lessons learned from 1999 blayais flood : overview of edf ... - NRC
lessons learned from 1999 blayais flood : overview of edf ... - NRC
lessons learned from 1999 blayais flood : overview of edf ... - NRC
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Protective<br />
measures<br />
Warning based for<br />
predictable hazards,<br />
Procedures adapted to<br />
site vulnerability<br />
(platform submersion submersion, site<br />
isolation, loss <strong>of</strong> the<br />
external power supplies,<br />
heat sink filtration<br />
affected by <strong>flood</strong>ing)<br />
FLOODING PROCEDURES<br />
T0<br />
T0 +12h 12h<br />
T0 + 24h<br />
Stand-by phase<br />
Flooding effects<br />
on NPP’s support<br />
functions and<br />
surroundings<br />
Vigilance phase (early actions)<br />
Early warning phase (site<br />
protection preparedness)<br />
Alert phase ( safe state)<br />
At most sites, sites implementation <strong>of</strong> “<strong>flood</strong>ing” <strong>flood</strong>ing procedures :<br />
Prepare site protection during the warning phases (closure <strong>of</strong><br />
paths/openings through dykes and “watertight area”, tanks filling-up,…)<br />
Bring the plants to safe shutdown state if required<br />
<strong>NRC</strong> – Regulatory Information Conference – 11 March 2010 - Page 12
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