Restricted Access is used when the hall will be open for an extended period of time or a large group will enter to work. To drop the hall to the Restricted Access state, first notify the MCC that you wish to open the hall in the Restricted Access state. The MCC will drop the hall status to Controlled Access and send an ARM to survey the hall. Before anyone can enter the hall, the ARM will carry out a radiation survey and post radiation areas. The hall is placed in Controlled Access during the survey to ensure that no one enters before it has been completed. Upon completion of the survey and posting of radiation areas, the ARM will leave the hall and notify the MCC that they can drop the hall state to Restricted Access. With the hall in the Restricted Access state, anyone with the appropriate training may enter and work. The key- release procedure is not required.
To return the hall to Beam Permit from the Restricted Access state, a full inspection must be carried out. This is begun by setting all equipment to its operating state (following the Hall A checklist) and then clearing all workers out of the hall. Next, a request is made to the MCC to arrange a sweep of the hall and to restore the Beam Permit state. The MCC will send over an ARM and set the hall status to Sweep. The ARM will then sweep the hall, verifying that everyone is out. Following a successful sweep, the MCC can move the hall through the Controlled Access and RF Permit states to the Beam Permit state. While working in the hall you must observe all posted radiation areas. Remember, work inside a radiation area requires that you obtain an approved radiation permit. You must also observe the ``two-man" rule, and pay attention to the alarms.