05000298/LER-1981-025, Forwards LER 81-025/04T-0.Detailed Event Analysis Encl

Forwards LER 81-025/04T-0.Detailed Event Analysis Encl

ML20040D919
Person / Time
Site:	Cooper
Issue date:	01/05/1982
From:	Lessor L NEBRASKA PUBLIC POWER DISTRICT
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20040D920	List: 05000298/LER-1981-025, Forwards LER 81-025/04T-0.Detailed Event Analysis Encl 05000298/LER-1981-025-04, /04T-0:on 811224,during Full Power,Discharge Was Made from Floor Drain Sample Tank W/O Adequate Sampling & Analysis of Batch.Caused by Personnel Error.Liquid Discharge Procedures Being Revised.Personnel Reprimanded
References
CNSS82001, NUDOCS 8202020397
Download: ML20040D919 (2)

LER-1981-025, Forwards LER 81-025/04T-0.Detailed Event Analysis Encl

Event date:
Report date:
2981981025R00 - NRC Website

text

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COOPER NUCLEAR ST ATION Nebrasks Public Power District

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CNSS820001 January 5, 1982 03 9

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11 Mr. John T. Collins, Regional Administrator GI q

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U.S. Nuclear Regulatory Commission Region IV 4,. g 72 611 Ryan Plaza Drive Suite 1000

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y Arlington, Texas 76011 ro

Dear Sir:

This report is submitted in accordance with Section 5.4.2.b of the Environmental Technical Specifications for Cooper Nuclear Station and discusses an environmental event that was discovered on December 28, 1981.

Mr. Glen Madsen and Mr. Tom Westerman were notified of this event on December 30, 1981.

At approximately 1337 hours0.0155 days <br />0.371 hours <br />0.00221 weeks <br />5.087285e-4 months <br /> on December 24, 1981, a discharge from the Floor Drain Sample Tank was initiated as per CNS Operations Manual Procedure 2.5.2.3.

On December 28, 1981, it was determined that the sample tank was sampled one half hour before the liquid waste had been completely processed from the Floor Drain Collector Tank to the Floor Drain Sample Tank. As a result, the tank discharge was not properly sampled and analyzed as required by Section 3.4.1.b.2 of CNS Environ-mental Technical Specifications.

Upon investigation of the above event, it was determined that the Floor Drain Sample Tank still contained approximately 2000 gallons of the liquid waste in question.

It was verified by recorder readings in radwaste control that no additional liquid had been added to the tank since terminating the discharge. Thus, the liquid remaining in the sample tank was representative of the liquid discharged. A sample of the remaining volume was taken and analyzed for radioactive content.

The analysis indicated a total of 15.2 MPC's which requires a dilution of at least 15.2:1.

During the discharge, the average discharge rate had been 72.67 gpm with a dilution flow of 280,391 gpm, which provided a dilution rate of 3858:1. This is a factor approximately 253 times more conservative than required. Therefore, it was concluded that no radio-active release limits were exceeded and this occurrence presented no adverse consequences from the standpoint of public health and safety.

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Mr.. John T. Collins January 5, 1982 Page 2.

The cause;of this event has_been attributed to personnel error.

The procedure was correct, and if properly followed, would have prevented

' sampling of the Floor Drain Sample Tank before all the water had been processed into.it.

Verbal reprimands have been given to the persons involved with this event. Although the persons involved in this event clearly-understand the procedures, the procedures _are being revised to improve the clarity and understanding by new personnel. These procedure revisions will be completed within 30 days. This environmental event report will be routed.to all Operations Department personnel.

Sincerely, L. C.-Lessor Station Superintendent Cooper Nuclear Station LCL:cg cc: Director, Division of Reactor Licensing Wastington, D.C.

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