FRANKFURT/BERLIN, Sept 15 (Reuters) - German economy minister Sigmar Gabriel refuted media reports of a provisioning shortfall of up to 30 billion euros ($34 billion) in nuclear exit costs, speaking of "irresponsible speculation," that sent shares in the nuclear plant operators tumbling.
Spiegel Online reported a potential shortfall in provisioning for nuclear waste storage late on Monday, citing the findings of a law firm appointed by the economy ministry.