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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O s_- 1. 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 Load Changes During Routine f) 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. l k 9. 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:
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- ' The two bellows were replaced in PDT-1210 6 PDT-1209 and adjustments ;
were made to PDT-1228 6 PDT-1230.
I i 11. Failure Data:
The flow transmitters were Bailey Meter Type BY-3240X-A; 0-1000 inches H2 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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- 11. Failure Data: ,
l The flow transmitters were Bailey Meter Type- BY-3240X-A; 0-1000
) inches H2 O differential pressure transmitter.
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