05000220/LER-1981-040-03, /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

/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: 05000220/LER-1981-040, Forwards LER 81-040/03L-0 05000220/LER-1981-040-03, /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
References
LER-81-040-03L, LER-81-40-3L, NUDOCS 8109210085
Download: ML20010G434 (1)

LER-1981-040, /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

Event date:
Report date:
2201981040R03 - NRC Website

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60 El DOCKET NUMBER 68 69 EVENT DATE 74 7b REPORT DATE 80 l

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

l0 ls l l leaking through the heac exchangers.

Diesel generator #103 was started and proved oper-l g

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

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9 10 11 12 13 18 19 20 SEO'J E NTI AL OCCL'R R E N CE REPORT REVl310N LE R EVENT YEAR REPORT NO.

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l Y l 0 l 2 l 1 ll 33 34 35 36 37 40 41 42 43 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 l1 l5 l l El@ l 0 l 9 l 8 l@l NA l

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ACTivlTY CONTENT RELEASED OF RE LE ASE AMOUNT OF ACTIVITV LOCATION OF RELE ASE l 1 l 6 l [,Zj @

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'PDR 499 85 810904 7

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0002 O LOSS OF OR DAMAGE TO FACILtTY 43 TYPE

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Richard Neild (315)353-2110, X1528 c

NAME OF PREPARER PHONE:

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES.

, technical specifier.:1.ons.

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

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