DC

Question 1

Loss of S016

Answer 1

• Main Generator PCB’s fail to open (4 mins to manually open)
• Station Service 4160VAC loads DO NOT auto transfer (NO CONTROL POWER)
• RCIC not available
• Rx Scrams and Recirc Pumps Trip (>27.6% RTP)
• RFP’s can not be tripped from MCR

Question 2

Loss of S017

Answer 2

• Control power is lost to BOTH ASD bkrs (neither pump can be tripped from the MCR, shutdown button still functions)
• HPCI is not available and all indication for DC power loads are lost
• No fast transfer of 4160 VAC E/F/G
• C32-R606C – “C” GEMAC RWL Indicator lost
• C32-R605C – “C” GEMAC Pressure Indicator lost
• C32-R603C – “C” Steam Flow Indicator lost
• C32-R604C – “B” Feed Flow Indicator lost
• Lose ECCS cabinets P926 & P928

Question 3

Loss of S001

Answer 3

• RCIC not available
• Rx Instruments similar to R22-S016
• Loss of control power to 4160 ‘A’ and ‘B’ supply breakers
• Loss of control power to 600 ‘C’
• Loss of RFPT A Control Power. RFPT 2A will not trip manually or automatically due to loss of power to its trip circuit.
- SS Bus Fast Tx lost

Question 4

Loss of S002

Answer 4

• HPCI not available
• Rx Instruments similar to R22-S017
• Loss of control power to 4160 ‘A’, ‘B’, ‘C’, and ‘D’ feeder breakers
• Loss of control power to 600 ‘D’
• Have to use ASD stop push buttons. Cant use switch in MCR
• Trip logic for B31-F031 (recirc pump discharge valve)

Question 5

Loss of S003

Answer 5

• Control power is lost to the Exciter Field Breaker, however, the breaker remains closed
• Loss of control power to 4160 ‘C’ and ‘D’ supply breakers
• Loss of control power to 600 ‘A’, ‘B’, ‘AA’, and ‘BB’
• Loss of RFPT B Control Power
• RFPT & Main Turbine Trip Relays
• Loss of Fast Transfer Logic for 4160VAC A/B/C/D
• Lose generator runbacks

Question 6

Loss of S004

Answer 6

• ‘A’ EDG will not auto or manual start
• ‘A’ EDG output breaker will not tie
• ARI will not initiate (S005 on U1)
• RHR ‘A’ and ‘D’ cannot be started from the MCR
• CS ‘A’ will not auto start
• Loss of control power to 4160 ‘E’
• Loss of control power to RHRSW C, PSW C, RHR D, CRD A

Question 7

Loss of S005

Answer 7

Loss of U1 ARI

1B EDG Start Logic and Brkr control

Question 8

Loss of S006

Answer 8

• ‘C’ EDG will not auto to manual start
• ‘C’ EDG output breaker will not tie
• RHR ‘B’ and ‘C’ will not auto start
• RHRSW ‘B’ and ‘D’ cannot be started from the MCR
• CS ‘B’ will not auto start
• Loss of control power to 4160 ‘G’
• Loss of control power to PSW D, RHR C, CRD B

Question 9

Purpose

Answer 9

Prove uninterruptible power to key components

Question 10

Battery Limits

Answer 10

125/250 - 3 sets for 2-4hrs
24/48 - 3 sets for 8hrs
Vital AC - 2hrs

Question 11

Float Charge

Answer 11

Battery Charger voltage output = battery voltage

Question 12

Equalize Charge

Answer 12

Battery Charger voltage output slightly > battery voltage

Question 13

Indication of a ground

Answer 13

Requires a minimum of 19,000 ohms