Mode 5 to Mode 3

Question 1

What is the Max Press/Temp Limit for CS during SDC Operations?

Answer 1

RCS Pressure shall be <250 PSIA and Temp <200F when CS is aligned to SDC (preclude pump damage)

Question 2

What are the temperature requirements and bases for initiating/securing SDC?

Answer 2

Initiation: Tcold <350F, <300F for LPSI seals, <180F for Max seal life long term, <135F when more than 4 days

Securing: During HU, stop SDC before >300F prevent thermal bind of LTOPs

Question 3

How do we increase purification flowrate thru the Letdown line?

Answer 3

1. Adjust PIC-201 LD BP Controller for desired flow
2. For Increase: Raise DP across system by throttline A/B train SDC valves

NOTE: LD Flow limited to 150 GPM (resin damage)

Question 4

How is SDC flow throttled, and how low can it go?

Answer 4

1. Close down on 1 Injection Valve 1st until fully closed, then close 2nd (minimize cavitation)
2. M5 - SDC Flow as low as 3780 GPM. M4 - >210F, Min Flow >4000 GPM
3. > 230F = SDC secured

Question 5

When is a Charging Pump Non-Functional during pulsation dampener adjustment operations?

Answer 5

When put in Pull to Lock

Question 6

What is Max RCS Temperature before O2 concentration must be within TRM Limits?

Answer 6

Prior to 250F (TLCO 3.4.101)

Question 7

What is the Vent flowpath of the PZR and RDT?

Answer 7

Steam Bubble: Thru RCA-HV-103 & RCB-HV-105 to RDT

RDT: To Waste Gas Surge Header or Refuel Purge (923)

Question 8

When a N2 bubble exists on the PZR, what is used to determine proper curve to use for Level?

Answer 8

PZR Temperature (not pressure)

Question 9

What must level be via LI-103 before energizing PZR Heaters?

Answer 9

25% or Greater

Question 10

What is the allowed actual max deviation between LI-110X/Y and LI-103?

Answer 10

<3%

Question 11

When must the use of PZR spray be logged in 40ST-9RC01, RCS PZR HU and CD Rates?

Answer 11

Main Spray: All cycles when <4 RCP’s running

Aux Spray: All cycles

Question 12

What are the requirements for RCP Seal Injection?

Answer 12

1. RCS Level >102’
2. RCS Temperature >195F & Pressure >215PSIA
3. Stop Seal engaged when secured. Sys Engineer.
4. No Seal Injection to ANY RCP if stop seal is on ANY RCP.

Question 13

Why are “Singe RCP Ops” Limits imposed?

Answer 13

To minimize pump wear due to runout

Question 14

What are the RCP Temperature Limits?

Answer 14

1. 2 RCP’s or less if Tc <200F
2. 3 RCP’s or less if Tc 200F to 500F
3. Heat Removal via SG’s limited at low RCS temps, HU Rates may be exceeded if 3 RCP’s operating
4. After 3rd RCP start, HU rates > 3.4.3, then stop 3rd RCP

Question 15

Why don’t we start RCP’s when SG Temperatures are greater than RCS Cold Leg Temperatures?

Answer 15

Prevent RCS Over-Pressure

Question 16

When can LTOP’s be isolated?

Answer 16

RCS Temperature >221F but <300F and after SDC has been secured.

Question 17

What are the SIAS Low PZR pressure setpoint requirements?

Answer 17

Cold Leg is >485F, the setpoint must be >140# greater than saturation pressure of Cold Leg

Ensures SIAS prior to RX Vessel upper head void formation in event steam line break

Question 18

What are the time limits for placing the Main Turbine turning gear in operation?

Answer 18

1. Bearing Oil Header temp 80-102F
2. Generator Seal Oil
3. CD Vacuum broken on loss of seal steam (seals)
4. > 4 hours before turbine startup (steam roll)

Question 19

How do we prevent core “lift” via RCP Operation?

Answer 19

3 or less operating when Temps are <500F