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Addendum to Production Test 221-T-19 reduction of time cycle in dissolver section
None
Date:
February 9, 1955
Creator:
Schmidt, W. C.
System:
The UNT Digital Library
Review of oxide facilities: 224-U Bldg.
None
Date:
February 9, 1953
Creator:
Rohrmann, C. A. & Ludlow, J. O.
System:
The UNT Digital Library
Chemical, physical and reactivity changes in a full reactor E-N meltdown
This report discusses the events from a chemical standpoint following a total loss of coolant disaster will not be altered in the melting reactor by the introduction of N metal. The interdiffusion of uranium and aluminum will be the dominating reaction, causing the blockage and tying up of the lithium in UAl{sub 3} which does not melt until after the uranium does. Pressure from the swelling UAl{sub 3} will extrude uranium-aluminum and lithium into graphite weep holes and block interfaces. The migration of lithium by vaporization will not became appreciable until well over 2000{degrees}C, well beyond the time when uranium and UAl{sub 3} have melted. The eventual result will be a diffuse distribution of uranium, lithium, and aluminium in the lattice. The E-N pile has a larger excess over required control capacity than the uranium provided the large reactivity poison tied up in the lithium is not lost. Compared to the natural uranium pile, the gain of reactivity on loss of coolant is less and the net temperature coefficient in the dry pile remains negative to higher exposures. Furthermore, permanent pile poisoning during meltdown is accomplished via two mechanisms both lithium and uranium redistribution in the lattice produce large negative …
Date:
February 9, 1959
Creator:
Nilson, R.
System:
The UNT Digital Library
Possible Improvemnets in Cavity Geometry at High Energy End ofMark II.
None
Date:
February 9, 1951
Creator:
Alvarez, L.W.
System:
The UNT Digital Library
A history of startup and operations of the 234-5 facility during the year 1949
It is desired at this time to present in summary form a factual history of the Building 234-5 operations, encompassing not only the immediate pre-start-up period from April to July, 1949, but including the major obstacles encountered in the succeeding interval to the end of 1949. This report is intended to serve not only as a review of 234-5 operations during this period but also as a documentary evidence of the difficulties experienced and the manner in which they impeded the start-up. This report presupposes a certain familiarity with the background of the 234-5 Building. To one unacquainted with the scope of this project, or for those desiring a background review, reference should be made to Document HM-253, ``234-5 Building Program Review``, by D.D. Streid, dated April 22, 1949. It must be realized that any attempt to discuss in detail all the circumstances and difficulties contributing to the start-up period would be disconcerting to the reader, and would very likely be repetitive. Therefore, although it is far from the writer`s intent that a cursory review will suffice, the presentation will be as nearly as practicable, chronological and comparative. For the sake of clarity it will be necessary to present several …
Date:
February 9, 1950
Creator:
Bell, R.S.
System:
The UNT Digital Library
Notes on Quadrupole Focusing
None
Date:
February 9, 1956
Creator:
McMillan, Edwin M.
System:
The UNT Digital Library