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Systems Test 4 > LOT 202.44 QDPS > Flashcards

LOT 202.44 QDPS Flashcards

1
Q
  • LOT 202.44 QDPS*
    • *

What is the core exit thermocouple?

A

5th hottest CET

Used for critical safety functions

  • Note:*
  • NOT shown on qual PAMS.
  • NOT used for calculating subcooling (Max Quad T/C Avg)
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2
Q
  • LOT 202.44 QDPS*
    • *

What will happen to the Thot Average indications if power is lost to APC-1 or APC-2?

A
  • APC-1:*
  • *Display Data Lost**
  • APC-2:*
  • *Fails in erratic manor**

Once APC-2 is reset, Thot will fail low. (Automatic protective actions will occur)

  • Note:*
  • Loop 1 is Train “A”,* Loop 2 is Train “D”, Loop 3 is Train “B”, Loop 4 is Train “C.”
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3
Q
  • LOT 202.44 QDPS*
    • *

What will happen to the SG PORVs if power is lost to APC-1 or APC-2?

A
  • APC-1:*
  • *Data will not be available on DPUs**
  • APC-2:*
  • *Fails closed**
  • When power returns, valve shifts to manual w/ a setpoint of 1225 psig*
  • Can operate SG PORVs locally when APC-2 lost by manipulating 2 valves on actuator assembly.
  • Controlled from upper section of APC-2.
  • Note:*
  • If power to ESF MCC’s are lost, place associated SG PORVs in manual, close the SG PORVs, and dispatch operator to place station blackout power bypass sw. to bypass.
  • This returns control back to MCR.
  • Train “A” MCCs power SG PORV hydraulic pumps A and D.
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4
Q
  • LOT 202.44 QDPS*
    • *

Where are the QDPS cabinets physically located?

A
  • Train “A”:*
  • *Train “A” Sequencer (EAB 10’)**
  • APC-A1, APC-A2, DPU A*
  • Train “B”:*
  • *Train “B” Sequencer (EAB 10’)**
  • APC-B1, APC-B2*
  • Train “C”:*
  • *Train “C” Sequencer (EAB 10’)**
  • APC-C1, APC-C2, DPU C*
  • Train “D”:*
  • *ASP Room (EAB 10’)**
  • APC-D1, APC-D2*
  • RPU-N:*
  • *Relay Room (EAB 35’)**
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5
Q
  • LOT 202.44 QDPS*
    • *

What will happen to the Rx Head Vents if power is lost to APC-2?

A

Will close if opened

Controlled from upper section of APC-2.

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6
Q
  • LOT 202.44 QDPS*
    • *

Where are the demultiplexers physically located?

A
  • MCR:*
  • *Behind CP002**
  • *Behind CP018**
  • Recorder*
  • ASP:*
  • *Behind ASP**

Powered from DP005

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7
Q
  • LOT 202.44 QDPS*
    • *

What will happen to the AFW control valves if power is lost to APC-1 or APC-2?

A
  • APC-1:*
  • *DPU Data is lost**
  • APC-2:*
  • *Flow Control Valves fail As-Is**
  • *Flow indicators will read 0 gpm**
  • On CP006 and QDPS*
  • Can still be controlled in manual if APC-2 lost.
  • Controlled from upper section of APC-2.
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8
Q
  • LOT 202.44 QDPS*
    • *

How does the lower section of the APC-2 cabinets provide a Thot average signal?

A

Each APC-2 averages Thot in its respective loop

Each loop uses 3 RTDs (120˚ apart)

Uses Power Correction fraction to minimize streaming effects

  • If 1 RTD lost, results in POOR signal but all 3 RTDs still used
  • Must dispatch I&C to force RTD to BAD status so only 2 RTDs used in calculation
  • Note:*
  • Failure of 2 RTDs in 1 loop results in alarm on CP005.*
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9
Q
  • LOT 202.44 QDPS*
    • *

What powers the various components in QDPS?

