RD- Radioactive Drains Flashcards
Where are the drains that are collected by the RD system sent to for processing, minus the reactor cavity sump and Decon and laundry facility sump?
Liquid Radwaste TDS holdup tanks
The RD system is used to detect leakage from what areas of the plant?
RCS, Refueling Pool, ESF equipment and the Spent Fuel Pool
What provides lubrication to the RD system’s sump pumps?
DW
What system operates the RD Containment Isolation valves?
Instrument Air
What system supplies power to the Sump Pump motors?
NH
What provides power to the DW solenoid valves supplying cooling water to all the sump pumps?
NK
Where is the RD system vented to?
HR, HA, HS
What is the maximum usable volume in the Reactor Cavity Sump?
520 gallons
Where is the Reactor Cavity Sump vented to?
Containment Building atmosphere
Where is the Reactor Cavity Sump located?
55’ containment building, accessed from the 80’
What are the two Reactor Cavity Sump Pumps rated for?
100% each, delivering 30 gal/min
What is the maximum usable volume of the East and West Containment Sumps? Where are they vented to?
390 gallons
containment building atmosphere
Where is the “overflow” line located in the East/West Containment Sumps? How many pumps are in each sump?
About 3 inches above the hi-hi level
one per sump
The West Containment sump collects what drains through how many penetrations?
One 4” penetration receiving effluent from floor drains, equipment drains, refueling pool and the refueling pool liner plate leak detector compartment
The East Containment sump collects what drains through how many penetrations?
Two penetrations: one is a 4” penetration receiving effluent from floor drains, equipment drains, and the refueling pool and the second is a 2.5” penetration receiving effluent from the Reactor Cavity Sump Pumps
Where are the Containment Radwaste Sumps located?
80’ Containment
What is the capacity of the Containment Sump Pumps?
100% capacity each, capable of delivering 50 gpm
What is the maximum usable volume of the ESF sumps? How many trains of RD ESF drain subsystems are there?
1320 gallons
two, A and B
How many penetrations does each ESF sump have and where do they come from?
Five penetrations
Shutdown cooling heat exchanger room, Containment Spray Pump room, High Pressure Safety Injection Pump room, Low Pressure Safety Injection room, and pipe chase room
Where do the ESF sumps vent to? What type of cover plate do these sumps have?
Aux Building HVAC exhaust duct
gas tight
Where are the ESF sumps located?
40’ Aux building
What lubricates the ESF sump pumps?
DW
What is the capacity of the ESF sump pumps? Where do they pump to?
100% capacity each and capable of delivering 50 gpm
Liquid radwaste TDS holdup tanks
What is the maximum usable volume of the Non-ESF sump?
880 gallons
There’s a 4” penetration that directs non-ESF drains and equipment drains throughout the Aux building to the non-ESF sump. What is directed through the 6” penetration?
Equipment Drain Tank relief valve
Where is the Non-ESF sump located? Where is it vented to?
40’ Aux Building
Aux. building HVAC exhaust duct
What are the Non-ESF sump pumps capacities?
100% capacity each and capable of delivering 50 gpm
What is the maximum usable volume of the Radwaste Building Sump? Where is it vent to?
920 gallons
radwaste hvac exhaust duct
Besides Radwaste Building floor drains and equipment drains, what else drains directly to the Radwaste Building Sump?
Water in Charging Pump Oil Drain Tank after transferring oil to a 55 gallon drum
Where is the Radwaste Building Sump located?
88’ Radwaste Building
What is the capacity of the Radwaste Building Sump pumps? Where do they pump to?
100% capacity each and capable of delivering 50 gpm
LR TDS holdup tanks
What is the maximum usable volume of the Fuel Building Sump? Where is it vented to?
1700 gallons
fuel building atmosphere
How many penetrations are there in the Fuel Building Sump and where do they come from?
Four:
floor drains/equipment drains in fuel building
cask decontamination pit
fuel pool liner plate leak detector compartment
the cask pit
Where is the Fuel Building Sump located?
95’ Fuel Building
What is the capacity of the Fuel building sump pumps? Where do they pump to?
100% capacity and capable of delivering 100 gpm
Liquid radwaste TDS holdup tanks
What is the maximum usable volume of the Holdup Tank Area Sump? Where is it vented to?
1660 gallons
outside atmosphere
What two pipe penetrations go into the Holdup Tank Area Sump?
line from the Reactor Makeup Tank, CVCS holdup pump room, and refueling water tank overflows
line from the holdup tank overflow
Where is the Holdup Tank Area Sump located? Where does it pump its contents to?
100’ outside Radwaste Building near the Holdup Tanks in the RCA yard
plant east side of the CVCS HUT
LR TDS holdup tanks
What is the capacity of the Holdup Tank Area Sump pumps?
100% capacity each and capable of delivering 150 gpm
What is the maximum usable volume of the Decontamination Facility Sump?
790 gallons
How many penetrations does Decontamination Facility Sump have?
Two 4” penetrations
Where is the Decontamination Facility Sump located?
Unit 1, decontamination side of the building
Where does the Decontamination Facility Sump pump to?
Chemical Drain Tanks
What is the capacity of the Decontamination Facility Sump Pumps?
100% capacity each and capable of delivering 50 gpm
How is the plant affected by a loss of RD system?
Sumps would eventually overflow and become a radioactive spill. If level gets high enough it could cause a loss of safety equipment
What is the purpose of the RD (radioactive drains) system? Where are the collected wastes sent?
The radioactive waste drain system collects and transports noncorrosive, radioactive, or potentially radioactive liquid wastes from equipment and floor drains of the
Containment, aux, fuel, radwaste buildings, MSSS, yard holdup tank area, decontamination and laundry facility(unit 1 only)
Liquid radwaste
Where does the RD containment inboard isolation valve get power from?
PH
How is the RD system affected by a CIAS?
RD containment isolation valves close and containment east and west sump pumps stop
Describe the level indication and alarms for the reactor cavity sump and containment sumps.
level continuously monitored by control room
alarms generated on high level, rate of level increase greater than 1gpm for an hour, and excessive pump run time
Where does the reactor cavity sump pump to?
the east containment sump
How often are the sump run times, located on the MCC breakers, logged by the Aux. building AO?
shiftly
What are the maximum normal and abnormal leakages to each ESF sump?
normal- 10 gallons per day
abnormal- 50 gallons per day
When does DW water start cooling the RD system sump pump bearings?
when a pump starts
What can potentially cause RD system sump pump run times to become excessive?
discharge line check valves become stuck open so when the alternate pump starts, much of the sump will just recycle until the hi-hi level comes in and starts the second pump
Where does the decontamination and laundry facility sump pump to?
Chemical drain tank
