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Sheftic Stack > EOPFirst > Flashcards

EOPFirst Flashcards

1
Q

The frequency to qualify for consideration in the EOP network is:

A

10 E-8 events / reactor year

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2
Q

When is the foldout page criteria applicable?

A

Any time THAT procedure is in effect

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3
Q

What are the conditions and exit criteria for Adverse Containment?

A
  1. Containment Pressure 5+ psig. Can be exited as soon as pressure drops below
  2. Radiation level of 1E5 R/hr. Once level drops below, must be evaluated for integral dose. If Accumulated dose >10E6 R/hr, equipment has been physically damaged.
  3. During ELAP until PRZ and SG temps are verified below 196.8*F
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4
Q

What’s the procedural hierarchy?

A
  1. FRGs Red/Orange (unless ECA-0 or ES-1.3)
  2. EOPs
  3. Emergency Remote Procedures
  4. AOPs
  5. ARPs
  6. NOPs
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5
Q

If a contingency action cannot be performed, what must be done?

A

The crew must proceed to the next step or sub step in the left hand column

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6
Q

What’s the order of priority for the Critical Safety Functions?

A

S - Subcriticality

C - Core Cooling

H - Heat Sink

P - Integrity

Z - Containment

I - Inventory

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7
Q

If you have an Orange path on a CSF, how often must it be monitored?

A

Continuously

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8
Q

If you have an Red path on a CSF, how often must it be monitored?

A

Continuously

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9
Q

If you have an Yellow path on a CSF, how often must it be monitored?

A

Not satisfied, Every 10-20 mins

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10
Q

If you have an Green path on a CSF, how often must it be monitored?

A

Satisfied - Every 10-20 mins

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11
Q

If Containment CSF has a Red path and Core Cooling has an orange path, which is the higher priority?

A

Containment. A RED path has more urgency than any other color.

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12
Q

Who has the responsibility for switching from the NOP to the EOP status tree monitoring when there is an event?

A

STA

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13
Q

What are the fission product barriers?

A
  1. Fuel Cladding
  2. RCS
  3. Containment
  4. E-Plan
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14
Q

If an FRG is entered (writing in the procedure), can it be exited if the CSF turns green?

A

NO!

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15
Q

What are indications of a Faulted SG?

A

Tave Drops

RCS Pressure Lowering

PRZ Level Lowering

SG Pressure / Temp Lowering

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16
Q

What are the indications of a SGTR?

A

RCS Pressure Lowering

Rad Alarms on SJAE and Gland Steam Condenser Monitors

SG Level rising uncontrollably

PRZ Level Lowering

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17
Q

What are the indications of a LOCA?

A

Containment pressure rising

Dew point Rising

Containment Rad Monitor Alarm

RCS Pressure lowering

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18
Q

What are the normal Post Trip conditions of the following?

RCS Subcooling

WR Log Power

WR SUR

PRZ Level

RCS Pressure

SG Pressures

SG Levels

RCS Tave

A

RCS Subcooling > 40 *F. Rises to 95 *F rapidly then to 100 *F

WR Log Power < 5%

WR SUR Negative

PRZ Level Drops to 25% then to 22%

RCS Pressure Gradually returns to pre-trip conditions

SG Pressures ~1000 psig

SG Levels - off-scale low

RCS Tave 547 *F

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19
Q

What are the modes of applicability for E-0?

A

Rx Trip - Modes 1 & 2

SI - Modes 1-3

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20
Q

What are the Entry Conditions for E-0?

A

Any RPS Signal Exceeds setpoint

Any SI Signal

Manual Rx Trip

Direct Entry

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21
Q

What are the Major Action Categories for E-0

A
  1. Verify auto actions of safeguards systems
  2. Identify appropriated Optimal Recovery Procedure
  3. Shutdown unnecessary Equipment and continue to identify ORP
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22
Q

What is the E-0 FOP Criteria?

A
  1. CL Recirc - 30% RWST Level
  2. AFW Switchover - 15% CST
  3. RCP Trip - Phase B or RCS Pressure at 1300 psig AND CCP or SI Pump Running
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23
Q

What’s the reasoning for Tripping a RCP during a phase B?

