TABLE 1. Chronology of MNPS hydrographic and hydrolhermal studies. 



Year 



Study 



1965 Stone & Webster Engineering Corporation. Thermal eflects analysis for a 1,200 MW plant 



at the Millstone Site. Units 1 and 2 Environmental Report, Docket Nos. 50-245 and 

 50-336, Appendix B, Section III-A. 



1965 Essex Marine Laboratory. Current velocity, temperature and salinity measurement in the 



Millstone Point area. 



1965 U. S. Coast and Geodetic Survey. Study on tidal current data. Units 1 and 2 Environmen- 

 tal Report, Docket Nos. 50-245 and 50-336, Appendix B, Section III-M. 



1966 Bechtel Corporation. Diffusion patterns of the circulating water discharge effluent for the 

 Millstone Project. Units 1 and 2 Environmental Report, Docket Nos. 50-245 and 50-336, 

 Appendix B, Section IH-B. 



1966 Pritchard-Carpenter Consultants. Continuous discharge tracer study, Twotrcc Island Chan- 



nel and Niantic Bay, Long Island Sound. Units 1 and 2 Environmental Report, Docket 

 Nos. 50-245 and 50-336, Appendix B, SecUon III-C. 



1968 - 69 Raytheon Corporation. Millstone survey, study on salinity - temperature profiles. Units 1 



and 2 Environmental Report, Docket Nos. 50-245 and 50-336, Appendix B, Sections II-D 

 and E. 



1970 Pritchard-Carpenter Associates. Tracer study of the circulating water system, Millstone 

 Point Unit 1 and 2 Environmental Report, Docket Nos. 5U-245 and 50-336, Appendix B, 

 Section III-F. 



1971 VAST, Inc. Unit 1 June 1971 Millstone Point temperature survey. Units 1 and 2 Environ- 

 mental Report, Docket Nos. 50-245 and 50-336, Appendix B, Section III-G. 



1971 VAST, Inc. Dye difTusion survey in Twotrcc Island Channel UniUs I and 2 Environmental 

 Report, Docket Nos. 50-245 and 50-336, Appendix B, Section III-J. 



1972 VAST, Inc. Study of an offshore thermal difl'user outfall by dye simulation. Units 1 and 2 

 Environmental Report, Docket Nos. 50-245 and 50-336, Appendix B, Section III-K. 



1972 VAST, Inc. Unit 1 thermal survey. Units I and 2 Environmental Report, Docket Nos. 

 50-245 and 50-336, Appendix B, Section MM. 



1973 - 74 Braincon Corporation. Hydrographic surveys. August-September 1973 and February 1974. 

 1977 Environmental Devices Corporation. Postoperational UniLs 1 and 2, preoperational Unit 3 



hydrothermal survey of the Millstone Nuclear Power Station. Millstone Nuclear Power 

 Station, Unit 3, Environmental Report, Operating License State, Appendix D. 

 1977 Texas Instruments, Inc. Airborne thermal infrared survey. Millstone Point Nuclear Station. 



Millstone Nuclear Power Station, Unit 3, Environmental Report, Operating License State, 

 Appendix D. 



1965 - 1976 



All analysis of the thermal effect of a proposed 

 nuclear power plant, with a capacity of 1,200 

 MWe and a design circulating water flow of 1560 

 cfs (44.2 m /s) and a 20°F (1 TC) rise, was made 

 in May 1965 by Stone & Webster Engineering 

 Corporation. It was assumed that the circulating 

 water would be discharged from the southern end 

 of the quarry into Long Island Sound. The pur- 

 pose of this analysis was to provide a basis for 

 predicting thermal effects that would result from 

 the operation of Millstone Unit 1. 



In 1965, Essex Marine Laboratory obtained 

 field data to serve as a basis for the initial calcu- 

 lations of thermal distribution patterns. Their 

 observations established the existence of strong 

 tidal currents in Twotree Island Channel (see Fig. 

 1 for orientation) and provided information on 

 velocity, temperature, and salinity profiles in the 

 area of the proposed circulating water discharge 

 for Unit 1. These data were supplemented by 

 tidal current measurements made during the same 

 period by the U.S. Coast and Geodetic Survey 

 (now the National Ocean Survey). These mea- 

 surements were made at the following locations: 



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