Complex sentence: After the construction of the unit started in 2005, Areva has started constructing EPRs in Flamanville, France, and in Taishan, China, and in July 2012, it seemed that the two EPRs being constructed in China would be the first ones to enter service.
Split into simpler sentences: After the construction of the unit started in 2005, Areva has started constructing EPRs in Flamanville, France, and in Taishan, China. In July 2012, it seemed that the two EPRs being constructed in China would be the first ones to enter service.