LONDON: Reverse flows of natural gas from Europe to Ukraine to help it handle Russian price increases and supply cuts would be possible within hours once the infrastructure is in place, but the flows could require approval from Russia's Gazprom first.
Ukraine is in emergency talks with the EU on importing gas from the West, pumping gas in the opposite direction to the original design of the pipelines, following a leap in the price Gazprom charges it for supplies.
Relations between Ukraine and Russia have been in crisis since popular protests in Kiev ousted pro-Russian president Viktor Yanukovich in February, after which Russia seized Ukraine's Crimea region and formally annexed it last month.
Slovakia is the EU's best-placed country to pump gas to Ukraine should Russia cut supplies, but reversing flows along any of the four pipelines that take Russian gas to Slovakia via Ukraine would breach the terms of its contracts with state-controlled Gazprom, a spokesman for Slovak pipeline operator Eustream said.
"For a reverse flow, you would have to stop the East-West flow in one of the (four) pipelines and reverse the flow. But you would have to have approval from Gazprom," the spokesman said.
"Gazprom does not agree with this (reverse flows), and thus it's not an option," he added.
Gazprom Chief Executive Alexei Miller raised questions about the legality of reversing gas flows to Ukraine in an interview aired on Russian state television on Saturday.
Gazprom would be able to monitor whether gas is being re-exported to Ukraine because Slovakia would have to build a metering station before reverse flows can start.
Officials from Norway and The Netherlands, other large gas suppliers, have already said they would be unable to supply Ukraine and other European countries with substantial amounts of gas in the event of a Russian supply cut.
An industry source earlier told Reuters that the cost of building the metering station in Slovakia and making some minor technical adjustments was about 20 million euros ($27 million) and would take nine months to complete.
Slovakia is looking at the option of pumping around 10 billion cubic metres (bcm) of gas per year to Ukraine, enough to meet around 18 percent of Ukrainian demand, the Eustream spokesman said.
Eustream said it was working with Ukrainian pipeline operator Ukrtransgas to try to ensure that reverse flows could start by the winter, when demand for gas peaks. It has already built a compressor station to drive gas eastward.
Previous gas crises have disrupted Russian supplies to Ukraine, a major transit route for Russian gas, and interrupted onward flows to Europe.
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