MOSCOW, Aug 18 (Reuters) - Block 4 of Russia's Beloyarsknuclear power station in the Urals mountains was switched off onSunday following a "false" response by the safety system, asubsidiary of state nuclear corporation Rosatom said.
It said the block was halted at 09.15 (0415 GMT).
"The stoppage was carried out under a routine algorithm,"Rosenergoatom said in a statement, adding the radiationbackground at the station and surrounding areas was in line withusual levels.
The plant was opened in 1964.
Last month, a Russian nuclear power plant northwest ofMoscow turned off three of its four generating units after atransformer short circuited. They have returned to operationsince.(Reporting by Vladimir Soldatkin; Editing by Mark Potter)