Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Systems > Gaseous Radwaste(GR) > Flashcards

Gaseous Radwaste(GR) Flashcards

1
Q

What is the purpose of the Gaseous Radwaste system ? What kind of gases does it collect ?

A

-Collects & processes potentially radioactive gases generated in plant
-High Activity gases primarily hydrogen & Nitrogen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What kind of gases does Gaseous Radwaste Collect?

A

-High Activity gases primarily Hydrogen & Nitrogen,are collected & stored in oxygen free system to decay short-lived isotopes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How does GR interface with PH system ?

A

PH provides power to GR Containment Isolation Valves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How does GR interface with PK system ?

A

PK provides power to Class Solenoid Operated Valves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How does GR interface with NH system ?

A

NH provides power to Waste Gas Compressors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How does GR interface with NK system ?

A

NK provides power for Aux. relays in Radwaste Control Panels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How does GR interface with NN system ?

A

NN provides power to GR instrumentation in Radwaste Control Room

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How does GR interface with CH system ?

A

CH inputs into GR system from:
-RDT
-Gas Stripper
-VCT
-VCT Relief

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How does GR interface with Fuel Handling system(FH)?

A

FH has gaseous input to GR from Containment Refueling Failed Fuel Detector Vent & Dry Sipping Aux. Pump

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How does GR interface with Service Gases(GA)?

A

LP nitrogen is used for:
-Initial System Purge
-System Purge to allow for maintnence
-Auto purge from high oxygen senses in Surge Header

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How does GR interface with Radwaste Building HVAC(HR) ?

A

-High activity portion of GR discharges to HT system
-Low Activity aerated waste gas also vented from selected equip. to HR system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How does GR interface with NC system ?

A

Nuclear Cooling Water cools Waste Gas Compressors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How does GR interface with Radioactive Waste Drains(RD) system ?

A

RD system receives liquid wastes from GR system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How does GR interface with Radiation Monitoring(SQ) system ?

A

Monitors discharges gases, provide alarms, & closes discharge header isolation valves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How does GR interface with Nuclear Sampling (SS) system?

A

Samples lines for:
-Gas Surge Header
-Surge Tank
-Each Decay Tank
Returns lines from O2 analyzers back to Gas Surge Tank & Header

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How does GR interface with ESFAS ?

A

Closes RDT Vent header Containment isolation valve on a CIAS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Where does Gas Header receives potentially Radioactive gas inputs from ?

A

-RDT
-Containment Refueling Failed Fuel Detector Vent
-Dry Sipping Aux. Pump
-Gas Stripper
-VCT
-VCT Relief
-O2 Analyzers discharge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

When will Gas Surge Header RDT Containment Isolation Valves automatically close ?

A

They will close on a CIAS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is the 20 gallon condensate pot used for ?

A

Taps off Gas Surge Header to collect condensate that formed in the lines from RDT

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What’re the Oxygen Concentration alarm set points for Gas Surge Header ?

A

HI alarm: >2% alarm will activate in Main Control Room & Radwaste Control Room
HI-HI alarm: 3.75% will activate alarm & after 5 minutes will Nitrogen Auto Dilute

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What happens when HI-HI Oxygen Concentration alarm is reached ?

A

Will activate alarm & after 5 minutes it will Nitrogen Auto- Dilute the Gas Surge Header

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Where is the discharge of the oxygen analyzers directed back to ?

A

It’s directed back to the Gas Surge Header

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What does the Surge Gas Surge Tank do ?

A

Absorbs fluctuations in gas volume entering system to minimize Waste Gas Compressor operating time

24
Q

What is the design temperature of the Waste Gas Surge Tank plastic liner ?

A

Plastic liner design temp. is 200F

25
Q

What’re the Waste Gas Compressors used for ?

A

They pump LP gas from Waste Surge Tank to the Waste Gas Decay Tank for holdup prior to release

26
Q

What is the Mode Selector switch used for on the Radwaste Control Panel ?

A

Two position switch that chooses, which Gas Compressor will be the lead or standby compressor

27
Q

With both Waste Gas Compressor hand switches in auto, what pressure will the lead & standby compressor start ? When do the compressors turn off ?

A

-Lead Compressor starts @3psig HI pressure in Waste Gas Surge Tank
-Standby Compressor starts @5psig HI-HI pressure in Waste Gas Surge Tank
-Will turn off @1.5psig Waste Gas Surge Tank pressure

28
Q

What cools the Waste Gas Compressors ?

A

Requires Nuclear Cooling Water

29
Q

Where are Waste Gas Compressors powered from ?

