FP Gaseous

Question 1

What 3 systems/areas does Halon support for suppression?

Answer 1

AEER, Records Management, Main Computer Room

Question 2

What are the two AEER Halon Systems and how many bottles are associated with each?

Answer 2

Initial Discharge - 9 bottles; Extended Discharge - 5 bottles.

Question 3

Where are the AEER Halon Bottles Located?

Answer 3

U2 Trackway

Question 4

How does the AEER Halon System Actuate?

Answer 4

Automatic - 2 smoke detectors
Manual Electronic - initiation button (must be held)
Manual Mechanical at bottles

Question 5

How do the manual initiation and abort switches function?

Answer 5

Two of each, must remove pin and hold switch in place. Pins can be inserted to hold. The switches are spring returns.

Question 6

How do the cylinders/bottles initiate (what opens them)?

Answer 6

4 pilot valves - 2 on initial, 2 on extended.

Question 7

AEER Halon - What happens if you release the abort switch

Answer 7

If the abort switch is used, if released it does not reset timer. It starts a 10 second timer to release the Halon.
Operation of abort switch causes a trouble alarm.

Question 8

How do you reset any Halon initiation?

Answer 8

Resetting the XL-3 fire computer - locally or in MCR

Question 9

How do you disable the AEER Halon System?

Answer 9

AEER Halon Solenoid Keylock Switch - located on north wall outside AEER - used during OOS or surveillances

Question 10

How does Halon System Auto Activate?

Answer 10

Signal from AT LEAST 2 smoke detectors

Question 11

How can you manually initiate Halon injection upon loss of control power?

Answer 11

Mechanically via lever at initials and valve at extendeds - each bank pilot bottles.

Question 12

What interlock exists to contain Halon discharge in AEER?

Answer 12

Upon injection, ventilation dampers close

IF CONTROL SWITCHES ARE NOT IN PURGE

Question 13

For the Computer Room and Records Halon System: How many bottles are there?

Answer 13

2 each - 1 for initial, 1 for extended discharge.

Question 14

What is the delay for each Halon System?

Answer 14

60 seconds

Question 15

For the Computer Room and Records Halon System: Alternate initiation?

Answer 15

Manual Pull Station or Mechanical Pins on bottles.

Question 16

What must be done to deactivate an initiated Halon discharge signal?

Answer 16

Hold the abort signal button until the system can be reset.

Question 17

What happens to the halon system upon loss of 125vdc?

Answer 17

Nothing.

Question 18

What powers the Halon injection valves?

Answer 18

24VDC from XL3

Question 19

HALON TRM - How many initial and extended discharge cylinders are required to be operable for the AEER?

Answer 19

8 initial and 5 extended

Question 20

HALON TRM - For the Main Computere Room - How many halon cylinders must be operable?

Answer 20

Both.

Question 21

HALON TRM - When is the HALON TRM Applicable?

Answer 21

Whenever the projected equipment is required to be operable.

Question 22

HALON TRM - What actions are required if a Halon Subsystem is inoperable?

Answer 22

AEER - Dedicated fire watch with backup suppression equipment w/in 1 hour
Main Comp. room - Dedicated Roving Fire Watch w/in 1 hour
AND
restore or evaluate/write IR

Question 23

What is the purpose of the Fire Protection System?

Answer 23

Protect plant equipment and personnel from fire hazards

Question 24

What other purpose (other than protection) does the Cardox system provide?

Answer 24

Purges U2 and U3 main generators.

Question 25

Where is the CO2 supplied from?

Answer 25

Cardox Tank - TB 517 44 line. Refilled from truck connection by nitrogen storage tanks.

Question 26

What is the Cardox tank normally kept at (Temp/Pressure)?

Answer 26

0Deg. F, corresponding to 300psig | 7.5 ton tank

Question 27

What are the start and stop sets for the CO2 compressor?

Answer 27

Start at 305psig, stop at 295psig. This cools the CO2

Question 28

What are the primary flow paths for Cardox?

Answer 28

1) Each of the EDGs 2) Each Generator 3) Hose Reels 4) Alternate Supply to AEER * **EDGs and Generator on one header, Reels on second

Question 29

What is the initiation signal for Cardox to EDG rooms?

Answer 29

Auto - Heat Detector Manual - Pull Station Manual - Lever Selector Valves

Question 30

How do the Cardox Tank Master Pilot Valves Function?

Answer 30

1 for each header (EDG/Gen & Hose Reels) | Normally Energized closed by 125vdc, fail open on loss of 125vdc

Question 31

How do the Cardox Selector Valves function?

Answer 31

Used to direct Cardox Header to the required area. Normally de-energized closed - fail closed on loss fo 125vdc. Energized to direct CO2 to required area.

Question 32

How can the Cardox selector valves be activated?

Answer 32

Auto - Electrically by detection device Manually - push button by diesel room or exciter Manually - mechanically by lever in enclosed box.

Question 33

How do the Cardox Hose Reels Actuate?

Answer 33

By removal of nozzle from holders, sends signal to open pilot valves. Light illuminates when power is available.

Question 34

How does the Cardox system de-activate?

Answer 34

CO2 injected into different areas, which initiates a timer based on size of room and rate of discharge. After timer times out, selector valves close.

Question 35

Cardox Hose Reel initiation sequence?

Answer 35

Nozzle removed from holder. Red light on holder extinguished CO2 discharge valve de-energizes and opens bleeder valves close pneumatically after time delay to purge air from piping.

Question 36

What are the safety protection measures for the Cardox Tank?

Answer 36

Bleeder valve set to 341psig Relief Valve set to 357psig Rupture Disc

Question 37

What provides power to the Cardox system and valves?

Answer 37

125vdc 2A-1, circuit 14

Question 38

How does Cardox supply to AEER initiate?

Answer 38

MANUAL INITIATION from pushbutton (Main from 2A-1, Reserve from 3A-2, circuit 20; only one set of fuses which must be manually swapped) - 60 second delay, 3 minute timer starts initial CO2 discharge, 13 minute times starts extended discharge. * ***CAN BE STOPPED VIA PILOT VALVE LEVER RETURN TO NORMAL****

Question 39

CARDOX TRM - What must be done with one or more CO2 system inoperable?

Answer 39

Establish hourly fire watch w/in 1 hour AND Restore w/in 14 days or write IR/evaluate

Question 40

Cardox TRM - What is the minimum level and pressure for the Cardox Tank?

Answer 40

50% full, 250psig

Question 41

Gaseous FP TRM - How many valves must be able to operate and be found in required position per subsystem to be operable?

Answer 41

ALL OF THEM

Question 42

Halon TRM - What is the required weight and pressure (%) for each initial and extended discharge cylinder?

Answer 42

95% weight, 90% charge pressure

Question 43

Where are the timers and relays for the DG and Exciter Cardox systems?

Answer 43

DG - 2253-53 Panel | Exciter - 2253 - 58 Panel