For which nuclear power problem do we not yet have a workable solution? a. finding a substitute for uranium once it is used up b. safe disposal of hlrw c. producing steam to turn the turbine that is not radioactive d. controlling the fission reaction

Answer is: b. safe disposal of hlrw.

HLRW is High-level radioactive waste.

Nuclear (radioactive) waste is hazardous to all forms of life and the environment.

Long term storage of radioactive waste is needed. It is important the stabilization of the waste into a form which will neither react nor degrade over many years.

If nuclear waste is wasted in atmosphere or into oceans and lagre lakes, eventually it will come in contact with living organisms.

Nuclear fission is a nuclear reaction or a radioactive decay where nucleus of atom split into smaller ligher nuclei.