A

Powered from NH

30
Q

What happens to running Waste Gas Compressors when an Nitrogen Auto-Dilution of the Gas Surge Header occurs?

A

Compressors will trip & are reset by taking handswitch to “stop” and then back to “Auto”

31
Q

What should the oil system be maintained at for each compressor ?

A

Sight glass should be maintained between Full mark & 1/2 above Full Mark

32
Q

How often should each Waste Gas Compressor be ran ?

A

Each compressor must be ran at least weekly to maintain Oil Priming for compressor

33
Q

How often is the “Lead/Standby” selector switch be swapped ?

A

Selector switch for compressor should be swapped twice per week

34
Q

What must you do to Waste Gas Compressor if the compressor is not ran for 7days?

A

Oil must be primed manually via priming pump hand wheel

35
Q

What’re the Waste Gas Decay Tanks used for ?

A

Used to store waste gas for radioactive decay before being discharged to atmosphere

36
Q

What is the design pressure of plastic liner inside the Waste Gas Decay Tanks ?

A

Has design pressure if 380psig

37
Q

What is the Waste Gas Decay Tanks setpoint for the relief valve ? Where does it relieve to ?

A

-It has a setpoint at 380psig
-Relieves to Waste Gas Surge Tank

38
Q

What pressure is a waste gas decay tank isolated ? How long must it remain isolated ?

A

-Has to reach 340psig to be isolated
-Has to remain isolated for at least 45 days

39
Q

Prior to releasing Waste Gas Decay Tank what must be done before releasing it to Radwaste Building Ventilation ?

A

Must have it sampled by chemistry

40
Q

What happens if maintenance is scheduled for the tank ?

A

The tank will be completely released and purged with nitrogen

41
Q

What must the control room do to allow the Radwaste control room to operate the GR Discharge Isolation Valves ?

A

They have to give you permissive by turning a hand switch in control room

42
Q

What signals wi automatically close GR Discharge Isolation Valves ?

A

-Radwaste Building Exhaust fan A&B low DP
-High waste gas discharge flow
-High Waste Gas discharge pressure in radiation Monitor supply line
-High radiation level

43
Q

What other valve will isolate if any of the GR Discharge Isolation Valves were to automatically close ?

A

The air supply solenoid will close , which will close the flow control valve (FV-33)

44
Q

What’re the two mode of operations for the GR Discharge Flow Control Valve ? What do you control valve when in manual ?

A

-Has auto & manual pushbuttons
-Manual operations has a lever to adjust flow either fast feed & slow feed

45
Q

What is the position of the flow control valve when the GR Discharge Isolation valves go open?

A

Flow control valve will slowly open slightly less than release permit limit

46
Q

What is installed before the Radiation Monitor to prevent excessive flow through it ?

A

A flow limiting orifice is installed upstream that limit flow to 5 SCFM

47
Q

How is the High Radiation level setpoint determined ?

A

-Based on the Gas Decay Tank being released
-Prior to release tank is sampled to determine radiation activity
-Radiation setpoint is, then set 3X higher than expected

48
Q

How many oxygen analyzers are there? Which components of the GR system has a oxygen analyzer?

A

There are four oxygen analyzers
-Waste Gas Surge Header
-Waste Gas Surge Tank
-In-Service Waste Gas Decay Tank
-Fourth oxygen analyzer can be aligned to other components

49
Q

What will happen on a 2% oxygen concentration ?

A

-Activates high oxygen alarm in main control room & Radwaste control room

50
Q

What will happen when oxygen concentration is 3.75% ?

A

-HI-HI oxygen alarm will activate & after 5mins of alarming nitrogen auto dilute will occur

51
Q

What components is nitrogen auto dilute aligned to ?

A

-Waste Gas Surge Header
-Waste Gas Decay Tank
-Upstream of Waste Gas Compressors

52
Q

What happens to Waste Gas Compressors when a Nitrogen AutoDilute occurs ?

A

-Trips & locks out both Waste Gas Compressors

53
Q

When the waste gas compressors trip on Nitrogen Auto Dilute, how do you reset them ?

A

Take both compressors to “stop” & return them to auto position

54
Q

What might be the problem if the High Oxygen Analyzers of the Waste Gas Decay Tanks alarm, BUT the Waste Gas Surge Tanks didn’t alarm ?

A

There is most likely a Waste Gas Compressor leak

55
Q

What is the TRM for explosive gas monitoring system ?

A

2 oxygen monitors must be operable
-Oxygen Monitor(Surge Tank)
-Oxygen Monitor(Waste Gas Header)

56
Q

What is the TRM for the Concentration of oxygen in the GR system ?

A

Shall be limited to <2%

Systems (62 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions