Containmentcacs

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skrappie1
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112637
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Containmentcacs
Updated:
2015-12-07 13:09:04
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containment cacs advanced systems
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containment/cacs
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  1. What is the containment temperature limit?
    • Modes 1-4
    • -admin limit
    • --</= 135.96oF on the PPC
    • --130oF if using TI-1815 on C-13
    • -this prevents exceeding the design pressure with resultant peak pressure after a DBA or steamline break accident
  2. LCO 3.6.1: Containment
    LCO 3.6.1: Containment shall be operable

    APP: Modes 1-4

    • Actions:
    • A. containment inoperable
    • --restore containment to operable status-within 1 hour
  3. LCO 3.3.6. Refueling containment high radiation (CHR) instrumentation
    LCO 3.3.6: 2 refueling CHR automatic actuation function channels and 2 CHR manual actuation function channels shall be operable

    APP: During core alterations, during movement of irradiated fuel assemblies with in containment

    • Actions: One or more functions with 2 channels inoperable
    • -suspend core alterations-IMMEDIATELY AND
    • -suspend movement of irradiated fuel assemblies within containment-IMMEDIATELY
  4. Containment refueling monitors RIA-2316/2317
    • Setpoint 80 mR/hr
    • Energized/calibration prior to core alterations
    • Cutout keyswitch in/out
    • 1/2 high alarm logic initiates containment isolation
  5. LCO 3.9.3 Containment penetrations
    actions for 1 or more containment penetrations not in required status
    • A.1 suspend core alterations-IMMEDIATELY AND
    • A.2 suspend movement of irradiated fuel assemblies with in containment-IMMEDIATELY
  6. LCO 3.6.4 Containment pressure
    LCO 3.6.4: Containment pressure shall be </= 1.0 psig in Modes 1 and 2 and </= 1.5 psig in Modes 3 and 4

    APP: Modes 1-4

    • Actions:
    • A. containment pressure not within limits
    • -restore containment pressure to within limits-1 hour
  7. LCO 3.6.6. Containment cooling systems
    LCO 3.6.6: 2 containment cooling trains shall be operable

    APP: Modes 1-3

    • Actions:
    • C. less than 100% of the required post accident containment cooling capability available
    • -enter LCO 3.0.3.-IMMEDIATELY
  8. What is the containment pressure administrative limit?
    • Modes 1 and 2
    • -<.85 psig
    • Modes 3 and 4
    • -<1.35 psig
    • Ensures during an accident that the maximum design pressure of 55 psig is not exceeded
  9. LCO 3.6.2: Containment air locks
    Actions for 1 or more containment air locks with containment air lock interlock mechanism inoperable
    • Notes: required actions B.1,B.2,and B.3 are not applicable if both doors in the same air lock are inoperable and condition C is entered
    • -entry and exit of containment is permissible under the control of a dedicated individual
    • Action:
    • B.1 verify an operable door is closed in the affected air lock- 1 hour
  10. LCO 3.6.3. Containment isolation valves
    LCO 3.6.3: Each containment isolation valve shall be operable

    APP: Modes 1-4

    • Notes: Penetration flow paths, except for the 8 inch purge exhaust valves and the 12 inch air room supply valves penetration flow paths, may be unisolated intermittently under administrative controls
    • -seperate condition entry is allowed for each penetration flow path
    • -enter applicable conditions and required actions for systems made inoperable by the CIV's
    • -enter applicable condition and the required actions of LCO 3.6.1 containment when leakage results in exceeding the overall containment leakage rate acceptance criteria
  11. LCO 3.6.5. Containment air temperature
    LCO 3.6.5.: Containment average air temperature shall be </= 140oF

    APP: Modes 1-4

    NO </= 1 HOUR ACTIONS
  12. What are the containment air cooler fan power supplies?
    • LCC-12 (V-1A,2A,3A)
    • LCC-11 (V-4A)
    • MCC-3 (V-1B,2B,3B)
    • MCC-4 (V-4B)
  13. What is the amber light on the V-4A handswitch?
    • Standby light
    • -not used
  14. Containment air cooler air filters
    • Flow: 60,000 scfm
    • Pressure drop: 0.15 psid
    • Maximum particle size: 0.3 microns
  15. What is CV-0869, VHX-4 inlet valve, equipped with?
    It has a needle valve in the air supply to set the stroke time (closed to open) to approximately 12 seconds (slowly opens the valve)
  16. CAC recirc fans
    • 2 fans in each unit (verticle vane axial)
    • -A fans-75HP
    • -B fans-30HP
    • The higher HP A fans are required due to the increased air density following a DBA
    • They have gravity operated dampers on the fan discharge to prevent short circuiting the air to the inlet when only 1 fan is operating
    • V-4A is not safety related
  17. What must you do when all the CAC high capacity outlet valves are open and the critical service water header pressure is <50 psig or service water discharge pressure is <53 psig?
    • You must start the 3rd service water pump
    • -ensures adequate cooling
    • -prevents pump runout
  18. Containment air coolers
    • Heat transfer capacity; .495mbh/coil
    • Maximum inlet temperature 283oF (shell) 85oF (tube)
    • Operating flow(tubes): 400 gpm/coil
    • Operating air flow: 15000cfm/coil
    • Cooler sump drains to the containment sump
    • -drains are sized for 20 gpm
    • -flapper blade drain is sized to pass 150gpm, it is held closed due to the fan suction until water level rises to the alarm setpoint
    • 4 coil banks/cooler
    • Large blowout panel blows out at 1 psig
  19. What happens to the containment air cooling system on a SIAS?
    • A fans remain operating
    • B fans trip
    • VHX-1,2,3,4 8" service water outlet valves open
    • VHX-4 inlet valve closes
  20. LCO 3.6.6 Containment Cooling Systems, 100% post accident cooling
    100% of the required post accident cooling capability can be provided with both MSIV bypass valves closed if either:

    1. Two containment spray pumps, and two spray headers are OPERABLE, or

    2. One containment spray pump, two spray headers, and three safety related CACs, are OPERABLE (at least two service water pumps must be OPERABLE if CACS are to be relied upon).

    100% of the required post accident cooling capability can be provided for operation with a MSIV bypass valve open or closed if either:

    1. Two containment spray pumps, two spray headers, and two safety related CACs, are OPERABLE (at least two service water pumps must be OPERABLE if CACS are to be relied upon).

    2. One containment spray pump, one spray header, and three safety related CACS are OPERABLE (at least three service water pumps must be OPERABLE to provide the necessary service water flow to assure OPERABILITY of the CACs).

    If the Containment Spray side (tube side) of SDC Heat Exchanger E-60B is out of service, 100% of the required post accident Cooling capability can be provided, if other equipment outages are limited.  One hundred percent of the post accident cooling can be provided with the Containment Spray side of SDC Heat Exchanger E-60B out of service if the following equipment is OPERABLE: 3 safety related CACs, 2 Containment Spray Pumps, 2 spray headers, CCW pumps P-52A and P-52B, 2 SWS pumps, and both CCW Heat Exchangers, and if

    1.  One CCW Containment Isolation Valve, CV-0910, CV-0911, or CV-0940, is OPERABLE, and

    2.  Two CCW isolation valves for the non-safety related loads outside the containment, CV-0944A and CV-0944 (or CV-0977B),are OPERABLE.

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