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YANKEE NPS
Permanent Shutdown
Reactor Details
Reactor Type
Model
Owner
Operator
PWR
PWR
YANKEE ATOMIC ELECTRIC CO.
YANKEE ATOMIC ELECTRIC CO.
Reference Unit Power (Net Capacity)
Design Net Capacity
Gross Capacity
Thermal Capacity
167
MW
e
175
MW
e
180
MW
e
600
MW
t
Construction Start Date
First Criticality Date
01 Nov, 1957
19 Aug, 1960
First Grid Connection
Commercial Operation Date
10 Nov, 1960
01 Jul, 1961
Permanent Shutdown Date
01 Oct, 1991
LifeTime Performance
Electricity Supplied
Energy Availability Factor
Operation Factor
Energy Unavailability Factor
Load Factor
33.94 TW.h
79.5 %
77.4 %
20.5 %
71.7 %
Lifetime performance calculated up to year
1991
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
1960
Data from a trial operation not provided
1961
Data Not Provided
1962
"
1963
"
1964
"
1965
"
1966
"
1967
"
1968
"
1969
"
1970
1281.000
185
7213
82.3
100.0
NC
79.0
NC
1971
1519.900
185
8522
97.3
100.0
NC
93.8
NC
1972
690.200
185
4712
53.6
100.0
NC
42.5
NC
1973
1046.100
175
6244
71.3
71.3
NC
68.2
NC
1974
911.500
175
6099
69.6
69.7
NC
59.5
NC
1975
1193.400
175
7218
82.4
77.9
NC
77.8
NC
1976
1252.100
175
7886
89.8
81.5
NC
81.4
NC
1977
1025.100
175
6472
73.9
66.9
NC
66.9
NC
1978
1193.500
175
7093
81.0
77.9
83.1
77.8
71.9
1979
1232.200
175
7147
81.6
80.4
82.8
80.4
72.7
1980
291.800
175
1933
22.0
22.1
77.4
19.0
67.9
1981
885.100
175
6516
74.4
74.6
77.2
57.7
67.1
1982
882.200
175
6427
73.4
73.5
76.9
57.6
66.3
1983
1343.100
174
8000
91.3
91.5
77.9
88.1
67.9
1984
1026.160
167
6269
71.4
71.4
77.5
69.9
68.0
1985
1181.670
167
7473
85.3
85.3
78.0
80.8
68.8
1986
1392.720
167
8320
95.0
95.0
78.9
95.2
70.2
1987
1135.610
167
7099
81.0
81.1
79.0
77.6
70.6
1988
1116.890
167
7424
84.5
84.5
79.3
76.1
70.9
1989
1307.100
167
7978
91.1
91.1
79.9
89.4
71.8
1990
826.400
167
5272
60.2
60.2
79.0
56.5
71.1
1991
992.070
167
6288
95.6
95.6
79.5
90.4
71.7
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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