Twelve Xe-100 units of 80 MW each, in three groups of four, are envisaged if the project reaches a final investment decision, per the companies.
Phasing-in took place at 20% power at 20:41 on October 15, two days later than planned after a fault in non-nuclear voltage measurement circuits.
EDF placed the order in 2019; six further replacement steam generators are under manufacture at MHI's Kobe works for delivery from 2028.
First criticality is targeted for 2027, and the reactor will need 72 to 75 batches of fuel salt to reach it.
The plant at Pątnów would have 1,800 MWe of capacity and be built on the site of an existing coal plant.
The orders cover the CA02, CA03, CA05 and CA20 module scopes for the first AP1000 unit at Lubiatowo-Kopalino.
Fuel loading is targeted within the year, the China News Service reported, with first concrete poured in July 2021 for a 58-month build.
PEJ, wholly owned by the State Treasury, will be investor and coordinator; PGE will handle site analyses and feasibility studies.
The Unit 4 installation finished 25 days ahead of the same milestone in Unit 3, the company said.
The plant at Lubiatowo-Kopalino in Pomerania will comprise three AP1000 reactors.
The reactor is designed for 75 MWt from 19.75 percent HALEU TRISO fuel, with two units planned at the Belledune site.
Awardees must cover at least 20 percent of costs, in cash or in kind, and work with Oak Ridge, Argonne or PNNL.
Unity is the third microreactor to reach initial criticality at Idaho National Laboratory's NRIC, meeting the July 4, 2026 deadline.
Turbine unit foundation construction is due for completion by the end of the year, per Rosatom, allowing installation of the power unit turbine.
At Zhaoyuan, CGN has finished the first concrete pour for unit 2's nuclear island, conventional island and cooling tower.
The campus would produce around 9.6 GW for co-located data centers and more thermal heat for industry, per NPR.
Preferred plan adds 2,100 MW of combined-cycle gas by 2031 and 2,400 MW of battery storage by 2030.