ML19309H492

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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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UNION CARDIDE CORPORATION 8 0 0513 OSFS lj dQ8il')d M t DIC A l. pnODUCTS OlVISION N '

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May 5, 1980 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 Deor Sirt 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 r cpitr al by J tt:iiting ccmd Ltion for operation 3.6.c.(2).

Mr.

pocitton am 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 =

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