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Impact Probability Estimates

O'Canna, Myra L.

A memo and table. The latter gave estimates of probabilities of the SNAP 19 impacting cities of the world. The impact probabilities given reentry from a polar orbit were generalized and can be applied to any object reentering from a polar orbit.

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U.S. Department of Energy physical protection upgrades at the Latvian Academy of Sciences Nuclear Research Center, Latvia

Soo Hoo, Mark S.

Approximately five years ago, the Safe, Secure Dismantlement program was started between the United States and countries of the Former Soviet Union (FSU). The purpose of the program is to accelerate progress toward reducing the risk of nuclear weapons proliferation, including such threats as theft, diversion, and unauthorized possession of nuclear materials. This would be accomplished by strengthening the material protection, control, and accounting systems within the FSU countries. This paper describes: the process involved, from initial contacting to project completion, for the physical protection upgrades now in place at the LNRC; the intervening activities; and a brief overview of the technical aspects of the upgrades.

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Rotating electric field sensor for nondestructive evaluation of nonmetallic engineered components

Novak, J.L.

Improvements in performance of products with nonmetallic engineered materials are obtained at the cost of increased complexity of product design, manufacture, and maintenance. NDE (nondestructive evaluation) techniques have been developed for verifying design models, identifying manufacturing flaws, and assessing service-related damage. This project involved developing a new NDE method that provides additional information; the sensor measures changes in an imposed electric field to obtain electrical impedance images of a component. Effective sensing volume and orientation of imposed electric field may be varied to optimize field interaction with the internal structure of a part. These interactions are combined into multidimensional impedance images that reflect variations in the mechanical geometry and internal structure of a part. Location of an impedance anomaly may be correlated with the location of a flaw.

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Results 99176–99200 of 99,299
Results 99176–99200 of 99,299