ML19319E585
| ML19319E585 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 03/14/1977 |
| From: | Mardis D ARKANSAS POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19319E582 | List: |
| References | |
| NUDOCS 8004110836 | |
| Download: ML19319E585 (5) | |
Text
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Reportable Occurrence Report No.
50-313/77-6 2.
Report Date: 3/15/77 3.
Occurrence Date:
2/19/77 4
Facility:
Arkansas Nuclear One-Unit 1 Russellville, Arkansas 5.
Identification of Occurrence:
Failure of the High Pressure Injection Flow Transnitters (PDT-1210 6 PDT-1209) on Loop "A" and the Flow Transmitters (PDT-1228 6 PDT-1230) on Loop "B" being out of manufacturer's tolerance.
6.
, Conditions Prior to Occurrence:
Steady-State Power Reactor Power 0
MWth Hot Standby Net Output 0
MWe Cold Shutdown Percent cf Full Power 0
g Refueling Shutdown X
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Load Changes During Routine Pcner Operation V
Routine Startup Operation Routine Shutdown Operation Other (specify) 7.
Description of Occurrence:
At 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br /> on February 19, 1977, while performing a surveillance test on the HPI flow transmitters, it was discovered that the two flow transmitters on Loop "A" (PDT-1210 and PDT-1209) had failed and the two flow transmit.ters on Loop "B" (PDT-1228 and PDT-1230) were out of the recommended manufacturers tolerances.
The bellows of. PDT-1210 and PDT-1209 had failed, therefore the flow indicator would not have indicated flow upon the actuation of an ES signal.
PDT-1228 would have indicated flow 1% low and PDT-1230 m
would have indicated 4% low upon actuation of an ES signal.
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\\s Reportable Occurrence Report No.
50-313/77-6 8.
Designation of Apparent Cause of Occurre-e:
Design Procedure Manufacture Unusual Service Condition Including Environmental Installation /
Construction Component Failure (See Failure Data)
Operator Other (specify)
X O'ne bellows appeared to have failed due to fatigue and the other bellows appeared to have failed due to being over pressurized.
The reason for two transmitters being out of tolerances is unknown.
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Analysis of Occurrence:
Since both HPI loops remained operable even though the transmitters were inoperable or inaccurate, there was no hazard to the health to the health and safety of the public.
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t Reportable Occurrence Report No.
50-313/77-6
- 10. Corrective Action:
1 The two bellows were replaced in PDT-1210 6 PDT-1209 and adjustments were made to PDT-1228 6 PDT-1230.
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Failure Data:
The flow transmitters were Bailey Meter Type BY-3240X-A; 0-1000 inches H O differential pressure transmitter.
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Reportable Occurrence Report do.
50-313/77-6
-10.
Corrective Action:
The two bellows were replaced in PDT-1210 5 PDT-1209 and adjus tments were made to PDT-1228 4 PDT-1230.
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Failure Data:
l The flow transmitters were Bailey Meter Type-BY-3240X-A; 0-1000
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