3.5 Emergency Core Cooling Systems

Question 1

3.5.1 Accumulators

Answer 1

Four ECCS accumulators shall be Operable

Modes 1 and 2
Mode 3 with RCS Prs >1000psig

D. 2 or more accumulators inoperable
D.1 Enter LCO 3.0.3 - Immediately

Question 2

3.5.2 - ECCS - Operating

Answer 2

Two ECCS trains shall be Operable

Modes 1, 2, and 3

C. Less than 100% of the ECCS flow equivalent to a single Operable ECCS train available
C.1 Enter LCO 3.0.3 - Immediately

Question 3

3.5.3 ECCS - Shutdown

Answer 3

One ECCS train shall be Operable

Mode 4

A. Required ECCS RHR system inoperable
A.1 Initiate action to restore required RHR subsystem to Operable Status - Immediately

B. Required ECCS CCP inoperable
B.1 Restore CCP to operable status - 1 hr

Question 4

3.5.4 Refueling Water Storage Tank

Answer 4

The RWST shall be Operable

Modes 1, 2, 3, and 4

B. RWST inoperable for reasons other than Cond A
B.1 Restore RWST to Operable status - 1 hr

Question 5

3.5.5 Seal Injection Flow

Answer 5

RCP seal injection flow resistance shall be >/= 0.227 ft/gpm^2

Modes 1, 2, and 3