ML17252B548

LER 80-033/03L-0 for Dresden, Unit 2 Re the Frequency of Water Addition to the Torus Increased. Leak Rate Tests Indicated a Leak in the 2B LPCI Heat Exchanger

ML17252B548
Person / Time
Site:	Dresden
Issue date:	10/01/1980
From:	Scott D Commonwealth Edison Co
To:	James Keppler NRC/RGN-III
References
DJS LTR 80-135 LER 80-033/03L-0
Download: ML17252B548 (2)

Text

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Co ~ nwealth Edison

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Dresde'

• Nuclear Power .station R.R. #1 Morris, Illinois 60450

• Telephone 815/942-2920 October 1, 1980 DJS LTR #80-135 :

James G. Keppler, Regional Director Difectorate I

of Regulatory Operations - Region III U.S. Nuclear Regulatory Commission 799I Roosevelt Ro~d .

Glen I

Ellyn, IL 60137 .

I . . .

Reportable Occurrence Report #89-33/03L-0; Docket #050-237 is"being sufumitted to youi office in accordance with Dresden Nuclear Power St~tion Technical Specification 6.6.B.2.(d), abnormal degradation ofisystems other than those speci:fied in item B.1.e *. above designed to1con~ain radioactive materia~ resulting from the fission process~

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e~j)Wtt-Station.Superintendent

• Dresden* Nuclear Power Station I

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Enelosure I Director of Inspection *& Enforcement CCI Director of Management Inf°ormation & Program Control U.S. NRC, Document Mgt. Branch I File/NRC i

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'*; ~EVENT'OESCRIPTlON'A'";'l?'PRO.BABl.'ECONSEOUENCES@:" *: *. *  :. ** . . .* . . : . *.. .. ', . ~ * . . . *** :.>.- . . :~:;

j O' ! 2 f) Du ringc rtotl: o 1foratiens*;, thedreqµ>m cy'* of .::water: addi t i'on

• td ..the* tor'usc inc re,ase.d '. .* Leak~~ *~;

~ 0 I 3. (1 rat'e tes.ts-, in.dica.ted*.. a. :leak tn>>_t-~e *z:B~ LPCI. Hei:it. E~~h~~ger.*.. q. Th'Ei sYstem: was isolated, 'atid:1;,:.*

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,_- _ f'. l_the*. tube'. lfaks' wer*e:; p~u,g~e~.; .* The:' heal th and. safety' of the. general. pub1ic: was. not en~*** */1,*:.:  :;)~

I0 Is 1:-1 dangered b~caus'e* red.unda~-t*' sub$ystenis, ;,were, oper~b1e~ . similar*events* ha~.e: :oc'curr~d*, 'the~;.tr\.r.:

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c;o.use OESCRIP.;TION ANO CORRECT;lVE.ACllONs:@.. .. . . . ." . .. ;.- ' . . ,::.

[J))] IForty:..,suc ~µbes-: in: the- LPCLHeat; EXchanger* were' l'eaking**~. '.*The. p.tobabie- cause. was corro-*. t.<~*;

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• co~~~cttve~**acd.on::was* to: .plug;tri~se leaking t~bes. *. The Heat Ex-* f': .~.

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o::ITI. ,.changer wa~: then retestect' t:o . ve'l"ify th~t~leakagi' h~d':_been s~topp~d';'* Monthly leak check  ::L:<*

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CIEl )further Te1i<.s:. are o~ing: investigated* *by Statfo:ri.:N~c*Iea;: Engi~eering: .and the Station:< .. Ii':\:,

8 F!~ILITY STATUS

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