Access to the experimental halls ILL7 and ILL22 has been modified in compliance with their status as designated radiation protection areas: as of 31 March 2008, access to these areas will be controlled. Access control to the experimental halls will be separate from access control to Level C of the reactor building.

The purpose of this note is to describe the procedures for accessing the experimental halls following these changes.

1. Normal access points

There are three normal access points to the experimental halls:

• in ILL4, next to the entrance to Level C of the reactor,
• in the new ILL7‐ILL22 link building,
• in ILL22, on the 'Chartreuse' side of the building.

The access control system is the same as for the reactor:

• When entering the controlled access area: Present your ILL site badge to the card reader to obtain access authorisation and pass through the tripod or full height turnstile.
• When exiting the controlled access area: Monitor yourself by placing your hands and feet in the radiation monitor. Once the absence of contamination is confirmed, present your ILL site badge to the card reader to release and pass through the tripod or full height turnstile. If you wish to remove small items of equipment (including note books, etc…) from the area, use the small object monitor.

2. Special access points

Special access points must be used for bringing equipment (other than small items) in and out of the controlled access area:

• two truck entrances in ILL7 and one truck entrance in ILL22,
• one equipment airlock (‘sas’) in ILL4 for moving equipment (ONLY) between the experimental halls and Level C of the reactor,
• one equipment airlock (‘sas’) in the new ILL7‐ILL22 link building for moving equipment (ONLY) between the experimental halls and the outside.

The use of the truck entrances and the equipment airlocks is described in procedures; information will be posted on notice boards in the vicinity of these access points.

3. Emergency exits

The emergency exits in ILL7, ILL22 and the new ILL7‐ILL22 link building must only be used in case of danger or if an evacuation order is issued.

These exits must be kept shut and clear of obstructions at all times.