A
  • APC-1s and APC-2s:*
  • *DP1201 - DP1204**
  • DPUs:*
  • *DP001/DP002**
  • Plasma Displays:*
  • *DP001/DP002**
  • Demultipliers:*
  • *DP005**
  • CP002/CP018/ASP*
  • RPU-N:*
  • *DP006**
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10
Q
  • LOT 202.44 QDPS*
    • *

What will happen to the SGNR Level compensation if power is lost to APC-1 or APC-2?

A
  • APC-1:*
  • *Display information Lost**

APC-2:
Fails in erratic manor
Backfed through 7300 cabinets
Results in erroneous indications

Controlled by bottom section of APC-2.

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11
Q
  • LOT 202.44 QDPS*
    • *

How does the AFW control valves respond during a AFW actuation?

A
  • APC-2:*
  • *Flow Controlled between 550 gpm - 640 gpm**
  • Does not look at SGWL just AFW flow*
  • Manual:*
  • *Operator can manually jog valve as long as APC-2 not actively adjusting flow.**

APC-2 will return flow to band once sw. released.

If switched held by operator until full open reached, APC-2 will retake control and return flow to band.

  • Note:*
  • Resetting AFW isolation allows operator to go < 550 gpm but APC-2 will return flow to ≤ 605 gpm (640 gpm - 35 gpm B/D) once operator releases sw. or full open reached.*
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12
Q
  • LOT 202.44 QDPS*
    • *

Class 1E systems are those electrical and electronic systems and components that are essential for what?

A

Emergency Rx S/D

Rx Core Cooling

Containment Isolation

Containment Heat Removal

Prevent release to environment

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13
Q
  • LOT 202.44 QDPS*
    • *

How does the lower section of the APC-2 cabinets provide a compensated SGNR level signal?

A
  • *Each APC-2 cabinet (4) provides a D/P level transmitter and 2 strap-on RTDs per SG**
  • Highest RTD used for compensaton*

SGNR Level sent to 7300 cabinets and DPUs

  • If 1 RTD outside band (50 ˚F - 420 ˚F), other RTD used
  • If both outside band, uncompensated level sent
    • Results in alarm on CP006
  • Note:*
  • A loss of a single APC-2 cabinet will result in [1/4 on 4/4] and will not trip the Rx. [2/4 on 1/4]*
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14
Q
  • LOT 202.44 QDPS*
    • *

The upper section of the APC-2 cabinets provide valve control for which valves?

A
  • *SG PORVs**
  • Manual AND Automatic*
  • *AFW throttle valves**
  • Automatic ONLY*
  • *Rx head vent valves**
  • Manual ONLY*

SG PORVs controlled from MCR AND ASP.

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15
Q
  • LOT 202.44 QDPS*
    • *

What is used to calculate the QDPS RCS Subcooling value?

A

RCS Saturation Temp - Max Quad Thermocouple Avg

DPU does RCS Subcooling and RVWL.

  • Note:*
  • Uses average of the 3 RCS wide range pressures to calculate RCS Saturation temp.*
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16
Q
  • LOT 202.44 QDPS*
    • *

What are the APC-1s passive outputs?

A
  • Train A:*
  • *PZR Level**

RHR Pump “A” Discharge Pressure / Flow

Low Head “A” to Cold Leg “A” Temp

Charging Discharge Flow

  • Train B:*
  • *PZR Level**

RHR Pump “B” Discharge Pressure / Flow

Low Head “B” to Cold Leg “B” Temp

Loop A/B/C/D Wide Range Cold Leg Temps

  • Train C:*
  • *PZR Level**

RHR Pump “C” Discharge Pressure / Flow

Low Head “C” to Cold Leg “C” Temp

RCPs A/B/C/D Seal Injection Flow

  • Train D:*
  • *PZR Level**

Loop A/B/C/D Wide Range Hot Leg Temps

  • Note:*
  • Since these are passive signals, on a loss of power to respective APC-1, these signals will fail erratically.*

Systems Test 4 (14 decks)

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