Assessment of the thermal effects on striped bass larvae entrained in the heated discharge of the Indian Point Generating Facilities Units 2 and 3

Technical Report · Fri Jun 01 04:00:00 EDT 1979

OSTI ID:6308086

Carter, H H; Wilson, R E; Carroll, G E

In this report the authors have modelled the excess temperature and velocity fields to evaluate thermally induced mortality levels of striped bass post yolk sac larvae entrained in the thermal plume of Indian Point-2 and -3. The model consists of separate near-field and far-field portions which were combined to form a complete-field model by vector addition of the velocity fields and by superposition of the excess temperature fields based on a simple mixing concept. By calcuating and storing velocity and excess temperature fields appropriate to each of 20 different phases of the tide, our complete-field model follows, and calculates the thermal dose experienced by an assumed intial distribution of passive organisms where the receiving water velocities are time varying, such as occurs in a tidal estuary or coastal setting, as well as undirectional. Application of the model to the cooling water system of Indian Point Units 2 and 3 operating at 873 MWe each and an assumed line of striped bass post yolk sac larvae initially distributed laterally across the river surface upstream from the plant resulted in a list of thermal doses experienced by the larvae ordered with respect to maximum temperature. To evaluate the biological response of the organisms to these doses, thermal dose-excess temperature mortality curves for the 10% mortality level and acclimation temperatures of 15, 20, and 23/sup 0/C were constructed for striped bass post yolk sac larvae. Comparison of the maximum calcuated thermal dose experienced by any of the plume entrained organisms with these curves indicates that less than 10% of the larvae entrained in the heated plume from Units 2 and 3 will be killed. The model further suggests that the zone of influence or withdrawal of the intakes is limited to 20 to 30 meters in the lateral direction.

• Research Organization: State Univ. of New York, Stony Brook (USA). Marine Sciences Research Center
• OSTI ID: 6308086
• Report Number(s): NP-5900352; ON: TI85900352
• Country of Publication: United States
• Language: English

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