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Architecture and management of a geological repository - Andra

Architecture and management of a geological repository - Andra

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6 – Overall underground architectureThe geographical layout <strong>of</strong> the air ventilation circuit branches (see Figure 6.4.7 for an example)consists <strong>of</strong> networks <strong>of</strong> parallel drifts for the air intakes. Air exhausts <strong>and</strong> smoke removal areaccomplished through networks <strong>of</strong> air exhaust ductings or air exhaust drifts depending on the spaceavailable in the construction <strong>and</strong> waste package transfer drifts.Figure 6.4.7Ventilation organisation (Example <strong>of</strong> scenario)A preliminary estimation <strong>of</strong> the ventilation needs give an overall flow rate <strong>of</strong> 500 m 3 /s, requiring anelectrical rating on the order <strong>of</strong> 3 MW for the situation represented in Figure 6.4.7 110 .6.4.4.2 Ventilation <strong>of</strong> the B waste <strong>repository</strong> zoneThe figures below show the B waste <strong>repository</strong> zone ventilation system.110 In the case <strong>of</strong> scenario S2, because <strong>of</strong> a much greater intensity <strong>of</strong> work <strong>and</strong> a linear system <strong>of</strong> upper drifts, these values may be increasedto 650 m 3 /s <strong>and</strong> 6 MW, respectively.DOSSIER 2005 ARGILE -ARCHITECTURE AND MANAGEMENT OF A GEOLOGICAL DISPOSAL SYSTEM276/495

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