Brainscape's Knowledge GenomeTM

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


See full index

0. Biennial Written Prep > EOP Week 2 & 3 > Flashcards

EOP Week 2 & 3 Flashcards

Deck Covers: E-1, ECA-1.1, ECA-1.2, ECA-1.3, ES-1.1, ES-1.2, ES-1.3, ES-1.4, FR-Z.1, FR-Z.2, FR-Z.3

1
Q

What are the SI termination criteria given in ES-1.1 (SI Termination)

A
  • Subcooling greater than 40 deg F
  • Heat Sink Established (240k PPH OR 13% [28% ADVERSE] NR Lvl)
  • RCS Pressure Stable or Rising
  • Prz Level greater than 16% (20%) OR ADVERSE 28% (24%)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

While in E-1 (Loss of Reactor or Secondary Coolant) what actions are taken if the SG pressure boundary IS NOT intact

A
  • If the faulted SG IS NOT isolated then go to E-2 (Faulted SG)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

While in E-1 (Loss of Reactor or Secondary Coolant) what actions are taken if the SG levels are NOT intact

A
  • Maintain feed flow greater than 240k PPH until 13% [28% ADVERSE] NR Lvl
  • If level rises in an uncontrolled manner then go to E-3 (SG Tube Rupture)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

While in E-1 (Loss of Reactor or Secondary Coolant) what actions are taken if subcooling, heat sink, RCS pressure, and Pzr Level are satisfactory

A
  • Go to ES-1.1 (SI Termination)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

In E-1 (Loss of Reactor or Secondary Coolant) what is the purpose of the procedure loop that has you check:

  • SG Pressure Stable OR Rising
  • RCS Pressure Stable OR Lowering

AND what would the consequence be if you proceeded on with either condition NOT MET (i.e., instead of going to the RNO)

A
  • If SG Pressure is lowering then you need to re-check for a faulted SG
  • If RCS Pressure is Rising then you need to re-check if SI termination criteria are met
  • Proceeding past this step will transition you to ES-1.2 (Post LOCA Cooldown and Depressurization) which has MORE restrictive SI termination criteria than needed
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

While in E-1 (Loss of Reactor or Secondary Coolant) what actions are taken if Cold Leg Recirc capability is unavailable

A
  • Go to ECA-1.1 (Loss of Emergency Coolant Recirc)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

In E-1 (Loss of Reactor or Secondary Coolant) what actions are taken if there is an Aux Building LOCA

A
  • If ES-1.3 (transfer to Cold Leg Recirc) HAS been completed continue with E-1 (Loss of Reactor or Secondary Coolant) while the PET evaluates the leakage
  • If ES-1.3 (Transfer to Cold Leg Recirc) HAS NOT been completed go to ECA-1.2 (LOCA Outside Containment)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

In E-1 (Loss of Reactor or Secondary Coolant) what actions are taken if RCS pressure is greater than the shutoff head of the RHR pumps (300#)

A
  • Go to ES-1.2 (Post LOCA Cooldown and Depressurization)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

In E-1 (Loss of Reactor or Secondary Coolant) what actions are taken if RWST level is less than 30%

A
  • Go to ES-1.3 (Transfer to Cold Leg Recirculation)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

In E-1 (Loss of Reactor or Secondary Coolant) what actions are taken at 7 hours after the event

A
  • Go to ES-1.4 (Transfer to Hot Leg Recirculation)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

In ES-1.2 (Post LOCA Cooldown and Depressurization) what actions are taken if Cold Leg Recirc capability is unavailable

A
  • Go to ECA-1.1 (Loss of Emergency Coolant Recirculation)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

In ES-1.2 (Post LOCA Cooldown and Depressurization) what actions are taken if there is an Aux Building LOCA

A
  • Consult with the PET to determine source of leakage and go to ECA-1.2 (LOCA Outside Containment)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

While in ES-1.2 (Post LOCA Cooldown and Depressurization) what actions are taken if the SG levels are NOT intact

A
  • Maintain feed flow greater than 240k PPH until 13% [28% ADVERSE] NR Lvl
  • If level rises in an uncontrolled manner then go to E-3 (SG Tube Rupture)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

In ES-1.2 (Post LOCA Cooldown and Depressurization) after the cooldown is started and subcooling is verified greater than 40 deg F what actions is taken if ECCS is in service

A
  • RCS Depressurization using Pzr Spray/PORVs begins
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

In ES-1.2 (Post LOCA Cooldown and Depressurization) ANY time after SI has been reset AND ECCS pumps have been removed what actions are required if subcooling is lost OR Pzr Level is less than 20% [24% ADVERSE]

A
  • ECCS flow must be MANUALLY established
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

In FR-Z.1 (Response to High Containment Pressure) if ECA-1.1 (Loss of Emergency Coolant Recirc) is in effect what actions are required

A
  • Operate CTS in accordance with ECA-1.1 (Loss of Emergency Coolant Recirc) while continuing in FR-Z.1
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

When do you enter FR-Z.1 (Response to High Containment Pressure)

