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<p>The transmission system's overall reliability is 99.999% and hence flooding does not cause significant issues on the transmission networks.</p><p>Similarly for Distribution Network Operators (DNOs) the loss of supply due to flooding is very small. Less than 0.1% of annual interruptions on the DNO networks are caused by flooding. Specific figures are set out as follows:</p><p><table><thead><tr><td valign="top" /><td valign="top" /><td valign="top">Totalannualdata<br /></td><td valign="top">Perinterruptiondata<br /></td></tr><tr><td valign="top" /><td valign="top">Numberof interruptions caused byflooding<br /></td><td valign="top">Totalnumber of customers affected by thesefaults<br /></td><td valign="top">Totalminutes lost from these faults (across allcustomers)<br /></td><td valign="top">Averagenumber of customersimpacted<br /></td><td valign="top">Averagelength of interruptions(minutes)<br /></td></tr></thead><tbody><tr><td valign="top">2008-09<br /></td><td valign="top">66<br /></td><td valign="top">9,422<br /></td><td valign="top">2,046,784<br /></td><td valign="top">143<br /></td><td valign="top">217<br /></td></tr><tr><td valign="top">2009-10<br /></td><td valign="top">168<br /></td><td valign="top">12,785<br /></td><td valign="top">2,485,180<br /></td><td valign="top">76<br /></td><td valign="top">194<br /></td></tr><tr><td valign="top">2010-11<br /></td><td valign="top">156<br /></td><td valign="top">10,747<br /></td><td valign="top">2,551,441<br /></td><td valign="top">69<br /></td><td valign="top">237<br /></td></tr><tr><td valign="top">2011-12<br /></td><td valign="top">83<br /></td><td valign="top">4,664<br /></td><td valign="top">870,987<br /></td><td valign="top">56<br /></td><td valign="top">187<br /></td></tr><tr><td valign="top">2012-13<br /></td><td valign="top">249<br /></td><td valign="top">30,890<br /></td><td valign="top">6,492,869<br /></td><td valign="top">124<br /></td><td valign="top">210<br /></td></tr></tbody></table></p> |