Subject: Why, when uranium is used in nuclear power plants is lead not a by-product?

Hello,
My question is regarding these statements:  "Different radio active elements 
decay at different rates.  For example, it takes 4.5 billion years for the 
particles of radioactive uranium in a material to be tramsformed into the 
element lead."

The question is, why, when radioactive lead is used in a neclear power plant,  
is lead not a by-product?  Also, as an extention to the previous question, why 
is it that when uranium deposits are found on Earth, there are no lead depostits 
found near by?

If you could please answer these two questions, I would be very grateful.  This 
issue has been a major topic with my family, and we would love to have the 
answer.  Thank-you so very much,
S. Shwetz

Re: Why, when uranium is used in nuclear power plants is lead not a by-product?