On August 10, 2012 during an inspection in the Air Intake Tunnel, six 4-inch conduits that carry cabling from yard vaults through the Air Intake Tunnel (
AIT) to the Auxiliary Building (
AB) were inspected for flood seals. This was done by opening the conduit seals bottom drain openings to inspect the condition by boroscope. These seal components are just inside the
AIT from the electrical vaults. During the inspections no sealant could be readily identified. Each conduit from the yard vaults that is not sealed could potentially provide a leak path during flood conditions from the yard vaults to the Auxiliary Building via the electrical conduit. Flood water entering the Auxiliary Building could impact the
decay heat removal function.
This is reportable as an 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> ENS notification under 10CFR50.72(b)(3)(v)(B) and 10CFR50.72(a)(1)(ii) as a condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to remove residual heat.
The licensee notified the NRC Resident Inspector.
