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About PRIS
SOUTH TEXAS-1
Operational
Reactor Details
Reactor Type
Model
Owner
Operator
PWR
WH 4LP (DRYAMB)
NRG Energy, Inc.
STP Nuclear Operating Co.
Reference Unit Power (Net Capacity)
Design Net Capacity
Gross Capacity
Thermal Capacity
1280
MW
e
1250
MW
e
1354
MW
e
3853
MW
t
Construction Start Date
First Criticality Date
22 Dec, 1975
08 Mar, 1988
First Grid Connection
Commercial Operation Date
30 Mar, 1988
25 Aug, 1988
LifeTime Performance
Electricity Supplied
Energy Availability Factor
Operation Factor
Energy Unavailability Factor
Load Factor
336.52 TW.h
85.2 %
85.0 %
14.8 %
85.8 %
Lifetime performance calculated up to year
2023
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
1988
2791.490
1250
2404
79.6
80.0
80.0
74.9
74.9
1989
6307.670
1250
5524
63.1
63.1
67.3
57.6
61.9
1990
6072.870
1251
5198
59.3
59.4
63.9
55.4
59.1
1991
7239.780
1251
6069
69.3
69.3
65.5
66.1
61.2
1992
7265.140
1251
6033
68.7
68.7
66.3
66.1
62.4
1993
666.030
1251
676
7.7
7.7
55.3
6.1
51.8
1994
8251.410
1251
6842
78.1
78.2
58.9
75.3
55.5
1995
9301.770
1251
7570
86.4
86.5
62.7
84.9
59.5
1996
10226.800
1251
8213
93.5
93.5
66.4
93.1
63.6
1997
9873.230
1251
8019
91.5
91.6
69.1
90.1
66.4
1998
10859.940
1250
8739
99.8
99.8
72.0
99.1
69.6
1999
9645.370
1250
7857
89.7
89.7
73.6
88.1
71.2
2000
8591.900
1250
6905
78.6
78.6
74.0
78.2
71.8
2001
10338.160
1250
8240
94.1
94.1
75.5
94.4
73.5
2002
10867.940
1250
8573
97.9
97.8
77.1
99.0
75.2
2003
6858.780
1250
5433
62.0
62.3
76.1
62.6
74.4
2004
11103.580
1250
8712
99.2
99.2
77.5
101.1
76.1
2005
9901.850
1280
7845
89.5
89.6
78.2
88.3
76.8
2006
10144.550
1280
7942
90.7
90.7
78.9
90.5
77.5
2007
11804.800
1280
8760
100.0
100.0
80.0
105.3
79.0
2008
10800.560
1280
8108
92.3
92.3
80.6
96.1
79.9
2009
10052.230
1280
7582
86.6
86.6
80.9
89.6
80.3
2010
11304.110
1280
8588
98.0
98.0
81.7
100.8
81.3
2011
10616.200
1280
7909
90.3
90.5
82.1
94.7
81.8
2012
10520.660
1280
7891
89.8
89.8
82.4
93.6
82.3
2013
11019.470
1280
8247
94.1
94.1
82.9
98.3
83.0
2014
9075.070
1280
6894
78.7
78.7
82.7
80.9
82.9
2015
9331.900
1280
7140
81.5
81.5
82.7
83.2
82.9
2016
11288.140
1280
8599
97.9
97.9
83.2
100.4
83.5
2017
10109.920
1280
7715
88.1
88.1
83.4
90.2
83.8
2018
10306.360
1280
7881
90.0
90.2
83.6
91.9
84.0
2019
11515.330
1280
8760
100.0
100.0
84.2
102.7
84.6
2020
10409.820
1280
7965
90.7
90.7
84.4
92.6
84.9
2021
10097.710
1280
7915
90.4
90.4
84.5
90.1
85.0
2022
11593.440
1280
8760
100.0
100.0
85.0
103.4
85.6
2023
10372.140
1280
7932
90.6
90.7
85.2
92.5
85.8
Performance indicators are calculated from the Commercial Operation Date.
Above data generated by the PRIS database. Last update on 2025-02-15
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HATCH-1
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HOPE CREEK-1
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INDIAN POINT-1
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KEWAUNEE
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LASALLE-1
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LIMERICK-1
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MAINE YANKEE
MCGUIRE-1
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NINE MILE POINT-1
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NORTH ANNA-1
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OCONEE-1
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OCONEE-3
OYSTER CREEK
PALISADES
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PERRY-1
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PRAIRIE ISLAND-1
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QUAD CITIES-1
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RANCHO SECO-1
RIVER BEND-1
ROBINSON-2
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SAN ONOFRE-3
SAXTON
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SHIPPINGPORT
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SUMMER-1
SURRY-1
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SUSQUEHANNA-1
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THREE MILE ISLAND-1
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TROJAN
TURKEY POINT-3
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VERMONT YANKEE
VOGTLE-1
VOGTLE-2
VOGTLE-3
VOGTLE-4
WATERFORD-3
WATTS BAR-1
WATTS BAR-2
WOLF CREEK
YANKEE NPS
ZION-1
ZION-2