LOT 201.04 PZR, PRT, & RCDT

Question 1

• LOT 201.04 PZR, PRT, & RCDT*
• • *

What drains directly into the RCDT?

Answer 1

• *RCP Seal #2 Leakoff**
• *CVCS Valve Stem Leakoffs**
• *Flange Leakoff**
• *Excess Letdown**
• Alternate Path*

Question 2

• LOT 201.04 PZR, PRT, & RCDT*
• • *

What is the setpoint of the PZR PORVs?

Answer 2

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*

Question 3

• LOT 201.04 PZR, PRT, & RCDT*
• • *

When is COMS required?

Answer 3

< 350 ˚F

Lowers lift setpoint of PORVs. (BFPL)

Question 4

• LOT 201.04 PZR, PRT, & RCDT*
• • *

What cools the PRT?

Answer 4

• *RCDT HX**
• CCW*

Takes 8 hrs to cool from 200 ˚F → 120 ˚F.

Question 5

• LOT 201.04 PZR, PRT, & RCDT*
• • *

What is the basis for the size of the PZR and PRT?

Answer 5

• 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**

Question 6

• LOT 201.04 PZR, PRT, & RCDT*
• • *

Where does the RCDT relief valve relieve to?

Answer 6

Containment Normal Sump

Question 7

• LOT 201.04 PZR, PRT, & RCDT*
• • *

What drains into the PRT?

Answer 7

• *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**

Question 8

• LOT 201.04 PZR, PRT, & RCDT*
• • *

What is the setpoint the PZR Safety valves?

Answer 8

• *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*

Question 9

• LOT 201.04 PZR, PRT, & RCDT*
• • *

What indications and controls are on the ASP for the PZR, PRT, and RCDT system?

Answer 9

• *PZR Level**
• *B/U Heaters (A/B)**
• *PORVs / PORV Block Valves**

• Note:*
• Controls in MCR are located on CP004*

Question 10

• LOT 201.04 PZR, PRT, & RCDT*
• • *

When will the rupture discs on the PRT relieve pressure?

Answer 10

100 psig

Normally pressurized with 3 psig N₂.

Question 11

• LOT 201.04 PZR, PRT, & RCDT*
• • *

What drains into the suction of the RCDT pump?

Answer 11

• *PRT**
• *Cavity Drain**
• *SI Accumulator Drains**
• *RCS Loop Drains**

• Note:*
• RCDT Pump will auto stop on Flow - Low 2*

Question 12

• LOT 201.04 PZR, PRT, & RCDT*
• • *

What is the maximum spray line ∆T allowed by the TRM?

Answer 12

621 ˚F

TRM 3.4.9.2 PZR Temperature Limits

Applicable: At all times

• Note:*
• By procedure limited to 320 ˚F*

Question 13

• LOT 201.04 PZR, PRT, & RCDT*
• • *

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

Answer 13

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

Question 14

• LOT 201.04 PZR, PRT, & RCDT*
• • *

What is the maximum amount of water that can be in the PZR in MODES 1-3?

Answer 14

• *≤ 1816 ft³**
• ^{≈ 100% PZR LVL}*

LCO 3.4.3 PZR

Applicable in MODES 1-3

• Note:*
• Total PZR volume is 2100 ft³*