ML19289C399

Forwards LER 78-036/04T-0

ML19289C399
Person / Time
Site:	Cooper
Issue date:	12/15/1978
From:	Lessor L NEBRASKA PUBLIC POWER DISTRICT
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19289C400	List: ML19289C399 ML19289C403
References
NUDOCS 7901120136
Download: ML19289C399 (2)

Text

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I^ ' COOPER NUCLEAR STATtoN Nebras.ka Public Power District "'A"E" !"~lM E"".^Y^ ""

December 15, 1978 Mr. Karl V. Seyfrit, Director U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region IV 611 Ryan Plaza Suite 1000 Arlington, Texas 76011

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 12, 1978. Mr. Blaine Murray was notified of this event on December 14, 1978. A licensee event report form is also enclosed.

Report No.: 50-298-78-36 Report Date: December 15, 1978 Occurrence Date: December 12, 1978 Facility: Cooper Nuclear Station Brownville, Nebraska 68321 At 1420 hours0.0164 days <br />0.394 hours <br />0.00235 weeks <br />5.4031e-4 months <br /> on December 12, 1978 with the reactor at 2381 MWt, it was determined that a discharge of the floor drain sample tank was made without adequate effluent monitoring as required by sections 2.4.1.b.3.a and b of the Cooper Nuclear Station Environmental Technical Specifi-cations. At approximately 1245 hours0.0144 days <br />0.346 hours <br />0.00206 weeks <br />4.737225e-4 months <br /> on December 12, 1978, a discharge of the floor drain sample tank was initiated per Administrative Pro-cedure 2.5.2.3. At approximately 1420 hours0.0164 days <br />0.394 hours <br />0.00235 weeks <br />5.4031e-4 months <br /> on December 12, 1978, it was discovered that the prs iious flush of the radwaste monitor had not been secured, therefore the tank discharge was not being monitored. The discharge was immediately terminated with approximately 63% of the discharge volume remaining in the tank. Another sample was taken and analyzed prior to the discharge of the remaining portion of the tank volume. Since a sample of the tank had been taken and analyzed prior to the initial discharge, and the tank's contents were discharged at a flow rate based on a conservative dilution flow estimate, it was concluded that no radioactive release limits defined in the Cooper Nuclear Station Environmental Technical Specifications were ---anded. The sample taken prior to reestablishing the discharge also contirmed that no radioactive release limits had been exceeded. This event presented no adverse consequences from the standpoint of public health and safety.

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7901120134 N

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b Mr. Karl V. Seyfrit December 15, 1978 Page 2.

The cause of this event has been attributed to personnel error. The procedure was correct and, if followed, the flush water would have been valved of f and proper continuous monitoring would have been provided.

This has been discussed with the person involved with this event.

To preclude repetition of this event, Operations personnel have again been made aware of the necessity of terminating radwaste monitor flushing prior to discharge of liquid radwaste. This environmental event report will be routed to Operations pcrsonnel.

Sincerely, y em L. C. Lessor Station Superintendent Cooper Nuclear Station LCL:cg Attach.