The definition of radiation is energy moving through space. Although non-ionizing radiation is necessary for life, excessive exposure can harm tissue. Ionizing radiation can ionize atoms with enough energy to cause tissue damage by destabilizing molecules inside of cells.

Specific OSHA standards for general industry, maritime, and construction address ionizing radiation. OSHA’s Ionizing Radiation standards protect workers in:

• General industry (29 CFR 1910.1096).
• Construction (29 CFR 1926.53).
• Shipyard employment (29 CFR 1915.57 and, to the extent it applies, 29 CFR 1910.1096).
• Marine terminals (29 CFR 1910.1096, to the extent it applies).
• Longshoring (29 CFR 1910.1096, to the extent it applies).