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Introduction to RF Radiation Safety / 10 / 10.8

10.8 CONTROLLED AREAS AND EXCLUSION ZONES

Controlling access is a practical way to prevent people from entering locations where RF exposure may exceed the limit applicable to them. The boundaries must be derived from the exposure assessment and supported by controls appropriate to the exposure category, source state, and work.

RPS S-1 formally defines a Controlled Area as a place where exposure may reasonably be expected to exceed the general public limits. It also requires the Responsible Person to ensure that occupational limits are not exceeded and to delineate locations above the public and occupational limits. A site may additionally use the term exclusion zone for an area in which entry is prohibited under stated operating conditions.

These terms should not be treated as interchangeable. A Controlled Area can include locations where trained occupational access is permitted, while a site-defined exclusion zone normally marks an area that must not be entered until the source state or other controls make entry safe.

10.8.1 Controlled Areas

Under RPS S-1, a Controlled Area is an area or place in which RF exposure may reasonably be expected to exceed the general public limits. It is managed by a Responsible Person, who must ensure that occupational limits are not exceeded.

Only people provided with information, training, and instruction appropriate to their proposed activity may enter. The Responsible Person coordinates current exposure information, boundary markings, safe working practices, access security, and consultation with source owners, operators, contractors, and others who share duties.

Depending on the assessment, Controlled Areas may include parts of:

The boundary and entry conditions should be clearly marked, and the name and contact details of the Responsible Person should be readily available to anyone seeking access.