March 19, 2018

Andrew Weston-Dawkes
Director, Office of Classification
US Department of Energy

Dear Dr. Weston-Dawkes:

This is a proposal for declassification pursuant to 10 C.F.R. 1045.20 
regarding information classified under the Atomic Energy Act.

We request the declassification of the amount of the US inventory 
of Highly Enriched Uranium.

As you know, the HEU inventory was last declassified by the Obama 
Administration in 2016, reflecting the total HEU inventory as of 
September 30, 2013.

We are now requesting that this information be updated to the 
present, or at least to a more recent date.

We believe the proposed declassification would provide appropriate 
transparency and would promote security:  As the Obama White House 
stated in 2016 when it declassified the 2013 HEU inventory, "This 
type of information sharing, subject to respective national laws 
and procedures, is an important part of the effort to strengthen 
global nuclear security."

We therefore request that the Department consider declassifying 
this information, as provided in 10 C.F.R. 1045.20.

Thank you for your consideration.

Steven Aftergood
Steven Aftergood
Project on Government Secrecy
Federation of American Scientists
1112  16th  Street NW, Suite 400
Washington, DC  20036

voice: (202)454-4691