ML20203J833
| ML20203J833 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 12/10/1997 |
| From: | FLORIDA POWER CORP. |
| To: | |
| Shared Package | |
| ML20203J799 | List: |
| References | |
| AP-513, NUDOCS 9712220110 | |
| Download: ML20203J833 (17) | |
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INFORMATION O NiuY Ae-sis TG T0XIC GAS 1.0 ENTRY C0flplIJAR$
JI En.y of the following conditions exist:
- Toxic gas is detected at CR-3
- Toxic gas is detected at Units 1 and 2 Not1fied by Fossil Unit of toxic gas that may affect CR-3
'e Itifff use this procedure.
i 9712220110 971211 PDR ADOCK 0500 2
Approved by MNP0 -
Date /2 4 /97 (SIGNApfRE ON FILE)
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2.0 IMMEDIATE ACTIONS
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ACTIONS DETAILS 2.1 Select both " CONTROL COMPLEX HVAC ISOLATE / RESET" switches to "IS0",
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3.0 F0LLOW-UP ACTIONS f
ACTIONS DETAILS-3.1 --
- Notify-personnel of plant e
STA conditions..
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Plant _ Operators.
e-SSOD-(evaluate plant' conditions for potential-entrya
-into Emergency Plan) 5 i
- e Fossil Units t
e TSC (if activated) e d
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i 3.0 FOLLOW-UP ACTIONS (CONT'D)
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ACTIONS DETAILS CAUTION With all CC ventilation stopped, the CC may reach its design limit of 95'F in as little as 30 minutes.
3.2 Verify All CC dampers properly aligned, AHD-12 closed AHD-12D closed AHD-2C closed AHD-2E closed AHD-lc closed AHD-lE closed r
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AHD-3 open 1[ AHD-3 closed, AHF-17A AHF-17B THEN stop a_ll CC supply and return fans.
AHF-18A AHF-18B AHF-19A AHF-19B D.
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.i 3.0 FOLLOW-UP ACTIONS (CONT'D)-
ACTIONS DETAILS 3.3 11 at any time, Control Room atmosphere becomes
-- AHF-17A AHF-178 uninhabitable, IllM stop All CC supply AHF-18A AHF-188 ano return fans and den air packs.
AHF-19A AHF-19B g
If AHi-20A or AHF-20B were running in slow speed when toxic gas actuated, AHF-44A, AHF-448 and AHF-30 will remain available.
3.4 If AHF-20A,-
AND AHF 20B are stopped, AHF-44A THEN ensure All auxiliary fans are stopped.
AHF-44B
,G AHF-30 Q)
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4 Applicable carry over steps:
3.3-11 Control Room atmosphere becomes uninhabitable...
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9 3.0 F0LLOW-UP ACTION $'fCONT'D)
ACTIONS l DETAILS-3.5:
Determine the cause and 6 Notify PPO to report local toxic. gas
. location of the toxic gas monitor-indications-(164 ft CC south actuation.
wall):
AH-648 CE
- AH-652-CE AH 649-CE 1
AH 653-CE e Review the following computer group 9 computer points:
S263 Train A C1, S297 Train B C1, i
1 S298 Train A_S0,.
S299 Train B S0, e Notify Health Physics to sample the following areas for toxic gas:
Control Complex Berm Area l
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Applicable carry-over stepsi_
3.3-If Control Room atmospher.e becomes uninhabitable...
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- LjlF0LLOW-UP ACTIONS (CONT'D)
-ACTIONS-DETAILS-3.6 Evacua'te affected areas as-1 Determine area evacuation based on-L required..
the following:
- t Source of-toxic gas P
Atmospheric: conditions Inhabitad or-not Evacuation route 2
If evacuation is required, M G perform the following:
Depress appropriate evacuation alarm push button if required.
Notify plant personnel over PA.
Repeat.PA announcement.
O 3,7 WHEN Health Physics IE toxic gas monitors are in reports outside atmosphere
- alarm, toxic gas concentration E G purge toxic gas from has lowered to safe-intake duct by performing the levels.
following steps in order:
ELN purge CC intake duct if required.
.__ Select " DAMPER OVERRIDE" switch to "0N".
Adjust "CNTRL COMPLEX RECIRC DMPR" potentiometer to "10" (Full Flow) position.
WHEN toxic gas monitor alarms reset, THEN place "CNTRL' COMPLEX RECIRC~DNPR" in "0" position.
Select " DAMPER OVERRIDE" switch to "0FF".
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- s 3.0 F0LLOW-UP ACTIONS (CONT'D) s rs
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-ACTIONS-DETAILS 3;8' Restore CC ventilation to 1
- Select both " CONTROL COMPLEX normal.
HVAC ISOLATE / RESET" switches to " RESET".
t 2-Ensure all dampers properly reposition:
Open AHD 17 AHD 2E AHD ~2 AHD-lC AHD 2C AHD-lE Closed AHD 3 3 Ensure only one train of CC ventilation operating:
A Train B Train
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AHF-17A AHF-17B
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AHF-19A AHF-19B 4 Start All fans in one of the following trains:
A Train B Train AHF 20A AHF-20B AHF-44A AHF-44B AHF-30 AHF-30 5
Verify AHD-12 open.
6 Verify AHD-120 open, 7
Ensure AH-32-FIR, Channel A indicates = 35,000 scfm.
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3.0 FOLLOW-UP ACTIONS (CONT'D)
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ACTIONS DETAILS 3.9 EXIT this procedure.
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