40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK) Flashcards
During 40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK), what are the major mitigating actions for a loss of NKN-M45
- Rx trip required
- Manually open Main Generator output brkr
- NAN-S01/02 lost
- Close MSIV
- Use AFW/ADV for SG’s
- Locally operate PZR htr brkrs
- Align CH suct through 536
- Restore LD
- Perform Loss of HVAC
- Align NAN-S05 control power to NKN-M46
During 40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK), what are the major effects for a loss of NKN-M46
- RCP Control power lost
- Loss of Emergency oil pumps
- Loss of S/U XFMR protective relaying
- Loss of control power to NAN-S06
During 40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK), what are the major mitigating actions for a loss of NKN-D41
- Reduce turbine load to maintain < 100%
- Reduce power to maintain MFP suct. press > 300 psig
- Monitor Hotwell level
- Re-energizing D41 causes 86 on Stator Cooling Water Pumps
During 40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK), what are the major mitigating actions for a loss of NKN-D42
- Locally trip A HD pump
- Use ADV’s if required
- LCO 3.0.3 until local control of Class PZR htrs
- CH pumps trip, LD isolates, CH suct. aligns to 514
- Perform Loss of HVAC
During 40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK), what are the major mitigating actions for a loss of NKN-D43
- Reduce Turbine load if needed
During 40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK), what are the effects of a Loss of NNN-D11
- Select Ch. X for PZR LT/PT
- Perform loss of LD AOP
- JSCALOR lost
During 40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK), what are the effects of a Loss of NNN-D12
- Select Ch Y for PZR LT/PT
- PTL CH pumps
- Manually realign CH suct back to VCT
- VCT auto m/u lost
- Use TFSP for power
- Loss of LD AOP
During 40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK), what are the Mitigating actions for a Loss of NNN-D15?
- Trip A MFP
- Prompt and prudent
During 40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK), what are the Mitigating actions for a Loss of NNN-D16?
- Trip B MFP
- Prompt and prudent
how does SBCS respond to power losses?
- NKN-D42 - SBCV’s SOV’s lose power, fail closed
- NNN-D11/12 - Loss of logic power, fail closed
- When restored SBCS comes back in Man with 0 output OR Emergency Off OR disconnected
How does DFWCS respond to power losses?
NNN-D11/12
- DFWCS and DCCV power auto transfer to other power supply
- NI Deviations switch to Canned values (5%<16.5%<60%)
How does RPCB respond to power losses?
NNN-D11 - RPCB disabled
NNN-D12 - Runback disabled, CEA drop and setback still function
How does RRS respond to power losses?
NNN-D11 - 1/2 of instruments fail, RRS still functional
NNN-D12 - RRS disabled
How does PLCS/PPCS Respond to a loss of NNN-D11
- Level master controller fails to 0
- Norm/STBY CH pump stop
- LT-100Y fails low
- PT-100Y fails low
- PZR htrs trip is selected to Y or BOTH
How does PLCS/PPCS Respond to a loss of NNN-D12
- Pressure Master Controller fails
- Spray controller fails
- Spray vlvs fail closed
- LT-100X fails low
- PT-100X fails low
- PZR Htrs trip is selected to X or BOTH
How does PLCS/PPCS Respond to a loss of NKN-D42
- PLCS/PPCS lose bistable functions
- PZR Low level htr cutout
- LCO 3.0.3 until local control of class B/U Htrs (RSP)
- 1/2 non-class B/U htrs lose control power
- Spray vlv position indication lost
How does CVCS respond to a loss of NNN-D11
- LD control vlvs fail closed
- Norm/STBY CH pumps stop
- VCT M/U flow controllers fail
- RCP Seal inj flow cont. vlvs 241, 242 fail open
- RDT Vent vlv fails closed
- RDT/HUT pumps trip and cannot start
How does CVCS respond to a loss of NNN-D12
- VCT LT-227 fails low, CH suct swaps to 514
- CR VCT level lost
- NCN-TC-223 closes
- CHB-523 closes (temp controller loss of power)
- LD Back press. vlvs fail closed
- CH line back press vlvs fail closed
- RCP Seal inj vlvs 243, 244 fail open
- RAMP/RMW pumps trip cannot start
How does CVCS respond to a loss of NKN-D42
- CH pump suct swap to 514 (LC227 aux circuit lost)
- 523 fails closed (63x relay)
- 210 X/Y fail closed (VCT M/U not available)
- ALL CH pumps stop (auto control ckt de-energized)
- RCP Seal inj. flow cont. vlvs fail open
- VPI lost for LD and Back press. control vlvs
How does Condensate and feed respond to a loss of NNN-D11
D11 - 1 mini flow
- B Cond pump mini flow fails open
How does Condensate and feed respond to a loss of NNN-D12
D12 - 2 mini flow
- A and C Cond. mini flow fail open
- Requires down power MFP suct. press
- Hotwell level control vlvs fail closed (LIC losses power)
- CDN-V195 Demin bypass fails open
How does Condensate and feed respond to a loss of NNN-D15
- MFP A Control vlvs fail closed
- Manually trip A MFP
How does Condensate and feed respond to a loss of NNN-D16
- MFP B control vlvs fail closed
- Manually trip MFP B
How does Condensate and feed respond to a loss of NKN-D41
- Hotwell level control vlvs fail closed (SOV’s)
How do the HDP’s respond to a loss of NKN-D41
- B HDP loses control power
- Both Recircs fail open
- A Disch fails closed
How do the HDP’s respond to a loss of NKN-D42
D42 go 2 A Brkr
- A pump loses control power
- A pump disch and recirc fail closed
- Go 2 A brkr and open locally
How do the HDP’s respond to a loss of NKN-D43
- B pump disch. fails closed
