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Unplanned Capability Loss Factor

Includes all reactors that were in commercial operation within 2022 and 2024
Country 2022 2023 2024 2022 - 2024
Number of Reactors UCL
[%]
Number of Reactors UCL
[%]
Number of Reactors UCL
[%]
Number of Reactors UCL
[%]
ARGENTINA 3 21.8 3 1.9 3 2.2 3 8.6
ARMENIA 1 4.2 1 7.4 1 1.1 1 4.2
BELARUS 1 33.9 2 2.2 2 8.6 2 12.9
BELGIUM 7 6.8 6 1.9 5 4.8 7 4.8
BRAZIL 2 4.7 2 4.9 2 2.3 2 4.0
BULGARIA 2 1.1 2 0.0 2 0.0 2 0.4
CANADA 19 2.9 19 1.6 19 4.6 19 3.0
CHINA 53 0.5 55 0.4 56 0.4 56 0.4
CZECH REPUBLIC 6 0.8 6 0.9 6 2.8 6 1.5
FINLAND 4 1.6 5 2.6 5 9.0 5 4.9
FRANCE 56 22.5 56 15.1 56 8.0 56 15.2
GERMANY 3 0.2 3 0.0 3 0.1
HUNGARY 4 2.9 4 1.2 4 1.2 4 1.8
INDIA 18 2.5 19 4.4 20 4.6 20 3.8
IRAN, ISLAMIC REPUBLIC OF 1 0.6 1 0.3 1 2.8 1 1.2
JAPAN 10 1.1 12 1.3 14 1.3 14 1.2
KOREA, REPUBLIC OF 25 2.2 25 2.1 26 2.2 26 2.2
MEXICO 2 7.4 2 1.5 2 2.6 2 3.8
NETHERLANDS, KINGDOM OF THE 1 0.0 1 3.6 1 6.0 1 3.2
PAKISTAN 6 5.6 6 3.3 6 2.7 6 3.8
ROMANIA 2 1.2 2 1.2 2 1.6 2 1.3
RUSSIA 37 1.8 37 3.3 37 2.8 37 2.6
SLOVAKIA 4 0.9 4 0.3 4 3.2 4 1.5
SLOVENIA 1 1.6 1 8.1 1 0.3 1 3.3
SOUTH AFRICA 2 11.3 2 4.8 2 2.2 2 6.1
SPAIN 7 2.3 7 2.3 7 3.6 7 2.7
SWEDEN 6 8.2 6 8.6 6 4.8 6 7.2
SWITZERLAND 4 0.4 4 0.6 4 1.7 4 0.9
UNITED ARAB EMIRATES 2 5.0 3 0.0 4 1.5 4 1.8
UNITED KINGDOM 11 7.9 9 8.0 9 13.1 11 9.6
UNITED STATES OF AMERICA 92 0.7 93 0.4 94 1.4 94 0.8
Total 395 5.6 401 3.9 403 3.2 411 4.2

The following information is included in the totals:

TAIWAN, CHINA 3 0.0 3 0.4 2 1.1 3 0.4


Above data generated by the PRIS database. Last update on 2025-07-18


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