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Public 2022 > 40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK) > Flashcards

40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK) Flashcards

1
Q

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

A
  • 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
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2
Q

During 40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK), what are the major effects for a loss of NKN-M46

A
  • RCP Control power lost
  • Loss of Emergency oil pumps
  • Loss of S/U XFMR protective relaying
  • Loss of control power to NAN-S06
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3
Q

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

A
  • 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
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4
Q

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

A
  • 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
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5
Q

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

A
  • Reduce Turbine load if needed
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6
Q

During 40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK), what are the effects of a Loss of NNN-D11

A
  • Select Ch. X for PZR LT/PT
  • Perform loss of LD AOP
  • JSCALOR lost
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7
Q

During 40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK), what are the effects of a Loss of NNN-D12

A
  • 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
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8
Q

During 40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK), what are the Mitigating actions for a Loss of NNN-D15?

A
  • Trip A MFP

- Prompt and prudent

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9
Q

During 40AO-9ZZ14 Loss of Non-Class Instrument or Control Power (NN/NK), what are the Mitigating actions for a Loss of NNN-D16?

A
  • Trip B MFP

- Prompt and prudent

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10
Q

how does SBCS respond to power losses?

A
  • 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
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11
Q

How does DFWCS respond to power losses?

A

NNN-D11/12

  • DFWCS and DCCV power auto transfer to other power supply
  • NI Deviations switch to Canned values (5%<16.5%<60%)
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12
Q

How does RPCB respond to power losses?

A

NNN-D11 - RPCB disabled

NNN-D12 - Runback disabled, CEA drop and setback still function

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13
Q

How does RRS respond to power losses?

A

NNN-D11 - 1/2 of instruments fail, RRS still functional

NNN-D12 - RRS disabled

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14
Q

How does PLCS/PPCS Respond to a loss of NNN-D11

A
  • 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
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15
Q

How does PLCS/PPCS Respond to a loss of NNN-D12

A
  • 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
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16
Q

How does PLCS/PPCS Respond to a loss of NKN-D42

A
  • 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
17
Q

How does CVCS respond to a loss of NNN-D11

A
  • 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
18
Q

How does CVCS respond to a loss of NNN-D12

A
  • 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
19
Q

How does CVCS respond to a loss of NKN-D42

A
  • 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
20
Q

How does Condensate and feed respond to a loss of NNN-D11

A

D11 - 1 mini flow

- B Cond pump mini flow fails open

21
Q

How does Condensate and feed respond to a loss of NNN-D12

A

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
22
Q

How does Condensate and feed respond to a loss of NNN-D15

A
  • MFP A Control vlvs fail closed

- Manually trip A MFP

23
Q

How does Condensate and feed respond to a loss of NNN-D16

A
  • MFP B control vlvs fail closed

- Manually trip MFP B

24
Q

How does Condensate and feed respond to a loss of NKN-D41

A
  • Hotwell level control vlvs fail closed (SOV’s)
25
Q

How do the HDP’s respond to a loss of NKN-D41

A
  • B HDP loses control power
  • Both Recircs fail open
  • A Disch fails closed
26
Q

How do the HDP’s respond to a loss of NKN-D42

A

D42 go 2 A Brkr

  • A pump loses control power
  • A pump disch and recirc fail closed
  • Go 2 A brkr and open locally
27
Q

How do the HDP’s respond to a loss of NKN-D43

A
  • B pump disch. fails closed

Public 2022 (46 decks)

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