ML19320A110

AO 50-313/74-13:on 741123,reactor Protection Sys Failed to See Coolant Pump Trips.Caused by Pump Monitor Relay Maladjustment.Relays Immediately Adjusted

ML19320A110
Person / Time
Site:	Arkansas Nuclear
Issue date:	11/24/1974
From:	Phillips J ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML19320A095	List: ML19320A094 ML19320A100 ML19320A104 ML19320A110
References
NUDOCS 8004140713
Download: ML19320A110 (1)

Text

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SUHJECT ac< aNs a 5 NUCLE AR ON': UNIT ONE ASNORHAL OCCI'RANCE NUtiGER 50-313/73-13 AT 2202 "0045 04 11-23-7a, AT 20 PERCENT PEACTOR POWER, REACTcR COOLANT PU*DS A AND D WEDE SliUT 00hN F00 T'a0 MONTH TCSTING. AT 2210 WOU;S A REACT 0u vp0TECTION SYGTEM CHECK wAS "10E AND IT oAS FOUNO THAT THE kPs Ot0 NOT SEE A ANO D PUNP3 TRIPPEO. A AND 0 PUuPS

• ERE RESTARTED AND B AND C PUMPS TRIPPED WITH RPS GIVING SAME INDIC'ATION

. THE DUMP MONITOR RELAYS WERE ADJUSTED ON' 11-22-73 AND APPARENTLY dERE NOT ADJUSTED PROPERLY. THIS ape' EARS TO BE A P'70CEDUR AL DEFICIENC Y.

RELAYS WERE IMMEDIATELY READJUSTED AND TESTED BY TRIPPING OF EACH

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DUMP TO VERIFY PPS QESP'1SE. TWERE"WAS NO Ht.ZZARD TO THE' HEALTH -

AND SAFETY TO IHE PutiLIC DUE TO..IMMEDI ATE CORRECTIVE ACTION COMPLETED

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