ML19259D512

Environ Incident 50-289/75-05:on 750802,no Analysis Taken of Suspended & Dissolved River Solids During Discharge of Neutralized Regenerant Waste Tank.Caused by Lack of Procedure Requiring Notification of Sampling

ML19259D512
Person / Time
Site:	Three Mile Island
Issue date:	08/09/1975
From:	Arnold R METROPOLITAN EDISON CO.
To:
References
GQL-1376, NUDOCS 7910240776
Download: ML19259D512 (4)

Text

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• NRC DISi '53UTION FOR PART 50 DOCKET h (TEMPORARY FORM)

CONTROL NO: f822 FILE: bWO LTR TWX RPT OTHER FROM: Metropolitan Edison Co DATE OF DOC DATE REC'D Reading, Pa 8-11-75 XX 8-9-75 w nia XX o r-ORIG CC OTHER SENTIEC PDR TO: XX none signed SENT LOCAL PDR Mr O'Reilly INPUT NO CYS REC'D DOCKET NO:

CLASS UNCLASS PROPINFO 1 50-289 mg ,

ENCLOSURES:

DESCRIPTION:

Ltr reporting abnormal occurrence (ENVIRO)

.s on 8-2-75 concerning a failure to analys for suspended soldis, dissolved solids

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,i POST OFFICE BOX 542 READING, PENNSYLVANI A 19603 TELEPHONE 215 - 929 3601 August 9, 1975 GQL 1376 Mr. J. P. O'Reilly, Director j Office of Inspection v4 Enforcement, Region 1 ,

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U.S. Nuclear Regulatory Commission  ;

631 Park Avenue -

King of Prussia, Pennsylvania 19406 ,

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Dear Mr. O'Reilly:

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Operating License DPR-50 Docket No. 50-289 In accordance with the Environmental Technical Specificftions for Three Mile Island Nuclear Station Unit 1, we are reporting the following Environmental Incident:

(1) Report Number: E.I. 50-289/75-05 (2a) Report Date: August 9,1975 (2b) Occurrence Date: August 2, 1975 (3) Facility: Three Mile Island Nuclear Station Unit 1 (TMI-1)

(4) Identification of Incident:

No analysis for suspended solids, dissolved solids, and pH was made during discharge of a tank of neutralized regenerant wastes, which is a violation of the monitoring requirements of the Environmental Technical Specifications, paragraph 2.2.2 and 2.2.3.

(5) Conditions Prior to Incident:

1459 270 The reactor was at steady-state power with major plant parameters as follows:

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Power: Core: 1007. f - ~ . '

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<,. . J Elec: 860 MW (Gross) f 6 !67 RC Flow: 142 x 10 lb/hr

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vvcv RC Press: 2155 psig ?g u.s. ug - u g/

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RC Temp.: 579 F PRZR Level: 240 in.

PRZR Temp.: 655 F (6) Description of Incident:

Discharge of the Waste Neutralizing Tank was initiated at. 0415 on August 2,1975, in accordance with TMI-1 Operating Procedure 1104-18, Rev. 1. The Chemistry Department was notified of the release and ~

was told to draw a sample approximately two hours af ter commencing the release. Due to the workload near the end of the shif t at 0630, the technician passed this task on to the on-coming shift. The task was not properly transmitted and the samples were subsequently never taken before the release was terminated by the Operations Departnent.

(7) Designation of Apparent Cause of Incident:

The apparent cause of the incident is procedure in that OP 1104-18 requires notification of the Chemistry Department that samples are needed but does not require verification that samples have been taken.

Personnel contributed to the incident in that the requirement to take the sample was not properly transmitted during the shif t turnover.

(8) Analysis of Incident:

The volume of liquid releaned from the waste neutralizing tank during the eleven-hour discharge was calculated to be 32,600 gallons , yielding a release rate of 50 gpm. As the minimum river water dilution flow at that time was 20,000 gpm, there was a dilution factor of 400.

There were no parameters outside the Environmental Technical Specification limits. The pH of the tank water was 7.15, well within the required range of 6 to 9. Suspended solids were 0.0 ppm. With the dilution factor of 400 calculated above, the dissolved solids of 13,525 ppm as measured in the tank would increase the effluent dissolved solids by 34 ppm over river water concentration which normally ranges from 200 to 400 ppm.

Accordingly, there was no threat to the environment.

(9) Corrective Action:

IMI-1 Operating Procedure 1104-18 will be revised to include a documented check that all samples have been drawn at the plant discharge for analysis by the Chemistry Department. In addition, training on the revised procedure and on the importance of complete and reliable turnover of information during shif t relief will be administered to cognizant Chemistry Department personnel.

The Plant Operations Review Committee and Station Superintendent reviewed and approved these actions and the Station Superintendent has taken steps to ensure that they are implemented.

1459 271

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(10) Failure Data:

Not Applicable Sincerely, Signed . . R. C. Arnold R. C. Arnold RCA:RSB:tas cc: Director ~

Division of. Reactor Licensing U. S. Nuclea : Regulatory Coc:lission Washington, J.C. 20555 File 7.7.3.11.1/23.1.1 1459 272