23.        How often are Responsible Users/Radiation Users                 required to have training on the safe use of radioactive         materials?

a.       Training in the use of radioisotopes is at the discretion of the lab supervisor.

b.       The user must have training prior to using radionuclides/exposure to  radiation and yearly thereafter.

c.       Training is on a biannual basis.

d.       There are no training requirements for the use of radioactive  material.