P208 CEEFAX 208 Wed 3 Feb 21:00/10       A planned test at a nuclear power station in north Wales has been postponed by the Central Electricity Generating BoardN The board said the test at the Trawsfynydd station had been put off because of local concern and the way the test had been misrepresented. The test, scheduled for next week, involved the shutting of a reactor. Moscow has denied reports of a nuclear accident in the Soviet Union. The reports were blamed on test telexes between meteorological organisationsN News index 102/202 Newsreel 119/219