3.5 "Emergency Core Cooling System"

Question 1

LCO 3.5.1 title

Answer 1

Safety Injection Tanks

Question 2

LCO 3.5.1 requirement

Answer 2

4 SITs shall be operable

Question 3

LCO 3.5.1 applicability

Answer 3

Modes 1 and 2

Question 4

LCO 3.5.1 required actions < 1 hour

Answer 4

2 or more SITs inoperable, then enter LCO 3.0.3 immediately

Question 5

LCO 3.5.2 title

Answer 5

ECCS - Operating

Question 6

LCO 3.5.2 requirement

Answer 6

2 ECCS trains shall be operable

Question 7

LCO 3.5.2 applicability

Answer 7

• Modes 1 and 2

- Mode 3 with PCS temperature >= 325 F

Question 8

LCO 3.5.2 required actions < 1 hour

Answer 8

Less than 100% of the required ECCS flow available, then enter LCO 3.0.3 immediately

Question 9

LCO 3.5.3 title

Answer 9

ECCS - Shutdown

Question 10

LCO 3.5.3 requirement

Answer 10

• 1 LPSI train shall be operable
• A LPSI train may be considered operable during alignment and operation for SDC if capable of being manually realigned to the ECCS mode of operation

Question 11

LCO 3.5.3 applicability

Answer 11

• Mode 3 with PCS temperature < 325 F

- Mode 4

Question 12

LCO 3.5.3 required actions < 1 hour

Answer 12

Required LPSI train inoperable, then initiate action to restore one LPSI train to operable immediately

Question 13

LCO 3.5.4 title

Answer 13

SIRWT

Question 14

LCO 3.5.4 requirement

Answer 14

The SIRWT shall be operable

Question 15

LCO 3.5.4 applicability

Answer 15

Modes 1-4

Question 16

LCO 3.5.4 required actions < 1 hour

Answer 16

SIRWT inoperable for reasons other than boron concentration or temperature not w/in limits, then restore SIRWT to operable w/in 1 hour

Question 17

LCO 3.5.5 title

Answer 17

Containment Sump Buffering Agent and Weight Requirements

Question 18

LCO 3.5.5 requirement

Answer 18

Buffer baskets shall contain >= 8186 lbs and <= 10,553 lbs of Sodium Tetraborate Decahdrate

Question 19

LCO 3.5.5 applicability

Answer 19

Modes 1-3

Question 20

LCO 3.5.5 required actions < 1 hour

Answer 20

NONE