ADS

Question 1

What provides power to the

ADS/SRV Solenoids?

Answer 1

Div 1 DC - A ADS and C Solenoids

Div 2 DC - B ADS Solenoids

Question 2

What provides the N2 for the ADS Solenoids?

Answer 2

They have 7 dedicated 10 cubic foot accumulator tanks that are supplied by tanks 4 and 5 which are supplied from the high pressure N2 system.

Question 3

What provides the N2 for the C Solenoids?

Answer 3

They are each provided from a 2 cubic foot accumulator tank that is supplied by GSN-TK2 via low pressure nitrogen from the liquid N2 tanks

Question 4

What is required to automatically open the ADS valves?

Answer 4

L1 signal
L3 confirmatory signal
ECCS Pump Running (CSL-145#, RHR-125#)
105 second timer

Question 5

What is required to open the ADS Valves with the manual push buttons?

Answer 5

A low pressure ECCS Pump must be running

Question 6

All conditions are met for the ADS Valves to open.

After the ADS valves go open you depress the reset push button. What happens?

Answer 6

The ADS valves will close and reopen after the 105 second timer is done.

Question 7

All conditions are met for the ADS Valves to open.

After the ADS valves go open you inhibit ADS with the keylock switch. What happens?

Answer 7

Nothing, the ADS valves have a seal in, you must depress the reset push button to close the valves, after which the valves remain closed.

Question 8

You do not have any ECCS pumps available to run, how would you open the ADS Valves?

Answer 8

Use the Keylocks in the back on P628/631 to open the valves.

Question 9

you have a stuck open SRV(Non ADS) and are required to blowdown, what do you do?

Answer 9

Using the keylocks on the P628/631, open the SAME 6 ADS valves on each panel.

Question 10

At what N2 pressure is it possible that the SRV may open without an open signal?

Answer 10

SRVs may lift if N2 pressure is above 200#

Question 11

You are manually controlling pressure with SRVs. What caution exists when performing this action?

Answer 11

Should cycle SRVs in a sequence that evenly distributes heat in the Suppression Pool

Question 12

A rupture in the N2 line supplying the C solenoids cause low pressure nitrogen pressure in GSN-TK2 to drop to 75psig. What action is required?

Answer 12

IAW ARP 851210, a manual SCRAM is required if GSN-TK2 pressure is less than or equal to 79 psig

Question 13

1 SRV is equivalent to how many bypass valves?

Answer 13

Approx 1 Bypass Valve

Question 14

1 SRV is equivalent to what percent power steam flow?

Answer 14

Approx 5% power

Question 15

What are the relief valve setpoints?

Answer 15

2 @ 1103
4 @ 1113
4 @ 1123
4 @ 1133
4 @ 1143

Question 16

What are the Safety valve setpoints?

Answer 16

2 @ 1165
4 @ 1175
4 @ 1185
4 @ 1195
4 @ 1205

Question 17

What is the motive force to open a relief valve?

Answer 17

N2 opens a SRV in Relief Mode

Question 18

What is the motive force to open a safety valve?

Answer 18

RPV Pressure opens a SRV in Safety Mode

Question 19

What provides position indication on P601, P628/631

Answer 19

P601 - acoustic monitors

P628/631 - Solenoid energized