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Systems Test 3 > LOT 201.14 PZR Pressure & Level > Flashcards

LOT 201.14 PZR Pressure & Level Flashcards

1
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

At what pressure will the PORV (PCV-655A) lift when COMS is armed?

A
  • 70 - 200 ˚F:*
  • *515 psig**
  • 220 - 380 ˚F:*
  • *730 psig**

Uses Auct Low WR TH / PT-403

  • Note:*
  • Normal PORV setpoint is ≈ 2335 psig. (Master pressure controller 87.5%)*
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2
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

How many RCPs are required for PZR Spray?

A
  • *RCP 1A ONLY**
  • *OR**
  • *RCP 1D ONLY**
  • *OR**
  • *RCPs 1B AND 1C**
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3
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

At what pressure will the PORV (PCV-656A) lift when COMS is armed?

A
  • 70 - 200 ˚F:*
  • *475 psig**
  • 220 - 380 ˚F:*
  • *660 psig**

Uses Auct Low WR TC / PT-404

  • Note:*
  • Normal PORV setpoint is 2335 psig. (B/U pressure channel)*
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4
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

What Tavg is used to calculate PZR program level?

A

Auctioneered High Tavg

Compares selected controlling channel level (LT-465 or LT-467) to program level to determine demand to FCV-0205.

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5
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

Which PZR level instruments are displayed on CP004?

A
  • Hot Calibrated:*
  • *LT-465 / LT-466 / LT-467**
  • LT-468 only in ICS / QDPS*
  • Cold Calibrated:*
  • *LT-675**
  • Calibrated to 140 ˚F*

Switch allows operator to select Cold Calibrated Level or Program Level.

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6
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

What controls the opening of the PZR Spray Valves? (PCV-655B / PCV-655C)

A
  • *Master Pressure Controller**
  • Driven off controlling channel*

  • Note:*
  • Only odd numbered channels can be selected as the “controlling channel” to input to the master pressure controller. (455/457)*
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7
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

Which PZR Pressure instrument does not tie into P-11?

A

PT-458

P-11: PZR Pressure ≥ 1985 psig [2/3]

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8
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

What is the basis for the size of the PZR?

A
  • Enough Water:*
  • *Keep Heaters covered during step load increase of 10%**
  • Enough Steam:*
  • *Accomodate 50% load reduction w/o reaching PZR LVL - High (92%)**
  • w/ Rods and Steam Dumps*
  • *After PZR LVL - High (92%) Rx trip, will not lift safety valves**
  • After Rx Trip AND Turbine Trip:*
  • *No SI**
  • *PZR will not empty**
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9
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

What is the effect of indicated PZR level for the following conditions?

  • Reference Leg Break
  • Diaphragm Failure
  • Reference Leg Heating
A
  • Reference Leg Break:*
  • *Less Mass → D/P ↓ → Lind↑**
  • Diaphragm Failure:*
  • *D/P ↓ → Lind↑**
  • Reference Leg Heating:*
  • *Less Mass → D/P ↓ → Lind↑**
  • w/o compensation*
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10
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

What is the bypass flow for the PZR spray valves?

A

2 gpm

Minimizes thermal shock when spray valve opens.

Note:
Each PZR spray valve provides 525 gpm

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11
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

What controls the opening of the PORVS? (PCV-655A / PCV-656A)

A
  • PCV-655A:*
  • *Master Pressure Controller**
  • 87.5% (≈ 2335 psig)*
  • PCV-656A:*
  • *Backup PZR Pressure Channel**
  • 2335 psig*
  • Note:*
  • Only odd numbered channels can be selected as the “controlling channel” to input to the master pressure controller. (455/457)
  • Only even numbered channels can be selected for backup control, and they only input to PCV-656A (456/458)
  • Switch on CP004
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12
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

At what pressure will the PZR PORV auto open signal blocked?

A

2185 psig

  • PCV-655A (PT-458)
  • PCV-656A (PT-457)

Tailpipe temperature for PORVs and Safeties on CP004. (PORV: TI-676 / Safeties: TI-677 - 679)

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13
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

What are the important PZR Master pressure controller setpoints?

A
  • PCV-655A:*
  • *87.5%: Opens**
  • *75%: Closes**
  • Spray Valves:*
  • *72%: Full Open**
  • *40.5%: Start to Open**
  • Control Heaters:*
  • *34.5%: Zero Power**
  • 22%: NOP*
  • *15.5%: Full Power**
  • B/U Heaters:*
  • *14.5%: Turn Off**
  • *9.5%: Turn On**
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14
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

How many PZR heaters are there and what is the KW rating / heater?

A

117 Heaters

  • *17.95 KW / Heater**
  • 2101 KW Total*

LCO 3.4.3 PZR

Applicable MODES 1-3

  • Requires 2 groups (A/B) w/ 175 KW each
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15
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

What PZR Level deviation will automatically turn on PZR B/U Heaters?

A
  • *+ 5% Level Deviation**
  • Controlling Channel Level (LT-465/467) > 5% above Program Level*

Done to preheat PZR insurge.

  • Note:*
  • Charging flow at +5% Level Deviation: 50 gpm
  • Charging flow at -5% Level Deviation: 300 gpm
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16
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

When is COMS required to be armed?

A

≤ 350 ˚F

  • PCV-655A (Auct Low WR TH / PT-403)
  • PCV-656A (Auct Low WR TC / PT-404)

COMS controller completely independent of master pressure controller.

  • Note:*
  • Manually armed on CP004*
17
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

What is the PZR Program Level for 0% RTP and 100% RTP?

A
  • 0% RTP (567 ˚F):*
  • *25%**
  • 100% RTP (593 ˚F):*
  • *57%**

At actual 100% RTP (592 ˚F) PZR Level will be 55.7%.

18
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

While operating in MODE 1, what is your PZR Pressure DNB limit?

A

2200 psig

LCO 3.2.5 DNB Parameters

Applicable: MODE 1

19
Q
  • LOT 201.14 PZR Pressure & Level*
    • *

At what PZR level will the heaters trip off?

A
  • *17% [1/2]**
  • LT-465/467 OR LT-466/467*

Backup heaters will turn back on if in auto once PZR LVL > 17%. [2/2]

  • Note:*
  • For LOOP / SI, B/U heaters control switch must be cycled to turn back on.*

Systems Test 3 (17 decks)

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