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About PRIS
SAN ONOFRE-1
Permanent Shutdown
Reactor Details
Reactor Type
Model
Owner
Operator
PWR
PWR
SOUTHERN CALIFORNIA EDISON Co.
SOUTHERN CALIFORNIA EDISON Co.
Reference Unit Power (Net Capacity)
Design Net Capacity
Gross Capacity
Thermal Capacity
436
MW
e
436
MW
e
456
MW
e
1347
MW
t
Construction Start Date
First Criticality Date
01 May, 1964
14 Jun, 1967
First Grid Connection
Commercial Operation Date
16 Jul, 1967
01 Jan, 1968
Permanent Shutdown Date
30 Nov, 1992
LifeTime Performance
Electricity Supplied
Energy Availability Factor
Operation Factor
Energy Unavailability Factor
Load Factor
51.13 TW.h
59.8 %
55.1 %
40.2 %
53.2 %
Lifetime performance calculated up to year
1992
Operating History
Year
Electricity Supplied
[GW.h]
Reference Unit Power
[MW]
Annual Time On Line
[h]
Operation Factor
[%]
Energy Availability Factor
[%]
Load Factor
[%]
Annual
Cumulative
Annual
Cumulative
1967
Data from a trial operation not provided
1968
Data Not Provided
1969
"
1970
3207.000
450
0
0.0
100.0
NC
81.4
NC
1971
3468.000
450
8186
93.4
100.0
100.0
88.0
84.7
1972
2965.000
450
6799
77.4
100.0
100.0
75.0
81.4
1973
2275.400
430
5503
62.8
60.4
90.4
60.4
76.4
1974
3145.100
430
7541
86.1
84.6
89.3
83.5
77.8
1975
3245.100
430
7657
87.4
86.2
88.8
86.2
79.1
1976
2476.600
430
6160
70.1
65.6
85.5
65.6
77.2
1977
2338.800
435
5584
63.7
61.3
82.5
61.4
75.2
1978
2680.400
436
7021
80.2
70.2
81.2
70.2
74.7
1979
3355.500
436
7904
90.2
87.9
81.8
87.9
76.0
1980
816.500
436
1960
22.3
22.8
76.5
21.3
71.0
1981
778.700
436
2334
26.6
26.6
72.3
20.4
66.8
1982
510.200
436
1372
15.7
15.7
68.0
13.4
62.7
1983
0.000
436
0
0.0
0.0
63.2
0.0
58.3
1984
278.520
436
822
9.4
9.4
59.6
7.3
54.9
1985
2459.630
436
6728
76.8
76.8
60.6
64.4
55.5
1986
881.490
436
2729
31.2
31.2
58.9
23.1
53.6
1987
2710.820
436
7321
83.6
83.6
60.3
71.0
54.5
1988
1384.400
436
3803
43.3
43.3
59.4
36.2
53.6
1989
1179.700
436
3446
39.3
39.4
58.4
30.9
52.4
1990
1561.620
436
4145
47.3
47.3
57.9
40.9
51.9
1991
2027.400
436
5660
64.6
64.6
58.2
53.1
51.9
1992
2925.880
436
8021
99.8
99.8
59.8
83.5
53.2
Performance indicators are calculated from the Commercial Operation Date.
NC – cumulative values not calculated when more than 50% of required data is missing in PRIS
Above data generated by the PRIS database. Last update on 2025-01-25
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