ML19344E096

Forwards LER 80-025/04T-0

ML19344E096
Person / Time
Site:	Cooper
Issue date:	07/25/1980
From:	Lessor L NEBRASKA PUBLIC POWER DISTRICT
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19344E097	List: ML19344E096 ML19344E100
References
CNSS800459, NUDOCS 8008260621
Download: ML19344E096 (2)

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CNSS800459 July 25, 1980 Mr. Karl V. Seyfrit, Director U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region IV 611 Ryan Plaza Drive 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. It discusses an environmental ev'ent that occurred on July 16, 1980 and was discussed with Mr. D. Hunnicutt on July 17, 1980.

Report No.: 50-298-80-25 Report Date: July 25, 1980 Occurrence Date: July 16, 1980 Facility: Cooper Nuclear Station Brownville, Nebraska 6832:

At approximately 5:00 P.M. on July 16, 1980, the condenser cooling water 0

discharge temperature exceeded the 103 F limit prescribed in Environ-mental Technical Specification 2.1.2. Due to the extremely hot weather, a need for emergency power existed and in accordance with the Environ-mental Technical Specifications, the limit was exceeded for about 7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br />. The condition was terminated as the river temperature decreased below 85 F. The maximum temperature reached was 103.5 F.

During the event, the river temperature was at the normal maximum temp-erature of 85 F as described in the Environmental Technical Specifi-cations. The limit of 103 F is based on the normal maximum river temp-erature and the normal condenser temperature rise of 18 F at 100% power.

Since the Spring 1980 Outage, when 12 rows of low pressure turbine blades were removed, the cooling water temperature rise across the condenser is greater than 18 F at 100% power.

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Mr. Karl V. Seyfrit July 25, 1980 Page 2.

This event presented no adverse consequences from the standpoint of public health and safety. The NRC is in the process of reviewing the District's Technical Specification Change Request of July 16, 1980 which

. requests deletion of this Technical Specification. The Nebraska Depart-ment of Environmental Control was also informed of this event.

Sincerely,

. I-

• L. C. Lessor Station Superintendent Cooper Nuclear Station LCL:PJB:cg l

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