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Building 94: Pre-Fire Plan

    Response Action:

    1. Make initial assessment of the situation.
    2. If warranted call 911 and report fire.
    3. Evacuate occupants.
    4. Report to assembly point

    Hall B may be entered by the truck ramp, which faces Jefferson Avenue, and by the floor level passageway which connects it with the Counting House and the other two halls.

    Hall B is sandwhiched between Halls A and C, sharing thick concrete walls with both.

    When the hall is complete, its inventory of combustible and hazardous materials will change from experiment to experiment, but it will always contain cryogenic helium and nitrogen service piping. The experimental detectors may include flammable gases. It will be and ODH 0 area once cryogenics are introduced and will be a radiation area once the experimental program begins. The base of the Hall is below grade and below the ground water level.

    Hall B in unoccupied during experiments. When the hall is opened for maintenance, it may be occupied by up to fifty people.

    Hall B is constructed of concrete and steel. It's design is based on water tank technology. The Hall B dome is covered with about four feet of dirt. The Hall is 98 feet in diameter, and the ceiling height at its highest is 64 ft.

    Fire Protection:
    Hall B has a pre-action, dry-pipe sprinkler system which is on the perimeter, about 20 feet above the floor. Hall B has a fire alarm system with two pull stations, and the ceiling is outfitted with thermal detectors. A very early smoke detection apparatus (VESDA) system, which alarms at the Machine Control Center, is located on the perimeterof the hall, about 30 feet above the floor. There is a fire alarm panel in the Counting House and in the Machine Control Center. There are three dry chemical fire extinguishers in the hall during the construction period.

    Loss Potential:
    A study of the worst case senario fire in Hall B indicated that the maximum loss due to an undetected and unsuppressed fire would be about $15M.

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