Section 3.6 CONTAINMENT

Question 1

What is T.S. 3.6.1 Containment?

Any 1 hour or less actions?

Answer 1

T.S. 3.6.1 Containment

Modes 1-4, Containment Shall be Operable

Containment inoperable, restore to operable within 1 hour.

Question 2

What is T.S. 3.6.2 Containment Air Locks?

Any 1 hour or less actions?

Answer 2

Modes 1-4, Two Containment Air Locks shall be Operable.

A: One or more containment air locks with one containment air lock door inoperable. Verify the operable door is closed within 1-hour.

B: One or more containment air locks with containment air lock interlock
mechanism inoperable. Verify an operable door is closed in the
affected air lock within 1-hour.

One or more containment air locks inoperable for reasons other than
Condition A or B. Initiate action to evaluate overall containment leakage
rate per LCO 3.6.1. immediately and within 1 hour verify a door in the affected air lock is closed.

Question 3

What is T.S. 3.6.3 Containment Isolation Valves?

Any 1 hour or less actions?

Answer 3

Modes 1-4, Each containment isolation valve shall be operable.

Penetration flow paths with two containment isolation valves and two inoperable isolation valves, isolate the affected flow path within 1-hour.

One or more purge exhaust or air room supply valves not locked closed, locked closed the affected valve within 1-hour.

Question 4

What is T.S. 3.6.4 Containment Pressure?

Any 1 hour or less actions?

Answer 4

Modes 1-4, Containment pressure shall be ≤ 1.0 psig in MODES 1 and 2 and ≤ 1.5 psig in MODES 3 and 4.

Containment pressure not within limits, restore containment to within limits in 1-hour.

Question 5

What is T.S. 3.6.5 Containment Air Temperature?

Any 1-hour or less actions?

Answer 5

Modes 1-4, Containment average air temperature shall be ≤ 140°F.

No 1-hour or less actions.

Question 6

What is T.S. 3.6.6 Containment Cooling?

Any 1-hour or less actions?

Answer 6

Modes 1-3, Two containment cooling trains shall be OPERABLE.

Less than 100% of the required post accident containment cooling capability available. Enter LCO 3.0.3 immediately.

Question 7

What is the minimum equipment that can be used to meet 100% containment cooling with MSIV bypass valves closed?

Answer 7

2 containment spray pumps and 2 spray headers OPERABLE

OR

1 containment spray pump
2 spray headers
3 safety related CACs, OPERABLE

(at least two service water pumps must be OPERABLE if CACs are to be relied upon).

Question 8

What minimum equipment is needed to meet 100% containment cooling with the MSIV bypass valves open?

Answer 8

2 containment spray pumps
2 spray headers,
2 safety related CACs, are OPERABLE (at least two service water pumps
must be OPERABLE if CACs are to be relied upon)

OR

1 containment spray pump
1 spray header
3 safety related CACs are OPERABLE (at least three service water pumps must be OPERABLE to provide the necessary service water flow to assure OPERABILITY of the CACs).

Question 9

Which SDC heat exchanger can have containment spray isolated and which can’t?

Answer 9

E-60A, SDC Heat Exchanger, has no isolation on the spray pump discharge line into the heat exchanger, E-60B, however, does.

Question 10

If spray pump discharge, (tube side), of E-60B is isolated, what is required for 100% containment cooling?

Answer 10

3 Safety related Containment Air Coolers
2 Containment Spray Pumps
2 spray headers
2 CCW pumps (P-52A and P-52B)
2 SWS pumps, and both CCW Heat Exchangers,

and if

1 CCW Containment Isolation Valve, CV-0910, CV-0911, or
CV-0940, is OPERABLE

and

2 CCW isolation valves for the non-safety related loads outside
the containment, CV-0944A and CV-0944 (or CV-0977B), are
OPERABLE.

Question 11

When do the CAC ‘A’ Fans get a start signal?

Answer 11

Only via the DBA sequencer. SIAS/CHP do not start them.