Document Details
PURL
(202 K)
Title:
Inside Cooling of Square Fuel Elements, I
Author(s):
Chrisney, J. B. [North American Aviation, Inc., Canoga Park, CA (United States). Atomics International Div.]
Document Type:
REPORT
Publication Date:
1952 Mar 24
Declassification Date:
1998 Mar 05
Declassification Status:
Declassified
Document Pages:
6 p.
Accession Number:
none
Document Number(s):
NAA-SR-Memo-258
Originating Research Org.:
North American Aviation, Inc., Canoga Park, CA (United States). Atomics International Div.
OpenNet Entry Date:
2011 Sep 07
OpenNet Modified Date:
2024 Oct 24
Description/Abstract:
Six specific cases of inside cooling of square fuel elements have been considered. For corrosion safety, both maximum temperature rise and minimum velocity of the D2O coolant have been fixed at 30° F and 2 feet per second respectively. A better velocity criterion have involved the Reynolds Number but, since corrosion data are uncertain, the difference in criteria is small. The cooling channel walls have been chosen as 0.109 inches of aluminum where corrosion occurs only on one side and 0.187 inches where corrosion occurs on both sides. Since this is a preliminary study, the square fuel element was considered as a cylinder with an equivalent cross sectional area. The minimum graphite temperature has been maintained at 170° C by an added thermal resistance (He film) on the graphite side of the coolant tubes.