United States Nuclear Regulatory Commission - Protecting People and the Environment

Analysis of Ultimate Heat Sink Cooling Ponds (NUREG-0693)

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Publication Information

Manuscript Completed: July 1980
Date Published:
November 1980

Division of Engineering
Office of Nuclear Reactor Regulation
U.S. Nuclear Regulatory Commission
Washington, DC 20555

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A method to analyze the performance of ultimate heat sink cooling ponds is presented. A simple mathematical model of a cooling pond is used to scan weather data to determine the period of the record for which the most adverse pond temperature or rate of evaporation would occur. Once the most adverse conditions have been determined, the peak pond temperature can be calculated. Several simple mathematical models of ponds are described; these could be used to determine peak pond temperature, using the identified meteorological record. Evaporative water loss may be found directly from the scanning by a simple and conservative heat-and-material balance.

Methodology by which short periods of onsite data can be compared with longer offsite records is developed, so that the adequacy of the offsite data for pond performance computations can be established.

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