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4. EOPs > E-0 Daily Quiz > Flashcards

E-0 Daily Quiz Flashcards

1
Q

What are E-0 Major Action Categories?

A

1) Verify auto actions
2) Identify optimal recovery (E-1, E-2, E-3, E-1)
3) Shutdown Equipment and continue identification of appropriate recovery procedure

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2
Q

E-0 Foldout Page

A

1) Cold Leg Recirc
2) AFW switchover
3) RCP Trip - Phase B or RCS 1300# and SI or CCP Run
4) Faulted SG AFW Isolation - If 1 faulted SG and heat sink stop AFW to faulted

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3
Q

E-0 Immediate Actions

A

1) Check Reactor Trip > RNO manual check log pwr <5% and neg startup rate
2) Check Turbine Trip > RNO manual, amsac, sgsv
3) Check A/C Emergency Buses > RNO ECA 0.0 or sups if A/D energized
4) Check SI > RNO check required ES0.1 Rx Trip

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4
Q

TDAFP Drop 50 vs Drop 10

A

If both drop 50 and drop 10 are lit, attempt to reset drop 50. If it clears the TDAFP tripped on electronic overspeed. If standing local action is required.

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5
Q

E-0 SI termination criteria

A

Sub-cooling > 40F
Heat Sink
RCS Pressure stable or rising
PRZ Level

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6
Q

What actuates SI

A

Cnmt P > 1# on 2/3 ch
Pressurizer P Low 1775# 2/3 ch
Stmline d/p 100 psid 1 less than 2 others
Stmline Low P 500 pig 1/1 on 2 SGs

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7
Q

If the Rx power cannot be verified < 5% or negative startup rate in E-0, where do you go?

A

FR-S.1

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8
Q

Prior to tripping the turbine (RNO E-0) what should you check?

A

That the RX is tripped

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9
Q

What is the duration of the CTS timer?

A

U1 4 min / U2 30s

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10
Q

E-0 why trip RCPs when RCS P < 1300#

A

Minimize RCS mass loss due to SMBLOCA

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11
Q

E-0 - Order of Diagnostics and why?

A

E-1 If PORV stuck open
E-2 Easy to find / fix and masks other issues
E-3 Stop offsite dose a lot of TCAs
E-1 Auto will manage

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12
Q

E-0 Why limit AFW between 240 and 450K pph?

A

240 pph = maintain min AFW for heat sink

450 pph = prevent overcool RCS

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13
Q

E-0 Modes of applicability

A

Rx trip Mode 1 and 2

SI Mode 1-3

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14
Q

When can ES-0.0 be entered and why would you?

A

SI is required, E-0 has been exited and an E series procedure is in progress

ES0.0 can be implemented in the event one is in the incorrect procedure

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15
Q

ES0.0 Major Action Categories

A

1) Check SG not Faulted
2) Check SGs not Faulted and not isolated
3) Check SGTR

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16
Q

ES0.1 Major Action Categories

A 
1) Primary stable at no load
Borate U1 150 ppm U2 160 ppm / rod stuck
2) Secondary stable at no load
3) Ensure Power is available
4) Establish / Maintain forced circ of RCS
5) Maintin RCS stable
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17
Q

ES0.1 FOP

A

SI Actuation
AFW switchover
E-0 transition

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18
Q

ES0.1 why reset AMSAC?

A

The TDAFP is required to be operable in Mode 3. A standing AMSAC signal locks out auto start of TDAFP.

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19
Q

ES0.1 why transfer stm dumps to stm pressure mode?

A

Prevent large RCS temperature oscillation due to long transit time of RCS inventory (natural circ)

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20
Q

What is P-6?

A

ON - Any IR > 10^-10
OFF - 2/2 IR < 6x10^-11

Allows manual SR hi flux trip block

21
Q

When is ES0.1 entered?

A

No SI actuated or required

22
Q

ES0.2 Major Action Categories

A

1) Try to start RCPs
2) C/D and depress RCS w/ no void growth
3) Lock out SI (Accum RCS<100# LTOP and SI pump when RCS is < 350F)
4) Place RHR I/S (RCS Temp <350F and 350-400#)
5) Cool down to cold shutdown 25F/hour w/ RHR

23
Q

ES0.2 Is entered when?

