Radiological Implications Concerning the Use of Argon as the Core Cover Gas in Sodium Graphite Reactors Page: 2 of 9
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WRITTEN BY TDR NO.
H S. Hart ATOMICS INTERNATIONAL 5817
S odium Reactors A Division of North American Aviation, Inc.
__ __ __Engineering G 7519
UtTReactor TECHNICAL DATA RECORD .EDGER ACCT. 621
S 0R :PROGRAM Advanced Sodium Cooled SUB-ACCT.
Reactor Program TWR
PROJECT Sodium Cooled Reactor DATE October 24, 1960
o Resign and Evaluation PAGE 1 8
703 K. W. Foster*
COPIES TO: R. L. Ashley* R. W. Dickinson B. E. Harper*
R. J. Beeley* F. L. Fillmore R. B. Hinze*
S. Berger* L. E. Glasgow4 A. A. Jarrett
W. P. Corcoran* J. P. Hale*' J. E. Mahlmeister*
SUBJECT- Radiological Implications Concerning the Use of Argon as the Core
Cover Gas in Sodium Graphite Reactors
I STATEMENT OF PROBLEM ... . . . . . . . . . . . . . . . . . . . PAGE I
I1 SIM4ARY OF RESULTS AND RECOMMENDATIONS . . . . . . . . . . . . . PAGE
II METHOD USED, DESCRIPTION OF EQUIPMENT, SAMPLE CALCULATIOS . . . PAGE
IV REFERENCES AND APPENDICES . . . . . . . . . . . . . . . . . . . PAGE
I STATEMENT OF PROBLEM
The substitution of argon for helium as the inert core cover gas in
sodium graphite reactors would result in an economic advantage in most
areas of the world. The major objection usually raised to such a proposal
is related to the induced argon radioactivity that would occur in the cover
gas system. The purpose of this report is to; (1) calculate the actual
amount of extra radioactivity which would occur, and (2) evaluate the
radiological significance of this activity with reference to existing design
and operating characteristics of sodium graphite reactors.
II( SUMMARY OF RESULTS AND RECOMMENDATIONS
Using HNPF parameters as a reference model,(4)(5) the levels of argon
radioactivity in the cover gas were calculated as:
A41 - (T? - 110 min.) - 3.2 x 10-2 ,.c/cc
A37 - (Tz - 34.1 days) - 1.2 x 10-3,o/cc
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Hart, R. S. Radiological Implications Concerning the Use of Argon as the Core Cover Gas in Sodium Graphite Reactors, report, October 24, 1960; Canoga Park, California. (digital.library.unt.edu/ark:/67531/metadc868002/m1/2/: accessed May 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.