9-8 When pure ordinary water is passed through a reactor core as a coolant-moderator, it becomes slightly radioactive

Mechanical Engineering Apr 28, 2022

9-8 When pure ordinary water is passed through a reactor core as a coolant-moderator, it becomes slightly radioactive. The most important of the radioactivities is due to the absorption of a neutron by an oxygen- 16 nucleus. This absorption reaction results in a proton and a radioactive nucleus that has a 7.2-s half-life, as products. (a) Identify the nucleus, and (b) calculate the percent radioactivity left in the water 28.8 s after the above reactions.

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