40EP-9EO08 Blackout Flashcards
What are the entry conditions for 40EP-9EO08 Blackout?
- Blackout (loss of all AC)
- Entered from SPTA’s
- Entered Directly from M 3/4 LTOP not in svc
What are the exit conditions for 40EP-9EO08 Blackout?
- SFSC’s not met AND not ELAP
- At least 1 PB energized (not from SBOG)
- SFSC’s met
During 40EP-9EO08 Blackout, what are the major mitigating steps?
- 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
During 40EP-9EO08 Blackout, what is considered and Extended Loss of AC Power (ELAP)?
- Loss of BOTH vital buses
- will NOT be restored in 1 hour
What is the controlling procedure for an ELAP?
- 40EP-9EO08 Blackout
What procedure initiates FLEX support?
- 40EP-9EO08 Blackout
- performed in parallel with SBO
How does ELAP coping strategy differ from 40EP-9EO08 Blackout strategy?
- ELAP assumes indefinite loss of AC vs 16 hours with SBO
- Uses FLEX equipment
What is the focus of FLEX strategy?
- 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
How much coping time do the SBOG’s provide?
16 Hours
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?
- Within 1 Hour
- PBA-S03
- Maintain DC power for AFA and ‘A’ ADV’s
What are the REQUIRED loads for SBO coping strategy?
- Class MCC’s
- CH pump (1)
- PZR Htrs (A)
- SP
- EW
- EC
- CR Ess AFU
- Swgr Ess AFU
With 1 SBOG aligned to PBA, what loads can be supported?
Coping loads and 1 of the following:
- AFA, E CH pump
- AFN, E CH pump
- AFA, A HPSI
For 40EP-9EO08 Blackout, what is the Reactivity Control Safety Function?
- < 2x10-4% ↔ or ↓
- All FSCEA inserted OR borating > 40 gpm OR SDM established
For 40EP-9EO08 Blackout, what is the Maintenance of Vital Auxiliaries Safety Function?
At least 1 train of Pk and PN
- PKA, PKC, and PNA
- PKB, PKD, and PNB
- Bus plus
For 40EP-9EO08 Blackout, what is the RCS inventory Control Safety Function?
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%
For 40EP-9EO08 Blackout, what is the RCS Press. Control Safety Function?
- P/T limits
OR - CET Subcooling < 44°F [60] superheat and not ↑
For 40EP-9EO08 Blackout, what is the Core Heat Removal Safety Function?
- Max Quadrant CET < 650°F (< saturation for PZR Safeties)
For 40EP-9EO08 Blackout, what is the RCS Heat Removal Safety Function?
- 1 SG 45-60% NR or restoring
- Tc ↔ or ↓
For 40EP-9EO08 Blackout, what is the Containment Isolation Safety Function?
- < 2.5 psig
- No valid CNTMT or 2° alarm or unexpected rise
For 40EP-9EO08 Blackout, what is the CNTMT Temp. and Press Control Safety Function?
- < 200°F
- < 2.5 psig
During 40EP-9EO08 Blackout, what E-plan classifications are used?
- Site Area Emergency
- General Emergency
During 40EP-9EO08 Blackout, What conditions would put you in a Site Area Emergency?
Site Area Emergency:
- Loss of offsite and onsite AC for 15 minutes
- Loss of all vital DS power for 15 minutes (<112vdc)
During 40EP-9EO08 Blackout, What conditions would put you in a General Emergency?
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
During 40EP-9EO08 Blackout, why do you actuate MSIS?
- Minimize RCS cooldown
- 2° vlvs may fail open
- Prevents Condenser damage
When restoring from a SBO what order is the SWYD restored?
- 1 line to East Bus
- Restore West Bus
- Align S/U XFMR
During 40EP-9EO08 Blackout, why do you place CH pumps in PTL?
- prevent uncontrolled seal injection
- prevent thermal shock to seals
During 40EP-9EO08 Blackout, how do you minimize RCS leakage?
Isolate the following:
- LD
- Seal BO
- RCS Sample vlvs
How much RCS leakage does our SBO coping strategy assume?
- 100-111 gpm
During 40EP-9EO08 Blackout, if unable to restore power to PB (offsite, DG or SBOG) within 1 HOUR what actions are required?
- Declare ELAP
- initiate Flex strategy
During 40EP-9EO08 Blackout, what doors do you open?
how long do you have to do so?
- MCR, Control Building - Ventilation not restored in 1 hour
- AFA - In an ELAP and not restored in 2 hours
During 40EP-9EO08 Blackout, if AFA doors are not opened during an ELAP how long until AFA fails?
- 4 hours
What are the indications for natural circulation?
- Loop ▲T < 65°F
- TC and Th ↔ or ↓
- ≥ 24°F [44] subcooled
- < 30°F ▲T b/w Th and max quadrant CET
During 40EP-9EO08 Blackout, what is the target SCM to maintain while slowly cooling down?
- 24-50°F [44-50]
- 50°F max for RCS inventory
During 40EP-9EO08 Blackout, while cooling down, how is SDM verified/ maintained?
- 50°F intervals
- Check Rx shutdown ≥ 1% for the NEXT 50°F Tc
During 40EP-9EO08 Blackout, when do you break vacuum and why?
- 20 minutes after TURBINE trip
- should be < 1200 RPM
During 40EP-9EO08 Blackout, if offsite power cannot be restored in 1 hour, what actions are required?
- Vent Generator H2
- NKN-M46 load shed
Following NKN-M46 load shed how long is the ESOP available?
- 7 hours
Following NKN-M46 load shed, how is control power aligned?
- U1 NKN-M45 (if SBOG aligned)
- U2/3 NKN-M46
During 40EP-9EO08 Blackout, What are the requirements to energize SWYD loads from a SBOG?
- Power not expected in 2 hours
- No Thunderstorm activity
During 40EP-9EO08 Blackout, when restoring a CH pump how do you prevent Thermal Shock to the RCP seals?
- Close seal inj. HX outlet vlv
- Slowly throttle open
During 40EP-9EO08 Blackout, if a vital bus will not be powered from offsite or a DG in 4 HOURS, what is required?
- Cooldown to SDC