A

RCP Motor bearing will overheat because CCW flow to RCP LO Coolers has been isolated

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24
Q

What are the order of diagnostic transitions from E-0 and why?

A

E-2, Easy to find/fix, Impacts many CSFs and Masks other issues

E-3, Stop offsite dose, Unique, Detailed Actions

E-1, AUTO Actions handle it

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25
Q

What are the transitions for E-0?

A

FR-S.1

ECA-0.0

ES-0.1

FR-H.1

FRP-S.1

ES-1.1

E-1

E-2

E-3

ECA-1.2

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26
Q

Why would you enter FR-S.1 from E-0?

A

MT Trips but unsuccessful Rx Trip

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27
Q

If the main turbine trips but the Rx does not, what is the E-Plan Call?

A

Alert of SEA for RPS Failure

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28
Q

What’s the time limit for that power cannot be established to 1+ safeguards bus for an E-plan call?

A

> 15 mins

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29
Q

When would you enter ES-0.1 from E-0?

A

If an SI is not actuated nor required…

30
Q

When would you enter E-1 from E-0?

A

If a PORV / Block valve cannot be closed

LOCA

RCS pressure below RHR Shutoffhead

31
Q

What are the immediate actions of E-0?

A

Verify Rx Tripped

Verify Turbine Tripped

Verify Power to AC Emergency Buses

Check SI Status

32
Q

Why do we lower AFW Flow to < 450,000 ppl?

A

Limits over cooling the RCS

33
Q

Whey do we maintain AFW Flow > 240,000 ppm until SG water level is obtained?

A

Ensure enough flow for decay heat removal

Key number for Heat Sink CSF

34
Q

What is the ECCS Termination Criterion?

A

Subcooling >40*F

Heat Sink SG > 13%

RCS Pressure stable or rising

PRZ Level

35
Q

What are the Entry Conditions for ES-0.0, Rediagnosis

A

Operator doubt as to which procedure should be in effect

ALL of the following are met:

  1. SI is I/S or required
  2. E-0 has been exited
  3. E-Series EOP is in progress
36
Q

What are the ES-0.0, Rediagnosis Major Action Categories?

A
  1. Check if any SGs are not faulted
  2. Check if any SG is faulted and if it was not isolated
  3. Check if there is a SGTR
37
Q

What are all possible Transitions from ES-0.0, Rediagnosis?

A

E-1 or ECA-1

E-2

E-3 or ECA-3

ECA-2.1

38
Q

When would you enter E-1 from ES-0.0, Rediagnosis?

A

No indications of Tube Rupture

39
Q

When would you enter E-2 from ES-0.0, Rediagnosis?

A

MSIVs open and ALL SG pressures lowering uncontrollably

Faulted and not isolated SG

40
Q

When would you enter E-3 from ES-0.0, Rediagnosis?

A

High Rad or SG Level Rising Uncontrollably

41
Q

When would you enter ECA-2.1 from E-0.0, Rediagnosis?

A

MSIVs shut and ALL SG pressures lowering uncontrollably

42
Q

What are the FOP criterion for ES-0.0, rediagnosis?

A

SI Actuation

AFW Swtichover

E-0 Transition if SI actuates

43
Q

What is to preferred order of water sources for AFW switchover?

A
  1. Other unit’s CST

2. CST crosstie with opposite’s pump

44
Q

What are the Entry Conditions for ES-0.1, Rx Trip Response?

A

From E-0, Step 4 when SI is neither actuated nor required

45
Q

What are the Major Action Categories for ES-0.1, Rx Trip Response?

A
  1. Ensure Primary Stabilizes at No Load Conditions
  2. Ensure Secondary Stabilizes at No Load Conditions
  3. Ensure power is available to necessary components
  4. Establish / Maintain Forced Circ of the RCS
  5. Maintain stable RCS conditions
46
Q

How much do you borate for each control rod not fully inserted?

A

U1- 160 ppm

U2- 150 ppm

47
Q

What is the FOP Criteria for ES-0.1, Rx Trip Response?

A

SI Actuation Criteria

AFW Switchover Criteria

E-0 Transition if SI actuates

48
Q

What are the potential transitions from ES-0.1, Rx Trip Response?

