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My NLIT > RD-Radioactive Drains > Flashcards

RD-Radioactive Drains Flashcards

1
Q

What is the purpose of the Radioactive Drains system?

A

Collects and transports noncorrosive, radioactive, or potentially radioactive liquid wastes from equipment and floor drains.

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2
Q

Which areas have radiactive drains?

A
  • Containment Building
  • Auxiliary Building
  • Fuel Building
  • Radwaste Building
  • Holdup Tank Area
  • Main Steam Support Structure
  • Decontamination and Laundry Facility (Unit 1 only)
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3
Q

What areas does the Radioactive Drain system detect leakage from?

A
  • Reactor Coolant system
  • Refueling Pool
  • ESF Equipment
  • Spent Fuel Pool
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4
Q

Where do the Radioactive drain systems flow?

A

They are pumped to Liquid Radwaste system for processing.

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5
Q

Which systems does Radioactive Drains receive waste from?

A

RC, SI, CH, PC, HC, HA, HR, HF, DW, SG, FW, AF (aux feedwater), GR (gaseous radwaste), EC, CP (containment purge system), LR (liquid radwaste), SR/RF (solid radwaste and raioactive filter handling system), NC, RL (decontamination system), SE (Ex-core neutron monitoring system)

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6
Q

What is the purpose of the reactor cavity sump/pump?

A

Collects leakage and condensate from the Reactor Cavity and Excore Instrumentation. 520 gallons would require 2 pumps to be running, 30 gpm per, 100% cap. Vented to containment bldg atmosphere.

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7
Q

What is the purpose of the Containment East and West Sumps/Pumps?

A

Leakage of water and condensed liquid from steam in containment are collected and routed to the Containment East/West Radwaste Sumps.
390 gal, 1 pump per, 100% cap

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8
Q

What does the west sump receive effluent from?

A
  • floor drains
  • equipment drains
  • Refueling Pool
  • Refueling Pool liner plate leak detector compartment.
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9
Q

What does the east sump receive effluent from?

A
  • One is a 4-inch stainless steel penetration receiving effluent from
    o floor Drains
    o equipment Drains
    o Refueling Pool
  • The Second Is A 2-1/2 Inch Stainless Steel Penetration Receiving Effluent from the Reactor Cavity Sump Pumps.
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10
Q

What does Tech Spec 3.4.16 state?

A

Both of the following RCS leakage detection instrumentation shall be OPERABLE:
a. One Containment Sump monitor
b. One Containment atmosphere radioactivity monitor (gaseous and particulate).

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11
Q

Where do containment radwaste sump pumps send water?

A

Liquid Radwaste TDS (total dissolved solids) Holdup Tanks.

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12
Q

What does the AO take rounds on daily for the Containment Sump?

A

Sump run time.

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13
Q

What is the purpose of the ESF Sumps?

A

Drainage system for the rooms containing redundant ESF equipment , utilize independent drain trains (train A and train B), so that flooding of the redundant ESF rooms of one train will not jeopardize the operation of the remaining train of redundant ESF equipment.

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14
Q

How many separate penetrations does each train specific and separate sump have?

A

5 penetrations
Shutdown Cooling HX room
Containment Spray Pump room
HPSI Room
LPSI Room
Pipe Chase area room

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15
Q

What is the purpose of the ESF pumps?

A

Transfer the ESF Sump contents to the Liquid Radwaste TDS Holdup Tanks.
100% cap, 50gpm, lubricated by demineralized water

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16
Q

What is the purpose of Non-ESF Sump?

A

For the Non-ESF equipment which empties into a separate sump in the Auxiliary building and vents to auxiliary exhaust.

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17
Q

What is the purpose of the Non-ESF Sump Pumps?

A

Pump the sump contents to the Liquid Radwaste TDS Holdup Tanks, lubricated by DW, 100% cap, 50 gpm, vents to the aux bldg atmosphere

18
Q

What is the purpose of the Radwaste Building Sump?

A

Collects leakage from equipment and drainage from floor drains in the Radwaste Building. 920 gal, vented to radwaste build hvac.

19
Q

Where does oil from charging pump collect in the radwaste building?

A

A Charging pump oil drain tank. When tank is full it gets pumped to a 55gal drum.

20
Q

What is the purpose of the Radwaste Building Sump Pumps?

A

Pump their sump contents to the Liquid Radwaste TDS Holdup Tanks. 100% cap, 50 gpm, lubricated by DW

21
Q

What is the purpose of the Fuel Building Sump?

