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ATR SRO Level of Knowledge > Effluent Waste Systems > Flashcards

Effluent Waste Systems Flashcards

TRA00128

1
Q

What four systems comprise effluent waste?

A

Cold Waste
Warm Waste
Hot Waste
Sanitary Waste

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2
Q

What are the sources of Gaseous Waste in ATR?

A

Fission product leakage from fuel
Fission product leakage from experiments
Rad gas from activation of Ar-40
Particulate material from:
1. Degas Tk
2. Loop pzr vent
3. Valve packing

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3
Q

Where does most of the rad gas exhausted from the ATR stack come from?

A

Degas Tank

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4
Q

What is the purpose of the H&V System?

A

Control air movement in, through, and out of the plant to minimize the dispersal of airborne contamination between sectionalized work areas within the facility.

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5
Q

How tall is the ATR exhaust stack?

A

250 feet.

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6
Q

Which systems supply air to ATR?

A

HVS-1 - South confinement (reactor main floor, 1st and 2nd basements)
HVS-2 - ATR Reactor and Office areas
HVS-3 - Canal and laydown areas
HVS-4 - ATR Office areas and restrooms
HVS-5 - Diesel room and north confinement (HDW and switchgear)

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7
Q

What are the 5 ATR Stack Monitoring Systems?

A

SPING - monitors Particulate/Iodine/Noble Gas
PPS Stack Monitoring Sys - 3 GM Instruments. 2/3 channels will initiate RMS-1 to seal confinement.
GM-34 (stack breach) or GM-35 (ATR H&V Plenum) - Initiate plant evac system alarms in RCR.
Real time monitor - Samples air going to Stack and provides isotopic analysis of effluent.
RML - Manual sampling.

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8
Q

Where is the ATR APANTEC SPING unit located?

A

West 2nd Basement

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9
Q

What is the SPING power supply?

A

Utility UPS

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10
Q

What are the ATR Evacuation systems?

A

A and B

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11
Q

What activates ATR Evac System A?

A

RAM-34 (stack breach) or 2/3 RAM-5,6, or 23

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12
Q

What activates ATR Evac System B?

A

RAM-35 (Exhaust Plenum) or 2/3 RAM-2,13, or 24

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13
Q

What are RAM-34/35 setpoints?

A

45 mR/hr

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14
Q

What are RAM-2,5,6,13,23,24 setpoints?

A

1 R/hr

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15
Q

What is required upon receipt of a valid evacuation alarm?

A

Manual Scram

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16
Q

What equipment changes position on receipt of a RMS-1 shutdown?

A

Shutdown of ATR H&V systems
Closing of primary and backup containment dampers

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17
Q

What is the hi-hi level trip sepoint for RMS-1?

A

45 mR/hr

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18
Q

What is required on a valid RMS-1 signal?

A

Manual Rx Scram

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19
Q

What is the purpose of the Digital Radiation Monitor System (DRMS)?

A

To detect, indicate, and record radiation and airborne radioactivity levels.

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20
Q

What are the ATR Stack Effluent Monitoring Limits?

A

450 Curies/day Noble Gas
6 Curies/day Particulates
0.2 Curies/day Iodine

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21
Q

What is the maximum public dose at the maximum permitted release from ATR?

A

2.5 mRem per annum

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22
Q

What are the three Air Stack Effluent Monitoring Action Levels?

A

First AL: 3x normal for gas or 10x normal for iodine/particulate: draw sample within 24 hours and report to management
Second AL: 20x normal for gas, iodine, or particulate: notify management within 30 minutes and draw sample within 8 hours, evaluate source and reactor operation within 48 hours
Third AL: 10 mrem/yet ETD from airborne releases: 2.5 mrem annual dose to public notify within 30 minutes, sample within 8 hours and every 8 hours thereafter, scram within 48 hours

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23
Q

What is the primary radioisotope from ATR stack?

A

Argon 41 (83% of all radgas released) from degas tank.

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24
Q

What reduce Ar-41 release?

A

Argon Delay System

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25
Q

Which ATR Stack Monitoring System uses gamma ray pulse height spectrum analysis?

A

ATR Real Time Monitor

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26
Q

Who controls and maintains the Real Time Monitor

A

RML

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27
Q

What is the radiological limit for water to be considered cold waste?

A

0.01 uCi/mL

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28
Q

What are the sources of cold waste from ATR?

A

Cooling Tower Blowdown
Raw Water Cooled Air Handlers
Canal HX Cooling
GSW & N16 Pump Oil Coolers
PCS Pump Oil Cooler HX
EFIS Piping Drains
PCS HX Secondary Drains

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29
Q

What source is the most significant contributor to Cold Waste?

A

Cooling Tower Blowdown @ 100-120 GPM.

30
Q

Where is Cold Waste water discharged?

A

Cold Waste Seepage pond to percolate into the aquifer.

31
Q

Where is the water from PCP Oil Coolers collected before being pumped from the building?

A

M-186 Cold Waste Collection Tank

32
Q

How many pumping units comprise the Cold Waste Collection and Discharge System?

A

There are four pumping units.

33
Q

Where are the different Cold Waste Collection Pumping Units Located?

A

M-158 - HDW Room
M-159 - HX Pit
M-160 - Bypass Demin Room
M-161 - Primary Piping Corridor

34
Q

Where do the diesel pit floor drains collect for sampling and disposal?

A

North center floor drain empties to the oil separator unit and then to M-158 in the HDW Room
M-42 Generator and South drains go to the East Cold Waste HUT
M-43 Generator and South drains go to the West Cold Waste HUT

35
Q

Where is water collected in the East and West Cold Waste HUTs disposed of?

