ML19326C062

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RO 50-313/76-08:760511,diesel Generator 1 Failed to Start on Simulated Engineered Safeguards Actuation.Caused by auto-start Circuit Diode Failure.Diode Replaced & Generator Tested for Operability
ML19326C062
Person / Time
Site: Arkansas Nuclear Entergy icon.png
Issue date: 06/07/1976
From: Cook R
ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML19326C061 List:
References
NUDOCS 8004180736
Download: ML19326C062 (4)


Text

i LICENSEE EVENT REPORT CONTROL OLOCh.t I

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Of?CKET NUMf!rn N

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I l i_ l,W 1015101-101311131 1015l11117161 101610171716l 7 8 57 58 59 GO 61 60 69 74 15 UO EVENT DESCRrPTION

@E IEesel Generaleal f.3;ted to start ow simulated E.S. actuation doinq ekeeks l

7 09 80

@ lov parate v b integrated E.S. test. Diesel Generatov #2 was sut>se9eenElv i

7 89' B0 H llest actuated and sfarted as required. A faii,a <tr.a2 was re,iacea as 1 i

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- onbilih. (50-313/76-8) 80

@ l Re auto start circuit tested, orovinq I

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pny, 80 rN CInt COMPONENT CODE A

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[AJ IWIi12101 (NJ 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION lA failed Cliede iw the auto shyt ei cuit b b.G51 caused the D.G. lo 7 ail l

O 7 89 80 M lb stavl ow simubbd E.S. achallow, biode was reotace<l awd D.G.* I l

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% row tn OTHtn Status SCovEn OSCOVERY DESCRipif0N IHI 1010101 I N A I

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10 12 13 44 45 46 80 AthYsr0 ch ASE MOUNT OF ACTIVITY LOCATION OF RELEASE lZj llJ l N A I

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10 11 44 45 80 PERSONNEL E)rPOSURES Nuuntn tvet ctccmptroN

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7 09 11 12 13 80 PERSONNEL INJURIES Nt'Metn H lO10101 1CESCA@ LOA N

l' 7-89 11 12 80 OFFSITE CONSEQUENCES i

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7 00 80 LOSS OR OAMAGE TO FACIUTY f vf4 DL c.C1811'f N f t) ns [gj l

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7 09 10 00 Pil0L! CITY i

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'N ADOITIONAL FACTORS (ji NA

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NAME:

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PHONE:

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I I-llenortatile occurrence I:Je io r t _un. 5f t-31'3/76-8 l

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,iteport Da t e: 6/7/76 3

Occurrence Date:

5/11/76 4.

Iacility:

Arkansas flucicar One - Unit 1 Itussc11v111c, Arkansas i

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Identification of Occurrenec:

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Diesel Generator #1 failed to start on simulated E.S. actuation.

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Conditions Prior to Occurrence:

2 Steady-State Power _

lteactor Power 0

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llot Standby Net Output.

O We Cold Shutdown Percent of Ful1 Power 0

  • 5 i

Refueling Shutdown Load Changes During Routine Power Operation Routine Startup Operation

  • Reactor de-fueled for surveillance Routine Shutdown specimen holder tube repairs.

Operation

,3 Other (speci fy)

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Description of Occurrence:

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During checks' preparatory to integrated E.S. test,: Diesel Generator #1 was actuated by E.S. relays, but failed t'o start.

Diesel Generator #2 was subsequently test-actuated, and started as required.

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Attachuent "C"-

. fla rch 27,- ' 11176 NS.P-10, Itev. 4 Page 2 of 4

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&l Iteportable Occurrence !!cport No. 50-313/76-8 l

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11csignat ion of Appa rent Cause of Ocontrence:

t llesi gn procedu rc ilanufacture IJnusual Service Condition

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Ihcluding I!nvironmental Ins talla tion /

X Construction.

Component Failure t

Operator

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Other (specify) i i

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Analysis of Occurrenec:

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I There were no safety implications 1or hazard to th'e health and safety of the public since Diesel Generator #1 remained manually operrible and redundant Diesel Generator #2 was capable of auto actuation.

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Atiachnent "C" l

Phrch 21, 1970 11SP-ill, Ite v.

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Iteportahic Occurrence !!cport ilo.

50-313/76-3.

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Correctivc Act ion:

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l The failed diode was replaced and the dicsci auto-start circuit tested

-l proving operability.

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Failnro Data:

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No previous; failures of this type.

Equipraent' identification:

1 CR-1 i>1ocking rectifier lle'stinghouse IN-1194 i:

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/it ta cluitent "C"

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