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Public 2022 > 40EP-9EO08 Blackout > Flashcards

40EP-9EO08 Blackout Flashcards

1
Q

What are the entry conditions for 40EP-9EO08 Blackout?

A
  • Blackout (loss of all AC)
  • Entered from SPTA’s
  • Entered Directly from M 3/4 LTOP not in svc
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2
Q

What are the exit conditions for 40EP-9EO08 Blackout?

A
  • SFSC’s not met AND not ELAP
  • At least 1 PB energized (not from SBOG)
  • SFSC’s met
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3
Q

During 40EP-9EO08 Blackout, what are the major mitigating steps?

A
  • Address loss of all AC and ELAP
  • RCS Heat removal with AFA and ADV’s
  • Restore power
  • IF offsite or DG not restored use SBOG to power PB WITHIN 1 hour
  • Maintain RCS subcooling with limited C/D
  • 4 hours no offsite or DG C/D to SDC
  • 8 hours no offsite or DG SFP cooling restored
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4
Q

During 40EP-9EO08 Blackout, what is considered and Extended Loss of AC Power (ELAP)?

A
  • Loss of BOTH vital buses

- will NOT be restored in 1 hour

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5
Q

What is the controlling procedure for an ELAP?

A
  • 40EP-9EO08 Blackout
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6
Q

What procedure initiates FLEX support?

A
  • 40EP-9EO08 Blackout

- performed in parallel with SBO

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7
Q

How does ELAP coping strategy differ from 40EP-9EO08 Blackout strategy?

A
  • ELAP assumes indefinite loss of AC vs 16 hours with SBO

- Uses FLEX equipment

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8
Q

What is the focus of FLEX strategy?

A
  • C/D RCS to stable Tc
  • High enough for heat for AFA steam
  • Low enough for 1 CH > RCP seal leakage
  • RCS C/D / depressurize reduces inventory loss
  • Class DC load shed
  • Install 480 V DG’s
  • Designed to be “flexible” can perform steps out of order, SM/CRS permission
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9
Q

How much coping time do the SBOG’s provide?

A

16 Hours

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10
Q

If offsite or any DG cannot be aligned to PB buses during 40EP-9EO08 Blackout how long do you have to align SBOG’s?
Where is it aligned?
Why?

A
  • Within 1 Hour
  • PBA-S03
  • Maintain DC power for AFA and ‘A’ ADV’s
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11
Q

What are the REQUIRED loads for SBO coping strategy?

A
  • Class MCC’s
  • CH pump (1)
  • PZR Htrs (A)
  • SP
  • EW
  • EC
  • CR Ess AFU
  • Swgr Ess AFU
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12
Q

With 1 SBOG aligned to PBA, what loads can be supported?

A

Coping loads and 1 of the following:

  • AFA, E CH pump
  • AFN, E CH pump
  • AFA, A HPSI
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13
Q

For 40EP-9EO08 Blackout, what is the Reactivity Control Safety Function?

A
  • < 2x10-4% ↔ or ↓

- All FSCEA inserted OR borating > 40 gpm OR SDM established

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14
Q

For 40EP-9EO08 Blackout, what is the Maintenance of Vital Auxiliaries Safety Function?

A

At least 1 train of Pk and PN

  • PKA, PKC, and PNA
  • PKB, PKD, and PNB
  • Bus plus
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15
Q

For 40EP-9EO08 Blackout, what is the RCS inventory Control Safety Function?

A

Condition 1:

  • Lpzr 10-65 [16-64]%
  • ≥ 24°F [44] subcooled
  • RVUH ≥ 16%

Condition 2:

  • CET Subcooling < 44 [60]°F superheated and NOT ↑
  • Outlet plenum ≥ 21%
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16
Q

For 40EP-9EO08 Blackout, what is the RCS Press. Control Safety Function?

A
  • P/T limits
    OR
  • CET Subcooling < 44°F [60] superheat and not ↑
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17
Q

For 40EP-9EO08 Blackout, what is the Core Heat Removal Safety Function?

A
  • Max Quadrant CET < 650°F (< saturation for PZR Safeties)
18
Q

For 40EP-9EO08 Blackout, what is the RCS Heat Removal Safety Function?

