1. The fission reaction was sustained for hundreds of thousands of years. 2. Fission reaction at the second reactor was started on May 31.3. Minimal " four-pound " experiments are fission reactions aborted in their first moments. 4. "That's equivalent to the slow-fission reaction in an out-of-control nuclear reactor. 5. He said the system shut down the fission reaction , which produces nuclear energy. 6. The high reactivity of fluorine traps most fission reaction byproducts. 7. The project abandoned fusion after concluding that it would require a fission reaction to detonate. 8. This U-238 fission reaction produces most of the energy in a typical two-stage thermonuclear weapon. 9. I don't understand where the original fission reaction starts. 10. The remaining neutrons either are absorbed in non-fission reactions or leave the system without being absorbed.
