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CX-006965: Categorical Exclusion Determination

Provide Design to Install a Seismic Switch to Shut Down Both Supply Fans and Both Room Exhaust Fans During a Seismic Event
CX(s) Applied: B2.5
Date: 09/16/2011
Location(s): Aiken, South Carolina
Office(s): Environmental Management, National Energy Technology Laboratory

As a result of the upgrade of the HB-Line Documented Safety Analysis/Technical Safety Requirements to DOE-STD-3009, several events require protection to prevent a radiological release. Consolidated Hazards Analysis Process (CHAP) for the HB-Line Documented Safety Basis Upgrade (U), U-CHA-H-00003, includes two specific events HB-7-001, Earthquake with subsequent fire and post seismic hydrogen explosions in process vessels and HB-7-004, Earthquake with post seismic hydrogen explosions in process vessels requiring protection. In addition to these HB-Line events the H-Canyon CHAP SRNS-TR-2008-00277 events GE-7-003 and GE-7-004 credit the H-canyon exhaust ventilation system (including Canyon, Truckwell, railroad tunnel, and hot and warm crane maintenance areas) (exhausts and filters air from designated ventilated areas).