A

Natural Circ cool down is required

24
Q

ES0.2 FOP

A 
SI Actuation (SI will get blocked = you initiate) 
AFW switchover
ES0.3 is voids expected
E-0 if SI occurs
RCP restart
25
Q

ES0.2 what are the sub cooling limits?

A

> 90F if CRDMs are running

>220F is less than all CRDMs

26
Q

ES0.2 what if Cold Shutdown boron is not achieved in step 3?

A

Loop back to step 2 and wait until adequate SDM

27
Q

ES0.2 what is basis of 25F / hr cool down rate?

A

Ensures Rx vessel heads cool with RCS and no voids form in Rx vessel

28
Q

ES0.2 what will be used to depress the RCS?

A

Aux Spray. Normal Spray will be unavailable bc no RCPs

29
Q

ES0.2 How do we verify no voids in vessel?

A

RVLIS Upper Plenum level >92%

30
Q

How is Aux Spray controlled?

A

Opening the Normal PRZ spray lowers Aux. Closing normal spray raises aux.

31
Q

ES0.2 Why are SI pumps locked out at 350F?

A

LTOP

32
Q

ES0.3 Major Action Categories

A

1) Try to start RCP - Do not if seal inj. was lost
2) Cool down and depress RCS monitor void growth
3) Lockout SI (Accum <1000# RCS and SI <350F RCS)
4) Place RHR in service (RCS <350F and 350-400#)
5) Cooldown to cold shutdown 100F / hr

33
Q

When can you enter ES0.3

A

Borated to cold shutdown and blocked low P SI (first 13. steps ES0.2)

34
Q

What is P-11?

A

2/3 PRZ P <1910# allows SI low PRZ P block

35
Q

ES0.3 FOP

A

SI Actuation
AFW Switchover
E-0 if SI occurs
RCP Restart Criteria

36
Q

ES0.3 Cool down rate?

A

100F / hr

37
Q

ES0.3 Cool down rate?

A

100F in 60 minutes

38
Q

ES0.3 what are the PRZ lvl limits and why?

A

> 34 (37)% heaters covered

<90% maintain sum bubble

39
Q

SUP11 What are the indication of Nat Circ?

A

1) RCS Subcooling >40F
2) Stable or Lowering: SG P, RCS HL, CETCs
3) RCS CL temp at saturation for SG Pressure

40
Q

SUP10 Why attempt RCP restart?

A

RCS mixing, RCS temp / press control, improves PRZ lvl control

41
Q

What three factors impact Spray Flow?

A

Vessel and RCS Piping dp, PRZ lvl, coolant velocity head at spray flow scoop

42
Q

What three factors impact PRZ Spray Flow?

A

Vessel and RCS Piping dp, PRZ lvl, coolant velocity head at spray flow scoop

43
Q

SUP10 How do we minimize loss of sub cooling / maintain RCS pressure control during RCP start?

A

Raise PRZ level >37%
Raise Subcooling 40F (Level and sc are RCP restart criteria)
Raise Pressure to shrink bubble
Saturate PRZ Liquid using heaters

RCP restart criteria ensure no SMBLOCA

44
Q

SUP10 What if RVLIS is <92% during start?

A

There is a void in the vessel head. Raise PRZ level to 84% and sub cooling >62F. This will ensure adequate inventory when the void collapses

45
Q

SUP10 what if the void is swept into the loops?

A

Degraded primary to secondary heat transfer - voids swept into sg u-tubes

46
Q

RX trip on natural circ. What will happen to RCS parameters?

A

Tavg will lower, Core Delta T will lower, and TCold will rise

47
Q

Why is RCP 3 the desired RCP to start?

A

Most flow bc greatest d/p between spray and surge line

48
Q

What happens if you exceed a Safety Limit 2.1.2 RCS Pressure >2735

A

Mode 1 or 2: Immediate correct and Mode 3 in 1 hour

If mode 3-5: restore within 5 min

4. EOPs (10 decks)

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