U.S. Nuclear Reactors is an iPhoneŽ/iPadŽ app that shows your current location or a location you specify, reactors in the continental United States and approximate distances to those reactors.  There are 5 main screens (described and shown below):

Reactor Maps Current or found location, reactors in the selected area and names/distances to the closest 4 reactors.
Distances Names and distances of the closest 52 (iPhone) or 70 (iPad) reactors.
Find Finds the nearest reactors to locations you specify.
Info Basic information on the app.
Settings View and adjust app settings.

The app shows nuclear power reactors (yellow) and/or nuclear R&D reactors (cyan) based on app settings.

All information was obtained from the Nuclear Regulatory Commission ( Thank you NRC.

The current version is available in the App Store (here) for $0.99. The app requires IOS 10.0 or later and an active WiFi or cellular services (preferably both) that allow secure connections to the Internet. Some public WiFi networks do not allow secure connections. In this case, you can turn off WiFi and use a cellular network (if you have cellular services).


Shows reactors near the current or found location, reactors in that state, reactors in that region of the country and reactors in the United States.
Allows zooming into the closest 4 reactors (like Diablo Canyon below). Tapping a reactor will show its name.

United States
Region of United States
Current Location
Zoom into Diablo Canyon
San Francisco


Distances shows distances to closest 52 (iPhone) or 70 (iPad) reactors. Power reactors are shown in yellow; R&D reactors are shown in cyan.
Find allows search for specific locations.
Info shows basic app information.
Settings shows and adjusts app settings.

San Francisco
San Francisco
San Francisco
San Francisco

A few settings require explanation:
  - "Describe Selected Plant" controls whether or not a plant name is displayed when you select one of the 4 closest plants.
  - "Describe Found Location" controls whether or not a location name is displayed when you use the Find function.
  - "Update Map Region" controls when the map region is updated when the app receives location updates.
        - The "Auto" setting updates the map region when a location or distance update justifies a screen update.
        - The "Manual" setting doesn't update the map region. It's good for manually zooming into areas of the map.


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