There are a number of sources of information on radiological incidents, accidents, emergencies, or terrorism. Some pertinent links are listed below.
Nuclear Power Plant Emergencies
The U.S. Nuclear Regulatory Commission (NRC) has published a document titled What Do I Do in a Nuclear Emergency?, which is found at http://www.nrc.gov/about-nrc/emerg-preparedness/in-radiological-emerg.html.
Centers for Disease Control and Prevention (CDC) has guidance on Radiation Emergencies found at http://emergency.cdc.gov/radiation/.
CDC's Frequently Asked Questions About Dirty Bombs is found at http://emergency.cdc.gov/radiation/dirtybombs.asp.
NRC also has a background document on Response to Dirty Bombs at http://www.nrc.gov/about-nrc/emerg-preparedness/respond-to-emerg/resp-dirty-bomb.html.
CDC has information about a Radiological Exposure Device at https://emergency.cdc.gov/radiation/pdf.infographic_radiological_exposure_device.pdf.
CDC has information on Sheltering in Place During a Radiation Emergency at http://emergency.cdc.gov/radiation/shelter.asp.
Preparedness - General
FEMA has issued a printed publication titled Are You Ready? A Guide to Citizen Preparedness at https://www.fema.gov/pdf/areyouready_full.pdf.
If you have questions about any of the topics above, you may call the Radiological Health Program at (410) 537-3300 or 1-800-633-6101 ext. 3300.
Effects of Radiation (Nuclear Regulatory Commission)