Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

4. EOPs > E-3 Daily Quiz > Flashcards

E-3 Daily Quiz Flashcards

(55 cards)

Start Studying
1
Q

When does a tube leak become a tube rupture?

A

Greater than the capacity of one CCP

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

What are the primary to secondary leak rate limits?

A 
75 gpd mode 3 in 24 hours
150 gpm mode 3 in 6 hours
75 gpd w/ 30gpd rise
-be less than 50% in one hour
-be in mode 3 in two hours
50 gpm RX trip
100 gpm RX trip and SI
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How do you calculate primary leakage?

A

Charging - Letdown - Seal Leakoff

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

Define uncontrolled level rise in a SG?

A

Level continues to rise with all feedwater isolated

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

What are the limitation of the SG porv rad monitors for identifying a tube rupture?

A

PORV must be open to detect and will only detect high rad levels

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

What unique UFSAR assumption is taken into account for a tube rupture?

A

Operator Actions

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

How can a SGTR present a PTS concern?

A

Without RCPs running loop stagnation of cold ECCS water can occur

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

How does the lack of RCPs effect the concer for SG overfill?

A

Greater concern due to slower cooldown rate

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

Besides SG overfill what concerns exists during a SGTR while on Natural Circ?

A

PTS and Boron Dillution

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

What adverse condition come from SG overfill?

A

Damage to PORVs and SVs and TDAFP
Increased RAD release
Rupture Mainsteam lines from waterhammer or overfill

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

What must be done to terminate primary to secondary leakage during a SGTR?

A

Lower RCS pressure

Terminate SI

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

Entry conditions for E-3?

A

Abnormal secondary rad monitors

SG level rising in an uncontrolled manner

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

What is the basis for isolating the ruptured SG in E-3?

A

Allows intact SGs to be depressurized below ruptured SG pressure

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

What action must be taken if a Faulted SG is identified during E-3?

A

Go to E-2

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

What is the basis for Control Room Pressurization FOP criteria?

A

Ensure dose limits are not exceeded

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

What procedure transition must be made if SI reinitiation criteria are met during E-3?

A

Transition to ECA-3.1 due to concurrent LOCA event

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

What is the basis for the target temperature for the cooldown in E-3?

A

Provide a 20 degree subcooling margin when the RCS reaches ruptured SG pressure

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

What component is used to perform the maximum rate cooldown in E-3 during a LOOP?

A

Intact SG PORVs

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

During the maximum rate cooldown what must be done with the RCPs when RCS pressure reaches 1300 psig?

A

Leave them running due to cooldown being operator induced

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

What is the basis for checking subcooling >60 degrees following max rate cooldown in E-3?

A

Ensure LOCA is not occuring

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

What is the basis for maintaining ruptured SG level >13% in E-3 procedures?

A

Prevent steam from contacting SG tubes causing a rapid depressurization due to condensing steam

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

After terminating SI in E-3 what must be done if PRZ level is low and SG level is lowering?

A

Raise Charging flow

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

What must be done after SI terminated in E-3 if PRZ level is 50-72% and SG level is rising?

Study These Flashcards
A

Lower Charging

Reduce pressure

24
Q

What depressurization method is used with no RCPs with air restored to containment (Second depressurization)?

25
How do you determine target temperature for max rate cooldown if multiple SGs are ruptured?
Use lowest SG pressure
26
State the three post SGTR recovery methods
Backfill - Preffered Blowdown Steam Dump - DRV-407
27
State the advantages and disadvantages of the backfill recovery method
+ Minimal rad release + Processing of contaminated water - Slow - Dilution to RCS
28
State the advantages and disadvantages of the blowdown recovery method
``` + Minimal rad release + Eliminates potential RCS dilution - Processing capabilities - Slow - Spread of contamination ```
29
State the advantages and disadvantages of the steam dump recovery method
+ Fastest - Rad release - Cannot perform if SG overfilled (95%)
30
What method is used to cool the ruptured SG?
Let level lower to 27% then refill to 62%
31
How is RCS leakage minimized during cooldown to 350 degrees using blowdown recovery method?
Using heaters, spray, and charging flow based on PRZ level to maintain SG level stable
32
How is SG level controlled during cooldown the backfill recovery method?
RCS pressure and AFW
33
Why do we verify SDM in ES-3.1 backfill recovery method?
Boration from RWST in E-3 and need to be ready for dilution from backfill
34
Why do we refill the ruptured SG during backfill if level lowers to 27%?
Potential rapid depressurization if tubes are uncovered
35
If offsite dose calcs are not acceptable for ES-3.2 what must be done?
Either ES-3.1 or ES-3.3
36
What is the SI termination criteria for PRZ level in E-3? What must be done if level requirements are not met?
16% | Loop back through E-3 to depressurize and refill
37
When should SDM be calculated while performing ES-3.1?
When concentration sample results are available
38
Why are PRZ heaters energized early in ES-3.1?
Saturate PRZ to limit drepressurization when sprays or PORVs are opened
39
After completing boration to cold shutdown what would be the cause of a rise in source range counts during ES-3.1 backfill?
Dilution from SG backfill
40
What type of events could cause transition to ECA-3.1?
SGTR with LOCA Faulted/Ruptured SG Unable to isolate ruptured SG from intact Unable to maintain required DP
41
What procedure can you enter ECA-3.2 from?
ECA-3.1 SGTR with LOCA subcooled recovery | ECA-3.2 is with LOCA saturated probably forgot
42
How is RCS pressure controlled following SI termination in ECA-3.3 SGTR without pressure control?
Charging flow equal to letdown
43
What is done with RCS pressure following complete SI flow reduction in ECA-3.2 SGTR with LOCA saturated recovery?
Depressurize to saturation to minimize primary to secondary leakage
44
What will cause the use of ECA-3.2 SGTR with LOCA Saturated recovery?
First 13 steps complete of ECA-3.1 and RWST level vs containment level from table
45
Why doesn't ECA-3.3 SGTR recovery without pressure control include PRZ level or RCS pressure on its SI termination criteria?
Not expected to be on scale and if it was it will lower when SI is terminated
46
In ECA-3.3 SGTR recovery without pressure control attempts to restore pressure control will continue until what one of two conditions terminates SI?
PRZ level on scale | Ruptured SG approaching overfill
47
How is primary to secondary leakage stopped in ECA-3.3?
Terminating SI and letting the RCS depressurize through the ruptured SG
48
What is required for natural circ verification?
``` TCold at Saturation for SG pressure CETC stable of lowering RCS pressure stable of lowering THot stable of lowering Subcooling ```
49
Why must AFW be initiated slowly to refill ruptured SG?
Cold AFW condensing steam and causing rapid depressurization
50
While performing cooldown to 350 degrees in ECA-3.3 why is charging flow controlled to maintain subcooling rather that PRZ level?
Raising charging flow to bring level on scale will raise leak rate
51
What is the fastest method to cooldown to 350 degrees in ECA-3.3?
Steam Dumps
52
When evaluating when to stop or realign the next peice of ECCS equipment during SI flow redution what is considered?
RCS pressure and Subcooling
53
How much subcooling is required to realign the last charging pump from the BIT header in ECA-3.1?
49 Degrees
54
While performing E-0 there is a faulted SG inside containment and there are high rad levels inside containment and high activity in the faulted SG. What is the procedure flowpath?
E-0 E-2 E-3 ECA-3.1
55
UFSAR assumptions for a SGTR?
~700gpm Single Tube LOOP

4. EOPs (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions