(Corrects amount in proposed gas swap in last paragraph to 20 million cubic metres a day from total 100 million cubic metres)
By Peter Laca
BRATISLAVA, Jan 15 (Reuters) - Slovakia will have to reduce gas supplies to heating plants and cut off big industrial consumers unless Russian natural gas via Ukraine starts flowing again by February, a minister said on Thursday.
Economy Minister Lubomir Jahnatek said Slovakia, one of the countries most affected by the Russian gas supply interruption, could maintain current levels until the end of January from reserves and supplies from alternative sources.
The government also said it was exploring other routes for emergency gas supplies and appealed to European nations to let it draw Russian gas flowing in a pipeline by-passing Ukraine.
Bratislava declared a state of emergency on Jan. 6, five days after Russia cut off gas supplies to Ukraine over a pricing dispute. Gas deliveries to large Slovak clients were reduced, forcing about 1,000 companies to shut down or cut production, including western car makers and steel producers.
Jahnatek said supplies to large industrial consumers will be cut to zero from February if the Russian supplies do not resume. They are now at a level meant to keep equipment such as furnaces running but not to allow production.
Heating for homes and schools has so far been unaffected but Jahnatek said gas supplies to large heating plants would be cut by 20 percent and shipments to smaller plants by 30 percent if the Russian gas did not begin to flow.
"However, supplies to hospitals and other medical institutions will remain unaffected," he told a news conference.
Hungary has said it would supply electricity to Slovakia, its northern neighbour, amid the crisis, and was also ready to provide 1.0-1.5 million cubic metres of gas per day, a fraction of daily consumption. [
]. Slovakia already receives emergency gas supplies from the Czech Republic.Slovakia is totally dependent on Russian gas and transits about 80 percent of Russian supplies flowing to the European Union, equalling about 20 percent of the EU's consumption.
The central European country of 5.4 million has been considering restarting a nuclear power unit decommissioned at the end of last year. A restart -- put off for the time being -- would put Slovakia at odds with EU law.
Slovakian Prime Minister Robert Fico held talks with German utility RWE <RWEG.DE> on Thursday on gas deliveries from the Yamal pipeline taking Russian gas through Belarus and Poland.
"RWE representatives confirmed to us that this is a technicallly feasible product," Fico said. "We only need to ask partners who are drawing gas from Yamal for solidarity, and for providing part of that gas to Slovakia."
Fico said the Yamal alternative was a second option for emergency supplies, as Slovakia focused primarily on a swap operation it had proposed to Ukraine and Russia on Thursday.
Under the swap option, Ukraine would provide Slovakia with 20 million cubic metres of gas a day, and then take the same amount from Russian gas destined for Slovakia. (Reporting by Peter Laca; editing by Philippa Fletcher) (for main story on gas dispute, click on [
])