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About PRIS
FORT ST. VRAIN
Permanent Shutdown
Reactor Details
Reactor Type
Model
Owner
Operator
HTGR
PUBLIC SERVICE CO. OF COLORADO
Reference Unit Power (Net Capacity)
Design Net Capacity
Gross Capacity
Thermal Capacity
330
MW
e
330
MW
e
342
MW
e
842
MW
t
Construction Start Date
First Criticality Date
01 Sep, 1968
31 Jan, 1974
First Grid Connection
Commercial Operation Date
11 Dec, 1976
01 Jul, 1979
Permanent Shutdown Date
29 Aug, 1989
LifeTime Performance
Electricity Supplied
Energy Availability Factor
Operation Factor
Energy Unavailability Factor
Load Factor
5.42 TW.h
30.6 %
31.1 %
69.4 %
15.2 %
Lifetime performance calculated up to year
1989
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
1976
17.500
330
0
1977
226.100
330
2930
1978
609.200
330
4505
1979
224.800
330
1640
22.2
8.5
8.5
8.5
8.5
1980
675.200
330
4707
53.6
54.0
38.7
23.3
18.3
1981
755.000
330
4210
48.1
48.9
42.8
26.1
21.4
1982
589.300
330
3263
37.2
37.6
41.3
20.4
21.1
1983
760.000
330
4626
52.8
53.2
44.0
26.3
22.3
1984
84.330
330
659
7.5
7.5
37.3
2.9
18.8
1985
0.000
330
0
0.0
0.0
31.6
0.0
15.9
1986
76.070
330
1086
12.4
12.4
29.0
2.6
14.1
1987
187.970
330
2028
23.2
23.2
28.4
6.5
13.2
1988
672.990
330
3486
39.7
39.7
29.5
23.2
14.3
1989
541.290
330
2703
46.4
46.4
30.6
28.1
15.2
Performance indicators are calculated from the Commercial Operation Date.
Above data generated by the PRIS database. Last update on 2025-04-22
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