A

E-0, Step 1 if spurious SI occurs

ES-0.2 if natural circ cooldown is required

49
Q

What’s the purpose of resetting AMSAC during the Rx Trip Response?

A

To clear the lockout of the TDAFP auto start

TS 3.7.5, TDAFP needed in M3

50
Q

What are the Entry Conditions for ES-0.2, Natural Circ Cooldown?

A

From ES-0.1 and ECA-0.1 if a natural circ cooldown is required

From ES-0.3 if the first 13 steps of ES-0.2 have not yet been performed

51
Q

What do the first 13 steps of ES-0.2, Natural Circ Cooldown accomplish?

A

Borate to cold shutdown and block the low pressure SI

52
Q

What are the Major Action Categories of ES-0.2, Natural Circ Cooldown?

A
  1. Try to start an RCP (forced circ is better)
  2. Cooldown and depressurization the RCS with no void growth
  3. Lockout SI
  4. Place RHR I/S (<350*F and 350-400 psig)
  5. Cooldown to cold shutdown (25*F per hour with RHR)
53
Q

What’s the FOP Criteria for ES-0.2, Natural Circ Cooldown?

A

SI actuation Criteria - < 40*F subcooling

AFW Switchover- 15% CST

RCP Restart

ES-0.3 transition if voids are expected

E-0 if SI occurs

54
Q

What are the transitions from ES-0.2, Natural Circ Cooldown

A

ES-0.3, Natural Circ Cooldown w a steam void after step 13 IF CST inventory is low

and after loss of offsite power when a high rate of planned cooldown and depressurization is required due to reduced CST inventory

55
Q

In ES-0.2, Natural Circ Cooldown, what is down if SDM is inadequate?

A

Procedure loop that requires operator to continue berating until cold shutdown boron concentration is established and verified

56
Q

At the onset of Natural Circ, what is removing MOST the heat from Reactor Vessel Head?

57
Q

If ALL CRDMs are running, what is the minimum subcooling requirement?

58
Q

If less than all CRDMs are running, what is the minimum subcooling requirement?

A

220*F to prevent possible void formation in upper head

59
Q

Inoperable CRDMs means….

A

Total upper head area cooldown rate will be less, so greater subcooling must be maintained.

60
Q

What’s the entry condition for ES-0.3, Natural Circ Cooldown with steam void in vessel with RVLIS?

A

ONLY from ES-0.2, after completion of the first 13 steps

61
Q

What are the FOP Items for ES-0.3, Natural Circ Cooldown with Steam Void in Vessel with RVLIS?

A

SI Actuation Criteria

AFW Switchover

E-0 if SI occurs

RCP Restart Criteria

62
Q

Why do we want to restart an RCP if all are stopped?

A

Enhance core heat removal

Improves RCS Pressure and Temp Control

Improves PRZ Level Control

63
Q

Why is RCP 3 the most effective RCP for PRZ Spray

A

Most dP bc it is in the loop with the surge line

64
Q

What’s necessary to restart an RCP?

A

1 Seal dP > 200 psig

No Void

Power to the Bus

RCP Cooling

Thermal Barrier Cooling water dP high alarms clear

Bearing lift pump running for 2 mins

65
Q

What could happen if you start an RCP with a steam void in the upper head?

A

Reduced subcooling

Moves void to PRZ or SG Tubes

66
Q

What is the main indication of Natural Circ?

A

RCS Subcooling based on CETCs > 40*F

67
Q

What are all the indications of Natural Circ?

A

RCS Subcooling > 40*F

Stable or Lowering:

  • SG Pressures
  • RCS HL Temps
  • CETCs

RCS CL Temps at saturation temp for SG Pressure

68
Q

If you can’t verify Natural Circ, what do you do?

A

Raise steam dump flow

69
Q

What is the expected parameters for the following during Natural Circ?

RCS dT

RCS Subcooling

SG Pressures

A

RCS dT- rises 20-30F, so Tave ~ 15F higher

RCS Subcooling - Drops to about 60-70*F

SG Pressures - Stabilizes at 1025 psig on PORVs

70
Q

What are the physical requirements for Natural Circ?

A

Heat Sink higher elevation than Heat Source and a flowpath between the 2

Density gradients must exist

Sheftic Stack (79 decks)

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