LOT 201.04 PZR, PRT, & RCDT Flashcards
- LOT 201.04 PZR, PRT, & RCDT*
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What drains directly into the RCDT?
- *RCP Seal #2 Leakoff**
- *CVCS Valve Stem Leakoffs**
- *Flange Leakoff**
- *Excess Letdown**
- Alternate Path*
- LOT 201.04 PZR, PRT, & RCDT*
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What is the setpoint of the PZR PORVs?
2335 psig
- PCV-655A: E1A11
- PCV-656A: E1B11
- Block valves are Class 1E 480V.
Both PZR PORVs AND Block valves required to be OPERABLE in MODES 1-3 (LCO 3.4.4)
- Note:*
- Relieves to PRT*
- LOT 201.04 PZR, PRT, & RCDT*
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When is COMS required?
< 350 ˚F
Lowers lift setpoint of PORVs. (BFPL)
- LOT 201.04 PZR, PRT, & RCDT*
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What cools the PRT?
- *RCDT HX**
- CCW*
Takes 8 hrs to cool from 200 ˚F → 120 ˚F.
- LOT 201.04 PZR, PRT, & RCDT*
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What is the basis for the size of the PZR and PRT?
- 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**
- LOT 201.04 PZR, PRT, & RCDT*
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Where does the RCDT relief valve relieve to?
Containment Normal Sump
- LOT 201.04 PZR, PRT, & RCDT*
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What drains into the PRT?
- *RHR Pump Discharge Relief (3)**
- *HHSI Pump Discharge Relief (3)**
- *LHSI Pump Discharge Relief (3)**
- *Safety Valves (3)**
- *PORVs (2)**
- *Seal #1 Return Relief (1)**
- *CVCS Letdown Relief (CV-3100)**
- *Head Vents**
- LOT 201.04 PZR, PRT, & RCDT*
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What is the setpoint the PZR Safety valves?
- *2485 psig ± 1%**
- 2% / - 3% (LCO 3.4.2.2)*
3 safety valves
Keeps RCS ≤ 2735 psig w/:
- Turbine Trip w/ NO Rx Trip
- PORVs do NOT operate
- Steam dumps do NOT operate
- Note:*
- Relieves to PRT*
- LOT 201.04 PZR, PRT, & RCDT*
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What indications and controls are on the ASP for the PZR, PRT, and RCDT system?
- *PZR Level**
- *B/U Heaters (A/B)**
- *PORVs / PORV Block Valves**
- Note:*
- Controls in MCR are located on CP004*
- LOT 201.04 PZR, PRT, & RCDT*
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When will the rupture discs on the PRT relieve pressure?
100 psig
Normally pressurized with 3 psig N2.
- LOT 201.04 PZR, PRT, & RCDT*
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What drains into the suction of the RCDT pump?
- *PRT**
- *Cavity Drain**
- *SI Accumulator Drains**
- *RCS Loop Drains**
- Note:*
- RCDT Pump will auto stop on Flow - Low 2*
- LOT 201.04 PZR, PRT, & RCDT*
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What is the maximum spray line ∆T allowed by the TRM?
621 ˚F
TRM 3.4.9.2 PZR Temperature Limits
Applicable: At all times
- Note:*
- By procedure limited to 320 ˚F*
- LOT 201.04 PZR, PRT, & RCDT*
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How many PZR heaters are there and what is the KW rating / heater?
117 Heaters
- *17.95 KW / Heater**
- 2100 KW Total*
LCO 3.4.3 PZR
Applicable MODES 1-3
- Requires 2 groups (A/B) w/ 175 KW each
- LOT 201.04 PZR, PRT, & RCDT*
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What is the maximum amount of water that can be in the PZR in MODES 1-3?
- *≤ 1816 ft3**
- ≈ 100% PZR LVL*
LCO 3.4.3 PZR
Applicable in MODES 1-3
- Note:*
- Total PZR volume is 2100 ft3*