KARPACZ, Poland, Sept 6 (Reuters) - Poland's KGHM signed a memorandum of understanding with Romanian SN Nuclearelectrica for cooperation in the development of Small Modular Reactors (SMR), the Polish copper producer said on Tuesday.

Last year, Romania said last it would partner with U.S. firm NuScale Power to build small nuclear reactors, while KGHM and NuScale signed a deal in February to start deploying small modular reactors in Poland, aiming to have the first one operational by 2029.

(Reporting by Marek Strzelecki; Writing by Anna Wlodarczak-Semczuk; Editing by)