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 MDDC - 1073 
 
 UNITED STATES 
 
 ATOMIC ENERGY COMMISSION 
 
 OAK RIDGE 
 
 TENNESSEE 
 
 THERMAL NEUTRON FLUX IN THE ARGONNE HEAVY -WATER PILE 
 
 by 
 W, H. Zinn 
 
 Argonne National Laboratory 
 
 ^^^^^> 
 
 Published for use within the Atomic Energy Commission. Inquiries for additional copies 
 and any questions regarding reproduction by recipients of this document may be referred 
 to the Documents Distribution Subsection, F>ublication Section, Technical Information 
 Branch, Atomic Energy Commission, P. O. Box E, Oak Ridge, Tennessee. 
 
 Inasmuch as a declassified document may differ materially from the original classified 
 document by reason of deletions necessary to accomplish declassification, this copy does 
 not constitute authority for declassification of classified copies of a similar document 
 which may bear the same title and authors. 
 
 UNiV Or Fl Lie 
 
 Date of Manuscript: March 28, 1947 , — JOt,urjE;\TS dept. 
 
 Document Declassified: June 24, 1947 
 
 This document consists of 1 page. • U.S. DEPOSITORY^ 
 
Digitized by the Internet Arclnive 
 
 in 2011 witln funding from 
 
 University of Florida, George A. Smathers Libraries with support from LYRASIS and the Sloan Foundation 
 
 http://www.archive.org/details/thermalneutronflOOargo 
 
MDDC - 1073 
 
 THERMAL NEUTRON FLUX IN THE ARGONNE HEAVY-WATER PILE 
 
 By W. H, Zlnn 
 
 This pile Is normally operated at a power In the neighborhood of 300 KW. For experi- 
 mental reasons there sometimes are very considerable departures from this value. 
 Irradiation of chemicals and materials is usually carried out either in a thimble centrally 
 located In the pile, or a region in the reflector of the pile near the peripheral boundary. 
 
 The thermal neutron flux in the central thimble is definitely dependent upon what 
 materials are in the thimble. As a general rule, however, this flux is approximately 10^' 
 neutrons/cm^/second. 
 
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