| • | The electrical driven door of the cyclotron vault consists of a plug type door and a mating frame. |
| • | The door consists of a hollow construction made out of steel plates welded together. |
| • | The door can be poured with concrete in one stage, but we prefer in two stages to prevent any deformation. |
| • | The clear opening is 1000 mm wide and 2000 mm high (on the cyclotron side). |
| • | The door thickness is equal to the wall thickness (normally 1700-2000 mm) |
| • | The door is intended to shield against gamma rays and neutrons. |
| • | Also, a negative pressure of 30 Pascal in relation to the surrounding room can be accomplished. |
| • | The door is guided by rails to insure proper alignment with the doorframe. |
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