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NLO Systems NLIT exam 3 > RD- Radioactive Drains > Flashcards

RD- Radioactive Drains Flashcards

1
Q

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?

A

Liquid Radwaste TDS holdup tanks

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2
Q

The RD system is used to detect leakage from what areas of the plant?

A

RCS, Refueling Pool, ESF equipment and the Spent Fuel Pool

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3
Q

What provides lubrication to the RD system’s sump pumps?

A

DW

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4
Q

What system operates the RD Containment Isolation valves?

A

Instrument Air

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5
Q

What system supplies power to the Sump Pump motors?

A

NH

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6
Q

What provides power to the DW solenoid valves supplying cooling water to all the sump pumps?

A

NK

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7
Q

Where is the RD system vented to?

A

HR, HA, HS

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8
Q

What is the maximum usable volume in the Reactor Cavity Sump?

A

520 gallons

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9
Q

Where is the Reactor Cavity Sump vented to?

A

Containment Building atmosphere

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10
Q

Where is the Reactor Cavity Sump located?

A

55’ containment building, accessed from the 80’

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11
Q

What are the two Reactor Cavity Sump Pumps rated for?

A

100% each, delivering 30 gal/min

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12
Q

What is the maximum usable volume of the East and West Containment Sumps? Where are they vented to?

A

390 gallons

containment building atmosphere

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13
Q

Where is the “overflow” line located in the East/West Containment Sumps? How many pumps are in each sump?

A

About 3 inches above the hi-hi level

one per sump

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14
Q

The West Containment sump collects what drains through how many penetrations?

A

One 4” penetration receiving effluent from floor drains, equipment drains, refueling pool and the refueling pool liner plate leak detector compartment

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15
Q

The East Containment sump collects what drains through how many penetrations?

A

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

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16
Q

Where are the Containment Radwaste Sumps located?

A

80’ Containment

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17
Q

What is the capacity of the Containment Sump Pumps?

A

100% capacity each, capable of delivering 50 gpm

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18
Q

What is the maximum usable volume of the ESF sumps? How many trains of RD ESF drain subsystems are there?

A

1320 gallons

two, A and B

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19
Q

How many penetrations does each ESF sump have and where do they come from?

A

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

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20
Q

Where do the ESF sumps vent to? What type of cover plate do these sumps have?

A

Aux Building HVAC exhaust duct

gas tight

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21
Q

Where are the ESF sumps located?

A

40’ Aux building

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22
Q

What lubricates the ESF sump pumps?

A

DW

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23
Q

What is the capacity of the ESF sump pumps? Where do they pump to?

A

100% capacity each and capable of delivering 50 gpm

Liquid radwaste TDS holdup tanks

24
Q

What is the maximum usable volume of the Non-ESF sump?

A

880 gallons

25
Q

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?

A

Equipment Drain Tank relief valve

26
Q

Where is the Non-ESF sump located? Where is it vented to?

A

40’ Aux Building

Aux. building HVAC exhaust duct

27
Q

What are the Non-ESF sump pumps capacities?

A

100% capacity each and capable of delivering 50 gpm

28
Q

What is the maximum usable volume of the Radwaste Building Sump? Where is it vent to?

A

920 gallons

radwaste hvac exhaust duct

29
Q

Besides Radwaste Building floor drains and equipment drains, what else drains directly to the Radwaste Building Sump?

A

Water in Charging Pump Oil Drain Tank after transferring oil to a 55 gallon drum

30
Q

Where is the Radwaste Building Sump located?

A

88’ Radwaste Building

31
Q

What is the capacity of the Radwaste Building Sump pumps? Where do they pump to?

A

100% capacity each and capable of delivering 50 gpm

LR TDS holdup tanks

32
Q

What is the maximum usable volume of the Fuel Building Sump? Where is it vented to?

A

1700 gallons

fuel building atmosphere

33
Q

How many penetrations are there in the Fuel Building Sump and where do they come from?

A

Four:

floor drains/equipment drains in fuel building

cask decontamination pit

fuel pool liner plate leak detector compartment

the cask pit

34
Q

Where is the Fuel Building Sump located?

A

95’ Fuel Building

35
Q

What is the capacity of the Fuel building sump pumps? Where do they pump to?

A

100% capacity and capable of delivering 100 gpm

Liquid radwaste TDS holdup tanks

36
Q

What is the maximum usable volume of the Holdup Tank Area Sump? Where is it vented to?

A

1660 gallons

outside atmosphere

37
Q

What two pipe penetrations go into the Holdup Tank Area Sump?

A

line from the Reactor Makeup Tank, CVCS holdup pump room, and refueling water tank overflows

line from the holdup tank overflow

38
Q

Where is the Holdup Tank Area Sump located? Where does it pump its contents to?

A

100’ outside Radwaste Building near the Holdup Tanks in the RCA yard

plant east side of the CVCS HUT

LR TDS holdup tanks

39
Q

What is the capacity of the Holdup Tank Area Sump pumps?

A

100% capacity each and capable of delivering 150 gpm

40
Q

What is the maximum usable volume of the Decontamination Facility Sump?

A

790 gallons

41
Q

How many penetrations does Decontamination Facility Sump have?

A

Two 4” penetrations

42
Q

Where is the Decontamination Facility Sump located?

A

Unit 1, decontamination side of the building

43
Q

Where does the Decontamination Facility Sump pump to?

A

Chemical Drain Tanks

44
Q

What is the capacity of the Decontamination Facility Sump Pumps?

A

100% capacity each and capable of delivering 50 gpm

45
Q

How is the plant affected by a loss of RD system?

A

Sumps would eventually overflow and become a radioactive spill. If level gets high enough it could cause a loss of safety equipment

46
Q

What is the purpose of the RD (radioactive drains) system? Where are the collected wastes sent?

A

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

47
Q

Where does the RD containment inboard isolation valve get power from?

A

PH

48
Q

How is the RD system affected by a CIAS?

A

RD containment isolation valves close and containment east and west sump pumps stop

49
Q

Describe the level indication and alarms for the reactor cavity sump and containment sumps.

A

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

50
Q

Where does the reactor cavity sump pump to?

A

the east containment sump

51
Q

How often are the sump run times, located on the MCC breakers, logged by the Aux. building AO?

A

shiftly

52
Q

What are the maximum normal and abnormal leakages to each ESF sump?

A

normal- 10 gallons per day

abnormal- 50 gallons per day

53
Q

When does DW water start cooling the RD system sump pump bearings?

A

when a pump starts

54
Q

What can potentially cause RD system sump pump run times to become excessive?

A

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

55
Q

Where does the decontamination and laundry facility sump pump to?

A

Chemical drain tank

NLO Systems NLIT exam 3 (21 decks)

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