Water Properties

There is no relationship between heavy water and hard water.

From Wiki:

Heavy water is used in certain types of nuclear reactors where it acts as a neutron moderator to slow down neutrons so that they are more likely to react with the fissile uranium-235 than with uranium-238 which captures neutrons without fissioning. The CANDU reactor uses this design. Light water also acts as a moderator but because light water absorbs more neutrons than heavy water, reactors using light water must use low enriched uranium rather than natural uranium, otherwise criticality is impossible.

This message courtesy of the CR4 Help Desk.

Subaru....

By using "heavy water" you can make "heavy steam". (Not many people know this...)

"Heavy steam" can generate much more of an impulse to steam turbine blades, thereby allowing the turbine to be made much smaller.....saving capital expenses.

Don't believe any of that nuclear stuff posted by others.

And, don't....under any terms visit a website called "Wikipedia"....

Dear cronin... Can you explain me " what is heavy waterand heavy steam ?. I didn't heard the term as heavy steam. Then what is the properties of it?"

He's pulling your leg!