ML20083R084
| 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: |
| References | |
| NUDOCS 8303310373 | |
| Download: ML20083R084 (2) | |
Text
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p q l O ,q V l h >5 Jersey Central I awer & Light Company u l
l i M ADISoN AVENUE AT PUNCH BOWL RO AD e MORRISTOWN. N.J. 07960 e 539-6111 l
July 11, 1972 r1SN1/
l 1 .g> '~ Oy Mr. A. Giambusso h~O <.~
! Deputy Director for Reactor Projects f ( ,. CJ Directorate of Licensing L.
United States Atomic Energy Commission . ' , ' ' Il[ld3 g g l Washington, D. C. 20545 dp 53.rume: m g,g -
Dear Mr. Giambusso:
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Docket No. 5 -219 @
Subject:
N l Oyster Creek Station
( Outside Radwaste Tank Activity j The purpose of this letter is to report an incident that- ,
l occurredatOysterCreekinwhichtheoutsideradwastetankactivity) ~
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 s of waste neutralizer tanks A and B during regeneration of (
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l l-7 condensate demineralizer. Tank space in the waste neutralizer
! 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 pater from the 1-7 condensate demineralizer. Floor drain sump 1-9 j-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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bY 8303310373 720711
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.Q y 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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