No abstract available

[en] In the continuation of the research work by BAM and the Commissariat a l'Energie Atomique (CEA), France, a study was made of the increased risk in regard to low-probability accidents, involving small, type B packages. An evaluation was made of the increased risk when small, type B packages are involved with a low-probability accident - one that involves both crush forces and exposure to a hydrocarbon fire. 3 references, 3 figures

No abstract available

[en] The disintegrator is designed especially for the end piece of uranium ore curing reactors. It consists of a shaft and fragmentation elements which are provided with nails on the outer surfaces. The fragmentation elements are attached to the shaft and are shaped as parts of a spherical surface. In the inner space delineated by the fragmentation elements there is at least one transverse support plate in whose centre there is a bore with a diameter bigger than the diameter of the shaft. To the edge of the plate are attached the fragmentation elements by their inner surfaces. The described disintegrator is simple, easily accessible, it disintegrates perfectly the given material, prevents arching and guarantees the required grain size of the material. (M.D.)

[en] The test series described in this paper has shown that the proposed dynamic crush test or the alternate static crush test result in significantly greater packaging deformation than occurs when the regulatory 9 meter drop test is performed on lightweight, low density, Type B packagings. Furthermore, when the test results from the current program are compared with test results from an accident simulating test of a truck/trailer system carrying such lightweight packagings, the proposed dynamic crush test or the alternate static crush test both appear to provide a crush environment similar to that which can be expected in transport accidents, whereas the 9 meter drop test does not appear to simulate this environment. The energy absorbed by the packaging under the proposed dynamic crush test is independent of the packaging mass and can be significantly greater than the energy the packaging must absorb during a 9 meter drop test. The deformations produced in the 310 kN static crush test and the proposed dynamic crush test are very similar, and are generally greater than those experienced in the 9 meter drop test. The outer drum lid of the generic designs opened under these conditions, at times exposing the inner container. Such damage could lead to increased heating of the inner container during the following thermal test prescribed by regulations

[en] This paper has analyzed, in three separate ways, the longitudinal crush load which can be applied to a small hazardous material (RAM) package which is located in a forward cargo position on a standard body or wide-body cargo aircraft. The load analysis was developed using the concept of a cargo load column. The main purpose of the analysis was to more accurately describe the dynamic crush loads which can be applied to a (RAM) package positioned in the cargo aircraft as described above. In fact, one goal of the analysis was to evaluate these longitudinal crush loads and see if they were bounded by reasonable magnitudes of force. An attempt to determine such a bound was made by structural stability arguments concerning the cargo load column and the attendant structural disintegration of cargo aircraft in severe aircraft crashes. Another bounding mechanism was to limit the dynamic effect of aft loaded cargo on a forward loaded hazardous material package by allowing only the aft cargo in the volume of the cargo load column to impinge upon the hazardous material package. Using the LAARC package as an example problem, the stability arguments in combination with the relatively small dimensions of the LAARC design produced longitudinal crush loads even lower than the vertical crush 311 kN (70,000 lbs) forces. The dynamic loads on the cargo load column which did not incorporate stability arguments produced longitudinal crush loads of 939 kN (211,000 lbs) on the LAARC package which are approximately a factor of three larger than the vertical crush forces of 312 kN (70,000 lbs). While the disparate analyses presented cannot yield a definitive upper limit on the longitudinal crush forces that might be experienced by a RAM package in a severe aircraft accident, it is concluded that they do provide a reasonable bound on the problem

[en] Use of synthesis method to devise field emission cathodes (FEC) with specified properties is considered. Examples are given of using the method for solving problems of developing FECs with electron emission localized in a narrow angle and FECs with an increased resistance to ion bombardment. It is shown that using the synthesis method in the development of FECs with specified properties permits to employ more general and indeendent of the experiment conditions physcal parameters to select the cathode material, which enables to consider a broad range of metals and their compounds and to carry out a purposeful search for optimum variants, thus considerably reducing the volume of experimental research

[en] The basic principles of a line technology of extracting firm ores, including break-up of ore by means of subterranean nuclear explosions, the removal of ore from sorting blocks by means of vibrator feeders and transporting it to intermediate levels via a new type of belt conveyor on mobile supports are considered. A method of crushing ore by nuclear explosions on reflecting surfaces is proposed to obtain a more uniform fragmentation of ore, increase the output of fragmented ore per unit capacity, and to preserve mining output. The basic principles of designing a system of mining based on a line technology are formulated and one variant of such a system is presented

[en] Short note

No abstract available