A

If all sampling and analysis criteria are met, they can be disposed to the M-158 Cold Waste Collection Pumping Units.
If oil is present the waste is pumped to 55 gallon barrels for disposal.

36
Q

Where is waste collected from the HDW System disposed?

A

2A-C Hot Experiment Drains

37
Q

If cooling tower blowdown were to become contaminated how could it be prevented from entering Cold Waste Leaching Pond?

A

Closing the gate in manhole MH 22-C and pumping to Warm Waste.

38
Q

Where are the Cold Waste Leaching Ponds located?

A

Southeast of the ATR Complex.

39
Q

Who operates the equipment and treatment facilities for sanitary waste system?

A

Site Services out of CFA.

40
Q

What powers the ATR Complex Cold Waste Pumps?

A

Cold Waste Pumps are powered normally from Comm/Diesel
Portable generators can also be setup to power the pumps.

41
Q

Warm Waste from different TRA-670 building sources are collected where?

A

ATR 670-M-28 Warm Waste Tank

42
Q

What is the capacity of 670-M-28 Warm Waste Tank?

A

5000 gallons

43
Q

Why is the conductivity of wastewater dumped to the WWS restricted?

A

High cond’y water processed through the WWTF will prematurely deplete resin beds and possibly release radioactive material previously captured on the resin.

44
Q

What are the possible disposal paths for wastewater collected in 670-M-28?

A

ATR Warm Waste Treatment Facility (WWTF)
TRA-605 Warm Waste Treatment Facility
ATR Complex Warm Waste Evaporation Pond

45
Q

What are the major sources to the Warm Waste System?

A

Primary Degas Tk Overflow
GSWFT Overflow
HX Sump
Rod Access and Pipe Tunnel Sump
Warm Floor Drains
Canal Overflows and Drains
Warm Experiment Drains
Reactor Tank Drains

46
Q

Where does overflow from 670-M-28 WW Tank go?

A

Hot Waste Tank 670-M-27

47
Q

What are the power supplies to the Warm Waste Pumps?

A

M-31 - Diesel 480V E-13
M-32 - Comm 480V E-12

48
Q

What type of level transmitters are used in the WWT?

A

LT-5-1 Radio Frequency
LT-5-2 Bubbler System

49
Q

Which of the two systems controls Warm Waste Tank Level?

A

The one that’s selected at the DCS Console.

50
Q

Where can local indication of Warm Waste Tank level be viewed?

A

Gauges in the ATR Motor Floor Area

51
Q

What other warm waste equipment is located in the Motor Floor Area?

A

Warm Waste Pump motors
Warm Waste Sump level indication.

52
Q

If both Warm and Hot Waste Tanks are full where will waste water be directed?

A

Warm Waste Sump
HVE-8 Ventilation Ducting

53
Q

How are Warm Waste Floor Drains identified?

A

Yellow ring painted around the drain cover.

54
Q

How does ATR Warm Waste Treatment Facility reduce wastewater radioactivity?

A

Warm wastewater from M-28 is circulated through HOH mixed red resin to remove radioactive ions.

55
Q

Where does Warm Wastewater go after passing through the resin beds?

A

Treated waste can go to either:
1. Waste line to TRA-605 Effluent Monitoring System
2. Recycled back to the WWT

56
Q

Where is the ATR WWTF equipment located?

A

ATR First Basement southwest corner

57
Q

If high conductivity water must be dumped to the ATR Warm Waste, what should be done to the WWTF?

A

WWTF should be bypassed.

58
Q

What happens on high rad of 40 mR/hr on WWTF outlet?

A

Operating WWP stops
WWT begins to fill and possibly overflow

59
Q

How can WWPs be restarted after high rad trip?

A

Select WWTF to BYPASS will restart the pump.

60
Q

When is Warm Waste from the ATR Complex sampled?

A

Warm waste is sampled as it collects in the WW Pumping Vault.

61
Q

How would a leak in the Evaporation Pond liner be detected?

A

Drainage pipes located under the liner drain any liquid into collection sumps.

62
Q

What water must be disposed of as Hot Waste?

A
  1. High conductivity contaminated wastewater
  2. Contaminated waste that exceeds 100x effluent limits or greater than 1E-3 uCi/ml for Cs-137 or Sr-90.
  3. Waste with gross alpha greater than 1E-4 uCi/ml
63
Q

What are the sources of Hot Waste from within ATR?

A

Hot Experiment Drains
Subpile Room Floor Drains
Experiment High Point Vents
Nozzle Trench Drains

64
Q

Where is Hot Waste from various sources in ATR collected?

A

1000 gallon Hot Waste Tank M-27.

65
Q

Where is M-27 located?

A

Shielded pit under the South Basement floor (next to M-28)

66
Q

Where can the waste collected in M-27 be disposed?

A

ATR M-28 WWT to Evaporation Pond (normal)
TRA-605 WWTF and then to Evap Pond
TRA-605 HWST (Emergency Only)

67
Q

What must be completed prior to moving wastewater from M-27?

A

Waste must be mixed, sampled, and analyzed before pumping.

68
Q

What are the power supplies to the Hot Waste Pumps?

A

M-29 - Diesel 480V E-13
M-30 - Comm 480V E-12

69
Q

How are Hot Waste Floor Drains designated?

A

Hot Drains have a magenta ring painted around them.

70
Q

At what Hot Waste Tank level do the pumps automatically start?

A

HWPs are operated in MANUAL (no auto start)

71
Q

What type of level system is used in the Hot Waste Tank?

A

Bubbler system

72
Q

With no IA, what will the Hot Waste Tank level read?

A

Empty

ATR SRO Level of Knowledge (16 decks)

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