This report gives methods and results of the 1981 radiation monitoring program at LLL for both radioactive and non-radioactive contamination from gaseous and liquid effluents. Off-site monitoring includes various radionuclides but especially tritium in the ecosystems. (PSB)

A set of first-order differential state equations is developed from taking finite differences of the partial differential equation that describes groundwater flow during a pump-drawdown test. The number of states in the model is a direct function of the number of discrete spatial segments used in the approximate model. This number of states is studied to determine a reasonably low-order model that preserves the accuracy of resulting simulations when compared with an available analytical solution. The resulting reduced-order model is then used in an extended Kalman filter for combined state and parameter estimation. This report summarizes work done in a recent pilot study to demonstrate the feasibility of these techniques in groundwater research and points the way toward other approaches to this problem area now under study.

This paper summarizes several studies of fusion reactors based on the compact torus (CT). A wide variety of reactor configurations can be projected within present understanding of the possible types of CT and their macroscopic stability and confinement properties. Three types of CT are considered here, the field-reversed-configuration having B/sub Toroidal/ = 0, the Spheromak with B/sub T/ not equal to 0, and CT's formed with particle rings. For each type, either fixed or moving-ring possibilities are offered along with pulsed or steady operation. In all cases the CT configuration lends itself to simplified blanket and coil design. In certain, important cases a reactor-scale CT is predicted to produce small unit power (10-100 MW/sub e/) facilitating small-scale pilot plants and eventual modularity.

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This report summarizes progress during year 2 (March 17, 1987--March 11, 1988) on the effects of grain size on the structure and mechanical properties of Ni{sub 3}Al and Ni{sub 3}Si.

This report summarizes progress during year 2 (March 17, 1987--March 11, 1988) on the effects of grain size on the structure and mechanical properties of Ni{sub 3}Al and Ni{sub 3}Si.

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Weekly report of the Texas Agricultural Statistics Service on broiler chick numbers in Texas and compared with other states. It includes compiled statistics across six consecutive weeks, from the week ending January 31 to the week ending March 7, during 1986 and 1987 for broiler eggs set, chicks hatched, and chicks placed.

The basic United States law governing immigration and naturalization is contained in the Immigration and Nationality Act of 1952, as amended (8 U.S.C. 1101 -- et seq.). This report provides questions and answers to explain the way in which the Immigration and Nationality Act as amended through 1981 regulates the entry of aliens for permanent and temporary residence in the United States, and other major provisions of the law. Emphasis is placed on subjects which have been of particular interest to the Congress in recent years. This supersedes CRS Report No. 81-65 EPW.

Monitoring of power systems performance data for Pioneer 10 and Pioneer Saturn spacecrafts continued. Net power output for either system during mid-January of 1981 was 112 watts. Power degradation has, for several years, been stable between 4 and 5 watts per year. Viking 1 Lander data acquisition has been resumed following the conclusion of Saturn encounter activities. Figures show the Mars Lander performance history of Viking 1. These data include both the minimum and maximum data for each of the SOL days plotted to show the range of performance experienced on the Martian surface.