The approval gives a filip to the European nuclear industry, which has been plagued by huge costs and safety concerns following the Fukushima nuclear disaster in 2011.
French nuclear firm Électricité de France (EDF) plans to develop two reactors at £16bn Hinkley Point in southwest England.
EDF said the EU’s decision is "another positive step forward" for the project.
The UK government can now provide to EDF and its partners a guaranteed power price of £92.50 for each megawatt hour, which is almost double the existing wholesale electricity price.
The guranteed power price is valid for 35 years once the first reactor goes on line.
Power consumers would ultimately have to pay for the guaranteed price, but the UK still had to secure the EU approval under "state aid" rules, considering that this plan favors one technology over another, which may impact competition, reports The Wall Street Journal.
Following revision, the UK’s power plant plan complies with the EU rules on state support; however, the European Commission has not revelaed any any details of the deal.
The official approval for the plan is likely to come by the end of October.
