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Plant Specific Data

San Onofre Unit #3 (1080 MWe)

• Fuel and Cladding
• Fuel Assemblies
• Core Configuration
• Control System
• Primary Coolant
• Coolant Systems
• Turbines
• Vessel and Containment
• Reactor Operations
• Spent Fuel Management

Last Update: 01/97

Fuel and Cladding

Fuel	UO2 pellet
Cladding	Zr-4
Enrichment	Initial: 1.87/2.41 % Reload: 3.97 %
Pellet Height	10 mm
Pellet Diameter	8.3 mm
Clad Thickness	0.641 mm
Pin Height	4663 mm
Pin Outside Diameter	9.8 mm
Maximum Clad Temperature	347 deg C
Maximum Centerline Temperature	1749 deg C

Fuel Assemblies

Number of Rods per Assembly	236
Fuel Rod Pitch	1.286 cm
Total Number of Assemblies	217
Fuel Assembly Pitch	20.78 cm
Geometry	16x16

Core Configuration

Active Core Height	3.81 m
Active Core Diameter	3.45 m
Fuel Inventory	89.5 tHM
Average Core Power Density	94.9 kWt/liter
Peak Core Power Density	251.0 kWt/liter
Average Assembly Discharge Burnup	34800 MWd/tU
Axial Blankets	no
Axially Zoned Fuel	no
Axially Zoned Burnable Poisons	no
Average Linear Fuel Rating	18.40 kW/m
Peak Linear Fuel Rating	45.60 kW/m

Control System

Control Rod Material	B4C/Ag/In/Cd
Control Rod Drive Type	magnetic jack
Number of Coarse Control Rods	49 full
Number of Fine Control Rods	8 part
Number of Safety Rods	42
Number of Rods Containing Burnable Poison	2752
Burnable Poison Material	B4C
Other Control Systems	chemical shim/burnable poison

Primary Coolant

Coolant Material	H2O
Weight in Primary Circuit	309 t
Pressure	158.2 kg/sq cm
Core Inlet Temperature	289 deg C
Core Outlet Temperature	321.6 deg C
Number of Primary Pumps	4
Total Mass Flow	16818 t/h

Coolant Systems

Number of Loops	2
Steam Generator Model/Series	U-tube
Steam Generator Tube Material	Inconel-600
Water Chemistry	Water Chemistry Coordinated Li Hydrogen Injection

Turbines

Number of Turbines1 Turbine Speed1800 rev/min Turbine Rating1181 MWe Stop Valve Pressure83.3 kg/sq cm Stop Valve Temperature278 deg C

Vessel and Containment

Vessel Material	SA 533 B/SA 508
Vessel Shape	cylinder
Height	13.22 m
Inner Diameter	4.81 m
Wall Thickness	219 mm
Clad Thickness	3.18 mm
Containment Type	prestressed concrete/reinforced concrete
Containment Design Pressure	4.22 kg/sq cm

Reactor Operations

Cycle Length	24 months
Normal Planned Outage Length	60 days
Fuel Loading	49.5 tHM/y
Operational Strategy	Low Leakage Fuel Management

Spent Fuel Management

Amount of Spent Fuel in Fuel Pool	710 tHM
Original Capacity of Pool	800 tHM
Pool Capacity Increase Strategy	52.0
Total Increase in Pool Capacity	Reracking Pin Configuration %