ML19323F655
| ML19323F655 | |
| Person / Time | |
|---|---|
| Site: | Oconee, Crane  |
| Issue date: | 06/22/1977 |
| From: | Scott R DUKE POWER CO. |
| To: | |
| Shared Package | |
| ML19323F652 | List: |
| References | |
| TASK-TF, TASK-TMR EP-O-A-1800-3, NUDOCS 8005290283 | |
| Download: ML19323F655 (4) | |
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l OCONEE NUCLEAR STATION
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l REACTOR TRIP 5
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1.0 Symptoms Channel. trip alarm on tuo or more reactor protective channels.
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I 1.2 droups 1-7, control rod "in limit" light on.
1.-3 NI's indicating a rapid decrease in neutron power.
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1.4 ICS runb'ack in progress, l
1 2.0 Immediate Action I
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I 2.1 Automatic-f Control rod groups 1-7 d:cp into the core, g
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'2.1.2 Turbine generator trips.
t Unit auxiliary load transfers to startup transformer.
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2.1.4 Turbine bypass valves open at setpoint +125 PSI.
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Feedwater runback to minimum level in OTSG's.
2.1.5 2.2 Manual iI I
Verify automatic actions occur, if not, perform manually.
2.2.1 2.2.2 Verify neutron level decreasing.
2.2.3 Close (2)(3) EP-5 (Letdown Isolation).
2.2.4 Maintain LDST level by adding water with boron concen-tration > RCS boron concentration.
2.2.5 If pressurizer level cannot be maintained due to severe shrinkage open (2X3) HP-26.
NOTE:
(2)(3) "C" HPI Pu=p can be used to maintain i
pressuri ct level if needed.
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3.0 Subsequent Action
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3.1 Notify unit supervisor and arga dispatcher -
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3.2
'w rify OTSG's controlling at' minimum level.
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E 3.3 Determine cause of trip and correct-l t
3.4 If LDST level approaches zero, open (2)(3) HP-24 to supply i j
.i.t HPI pump suction from BWST.
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l8 3.5 Go to one hoewell pump, one condensate booster pump, and one
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'feedwater pump, as required -
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- 0. pen (2)(3) HP-5 when pressurizer level returns to normal.
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Tea DATE:
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