A. R. W. WILSON 



amount recommended for use under a particular circumstance at least to 

 tlie smallest of the three maximum quantities of activity for each nucleide 

 determined by the restrictions consequent on the hazards listed above. 



In conclusion, it must again be emphasized that these figures have been 

 developed only as a guide to assist in the initial operation of an establish- 

 ment. They must necessarily be amended in the light of experience and may 

 well prove to be far removed from the limits determined by practice. 



Aly thanks are due to Mr. C. N. Watson-Mimro, Chief Scientist, Australian Atomic 

 Energy Conunission, for permission to publish this paper and to Mr. f. A. D. Stockdale 

 of the Health Physics Division of the Australian Atomic Energy Commission for 

 assistance in carrying out some of the calculations. 



REFERENCES 



iLevy, H. a. Chem. Engng News 24 (1946) 3168 

 2Levy, H. a. Industr. Engng Chem. {Industr.) 41 (1949) 248 

 3 Mackintosh, A. P. Nucleonics 5 (1949) 48 

 ^ToMKiNs, P. C. Industr. Engng Chem. {Industr.) 41 (1949) 239 

 ^ToMKiNS, P. C. and Levy, H. A. Industr. Engng Chem. {Industr.) 41 (1949) 228 

 "Spence, R. Proceedings of the First Conference on the Peaceful Uses of Atomic Energy 1, 

 Geneva, 1955 39 



^DuNSTER, H.J. Med. ill. 8 (1954) 731 

 sDuNSTER, H.J. Atomics 6 (1955) 233 



DISCUSSION 



Dr. Austin: Was the air which was extracted from the glove box filtered in any way? 



Dr. Wilson: Yes, the air coming up the tube is either filtered or, alternatively, 

 discharged up a fairly high stack so that there is a very good dilution. 



151 



