Skip to content
Skip to navigation
Contact Us
IAEA.org
NUCLEUS
World Statistics
Country Statistics
Publications
Glossary
About PRIS
MILLSTONE-1
Permanent Shutdown
Reactor Details
Reactor Type
Model
Owner
Operator
BWR
Dominion Energy
Reference Unit Power (Net Capacity)
Design Net Capacity
Gross Capacity
Thermal Capacity
641
MW
e
660
MW
e
684
MW
e
2011
MW
t
Construction Start Date
First Criticality Date
01 May, 1966
26 Oct, 1970
First Grid Connection
Commercial Operation Date
29 Nov, 1970
01 Mar, 1971
Permanent Shutdown Date
01 Jul, 1998
LifeTime Performance
Electricity Supplied
Energy Availability Factor
Operation Factor
Energy Unavailability Factor
Load Factor
101.37 TW.h
70.8 %
69.2 %
29.2 %
65.1 %
Lifetime performance calculated up to year
1998
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
1970
Data from a trial operation not provided
1971
3747.100
682
6204
77.0
100.0
100.0
69.0
69.0
1972
3307.300
682
5184
59.0
100.0
100.0
55.2
61.5
1973
1877.400
515
3986
45.5
45.4
84.1
41.6
55.7
1974
3604.100
652
6928
79.1
79.2
82.8
63.1
57.7
1975
3897.100
651
6627
75.6
68.3
79.7
68.3
60.0
1976
3757.100
649
6682
76.1
65.8
77.3
65.9
61.0
1977
4820.300
648
7844
89.5
84.9
78.4
84.9
64.5
1978
4654.900
654
7669
87.6
81.3
78.8
81.2
66.7
1979
4224.300
654
6771
77.3
73.7
78.2
73.7
67.5
1980
3394.100
654
6029
68.6
68.8
77.2
59.1
66.6
1981
2528.000
654
4515
51.5
52.6
74.9
44.1
64.5
1982
4080.800
654
6995
79.8
79.6
75.3
71.2
65.1
1983
5354.300
654
8375
95.6
95.7
76.9
93.5
67.4
1984
4325.870
654
6918
78.8
79.2
77.1
75.3
67.9
1985
4588.350
654
7251
82.8
83.1
77.5
80.1
68.8
1986
5247.940
654
8174
93.3
93.5
78.5
91.6
70.2
1987
4379.430
654
6825
77.9
78.4
78.5
76.4
70.6
1988
5535.720
654
8604
98.0
98.0
79.6
96.4
72.0
1989
4641.820
654
7278
83.1
83.4
79.8
81.0
72.5
1990
5094.950
654
7903
90.2
90.4
80.4
88.9
73.4
1991
1776.180
654
2889
33.0
34.3
78.1
31.0
71.3
1992
3619.080
654
5908
67.3
67.9
77.7
63.0
70.9
1993
5273.220
641
8434
96.3
96.3
78.5
92.4
71.9
1994
3292.030
641
5412
61.8
61.8
77.8
58.6
71.3
1995
4349.990
641
6929
79.1
79.1
77.8
77.5
71.6
1996
0.000
641
0
0.0
0.0
74.9
0.0
68.8
1997
0.000
641
0
0.0
0.0
72.1
0.0
66.3
1998
0.000
641
0
0.0
0.0
70.8
0.0
65.1
Performance indicators are calculated from the Commercial Operation Date.
Above data generated by the PRIS database. Last update on 2024-12-04
Previous
(MCGUIRE-2)
(MILLSTONE-2)
Next
UNITED STATES OF AMERICA
ANO-1
ANO-2
BEAVER VALLEY-1
BEAVER VALLEY-2
BIG ROCK POINT
BONUS
BRAIDWOOD-1
BRAIDWOOD-2
BROWNS FERRY-1
BROWNS FERRY-2
BROWNS FERRY-3
BRUNSWICK-1
BRUNSWICK-2
BYRON-1
BYRON-2
CALLAWAY-1
CALVERT CLIFFS-1
CALVERT CLIFFS-2
CATAWBA-1
CATAWBA-2
CLINTON-1
COLUMBIA
COMANCHE PEAK-1
COMANCHE PEAK-2
COOK-1
COOK-2
COOPER
CRYSTAL RIVER-3
CVTR
DAVIS BESSE-1
DIABLO CANYON-1
DIABLO CANYON-2
DRESDEN-1
DRESDEN-2
DRESDEN-3
DUANE ARNOLD-1
ELK RIVER
FARLEY-1
FARLEY-2
FERMI-1
FERMI-2
FITZPATRICK
FORT CALHOUN-1
FORT ST. VRAIN
GE VALLECITOS
GINNA
GRAND GULF-1
HADDAM NECK
HALLAM
HARRIS-1
HATCH-1
HATCH-2
HOPE CREEK-1
HUMBOLDT BAY
INDIAN POINT-1
INDIAN POINT-2
INDIAN POINT-3
KEWAUNEE
LACROSSE
LASALLE-1
LASALLE-2
LIMERICK-1
LIMERICK-2
MAINE YANKEE
MCGUIRE-1
MCGUIRE-2
MILLSTONE-1
MILLSTONE-2
MILLSTONE-3
MONTICELLO
NINE MILE POINT-1
NINE MILE POINT-2
NORTH ANNA-1
NORTH ANNA-2
OCONEE-1
OCONEE-2
OCONEE-3
OYSTER CREEK
PALISADES
PALO VERDE-1
PALO VERDE-2
PALO VERDE-3
PATHFINDER
PEACH BOTTOM-1
PEACH BOTTOM-2
PEACH BOTTOM-3
PERRY-1
PILGRIM-1
PIQUA
POINT BEACH-1
POINT BEACH-2
PRAIRIE ISLAND-1
PRAIRIE ISLAND-2
QUAD CITIES-1
QUAD CITIES-2
RANCHO SECO-1
RIVER BEND-1
ROBINSON-2
SALEM-1
SALEM-2
SAN ONOFRE-1
SAN ONOFRE-2
SAN ONOFRE-3
SAXTON
SEABROOK-1
SEQUOYAH-1
SEQUOYAH-2
SHIPPINGPORT
SHOREHAM
SOUTH TEXAS-1
SOUTH TEXAS-2
ST. LUCIE-1
ST. LUCIE-2
SUMMER-1
SURRY-1
SURRY-2
SUSQUEHANNA-1
SUSQUEHANNA-2
THREE MILE ISLAND-1
THREE MILE ISLAND-2
TROJAN
TURKEY POINT-3
TURKEY POINT-4
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