- CS019A/B open spray add isolation
- CSAS signal
To manually start CS pump
- CS to close
- CS009A/B open
- SI8811A/B open
LCO 3.6.6
3.6 CONTAINMENT SYSTEMS
3.6.6 Containment Spray and Cooling Systems
LCO 3.6.6 Two containment spray trains and two containment cooling
trains shall be OPERABLE.
APPLICABILITY: MODES 1, 2, 3, and 4.
Spray add tank parameters per 3.6.7
> =78.6% and <= 90.3%
Verify spray additive tank sodium hydroxide
solution concentration is >=30% and <= 36%
by weight.
Valves in flowpath locked or secured in correct position
and go to correct auto position on an actual or simulated signal.
CS007A/B can not be opened unless_______.
Pump breaker has been open for >30 seconds
Which panel in MCR can CSAS be reset?
PM05J
If CSAS was reset at 25 psig, auto CSAS is blocked. What rearms CSAS?
Going below 20 psig will rearm
CS Pump Test Start?
_CS007A/B Spray Hdr Isol closed
_SI001A/B RWST open
CS040A/B Spray Add Tk Isol closed
How can _CS019A/B be manually opened? Auto opened?
Switch to TEST and C/S to open
Auto opens on CSAS Signal
If 1CS007A is INOPERABLE, what Tech Spec(s) apply?
LCO 3.6.3 Condition A and LCO 3.6.6 Condition A.
Eductor flow rate is _______ and is/is not included in the total flow from each pump. Each spray nozzle delivers _____ gpm.
130 GPM and is included
15 GPM
If CS-019A/B inop, TSAC ____ and _____ because spray add wont function and CS pump wont start because of interlock.
If CS-010A/B inop, TSAC______ because spray add wont work.
If CS007A/B inop, TSAC ____ and _____ because isolation valve and only the support system inop.
- 6.6 and 3.6.7
- 6.7
- 6.3 and 3.6.6
List required components of CS system
2 pumps 1 Spray Additive Tank 2 eductors 6 spray rings and associated nozzles 2 containment recirc sumps 1 Refueling Water Storage Tank Piping and associated valves
List the following flow rates during system operation:
a) Spray headers, b) Pump discharge flow to eductor, c) NaOH to eductor.
a) Spray headers: Train A 3285; Train B 3795
b) Pump discharge flow to eductor 130 gpm (each)
c) NaOH to eductor 55 gpm (each Train)
The Containment Spray System has six spray rings. Which rings belong to Train A and Train B?
Train A = rings 1, 3, 5
Train B = rings 2, 4, 6
