Fact Sheet

Implosion Device

Implosion Device

Want to dive deeper?

Visit the Education Center

Name: Fat Man Implosion-type bomb
Type: Implosion-type nuclear bomb
Length: 3.3m
Diameter: 1.5m
Weight: 4670kg
Yield: 21-23kt

Sources:
[1] "Nuclear Weapon Design", Federation of American Scientists, 21 October 1998, https://fas.org.
[2] "Final Bomb Design", U.S. Department of Energy – Office of History and Heritage Resources, www.osti.gov.

Stay Informed

Sign up for our newsletter to get the latest on nuclear and biological threats.

Sign Up


The 2023 NTI Nuclear Security Index

Report

The 2023 NTI Nuclear Security Index

“The bottom line is that the countries and areas with the greatest responsibility for protecting the world from a catastrophic act of nuclear terrorism are derelict in their duty,” the 2023 NTI Index reports.



Close

My Resources