40EP-9EO02 Reactor Trip

Question 1

What is the purpose of 40EP-9EO02 Reactor Trip?

Answer 1

• Actions for UNCOMPLICATED RX TRIP
• Stabilize in Mode 3
• Minimize release
• Transition to appropriate procedure ASAP

Question 2

What are the Entry conditions for 40EP-9EO02 Reactor Trip?

Answer 2

• SPTA’s complete
• uncomplicated trip (SPTA SFSC’s met)
• ESD occurred AND MSIS isolated and Tc recovering in SPTA’s

Question 3

What are the Exit conditions for 40EP-9EO02 Reactor Trip?

Answer 3

• uncomplicated reactor trip is NOT confirmed
• Reactor Trip SFSC acceptance criteria NOT satisfied
• Procedure is complete:
  
  • ALL SFSC’s met
  • stable in Mode 3

Question 4

For 40EP-9EO02 Reactor Trip, what is the Rx control SFSC?

Answer 4

• <2x10-4% stable or lowering
• All FSCEA’s inserted
• > 40gpm boration
• SDM verified

Question 5

Following a Rx Trip, when is the MAX subcritical multiplication level expected?

Answer 5

15 minutes post trip

Question 6

For 40EP-9EO02 Reactor Trip, what is the Maintenance of Vital Auxiliaries SFSC?

Answer 6

• At least 1 PB
• 1 NA & NB
• At least 1 on same train as PB:
  
  • PKA, PKC, & PNA
  • PKB, PKD, & PNB

Question 7

For 40EP-9EO02 Reactor Trip, How is the MVA SFSC different than other ORP’s?

Answer 7

• Only ORP that required a non-vital bus

Question 8

For 40EP-9EO02 Reactor Trip, what is the RCS Inventory SFSC?

Answer 8

• Lpzr 10-65% trending 33-53%
• ≥24°F RCS Subcooling
• RVLMS 100% RVUH

Question 9

For 40EP-9EO02 Reactor Trip, what is the RCS Press Control SFSC?

Answer 9

• Ppzr 1837-2285 trending 2225-2275 psia

Question 10

For 40EP-9EO02 Reactor Trip, what is the Core Heat Removal SFSC?

Answer 10

• RCS ▲T <10°F

- ≥24°F subcooling

Question 11

For 40EP-9EO02 Reactor Trip, what is the RCS Heat Removal SFSC?

Answer 11

• Tc 560-570°F

- At least 1 SG 45-60% NR with feed OR FW restoring to 45-60% NR

Question 12

For 40EP-9EO02 Reactor Trip, what is the Containment Isolation SFSC?

Answer 12

• <2.5 psig

- no CNTMT or secondary RU alarms/ unexpected rise in activity

Question 13

For 40EP-9EO02 Reactor Trip, what is the CNTMT Temp Press Control SFSC?

Answer 13

• <117°F

- <2.5 psig

Question 14

For 40EP-9EO02 Reactor Trip, what is the basis for the Lpzr upper and lower limits in SFSC?

Answer 14

• 10% Measurable level in PZR

- 65% avoids going solid & steam space for pressure control (spray)

Question 15

For 40EP-9EO02 Reactor Trip, what is the basis for the Lsg upper and lower limits in SFSC?

Answer 15

• 45%NR - Ensures tubes are covered

- 60%NR - Ensures margin to MSIS, room for swell

Question 16

For 40EP-9EO02 Reactor Trip, what actions are Unique to Unit 1 during a SIAS signal and why?

Answer 16

• Restore WRF breaker if possible

- Cooling tower m/u lost resulting in higher silica in CW plating out on condenser tubes

Question 17

At what power level and how long do you have to perform BDAS check following a trip?

Answer 17

• ≤2x10-6%

- Within 1 hour