[en] N-body systems described by a product wavefunction are treated in two ways. On the formal level, linked cluster expansion is presented for the logarithm of the normalization integral J = < Psi/Psi> which is conveniently expressed in a diagrammatic notation. For the special case of translationally invariant systems. A method is given to sum all contributions to l n J constructable from a given set of elementary diagrams. l n J may be used to generate physically observable quantities, as illustrated by an approximate calculation of the structure function S(k) for a liquid. As an application of this formalism, the case is considered where Phi/sub b/ is a Jastrow function (which by itself provides a fairly good description of the liquid ⁴He ground state) and Phi/sub a/ is the paired boson ground state described by Lee, Huang and Yang. Phi/sub a/ depends on a set of parameters [Theta/sub K/]. An expression was derived for the energy of this system within a simple but well-defined approximation and appeal to the variational principle to optimize the set [Theta/sub K/]. Attempts to solve the resulting equations are outlined and the failure to do so is attributed to an inadequacy in the approximation

[en] The material in this NASA TM is to appear as a chapter on Laser Doppler Anemometry (LDA) in the AGARDograph entitled, A Survey of Measurements and Measuring Techniques in Rapidly Distorted Compressible Turbulent Boundary Layers. The application of LDA (specifically, the dual-beam, burst-counter approach) to compressible flows is discussed. Subjects treated include signal processing, particle light scattering and tracking, data reduction and sampling bias, and three-dimensional measurements

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No abstract available

[en] Cesium release, turbidity and airborne potential tests were conducted on 50 grams of TMI-2 core debris materials. The tests were performed on the debris in two stages: (1) undisturbed, without fracturing the debris particles; and (2) disturbed, after crushing the debris particles. Crushing the debris had minimal impact on turbidity. In general, the opacity of both solutions decreased at about the same rate (within a factor of 2). Crushing the debris increased the soluble ¹³⁷Cs concentrations a factor of 4 to 5. Most of the airborne activity occurred near the end of the evaporation process, just prior to dryout. The increase in airborne concentration at this time is two to three orders of magnitude higher than at any other time

[en] Cesium release, turbidity and airborne potential tests were conducted on 50 grams of TMI-2 core debris materials. The tests were performed on the debris in two conditions: on the as-received core debris specimen, and after crushing the debris to alter the particle size distribution. The crushing was intended to simulate the breakup of TMI-2 core material that may occur during reactor defueling. These tests are intended to assist GPU Nuclear in predicting the effect of defueling on the reactor environment

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[en] The Low-Level Waste Data Base Development--EPICOR-II Resin/Liner Investigation Program funded by the US Nuclear Regulatory Commission is investigating the chemical and physical conditions of the synthetic ion exchange resins contained in several EPICOR-II prefilters. Those prefilters were used during cleanup of contaminated water from the Three Mile Island Nuclear Power Station after the March 1979 accident. This paper summarizes results and analyses of the third sampling of resins from prefilters PF-8 and -20. Results are compared with baseline data from tests performed on unirradiated resins supplied by Epicor, Inc. to determine if degradation has occurred due to the high internal radiation dose. Results also are compared with results from tests performed on resins obtained from the first and second samplings of those two prefilters. 17 refs., 4 figs., 4 tabs

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No abstract available