A
  • Anytime Containment Pressure has risen to greater than 2.8#
18
Q

While in E-1 (Loss of Reactor or Secondary Coolant) after transfer to Cold Leg Recirc is complete, what conditions would require a transition to ECA-1.3 (Sump Blockage)

A
  • 1 train of RHR/CTS and the low sump light is LIT

- Indications of cavitation on any RHR/CTS pump

19
Q

What are the four phases of a LBLOCA

A
  • Blowdown (RCS Press = Cont Press)
  • Refill (Water reaches bottom of fuel)
  • Reflood (CETC stop rising)
  • Long Term Recirc
20
Q

What are the three phases of a SBLOCA

A
  • Blowdown (Break flow = ECCS flow)
  • Reflood (CETC stop rising)
  • Long Term Recirc
21
Q

During a SBLOCA why is a Cold Leg Break the worst location for a break

A
  • The cross under piping creates a loop seal which prevents de-pressurization
22
Q

In ES-1.2 (Post LOCA Cooldown and Depressurization) why is more subcooling required when there are NO RCPs running

A
  • With no RCPs running cooling is by Natural Circ
  • Natural Circ results in colder CL temps
  • Colder CL temps means density is greater and therefore, more break flow
  • More break flow means a greater pressure reduction is required to establish equilibrium
  • Greater pressure reduction means more subcooling required
23
Q

Why are RCPs stopped when RCS pressure is less than 1300#

A
  • This ensures that they are stopped before the break is uncovered.
  • Since RCP busses are non-safety have to assume they will be lost.
  • If lost after the break is uncovered, more mass loss would occur uncovering more fuel (2 phase flow would separate)
24
Q

What are the time critical actions during ES-1.3 (Transfer to Cold Leg Recirc)

A
  • 5 minutes with no RHR flow (no challenge to PCT)
  • 5 minutes with no CTS flow
  • 15 minutes to split CCW to prevent runout
  • 5 minutes to isolate CTS from SAT
25
Q

Why are you required to wait 50 minutes before establishing RHR spray

A
  • Allows adequate time for decay heat removal
26
Q

Why are you required to wait 6 hours to place H2 recombiners in service

A
  • To avoid peak containment pressure at 6 hours (heat input)
27
Q

Why is CTS/RHR spray required to be in service for 24 hours

A
  • Minimize control room dose
28
Q

During a SI how long do you have to start and continuously monitor PACHMS

A
  • 90 minutes
29
Q

What size hole in the RCS is considered a SBLOCA

A
  • Greater than 3/8”
30
Q

What size hole in the RCS is considered a LBLOCA

A
  • Greater than 1 ft^2
31
Q

What are the 10 CFR 50.46 ECCS acceptance criteria

A
  • 2200 deg F Peak Clad Temperature
  • 17% cladding oxidation
  • 1% H2 generation
  • Coolable geometry
  • Long Term Cooling
32
Q

What is reflux cooling/boiling

A
  • Break doesn’t removal all the heat
  • RCS is saturated
  • Steam in the SG tubes condenses and falls back through the HL
  • No natural circ
33
Q

What is the unique indication for a Pressurizer Steam space LOCA (e.g., Open PORV)

A
  • Pressurizer Level will rise due to RCS at saturation causing swell
  • Pressurizer Pressure will lower
34
Q

What are the time critical actions on an inadvertent SI

A
  • 15 minutes stop all but 1 CCP
  • 17 minutes Isolate BIT
  • 35.5 minutes establish normal charging and LD
35
Q

WHY are there time critical actions associated with an inadvertent SI

A
  • Prevents the pressurizer from going water solid and putting water through the PORVs
36
Q

What will generate a RED path for FR-Z.1 (Response to High Containment Pressure)

A
  • Containment pressure greater than 12#
37
Q

What will generate an ORANGE path for FR-Z.1 (Response to High Containment Pressure)

A
  • Containment pressure greater than 2.8#
38
Q

What will generate an ORANGE path for FR-Z.2 (Response to Containment Flooding)

A
  • Containment Water Level “Flood Level” status light LIT
39
Q

What color is generated to indicate a need to enter FR-Z.3 (Response to Containment Radiation Levels)

A
  • YELLOW
40
Q

In ES-1.1 (SI Termination) if subcooling is lost what action is required

A
  • Manually initiate ECCS flow as required AND transition to E-1
41
Q

While in ES-1.2 (Post LOCA Cooldown and Depressurization) what actions can be taken in the RNO if subcooling IS NOT met to remove CCPs/SI PPs

A
  • IF RCS HL temperatures are less than 340 deg F (RHR entry condition), THEN verify one RHR pump running AND remove CCP/SI anyway
  • Basically, if you meet RHR entry conditions based on HL temperatures AND RHR is in service you can go ahead and remove the CCPs and SI PPs anyway since RHR will ensure subcooling
42
Q

While in ES-1.2 (Post LOCA Cooldown and Depressurization) if the RCS is saturated, why does the RCS cooldown come before the RCS depressurization

A
  • To restore subcooled conditions so that the depressurization is effective
  • (Depressurizing under saturated conditions WILL NOT actually lower pressure, it will only cause inventory loss)

0. Biennial Written Prep (12 decks)

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