siemens - Public Service Commission

June 2007 2-2 0738953 1
limits the combined condenser flow from CR I, 2, and 3 to 1,898 million gallons per day (MGD)
during the period of May 1 through October 3 I , and 1,613.2 MGD during the remainder of the year.
CR 1 and 2
The cooling water intake structures for CR 1 and 2 are located on the north bank of the intake canal.
The design intake flow for CR I and 2 is 638,000 gallons per minutes (gpm), or 919 MGD.
CR3
The cooling water intake structure for CR3 is located approximately 400 ft east of the intake for CR 1
and 2. A chain link fence extends across the entire width of the intake canal upstream of the intakes
for CR I and 2. The fence restricts access to CR3 and collects floating or partially submerged debris.
CR3 has four pump bays and seven traveling screen bays separated from the pump bays by a common
plenum. An eighth traveling screen bay provides service water. Similar to CR 1 and 2, the traveling
screen trays are three meters wide and have 9.5 millimeter (mm) (318 inch) mesh. They are operated
once every eight hours and cleaned by a front spray wash system. The screenwash trough slopes to
the west were material is collected in a sump prior to discharge to the intake canal. The trough
receives combined wash water from all screens.
CR3 operates with four circulating water pumps, eac'h rated 170,000 gpm. The design intake flow for
CR3 is 680,000 gpm or 979 MGD. The three units have a maximum permitted flow of 1,898 MGD
and a total nameplate rating of 1,854.8 MW. Additionally, CR3 has a low flow nuclear services water
pumping capacity of 10,000 to 20,000 gpm, depending on system demand.
Cooling water for CR 1, 2, and 3 is withdrawn by a common intake canal south of the units that
extends into the Gulf of Mexico. The 14-mile-long intake canal is dredged to a depth of
approximately 20 feet (ft) to also accommodate coal barges which unload and dock on the south side
of the canal, just west of the intakes for CR 1 and 2 (Figure 2. I .2-2). The intake canal is defined by
northern and southern dikes. The northern dike continues along the channel for another 5.3 miles.
There are openings in the dikes at irregular intervals to allow north-south boat traffic in the area of
CREC. Movement of water into the canal is tidally influenced; at the mouth of the canal, current
velocities ranged from 0.6 to 2.6 feet per second (fps) when last measured in 1983-1984 (Golder
2005).
PEF-NCR-0066 1