ML20010G434

LER 81-040/03L-0:on 810818,chromated Water Found in Diesel Generator 102 Raw Water Due to Water Leaking Through Heat Exchangers.Cause Unknown.Raw Water Lines Drained & All Chromate Recovered

ML20010G434
Person / Time
Site:	Nine Mile Point
Issue date:	09/04/1981
From:	Neild R NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20010G433	List: ML20010G432 ML20010G434
References
LER-81-040-03L, LER-81-40-3L, NUDOCS 8109210085
Download: ML20010G434 (1)

Text

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h j l 012 l l During plant steady state operation an operator noticed a drop in the level of cucomatedl j g o l 31 l water in Diesel Generator #102. Chromated water was added and the level returned to l lo l4 l l normal but dropped again. An investigation followed and revealed that there was chro- l l o l 31 l mated water in the diesel generator raw water. This proved that the water had to be l g l0 ls l l leaking through the heac exchangers. Diesel generator #103 was started and proved oper-l l 0 l 7 l gble by surveillance test N1-ST-M4. Diesel Generator #102 was then renoved from servicep lo,g, l Two 115 kv power lines and one operable diesel were available which satisfied (OVER) l 7 8 9 80 C DE CODE SUSC E COMPONENT CODE SUS D'E S E

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41 42 43 l Y l 0 l 2 l 1 ll 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i1 lOIl The two heat exchangers were replaced with two refurbished heat exchangers from stock. l 11 lil l Diesel generator #102 was then started and was checked for operability. The diesel I jil2l l generator raw water lines were drained and all the chromate was recovered. On review l lil3l l of samples obtained during 102 heat exchanger replacement, no detectable concentrationsi li14l l of chromate were found in the discharge canal. It is unknown at this time (OVER) l 7 8 9 80 STA S  % POWER OTHER STATUS IS O RY DISCOVERY DESCRIPTION NA l1 l5 l l El@ l 0 l 9 l 8 l@l l l B l@l OPERATOR OBSERVATION l ACTivlTY CONTENT RELEASED OF RE LE ASE AMOUNT OF ACTIVITV LOCATION OF RELE ASE l 1 l 6 l [,Zj @ @l NA l l NA l PERSONNEL ExPOsMES NUMBER l1 l 7 l l 0l 0l 0l@lZ TYPE l @lNA DESCRIPTION l PERSONNE L tNJU' ES I NUMBER DESCRIPTION NA 11 la8 9l l 0l 0l 0l@l12 I 7 11 BIO 499

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9gfK05 85 810904 80 LOSS OF OR DAMAGE TO FACILtTY 43 TYPE DESCRIPTION 0002 O

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7 8 9 10 68 69 Richard Neild (315)353-2110, X1528 c NAME OF PREPARER PHONE: l

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES.

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what caused the leak. The heat exchengers will be-sent=back to the' manufacturer

,: for complete refurbishing. A report of the finding from the manufacturer will.

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i be furnished to Nine Mile Point #1 to ascertain-the cause,of the problem.

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