INTRODUCTION 



Millstone Nuclear Power Station (MNPS) is located on the north 

 shore of Long Island Sound (LIS) in Waterford, Connecticut. The station 

 consists of three units located on a peninsula bounded by Jordan Cove on 

 the east and by Niantic Bay on the west (Fig. 1). Millstone Unit 1, 

 which commenced operation November 29, 1970, is a 652-MWe boiling water 

 reactor (BWR) . Unit 2 is an 870-MWe pressurized water reactor (PWR) 

 that began operating October 17, 1975. Construction of Unit 3, a 

 1,150-MWe PWR, began in August 1974; commercial operation is planned for 

 1986. 



250 



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meters 



Discharge 

 «r Canals 

 ic Hsh 

 Barriers 



Niantic Bay 

 Figure 1. Site-plan of the Millstone Nuclear Power Station. 



All three units use once-through condenser cooling water systems. 

 Cooling water is generally drawn from depths greater than four feet 

 below mean sea level by separate shoreline intakes located along Niantic 

 Bay. The intake structures are typical of shoreline installations 

 having coarse bar racks and traveling screens. The rated circulating 

 flows for Units 1, 2 and 3 are 935, 1,220 and 2,000 cfs, respectively. 



