MOSCOW (Reuters) -The Kremlin said on Tuesday that a gas turbine for Nord Stream 1, Russia’s biggest gas pipeline to Europe, had not yet arrived after maintenance in Canada and that a second turbine was showing defects. The European Union has repeatedly accused Russia of resorting to energy blackmail but the Kremlin says shortfalls in supply have been caused by maintenance issues and the impact of Western sanctions. Kremlin spokesman Dmitry Peskov said that the sanctions against Russia had critically complicated the work of Nord Stream 1, which is reducing gas supplies to Europe to just 20% of…