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A test arrangement and procedure has been devised for a miniaturized gap test in which the donor is essentially a length of hypodermic needle tubing loaded with an exploslve. The particular size used in the work reported hereln had an explosive column charge diameter of 33 mils. The procedure was used to determine gap sensitivities of several explosives including tetryl, RDX, PETN, HMX, and PBXN-5. Several of the explosives were tested of more than one particle size and loaded at more than one density. Within the group of explosives tested, both particle size and loading density had more affect upon sensitivity, as measured in these tests, than did composition. The coarser materials were found to be both less sensitive and more variable than the fine explosives. The fine explosives were found to become less sensitive as the loading density increased. This trend was apparently reversed for the one coarse explosive (RDX, Class a) for which data was obtained. The test arrangement and procedure is a promising tool for the acquisition of data for the design of fuzes of minimum dimensions.

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Battelle-Northwest is developing a general-purpose data retrieval system. The system is planned to provide almost unrestricted flexibility in application and use, with no limitations on the quantity of data, except those imposed by hardware. This data retrieval system is being programmed in Fortran-V, for batch processing on a Univac-1108. The control, search-and-retrieval, query-input, output, and startup programs have been written in preliminary form, and are in the initial debugging and test stages. Current versions of these programs are presented.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Crawford Martin, regarding a legal question submitted for clarification: Whether penalties for late payment of taxes should be assessed when the check in payment of taxes is dishonored by the drawee bank through no fault of the taxpayer.

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This report describes research, development, support, and test activities in the Sandia Laboratory Aerospace Nuclear Safety Program for May 1968.

The purpose of this report is to describe the work accomplished to date in developing and implementing a computer programmed mathematical model for NSS reliability analysis.

This report describes the correlation study of the ultrasonic shearwave inspection of nozzle coolant-channel brazed shear-joints.

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Some of the things discussed in this report are: (1) Computation--NAL is now obtaining satisfactory service on NYU's 6600 computer via the telephone data link. Until about two weeks ago we were plagued by numerous breakdowns of the computer itself (one lasting about three weeks), and bugs in the NYU programs that control the transmission. Early this month a two month complete rebuilding of the NYU computer was begun. During this period Control Data Corporation is making a new computer at their Manhattan data center available to NYU and to the remote-terminal users. This computer is reasonably reliable, and the most serious bugs have apparently been removed from the transmission system. NAL now has immediate access to the computer for most of the day and turn-around time for jobs with moderate amounts of output is often less than one hour. We have always received excellent service and help from Argonne's Applied Mathematics Division, which has made its two computers, a CDC 3600 and an IBM 360-75, available to us. At present we have a courier service to Argonne making three trips a day, soon to be extended to five. In addition IBM is furnishing very competent personnel to help convert …

Arguments are presented which suggest that PCAC is generally applicable only in theories where the once-integrated commutator of axial currents is a conserved vector current.

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This report is a survey of the historical background and development of electoral college and a compilation of proposals to reform it with pro and con analyses and a selected Bibliography

Progress is reported in these areas: nuclear graphite; fuel development for gas-cooled reactors; HTGR graphite studies; nuclear ceramics; fast-reactor nitrides research; non-destructive testing; metallic fuels; basic swelling studies; ATR gas and water loop operation and maintenance; reactor fuels and materials; fast reactor dosimetry and damage analysis; and irradiation damage to reactor metals.

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This report addresses the comparisons study of RTG and solar powered voyager spacecraft.