OSLO, March 17 (Reuters) - An outage at Norway's Nyhamna gasplant, which processes gas from Royal Dutch Shell's Ormen Lange field, will cut gas exports by 15 million cubicmetres (mcm) on Tuesday, gas system operator Gassco said onMonday
The outage, caused by a power failure, has already cutexports by 38 mcm on Monday, more than 10 percent of thecountry's usual output, leaving European markets tight as Norwaysupplies about one fifth of the European Union's gas needs.
Gassco expects the outage to last until midnight local timebut the facility usually needs several hours to ramp upproduction. (Reporting by Balazs Koranyi, editing by David Evans)