cnnenm EN Met ae mee oe required to process a clearance from the date the clearance request is submitted to AEC until the date the "Q"~clearance is granted. is—sremtes. % It is expected that this time will be reduced since there is a decrease in the backlog of individuals to be cleared. The status as of 15 June of Holmes and Narver personnel clearance is as follows: Number of "P"-approved personnel on overseas payroll Number of "Q"-cleared personnel on overseas payroll Number of "P"-approved personnel in the home office 212 1,074 66 Number of "Q"-cleared personnel in the home officé Vv. 235 TRAINING A. Tumbler-Snapper Training i Operation Tumbler-Snapper which was completed@uring this report period provided excellent training for many of the personnel concerned with Operation Ivy. Many of the ideas and methods and much of the equipment were tested under field conditions. The results are now being evaluated and several revisions of the Ivy program may be attributed to lessons learned at Nevada. These revisions will be discussed in some detail in the Test Programs portion of this install- ment (Sec. VII). The F-84G aircraft participation in cloud sampling missions during Operation Snapper gave first-hand experience for those who will fly cloud penetrations during Operation Ivy. Studies of the dependence of airplane contamination on surface treathent and studies of major sources of background radiation after cloud penetration were made. The results of these studies will be applged to decreasing the background radiation on the F-8kG's on Ivy. The newetype fuelecarrying -17- [o