ML20038C209

Updated LER 81-054/04X-1:on 811103,determined Leak Existed in Sys Coolers Causing Low Level Alarm on Control Fluid Sys on 811031.Caused by Tube Failure in Cooler.Tube Plugged & Unit Returned to Svc

ML20038C209
Person / Time
Site:	Cook
Issue date:	12/02/1981
From:	Stietzel J INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20038C198	List: ML20038C197 ML20038C203 ML20038C209 ML20038C212
References
LER-81-054-04X, LER-81-54-4X, NUDOCS 8112100267
Download: ML20038C209 (2)

Text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION (7 771 -

UPDATE REPORT - PREVIOUS REPORT DATE 11/11/81

- LICENSEE EVENT REPORT (PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATIOM)

CONTROL BLOCK: l 1

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5 7 C A I 68 7

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s$RCe 60 l L l@l 0 lDOCAET 61 510 NUMBER l 0 l 013 l681 16 69 @l 1 DATE EVENT 11 10 !3 l 811 l@b 14 75 REPORT Dl2 AT El0 l260la 11 l@

EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h 1o l2l 10N OCTOBER 31, 1981, AT APPROXIMATELY 1100 HOURS. A LOW LEVEL ALARM ON THE CONTROL l I o ]T] l FLUID SYSTEM WAS RECEIVED INDICATING A LOSS OF FLUID. THIS SYSTEM TYPICALLY CONTAINS l l o 14 l l2500 GALLONS OF FYRQUEL FLUID, A FIRE RESISTANT TRIA.RYL PHOSPHATE ESTER. BY 0550 l lolsl l HOURS ON NOVEMBER 1, 1981, 275 GALLONS HAD BEEN ADDED TO THE SYSTEM TO MAKE UP DUE l l

1o is l lTO THE LOW LEVEL ALARM. AT THIS TIME IT WAS DETERMINED THAT THE LEAK EXISTED IN THE lol7l l SYSTEM COOLERS, THESE COOLERS WERE THEN ISOLATED. (SEE SUPPLEMENT) l l

l ois i i 80 t 7 8 9 C DE CODE SLBC E COVPONENT CODE SUBC DE SU ODE Q

7 8 9 l H l A lh Wh lB lh l Hl Tl El Xl Cl Hlh Wh W h 10 11 12 13 18 19 20 SEQUENTI AL OCCUR A ENCE REFORT REVISION RFPORT NO. CODE TYPE NO.

LER RO _ EVENT YE AR O gg L81 11

_ 21 22 l-l 23 1015141 24 26 1-1 27 l0l4l N 29

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31 W32 TAK ACTO ON PLANT V TH HOURS SB IT FO 1 8. SU

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41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l

ITTo 1 1 THE INVESTIGATION REVEALED THAT A TUBE FAILURE HAD OCCURRED IN A COOLER ALLOWING I

li Ii l [275 GALLONS OF FLUID TO ENTER THE LAKE THROUGH THE CIRCULATING WATER DISCHARCE.

iil71 l0NE tub" WAS FOUND TO HAVE FAILED, THE TUBE WAS PLUGGED AND THE UNIT RETURNED TO I l i l 31 l SERVICE. IN T1E FUTURE, THE COOLERS WILL BE IMMEDIATELY ISOLATED UPON RECEIPT OF l l

[il4l l THE LOW LEVEL / LARM IF NO LEAK IS APPARENT. 80 7 8 9 STA S  % POWER OTHE R STATUS DISCO R DISCOVERY DESCRIPTION 11 1 s l l E l@ l 1l 0l 0;@l N/A l l A l@l ALARM l ACTtVITY CONTENT RELEASEO OF RELE ASE AVOUNT OF ACTIVITY LOCATICN OF RELEASE

[1l6]8 9W h l Zl10 @ l N/A l l N/A l 7 11 44 45 80 PERSONNEL EXPOSURER Nf JYB E R TYPE DESCRIPTION -

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PDR l 68 09 lllllllll1lllk 80 5 NAME OF PREPAREH

• • PHONE: (616) 465-5901

gP.LEMENT TO AE0 81-054/04 X-1

- November 9, 1981 nobert J. Courchai.ne '

Executive Michigan Wa'.er nesour,ces CommissionSecretary Stevens T.

Box 30029 ?!ason Building- .

Lansing, Michigan 48926 .

. F.e : Donald C. Cook Nuclear Plant NPDES Pe'..mit 1:o. MI OC05527

-Daar Mr. Courchaine-2, This letter confirms t 1981 with Mr. Mike Dack in Crand Rapidsour ' clcphone converua Lion of ?o requirerw=nts, of Part II A 5

- Spill No tificaand tionresvanda to the

- crenced perr.it. -

of the re f--

+ ,

a low-levelOn Saturday, alarm onOctober the Unit31, 1991, at approxim telv 1109 honra, System initiated, indica ting loss of fluid.2:Energency I!ydraulic' Control.

contains phosphate2500 ester, gallons of rynoucL 1:1:c, a Thin syste:i typically Wstport , Connecticut, manufac*:ured by S t. 2u f fer fireChe:-ica ro n i .r.c an t triarvi l Cormarr, o"f Dy 0550 hmarn on ::ov-w%cr , 1 ;> 3 '. , f i.ve h umst of whicn ic:e fluid it was (275 aallons) had been added to the sy ter. at

'That purposes. system utilizen deterrined Lake Michidan a leahwater existed in an nic .moler.

lane throughIt was deternined that the lostfor non-contac: cooli:m vas flu i t! hl entered tn d-immediately icciated and a.ttsbd falure wethe plant.'s .

Th eci. frcul.4 a te.:. ting cause of the fluid loss. fo un 1 to b~' :- h e -

Stauffer Chemical Company advisen that non-petroleum, FynOU  : c, Enc is a toxic than table salt. The non-PCD, non-ir t-1 ta tin g sub.atar:ce $nd is 1 es;s making retrieval of the materialfluid haa'a specific gra vi ty of 1.14

• from 1.ahe Michi'rcn 1: pr' aeeical. ,

returned Repairs to service. to the cooler hav9 been made and the mit L .- > t .--en received and no leak isInapparent, the future, when a low-level salarm iu bo isolated to deternine the coolers w311 ir : ceiately -

the reason for such alarm. * "

Very truly yours, -

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• Jack A. Druckemiller ,

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Mike Deck, Water Ouality Divi =1on, 3-- '

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