The best places are near the pump, insulation, or check valve that causes the hammer, or at more distant points where the pipe changes direction, for example, at the top of a pump riser. We usually install the water hammer suppressor between the shut-off valve and the incoming water supply line, close to the valve. Or we may need to install a water hammer suppressor in both hot and cold water piping systems.
Radiation showers break the genome and cause a lot of damage simultaneously. This seems to overwhelm the DNA repair mechanism in the cell, leading to the damage we see in the DNA.
You can cure water hammer by turning off the water behind the flooded chamber, opening the offending tap, and allowing the faucet to drain completely. Once all the water is drained from the chamber, the air will refill it and restore the cushion.