A

Collects leakage from equipment and drainage from floor drains in the Fuel Building. 1700 gallons, vented to fuel bldg hvac

22
Q

How many penetrations does the Fuel Building Sump have?

A

4 penetrations
Floor & equipment drains in Fuel Bldg
Cask decontamination pit.
Fuel pool liner plate leak detector compartment.
Cask pit

23
Q

What is the purpose of the fuel building sump pumps?

A

Pump their sump contents to the Liquid Radwaste TDS Holdup Tanks. 100% cap, 100 gpm,

24
Q

What is the purpose of the Holdup Tank Area Sump?

A

Collects overflow and drainage from equipment and tanks in the RCA Yard. 1660 gal, vented to atmosphere

25
Q

How many penetrations does the Hold up tank area sump have?

A

2 Penetrations
* A 6-inch pipe from the:
o Reactor Makeup Water Tank
o CVCS Holdup Pump Room
o Refueling Water Tank overflows
* A 3-inch from the CVCS HUT overflow.

26
Q

What is the purpose of the Holdup Tank Sump Pumps?

A

Pump their sump contents to the Liquid Radwaste TDS Holdup Tanks. 100% cap, 150 gpm, lubricated by DW

27
Q

What is the purpose of the Decontamination and Laundry Facility Sump?

A

Collects drainage from equipment and floor drains in the Decontamination and Laundry Facility.790 gal, only in Unit 1

28
Q

What is the purpose of the Decontamination and Laundry Facility Sump Pumps?

A

Pump their sump contents to the Liquid Radwaste Chemical Drain Tanks. 100% cap, 50 gpm, lubricated by DW

29
Q

What are the controls for the Radioactive Drains system Sump Pumps?

A

(STOP/AUTO/START) handswitch
In Auto- alternator switches between pumps to equalize run times. Pump starts on Hi level, stops on a Lo level.
LSHH will start standby pump. Hi-Hi sumps will alarm B07 in CR. Lo-Lo level will trip pump.

30
Q

How will the loss of Radioactive Drain system impact the plant?

A

Would have a long term affect on the plant. If no pumps, the sumps would eventually overflow =radioactive spill. If the level got high enough it could cause a loss of safety equipment.

31
Q

What is the purpose of the Special Process Heat Tracing System (QM)?

A

Maintains given temps associated with special processes. (in pipes, tanks, and pumps)

32
Q

Which systems use Special Process Heat Tracing?

A
  • Boric Acid Batching Tank
  • Reactor Makeup Water Tank piping
  • Holdup Tank piping
  • Refueling Water Tank piping
  • RU-141(Condenser Vacuum/Gland seal Exhaust(/143(Plant Vent) piping
  • Hydrogen Analyzer System
  • Solid Radwaste System
  • Liquid Radwaste System Evaporator
  • Boric Acid Concentrator
33
Q

What is the purpose of the step down transformers?

A

Supplies power to a control panel by stepping down the voltage from a 480 VAC MCC power supply to 120 VAC

34
Q

What is the purpose of the control panels?

A
  • Cntrl& distrb heater element power
  • Monitor and display the temperature
  • Monitor continuity and power supply.
  • Annunciate and indicate alarms.
  • Integrate alarms for 1 CR alarm.
  • Wall mounted w/ doors. All line temps, alarm lights, and indications are visible from outside the panel. The panel& controllers are on the front.
35
Q

What is the purpose of the heater elements?

A

Heat the required physical subsystems, installed along pipes, under the insulation, etc. For use < 200°. For >200°F mineral insulationis useed

36
Q

What is the purpose of the heater elements?

A

Heat the required physical subsystems, installed along pipes, under the insulation, etc. For use < 200°. For >200°F mineral insulation is used

37
Q

What is the NORMAL operation of the Special Process Heat Tracing system?

A

RTD sends input signal to controller > line temp displayed> and compared to set temp > heater element turns on/off to regulate w/i +/-2.5°F

38
Q

What is the power source for Heaters for outdoor Q-class piping?

A

NH

39
Q

What is the power supply for Heat tracing for the hydrogen analyzer?

A

Class 1E MCC (PH)

40
Q

How does a loss of the Special Process Heat Tracing system impact the operation of the plant?

A

If the hydrogen monitor heat tracing becomes nonfunctional, entry into TRM 3.3.105 Condition A is required.
In boric acid systems there is a possibility that the lines may rock up.

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