05000280/LER-1979-045-01, /01T-0:on 791228,discovered That Removal of Closed Loop Sys hi-hi Signal from Control Circuit of Safeguards Area Exhaust Ventilation Dampers Would Prevent Air Flow Through Filters.Caused by Improper Design

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• 05000280/LER-1979-045-01, Air Would Not Flow Through Filters If Consequence Limiting Safeguards hi-hi Signal Removed from Control Circuit of Safeguards Area Exhaust Ventilation Dampers.Caused by Design Deficiency