Section 3.2 Power Distribution Limits Flashcards

1
Q
  • LCO 3.2.3 Nuclear Enthalpy Rise Hot Channel Factor*
    • *

When is LCO 3.2.3 Nuclear Enthalpy Rise Hot Channel Factor Applicable?

A

MODE 1

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2
Q
  • LCO 3.2.1 AFD*
    • *

When ≥ 90% RTP, what are your ≤ 1 hour action(s) if AFD is outside the target band?

A
  • LCO 3.2.1 AFD*
  • Action A.1*
    • *
  • Restore AFD to target band [15 min]

OR

  • Reduce RTP to < 90% RTP [15 min]
    • *

Target band is +5 / -10

Note:
Considered outside target band if ≥ 2 excore instruments indicating outside band.

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3
Q
  • LCO 3.2.1 AFD*
    • *

When is LCO 3.2.1 AFD Applicable?

A

MODE 1, > 15 RTP

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4
Q
  • LCO 3.2.4 QPTR*
    • *

When is LCO 3.2.4 QPTR Applicable?

A

MODE 1 > 50% RTP

Max Upper ExcoreAverage Upper Excore

OR

Max Lower ExcoreAverage Lower Excore

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5
Q
  • LCO 3.2.1 AFD*
    • *

When < 90% RTP but ≥ 50% RTP, what are your ≤ 1 hour action(s) if AFD is outside the target band?

A
  • LCO 3.2.1 AFD*
  • Action A.2*
    • *

Power operation may continue if:

  • Been outside target band ≤ 1 hr during last 24 hrs (Cumulative) [1 : 1 ratio]
  • AFD in acceptable region in COLR

Otherwise:

  • Reduce RTP < 50% RTP [30 min]
  • Reduce Power Range Flux High Trip ≤ 55% RTP [4 hrs]

​> 15% RTP but < 50% RTP with AFD outside the target band cumulates time in a 2 min : 1 min penalty ratio.

Note:
Considered outside target band if ≥ 2 excore instruments indicating outside band.

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6
Q
  • LCO 3.2.4 QPTR*
    • *

What is the definition of QPTR?

A

The ratio of the maximum upper excore detector calibrated output to the average of the upper excore detector calibrated outputs
OR
The ratio of the maximum lower excore detector calibrated output to the average of the lower excore detector calibrated outputs

Whichever is Greater.

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7
Q
  • LCO 3.2.5 DNB Parameters*
    • *

When is LCO 3.2.5 DNB Parameters Applicable?

A

MODE 1

  • Tavg ≤ 595 ˚F
  • PZR Pressure > 2200 psig
  • Thermal Design Flow ≥ 392,000 gpm
  • Thermal Design Flow (COLR) > 403,000 gpm
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8
Q
  • LCO 3.2.2 Heat Flux Hot Channel Factor FQ(Z)*
    • *

What are your ≤ 1 hour action(s) if FQ(Z) is exceeding its limit?

A
  • LCO 3.2.2 Heat Flux Hot Channel Factor FQ(Z)*
  • Action A*
    • *

Reduce RTP 1% for each 1% FQ(Z) exceeds the limit [15 min]

May Continue power operation for 72 hrs if:

  • Lower OT∆T Rx trip 1% for each 1% FQ(Z) exceeds the limit
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9
Q
  • LCO 3.2.2 Heat Flux Hot Channel Factor FQ(Z)*
    • *

When is LCO 3.2.2 Heat Flux Hot Channel Factor FQ(Z) Applicable?

A

MODE 1

Peak kW/ftAverage kW/ft

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10
Q
  • LCO 3.2 Bases*
    • *

What is the power distribution limits bases?

A

Provides assurance for fuel integrity following Condition I and II events

Maintains DNBR ≥ 1.17

Limits Fission Gas Release

Limits Fuel Pellet Temperature

Limits cladding mechanical properties

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