ML19309H492

Ro:On 800503,poison Section of Control Rod Assembly Found Separated from Rod Drive.Failure Did Not Compromise Shutdown Margin.Rod Replaced & Reactor Returned to Power. Remaining Rods Will Be Closely Monitored Until Insp

ML19309H492
Person / Time
Site:	05000054
Issue date:	05/05/1980
From:	Voth M UNION CARBIDE CORP.
To:
References
NUDOCS 8005130385
Download: ML19309H492 (1)

Text

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7 9 5'r N ,o5 c[,i'( s ],i gs.: 8 0 0513 OSFS lj UNION CARDIDE CORPORATION $

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M t DIC A l. pnODUCTS OlVISION

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May 5, 1980  ;

I n ir ec to r , Itc y. t on i U. R. Nuctent Regulatory cnemt uton J 631 Park As+nue l King of Pru==ia. PA 19406 l Deor Sirt l tb May 3, 1980, the poison scetten of a control end assembly no foumi separatc<1 from the ro<l enrive la che tinton Carlaide Nuclear Reector, Licenne %=her R- 01. Thja t <a reportable p ur a nnrit to Technieml Specifica-tion 6. 5. 3.a . (3) (b) since tl at reI van not v.ithin toi, nf the menn rod pocitton am r cpitr al by J tt:iiting ccmd Ltion for operation 3.6.c.(2). Mr.

D. Caphton was duly inforried by telephone Ltday.

The f a i lur e di d riot eumprime the whutdown margin since the Ceparnt e.1 por tion was ennfine d to the core. A= expected, the renulting flus tilt wa= insufficient to enuse bo11 sng. The fa12u,1 rod has been r e--

piccod and the reactor returned to pcVenci 2t is pr esent.ly uoderacing hot cc11 oxamina tion. Untti the r e-aining control rode are inspected for in-eipient fatturea, their inteprity will be gnaured by closely rinnitorina acng positjen at power and verifying a reactivity reaponse to rod :=ovement.

Yourn very truly, a

I [NQs OJL02.tt.4 MIVtitm Marrun H. Voth Manager Nuclear Operation = 1 D**D' T od w S .Yg 'NU%

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