40AO-9ZZ21 Acts of Nature Flashcards
What are the entry conditions for 40AO-9ZZ21 Acts of Nature Severe Weather?
National Weather Service issues the following for Western Maricopa County:
- High Wind Warning
- Severe Thunderstorm warning
- Tornado watch or warning
- ≥ 50mph wind or gusts
- Tornado Sighted near PA
For 40AO-9ZZ21 Acts of Nature, what MUST be complete before exiting?
- Condition has ended
- ** Vertical Concrete Cask inspection is complete **
What compensatory action must be taken if severe weather could affect SWYD / off site power during an extended DG Completion Time?
- AO ready at the SBOG’s
How is Significant Dust Storm defined?
- Unable to see MET tower equipment hatch platform
If there is a significant dust storm what actions must be taken?
why?
- Secure Refueling Purge in negative pressure mode
- Prevents dust from entering CNTMT, FME concerns
What mitigating actions are taken for Severe Weather?
- Suspend non-essential unit ops
- Secure loose materials
- Lower Crane booms
- Suspend Fuel Handling
- AFW in svc and recirc lines damaged - IMMEDIATELY actions for SDC
Tornado:
- Close missile shield doors
- Close CTMT Equip hatch
- Close outside entrances to buildings
- Stop AFN and close Suctions
Heavy Rain ( >10”)
- Flood Barrier deployment
- WRF open all drainage ditch gates
Following a Tornado in/ near PA what damage inspections are required?
- SP nozzles
- SP X-tie vlvs
- Cont. Bldg HVAC
- DG FOST’s
- AFW Recirc lines
For 40AO-9ZZ21 Acts of Nature what are the 2 Event classification levels?
What conditions determine what classification level?
Unusual Event, Alert
Unusual Event:
- Seismic > OBE
- Tornado inside PA
- Flooding requiring electrical isolation
- Personnel movement inside PA impeded
- Access to site via personal vehicle impeded
Alert:
- Hazardous event WITH
- Indication of degraded safety system
- Visible damage to safety system
For 40AO-9ZZ21 Acts of Nature, what are the entry condition for Seismic event?
- Felt by Unit 1 CR
- Waves in SFP
- Entered with or without seismic alarm
What actions are taken by CR staff following a seismic event?
- STA Checks Condor
- Red Light FBA reached setpoint and started recorder
- Yellow Light OBE light
- Level 1 Eval by STA
- Level 2 Eval by Civil Engineering complete within 7 days if > OBE
Following a seismic event how long do you have to perform a functional test of FBA?
- within 5 days
How is a “False Alarm” determined when checking Condor following a seismic event?
- Not felt on site
- Look at SFP for waves
What are the major mitigating actions following a seismic event?
- U1 evaluate E-Plan
- WRF inspect evap pond dams
- STA analyses
- Secure SI SFP augment cooling
- RP monitor Fuel Building rads
- Eval if shutdown or trip is req’d
- Monitor SFP level
- STOP AFN and close suctions
- Stop and isolate RFP clean up
- AO walkdowns (AFN suction piping)
- Evaluate RCS leakage
- AFA/B non-seismic instrument inspections (6 hours)
- SFP Liners (7 hours)
How is SSE Safe Shutdown Earthquake defined?
Worse case earthquake for area, plant maintains:
- RCS pressure boundary
- Ability to and maintain safe shutdown conditions
- Prevent/ mitigate consequences of accidents
How is OBE Operating Basis Earthquake defined?
- Earthquake that could reasonably be expected to affect the site during operating life of the plant
- Features necessary for operation without undue risk to health and safety of public remain functional
