No Nuclear Subsidy. Really?

The headline for Chris Huhne's ministerial statement published yesterday on nuclear power was, 'No Nuclear Subsidy'. Really? That would be good if true, but the small print says that the UK, 'currently caps operators’ liability at £140m'. Why does the tax-payer have to pick up the bill if something serious goes wrong? I'd expect a wind farm or gas fired power station to be fully insured by the owner, not the tax payer. Why should a nuclear power station be any different?