ML20204D578

Rev 10 to AP-513, Toxic Gas

ML20204D578
Person / Time
Site:	Crystal River
Issue date:	03/09/1999
From:	Joshua Wilson FLORIDA POWER CORP.
To:
Shared Package
ML20204D567	List: ML20204D563 ML20204D572 ML20204D578 ML20204D582
References
AP-513, NUDOCS 9903240245
Download: ML20204D578 (15)

Text

TG REV 10 AP-513 x

T0XIC GAS 1.0 ENTRY CONDITIONS JF any of the following conditions exist:

• Toxic gas is detected at CR-3

• Toxic gas is detected at Units 1 and 2 Notified by Fossil Unit of toxic gas that may affect CR-3 THEN use this procedure.

2.0 IMMEDIATE ACTIONS NOTE 1

( There are no immediate actions for this procedure.

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w 3.0 FOLLOW UP ACTIONS ACTIONS DETAILS 3.1 Select both" CONTROL COMPLEX l'VAC I.SOLATE/ RESET" switches to

.IS0" 3.2 Notify personnel of plant

• STA conditions.

• Plant operators

• NSM (evaluate plant conditions for potential entry into Emergency Plan)

• Fossil Units TSC (if activated) l

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v CAUTION With all CC ventilation stopped, the CC may reach its design limit of 95*F in as little as 30 minutes.

3.3 Verify all CC dampers are i properly aligned. AHD-12 closed i AHD-12D closed AHD-2C closed AHD-2E closed i l

AHD-1C closed j AHD-1E closed AHD-3 open i

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+. 3.0 FOLLOW UP ACTIONS (CONT *D)

-ACTIONS DETAILS.

3.4 2 at any time, toxic gas

• Stop all CC supply and return fans:

'evels in Control Room un t$be AHF-17A AHF-17B E"

a ons AHF-18A AHF-18B AHF-19A _ _ AHF-19B 1

• Don air packs.

NOTE Chemistry Lab exhaust fans can operate while toxic gas is actuated when CC exhaust fan is running in slow speed.

3.5 JE CC exhaust fans are A sto) ped. AHF-30 V TH 9 ensure Chemistry Lab fans are stopped. AHF-44B AHF-44A i

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Applicable carry-over steps:

3.4 If toxic gas levels in the Control Room become uncomfortable..

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, 3.0 FOLLOW UP ACTIONS (CONT *D)

ACTIONS DETAILS 3.6 Determine the source of

• Notify PPO to report local toxic gas toxic gas actuation. monitor indications (164 ft CC south wall):

AH-648-CE AH-652-CE AH-649-CE AH-653-CE a

Review the following computer points (group 9):

S263 Train A C1 2 '

S297 Train B Cl 2 S298 Train A S02 S299 Train B S02 Notify Health Physics to sample the following areas for toxic gas:

Control Complex Berm Area l

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Applicable carry-over steps: '

3.4 JF toxic gas levels in the Control Room become uncomfortable.

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"4 3.0 FOLLOW UP ACTIONS (CONT'D)

ACTIONS DETAILS 3.7 Evacuate affected areas as 1 Determine area evacuation based on required. the following:

Source of toxic gas Atmospheric conditions Inhabited or not

' Evacuation route 2 .I_E evacuation is required.

THEN perform the following in order:

Depress appropriate evacuation alarm push button as required. J Notify plant personnel over PA.

Repeat PA announcement.

[V3 3.8 -WHEN Health Physics reports toxic gas concentration in outside atmosphere has lowered to safe levels.

THEN continue in this procedure.

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.e h 3.0 FOLLOW UP ACTIONS (CONT'D) l Ll  :- ACTIONS DETAILS l 3.9 IE toxic gas monitors'are 1 Ensure 1 CC supply fan is running:

in valid alarm.

THEN purge toxic gas from AHF-17A intake duct.

AHF-17B AHF-18A AHF-188 2 Ensure l'CC return fan is running:

AHF-19A AHF-19B 3 Ensure AH-193-FC "CNTRL COMPLEX RECIRC DMPR" is set to "0" (AHD-3 full open).

4 Select " DAMPER OVERRIDE" switch to "0N".

O 5 Adjust AH-193-FC "CNTRL COMPLEX RECIRC DMPR" to "10" (AHD-3 60' open).

3.10 WHEN toxic gas monitor alarms reset, THEN continue in this procedure.

3.11 'IF " DAMPER OVERRIDE" 1 ~~ Adjust AH-193-FC "CNTRL COMPLEX Eitch is "0N". RECIRC DMPR" to "0" (AHD-3 full THEN' restore CC recirc- open) ..

damper to normal.

2 Select " DAMPER OVERRIDE" switch to "0FF".

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s- 3.0 FOLLOW UP ACTIONS (CONT'0)

-ACTIONS DEIAILS 3.12 Align-CC ventilation to-

• Select both " CONTROL COMPLEX HVAC normal. ISOLATE / RESET" switches to " RESET".

A Train l B Train 1

3.13 Restore'CC ventilation. 1 Ensure 1 CC supply fan is running:

AHF-17A AHF-17B AHF-18A AHF-18B 2 Ensure 1 CC return fan is running:

AHF-19A AHF-19B l l

3.14 Verify CC dampers are properly positioned. Closed AHD-2C Open AHD-2E AHD-1C 1

AHD-1E AHD-3 t

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o 3.0 FOLLOW UP ACTIONS (CONT'D)

. 'd - ACTIONS DETAILS 3.15 Restore CC area exhaust 1 Ensure 1 CC exhaust fan is running:

. fans.

AHF-20A

'AHF-20B 2 Ensure 1 Chemistry Lab exhaust fan is running:

AHF-44A AHF-44B 3 Start AHF-30 1

3.16 Verify CC 95 ft supply '

dampers are open. AHD-12 AHD-12D 3.17 Ensure AH-032-FIR. Channel A indicates approximately 35,000 cfm.

3.18 EXIT this procedure.

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