Nuclear reactions:

There are two other nuclear reactions along with oxygen isotopes are display below.

¹⁸₈O (p, n) ¹⁸₉F (t_1/2 =112 minutes)

¹⁶₈O (p, α) ¹³₇N (t_1/2 =10 minutes)

An ejected alpha particle is indicated through α.  The protons which cause these reactions output from inelastic collisions of fast neutrons along with hydrogen atoms within water molecules.  The radioactivity stages of these isotopes are much lower than the levels of ¹⁶₇N and ¹⁷₇N in during reactor facility operation.  Therefore, during the period from a few minutes to about five hours after reactor shutdown or after erasing a coolant sample from the system, ¹³₇N and ¹⁸₉F are the principal sources of radioactivity within the reactor coolant of most reactor facilities.

¹³₇N→ ¹³₆C +₊₁⁰β

¹⁸₉F→ ¹⁸₈O +₊₁⁰β

The just significant nuclear reaction which occurs along with hydrogen includes deuterium (²₁H) that comprises about 0.015 percent of natural hydrogen.

²₁H (n,γ ) ³₁H (t_1/2 = 12.3 years)

Tritium (³₁H) decays through emission of an extremely weak β particle (0.02 Mev) and no gamma rays. Therefore, tritium is not a radiological hazard unless it enters the body within important amounts. Tritium could enter the body by inhalation or ingestion.  It is also probable to absorb forms of tritium by the skin.