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Name: Renee
Status: student
Grade: 6-8
Location: VA
Country: USA
Date: Winter 2011-2012

I am doing a research project on the integral fast reactor, developed at Argonne. I understand that a big part of the IFR concept is that the reactor's waste is reprocessed. Throughout my research, I have come across the mentioning of "pyroprocessing." Could you explain what pyroprocessing is, and how it works?


Here is an excellent article that explains pyroprocessing of nuclear fuel:

Please refer to paragraph 3.2 of this article to see a description of pyroprocessing.

More credible references can be found by going to and searching on the word "pyroprocessing."

Sincere regards,
Mike Stewart

Dear Renee,

We do not have a general non-technical write-up on pyroprocessing but by searching “nuclear reprocessing” in Wikipedia it gives a general description of the technology and a few links. I have also included an Argonne web-links that may be useful:

A general but more technical paper on pyroprocess development for the IFR is also attached.

I hope these help.

Roger N. Blomquist, PhD
Nuclear Engineering Division
Argonne National Laboratory

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