Term
HVAC
Describe fans with heating coils trip setpoint. |
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Definition
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Term
HVAC
Describe the stages of a typical V-AC unit. |
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Definition
-Double inlet dampers (2 for secondary containment).
-Roll-o-matic filters.
-Cooling coil.
-Face and bypass dampers.
-Heating coil.
-Temperature element.
-Fan. |
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Term
HVAC
Describe the purpose of the HVAC syste. |
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Definition
-Control environmental conditions for equipment and personnel.
-Controlled flow and release.
-Flow path is always low areas to higher radioactive areas. |
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Term
HVAC
Describe the main supply fans. |
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Definition
-Known as the 10 fans (V-AC-10A/B).
-Normally both run.
-Have cooling coil trip.
-Trip on loss of Rx building exhaust fans (V-EF-24A/B).
-Supply lower areas in the Rx building.
-Powered by MCC-111/141.
-Exhaust into plenum. |
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Term
HVAC
Describe the concern with a loss of the main supply fans. |
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Definition
| High steam chase temperature causing a Group I isolation. |
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Term
HVAC
Describe the Rx building exhaust fans. |
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Definition
-Know as the 24 fans (V-EF-24A/B).
-Normally 1 fan runs.
-Powered by MCC-111.
-RWCU discharges into suction of 24 fans.
-Exhaust into plenum. |
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Term
HVAC
Describe normal pressure in Rx building. |
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Definition
| -Negative 0.25" H2O as compaired to atmosphere. |
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Term
HVAC
Describe the normal pressure in the exhaust plenum. |
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Definition
| -Maintained at negative 0.5" H2O compaired to outside air. |
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Term
HVAC
Describe the plenum exhaust fans. |
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Definition
-(V-EF-20/21/22).
-Powered by MCC-132/132/122.
-Exhaust fans to Rx building vent stack.
-Fans are modulated to maintain exhaust plenum pressure. |
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Term
HVAC
Describe the exhaust plenum rad monitor setpoint. |
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Definition
| 26mrem/hr or downscale of .1mrem/hr. |
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Term
HVAC
Describe the refuel floor fans. |
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Definition
-Known as the 4 fans (V-AH-4A/B)
-Powered by MCC-132/122).
-Normally only 1 fan running.
-Trips on loss of refuel exhaust fan (V-EF-28).
-Safety related dampers fail closed on loss of air. |
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Term
HVAC
Describe the refuel floor rad monitor setpoint. |
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Definition
| 50mrem/hr or downscale of .1mrem/hr. |
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Term
HVAC
Describe the refuel floor exhaust fan. |
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Definition
-Known as the 28 fan (V-EF-28).
-Powered by MCC-132.
-If running and 4 fan is in auto, when flow is sensed the 4 fan will start.
-If lost the 4 fan will trip.
-Exhaust into plenum. |
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Term
HVAC
Describe the sample station exhaust fan. |
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Definition
-(V-EF-10).
-Powered by MCC-132.
-Exhausts into plenum. |
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Term
HVAC
Describe the rad waste vent line. |
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Definition
-Rad waste exhaust fans.
-Has 2 fans in rad waste (V-FU-1/2).
-Powered by MCC-111/141.
-Has heating coil trip.
-Discharges into plenum.
-Maintains rad waste at -0.25" H20.
-Interlocked with rad waste supply fans (V-MZ-3A/B). |
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Term
HVAC
Describe the cross-connect between 28 fan inlet and SBGT. |
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Definition
| -Damper opens (V-D-42) pens to connect duct on V-EF-24/28 together for SBGT operations. |
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Term
HVAC
Describe the HPCI room alarms. |
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Definition
High temp: 97F.
Low temp: 65F. |
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Term
HVAC
Describe Rx building temp alarm. |
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Definition
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Term
HVAC
Describe the ECCS room temp alarms and cooling supply. |
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Definition
-100F.
-SW is normal supply with ESW as b/u. |
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Term
HVAC
Describe the RCIC room temp alarm. |
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Definition
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Term
HVAC
Describe the CRD pump room temp alarm and control. |
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Definition
-Alarms at 104F.
-Sw starts at 85F, second starts at 90F. |
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Term
HVAC
Describe recirc MG set room fans. |
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Definition
-(V-SF-3/4).
-Powered by MCC-133/122.
-Modulate to keep room at .25" H2O positive pressure. |
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Term
HVAC
Describe the sludge tank vent filter unit. |
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Definition
-Vent for RW tanks:
-Condensate phase, clean-up phase, spent resin, waste sludge. |
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Term
HVAC
Describe the SJAE fan. |
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Definition
-Known as the 26 fan (V-EF-26).
-Suctions from SJAE room exhaust to plenum and dilution air for SBGT.
-Normally runs.
-Powered by MCC-132.
-On SBGT initiation damper to SBGT isolates and directs to plenum. |
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Term
HVAC
Describe the cond/demin MVP room fan. |
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Definition
-Known as the 11 fan (V-EF-11).
-Powered by MCC-132.
-Normally runs.
-Suctions from cond/demin MVP room and exhausts to plenum or SBGT dilution air.
-SBGT initiation damper isolates to SBGT and aligns to plenum. |
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Term
HVAC
Describe the turbine building fans. |
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Definition
-(V-AH-1/2).
-Neither fan normally ran.
-Powered by MCC-121/142B.
-Both start when ceiling temp reaches 250F.
-At -0.2"H2O in plenum the fans trip and plenum room ceiling dampers shut. |
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Term
HVAC
Describe the EDG fans. |
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Definition
-(V-SF-9/10).
-Powered by 12EDG/11EDG.
-Start when EDG start signal or when bus is energized.
-EDG building suction dampers open then discharge shut and vice versa. |
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Term
HVAC
Describe the recombiner building exhaust fans. |
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Definition
-(C-1004A/B).
-Located in MVP room.
-Discharge to plenum.
-Fans trip on exhaust plenum press of -0.2"H2O. |
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