ML20083R084

Ro:On 720628,during Routine Analysis of Radwaste Outside Tank,Activity Found Exceeding Tech Spec Limit.Caused by Overflow of Waste Neutralizer Tanks During Regeneration of 1-7 Condensate Demineralizer.Procedure Modified

ML20083R084
Person / Time
Site:	Oyster Creek
Issue date:	07/11/1972
From:	Finfrock I JERSEY CENTRAL POWER & LIGHT CO.
To:	Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC)
Shared Package
ML20083R087	List: ML20083R084
References
NUDOCS 8303310373
Download: ML20083R084 (2)

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>5 Jersey Central I awer & Light Company u

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M ADISoN AVENUE AT PUNCH BOWL RO AD e MORRISTOWN. N.J. 07960 e 539-6111 l

July 11, 1972 l

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Oy Mr. A. Giambusso h~O

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Deputy Director for Reactor Projects f (,.

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Directorate of Licensing United States Atomic Energy Commission d

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Washington, D. C. 20545 p

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Dear Mr. Giambusso:

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Subject:

Docket No. 5 -219 N

l Oyster Creek Station

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Outside Radwaste Tank Activity j

The purpose of this letter is to report an incident that-,

l occurredatOysterCreekinwhichtheoutsideradwastetankactivity)

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exceeded the total activity limit of 10 curies as set forth in l

Technical Specification 3.6.C.

Routine analysis of the radwaste outside tank activity, as required by Paragraph 4.6.D of the Technical Specifications, was made during the 8-4 shift on June 28, 1972. As confirmed by final analysis',

which was completed at 9:30 p.m.,

a total of 12.78 curies were present l

at the time of sampling.

10.48 curies were contributed by the contents of floor drain sample tank A.

The source of this high activity water was traced to the /

_ overflow of waste neutralizer tanks A and B during regeneration of

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l-7 condensate demineralizer. Tank space in the waste neutralizer

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tanks had been minimal when completion of _l-7 co"densate demineralizer resin regeneration became necessary due to high differential pressure developing across the condensate demineralizers./ In attempting to continue the regeneration, both waste neutralizing tanks overflowed to 1-9 floor drain sump in radwaste. The concentration of activity in this water was quite high as a result of it being regenerate j-pater from the 1-7 condensate demineralizer. Floor drain sump 1-9 pumps directly to the floor drain collector tank from where the water was processed through the floor drain filter and into floor drain saaple tank A.

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Mr. A. Giambusso Page II July 11, 1972 Floor drain sample tank A was routinely cycled into the waste neutralizer tanks as space became available during'the 8-4 shift on June 28, 1972.

Back calculations indicate that the activity -

in the outside tanks was less than 10 curies by 3:00 p.m. and in fact, was 1.54 curies by 3:30 p.m.,f When calculations of the outside tank activity were completed late in the evening, the water remaining in floor drain sample tank A was transferred to the waste neutralizer tanks inside the radwaste facility.

In order to prevent a recurrence of this event, the condensate demineralizer regeneration procedure is being modified to require a positive verification that adequate radwaste tank capacity exists.-

prior to starting a regeneration.

We are enclosing twenty-five copies of this report.

Very truly yours, Ivan R._Finfr k,

. Manager, Nuclear Generating Stations IRF/pk Enclosures cc: Mr. J. P. O'Reilly, Director Regulatory Operations, Region I

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