A modified section of an underground communication building was constructed at the Defence Research Establishment, Suffield, and experiments were conducted to determine blast-valve performance, overpressures in the air shaft and downstream plenums, and overpressure damage to air ducts. The air ducts were installed in order to give an indication of the expected damage to air-conditioning equipment which would be caused by overpressure pulses. The experiments were conducted in the PRAIRIE FLAT and DIAL PACK Events. Both experiments employed 500 tons of TNT to produce the blast effects.
Report on Middle North SEries, DIAL PACK and PRAIRIE FLAT events, Projects LN 109 and LN-116.