3.6 "Containment Systems"

Question 1

LCO 3.6.1 title

Answer 1

Containment

Question 2

LCO 3.6.1 requirement

Answer 2

Containment shall be operable

Question 3

LCO 3.6.1 applicability

Answer 3

Modes 1-4

Question 4

LCO 3.6.1 required actions < 1 hour

Answer 4

Containment inoperable, then restore containment to operable w/in 1 hour

Question 5

LCO 3.6.2 title

Answer 5

Containment Air Locks

Question 6

LCO 3.6.2 requirement

Answer 6

• 2 containment air locks shall be operable
• Entry and exit is permissible through a “locked” air lock door to perform repairs on the affected air lock components
• Separate Condition entry is allowed for each air lock
• Enter applicable conditions and required actions of LCO 3.6.1 “Containment” when leakage results in exceeding the overall containment leakage rate acceptance criteria

Question 7

LCO 3.6.2 applicability

Answer 7

Modes 1-4

Question 8

LCO 3.6.2 required actions < 1 hour

Answer 8

• 1 or more air locks with 1 air lock door inoperable, then verify the operable door is closed w/in 1 hour
• 1 or more air locks with interlock mechanism inoperable, then verify an operable door is closed in the affected air lock w/in 1 hour
• 1 or more air locks inoperable for reasons other than state above, then initiate action to evaluate overall containment leakage rate per LCO 3.6.1 immediately, AND verify a door is closed in the affected air lock w/in 1 hour

Question 9

LCO 3.6.3 title

Answer 9

Containment Isolation Valves

Question 10

LCO 3.6.3 requirement

Answer 10

• Each containment isolation valve shall be operable
• Penetration flow paths, except for 8” purge exhaust valves and 12” air room supply valves penetration flow paths, may be unisolated intermittently under admin controls
• Separate Condition entry is allowed for each penetration flow path
• Enter applicable conditions and required actions for system(s) made inoperable by containment isolation valves
• Enter applicable conditions and required actions of LCO 3.6.1 “Containment” when leakage results in exceeding the overall containment leakage rate acceptance criteria

Question 11

LCO 3.6.3 required actions < 1 hour

Answer 11

• For penetration flow paths with 2 containment isolation valves, if 1 or more penetration flow paths w/2 containment isolation valves inoperable (except for purge exhaust valve or air room supply valve not locked closed), then isolate the affected penetration flow path by use of at least 1 closed and de-activated automatic valve, closed manual valve, or blind flange w/in 1 hour
• 1 or more purge exhaust or air room supply valves not locked closed, then lock closed the affected valves w/in 1 hour

Question 12

LCO 3.6.4 title

Answer 12

Containment Pressure

Question 13

LCO 3.6.4 requirement

Answer 13

Containment pressure shall be <= 1.0 psig in Modes 1 and 2, and <= 1.5 psig in Modes 3 and 4

Question 14

LCO 3.6.4 applicability

Answer 14

Modes 1-4

Question 15

LCO 3.6.4 required actions < 1 hour

Answer 15

Containment pressure not w/in limits, then restore containment pressure to w/in limit w/in 1 hour

Question 16

LCO 3.6.5 title

Answer 16

Containment Air Temperature

Question 17

LCO 3.6.5 requirement

Answer 17

Containment average air temperature shall be <= 140 F

Question 18

LCO 3.6.5 applicability

Answer 18

Modes 1-4

Question 19

LCO 3.6.5 required actions < 1 hour

Answer 19

NONE

Question 20

LCO 3.6.6 title

Answer 20

Containment Cooling Systems

Question 21

LCO 3.6.6 requirement

Answer 21

2 containment cooling trains shall be operable

Question 22

LCO 3.6.6 applicability

Answer 22

Modes 1-3

Question 23

LCO 3.6.6 required actions < 1 hour

Answer 23

Less than 100% of the required post accident containment cooling capability available, then enter LCO 3.0.3 immediately