201.01 Reactor Containment Building Flashcards
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Function of RCB
Provides virtually leak-tight boundary to prevent release of fission products to the environment in the event of a LOCA and provides bilogical shielding during normal and accident conditions
Protects RCS from environmental conditions such as earthquake, tornado, etc.
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How are the Personnel and Aux Air Locks kept leak-tight?
Double inflatable seals on two interlocked doors
PAL - electronic and mechanical interlocks
AUX - mechanical interlocks
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How is the Fuel Transfer Tube kept leak tight?
Double gasket flange on RCB side, gate valve on FHB side
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How are the Emergency Sumps kept leak tight?
SI system conatinment isolation valves
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How is the Equipment Hatch kept leak tight?
Flanged with 2 seperate o-rings and a test connection between
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How are the Electrical Penetrations kept leak tight?
69 per unit with inboard and outboard enclosure boxes
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How are Piping Penetraions kept leak tight?
Welded or sealed against a steel liner
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How are RCB Pressure Sensing Penetrations kept leak tight?
sealed bellows inside fluid filled tube
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Function and location of Personnel Airlock
68’ SE Quadrant
Provides leak tight normal access point into RCB.
Double inflatable seals with LCO requirement of 90 psig in IA header for Operability
Leak test of 0.5 psig in 8 hrs, 1.5 psig in 24 hrs
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Function and location of Aux Air Lock
37’ NW quadrant
Alternate access point if PAL inoperable or emergency
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Purpose of Reactor Pedestal
Supports RPV
Serves as support for pipe whip restraint.
Transmits loading from upper internals and seismic loading to the base mat
Located at the center of the RCB 1 ft. off the East-West Center line to ensure crane can reach all of core
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Purpose of Primary Shield Wall
Missile protection for RPV
Biological shielding
As part of the RX pedestal, transmits weight to foundation base mat
Anchorage for pipe restraints
Extends up from RX pedestal to operating floor at elevation 68 ft.
Built integrally with RX cavity walls
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Purpose of Secondary Shield Wall
Provides shielding (radiation and missile)
Isolates RCS from other accessible portions of containment.
Laterally restrains supports for: SGs, RCPs, and PZR.
Safeguards electrical and mechanical systems
Serve as pipe whip restraint supports
Forms the exterior of the primary loop compartments.
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Purpose of Primary Loop Compartment
Contain the primary loops
Primary Shield and Refueling Pool Walls form the interior.
Secondary Shiled Wall forms the exterior.
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Purpose of Refueling Pool
Used during refueling to provide shielded access for transferring new and spent fuel between RPV and transfer tube.
Shielded laydown area for Reactor Vessel Upper and Lower Internals.
Filled with borated water when moving fuel over the RPV flange
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Purpose of Normal and Secondary Sumps
Collects equipment drainage, minor leakage, and condensate.
RCFC coil condensate
RHR and regenerative heat exchangers
RCPs and RCP standpipes
Containment Carbon Units
Radioactive pipe chase
Reactor Vessel Stud hole manifold (19’ Az 135 & 225)
Refueling canal leak chase drains (11’ & 19’ Az 110 & 135) - has an isolation valve
LISA drains (19’ Az 95) – has an isolation valve
Air duct drains (52’-6” near RCP C & D motors) – has an isolation valve
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How does Containment Heat Removal System interface with the RCB
RCFCs (6) and Containment Spray maintain pressure and temp limits
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How does Containment Air Purification and Cleanup System interface with RCB?
Carbon Units used prior to personnel entry following shutdown
HVAC Purge - dilution and purge
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How does Combustible Gas Control System interface with RCB?
Maintain RCB hydrogen <4%
TWO redundant electric recombiners
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How does Component Cooling Water interface with RCB?
Cools RHR HXs, RCP Thermal Barrier HX, and RCFCs
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RCB Design Criteria
Design Pressure : 56.5 psig
Max Accident Analysis Pressure : 41.2 psig
During accident conditions, water level will not reach bottom of Rx Vessel
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Tech Specs associated with Containment
- 3.2 - ESF Actuation System Instrumentation
- 6 - Containment Systems
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Purpose and Indicator Location for
RCB Pressure
Provides Hi-1, Hi-2, and Hi-3 signals
ICS, QDPS, Recorder PR-934, CP-018
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Purpose and Indicator Location for
RCB Radiation
8012/8013 input to SSPS for CVI
8011A (part) RCS Leak Detection
8050/8051 RCB High Range Area Monitor (eplan)
RM-11 or ICS
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Purpose and Indicator Location for
RCB Temperature and Humidity
Indicated on CP002
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Purpose and Indicator Location for
Hydrogen Monitoring
Indicates on QDPS, recorder on CP018
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Purpose and Indicator Location for
Seismic Monitoring
Monitor in U1 Tendon Gallery
Alarms in U1 CR CP-009
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Purpose and Indicator Location for
Containment Sumps
Emergency Sump on QDPS
Normal Sump on CP-004
Secondary Sump on CP-004
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Indicator Location for
Penetrations Monitoring
PAL valves controlled and indicated locally and on CP-005
PAL alarm on CP-005
AAL monitored and alarm on CP-005
