List of orphan source incidents

This is a chronological list of orphan source incidents and accidents.

Metric prefixes are used where appropriate: kilo (k), mega (M), giga (G), tera (T).

Note: As incident reporting has used inconsistent units of measurement, the table below shows conversion factors.

Property non-SI unit SI unit equivalent
Radioactivity 1 Curie (Ci) 37 gigabecquerels (GBq)
Equivalent radiation dose 1 rem 0.01 Sievert (Sv)
Absorbed radiation dose 1 rad 0.01 Gray (Gy)