Accomplishes continuous or a periodic trans-
Air Entrainment System:
fer of air (gas) between the atmosphere
and the facility; abbreviated AES.
Prevents entry of airblast overpressure into
Combined transattack and postattack time
frames in which the facility must fulfill its
Equipment attached directly to its supports
without the use of shock isolation.
A medium used to absorb the waste heat re-
j e c t e d by power generation or air-
conditioning systems. Ice or water in cav-
ities is generally used for hardened
F a c i l i t y hardened to hundreds of psi
Moderately Hardened Fa-
Facility hardened to tens of psi overpressure.
Nominally Hardened Facili-
The timeframe beginning after the last burst.
The time frame prior to first burst or to
Percent of time during a given preattack peri-
the component is in a fully operable or
committable state at the start of the at-
tack or button-up, when the attack occurs
at an unknown (random) point in time.
Primary mission of the system to which the
facility is a subsidiary element.
Displacement envelope of a shock-isolated
equipment or structure.
Facility hardened to thousands (and greater)
of psi overpressure.
tem/component failure-mode will physi-
cally survive a nuclear-weapon attack and
retain its physical integrity during the
specified endurance period.
The time frame between the first burst (or
button-up) and the last burst.
Uninterruptible power supply.