CALCULATED TRANSIENT PRESSURES DUE TO IMPULSE AND RAMP PERTURBATIONS TO VENTILATING SYSTEMS IN BUILDINGS 3019, 3026, 3508;AND 4507

摘要

As part of a general hazard review survey conducted by the Chemical Technology Division of its facilities, transient pressures due to impulse and ramp perturbations to the cell ventilating systems of buildings 3019, 3026, and 4607 and the closed glove box system of 3508 were calculated. From the portions of the pressure curves above atmospheric pressure, volumes of gas outleakage were estimated;thus the amount of activity released can be calculated if an estimate of the activity concentration is available.nThe volumes of outleakage for all four ventilating systems were small for reasonable sizes of perturbations. For an impulse perturbation causing an instantaneous rise of + 8.0 in. H2O, the length of time above atmospheric pressure and estimated outleakages for PBFP cells in 3019 are 1.5 sec and 3.1 ft3, respectively;for volatility cell 1 in 3019, 0.33 sec and 0.45 ft3;for cell A in 3026, 2.1 sec and 3.0 ft3;for a glove box in 3508, 0.066 sec and 0.04 ft3;and a cell in 4507, 0.26 sec and 0.03 ft3.