HR- Radwaste HVAC Flashcards
What are the functions of the Radwaste Building HVAC system?
maintain ventilation in the process equipment areas
provide personnel safety in access areas
restrict the spreading of airborne radioactivity
What portion of the Radwaste Building HVAC system features the recirculation of air? How is fresh air and pressurization introduced to the RW control room?
Radwaste Building Control room
recirc air is mixed with air from the RW supply AHU air
What temperature is maintained in the Radwaste Building Control room?
70 – 80F
Why does the HR system maintain the Radwaste building at a slightly negative pressure?
Ensures that the amount of uncontrolled/unmonitored release of potentially radioactivity air to the atmosphere from the Radwaste Building is minimized
What systems will the HR system collect vent discharges from?
Gaseous Radwaste (GR) Liquid Radwaste (LR) Solid Radwaste (SR) Chemical and Volume Control (CH) Nuclear Sampling (SS) Radioactive Waste (RD)
How does DS system interact with HR?
Provides water to the air washers
What system provides cooling water to the Radwaste Control Room ACU?
Normal Chilled Water System (WC)
What components of the Gaseous Radwaste System vent to the HR system?
System release path discharges upstream of the AFUs
Waste gas surge tank relief valve
GR compressor pre-filter, suction filter and package
What components of the Liquid Radwaste system vent to the HR system?
LR system evaporator, surface condenser and heater
Concentrate monitor tanks
LR system holdup tanks
What components of the CH system vents to the HR system?
BAC condensate ion exchanger and BAC condenser
What component of the Nuclear Sampling System vents to the HR system?
Oxygen analyzer exhaust fan
What part of the Radioactive Waste Drain System (RD) vents to HR system?
RD system RW building sump
What system provides air to the HR system air dampers? What happens if air is lost?
Instrument air
If air is lost, the dampers fail closed which will cause the AHUs and AFUs to trip on overload
Which radiation monitor tracks the GR system release flowpath?
RU-12
Which radiation monitors keeps track of the plant vent?
RU-143 and 144
The discharge of the Radwaste Building HVAC system is monitored by what component? Where is thi component located?
RU-14, upstream of the AFUs
RW building roof