A
  • 1 SG 45-60% NR or restoring

- Tc ↔ or ↓

19
Q

For 40EP-9EO08 Blackout, what is the Containment Isolation Safety Function?

A
  • < 2.5 psig

- No valid CNTMT or 2° alarm or unexpected rise

20
Q

For 40EP-9EO08 Blackout, what is the CNTMT Temp. and Press Control Safety Function?

A
  • < 200°F

- < 2.5 psig

21
Q

During 40EP-9EO08 Blackout, what E-plan classifications are used?

A
  • Site Area Emergency

- General Emergency

22
Q

During 40EP-9EO08 Blackout, What conditions would put you in a Site Area Emergency?

A

Site Area Emergency:

  • Loss of offsite and onsite AC for 15 minutes
  • Loss of all vital DS power for 15 minutes (<112vdc)
23
Q

During 40EP-9EO08 Blackout, What conditions would put you in a General Emergency?

A

Loss of offsite and onsite AC and 1 of the following:

  • Restoration in < 4 hours not likely
  • Rep CET >1200°F

Loss of offsite and onsite AC and DC (<112 vdc) for ≥ 15 minutes

24
Q

During 40EP-9EO08 Blackout, why do you actuate MSIS?

A
  • Minimize RCS cooldown
  • 2° vlvs may fail open
  • Prevents Condenser damage
25
Q

When restoring from a SBO what order is the SWYD restored?

A
  • 1 line to East Bus
  • Restore West Bus
  • Align S/U XFMR
26
Q

During 40EP-9EO08 Blackout, why do you place CH pumps in PTL?

A
  • prevent uncontrolled seal injection

- prevent thermal shock to seals

27
Q

During 40EP-9EO08 Blackout, how do you minimize RCS leakage?

A

Isolate the following:

  • LD
  • Seal BO
  • RCS Sample vlvs
28
Q

How much RCS leakage does our SBO coping strategy assume?

A
  • 100-111 gpm
29
Q

During 40EP-9EO08 Blackout, if unable to restore power to PB (offsite, DG or SBOG) within 1 HOUR what actions are required?

A
  • Declare ELAP

- initiate Flex strategy

30
Q

During 40EP-9EO08 Blackout, what doors do you open?

how long do you have to do so?

A
  • MCR, Control Building - Ventilation not restored in 1 hour
  • AFA - In an ELAP and not restored in 2 hours
31
Q

During 40EP-9EO08 Blackout, if AFA doors are not opened during an ELAP how long until AFA fails?

A
  • 4 hours
32
Q

What are the indications for natural circulation?

A
  • Loop ▲T < 65°F
  • TC and Th ↔ or ↓
  • ≥ 24°F [44] subcooled
  • < 30°F ▲T b/w Th and max quadrant CET
33
Q

During 40EP-9EO08 Blackout, what is the target SCM to maintain while slowly cooling down?

A
  • 24-50°F [44-50]

- 50°F max for RCS inventory

34
Q

During 40EP-9EO08 Blackout, while cooling down, how is SDM verified/ maintained?

A
  • 50°F intervals

- Check Rx shutdown ≥ 1% for the NEXT 50°F Tc

35
Q

During 40EP-9EO08 Blackout, when do you break vacuum and why?

A
  • 20 minutes after TURBINE trip

- should be < 1200 RPM

36
Q

During 40EP-9EO08 Blackout, if offsite power cannot be restored in 1 hour, what actions are required?

A
  • Vent Generator H2

- NKN-M46 load shed

37
Q

Following NKN-M46 load shed how long is the ESOP available?

A
  • 7 hours
38
Q

Following NKN-M46 load shed, how is control power aligned?

A
  • U1 NKN-M45 (if SBOG aligned)

- U2/3 NKN-M46

39
Q

During 40EP-9EO08 Blackout, What are the requirements to energize SWYD loads from a SBOG?

A
  • Power not expected in 2 hours

- No Thunderstorm activity

40
Q

During 40EP-9EO08 Blackout, when restoring a CH pump how do you prevent Thermal Shock to the RCP seals?

A
  • Close seal inj. HX outlet vlv

- Slowly throttle open

41
Q

During 40EP-9EO08 Blackout, if a vital bus will not be powered from offsite or a DG in 4 HOURS, what is required?

A
  • Cooldown to SDC

Public 2022 (46 decks)

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