This document contains the Work Plan for the modification of the AI Steam Generator for tests in Large Leak Test Rig. This Work Plan describes the objectives, scope of work, schedule and manpower, end items, and meetings and reports required for the modification.

A joint design and ultrasonic welding schedule capable of making a leak-tight pressure joint in nylon was developed. This will permit the replacement of polystyrene with nylon for cell cases on a nickel--cadmium battery.

Natural communities respond to disruption through a series of changes in plant and animal communities that are broadly predictable. The field-to-forest sere of central Long Island follows the pattern set forth earlier for the Piedmont of North Carolina and for New Jersey. The communities of herbs that occur in the years immediately after abandonment are followed by an Andropogon stage which is replaced before the 20th year by pine forest. The pine is replaced in the next 25 years by oak-pine, which in the normal Course is followed by oak-hickory. With repeated burning the oak-pine stage in various combinations of oaks and pine may be maintained indefinitely. Diversity, measured as number of species per unit land area, increased in this sere through the 3-5th years after abandonment to a maximum, dropped, and rose again in the later forest stages. Exotics were a conspicuous part of the communities of the earlier stages but their importance diminished as succession progressed and their contribution to net production was zero beyond the 20th year. The removal of exotics would probably not have changed the pattern of diversity appreciably. Net primary production increased with succession in this sere with major changes occurring as life-forms of …

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Much of what is presented here is indicative of our national trends in computing. To review and bring in the international scope at the same time, the following points are enumerated: 1. There are but few new ventures in the competition for the high performance end of the computer market. 2. The competition for the middle range of computers is very great internationally. 3. The number and varieties of minicomputers are growing at a phenomenal rate throughout the world. There is no question but that the number of manufacturers and number of systems built will continue to accelerate for some time to come. 4. In all these systems, because of rapid price decreases, memory size will increase. 5. Software is becoming more complex and will continue to do so. Most systems will be based on existing systems. 6. Peripherals will improve in performance at lower cost, but will remain of the same magnetic variety in large measure. 7. Networks are in'' today and probably will remain so for quite some time in the broad sense of the word. Computer utilities are a long way off---if every they materialize. (LMT)

Measurements of the voltage and currcnt that resulted from a quench of a superconducting magnet were studied and a simple computer model of this process was developed. Large layer-tolayer voltages were generated by the quench and methods reducing these were suggested and examined. (auth)

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The Brookhaven Linac Isotope Producer (BLIP) produces neutrons from 200 MeV proton bombardment of a transparent (relative to 200 MeV protons) Be target. Threshold foil dosimetry techniques were utilized to characterize the BLIP neutron spectra which includes neutrons with energies greater than 15 MeV. Some operational characteristics of spallation neutron sources were also determined. The derived BLIP neutron spectrum has a hard component (neutrons between 6 to q2 MeV which peaks at 8 to 9 MeV) and a soft component characteristic of neutron scattering. Between 10 and 30% of the neutrons have energies below 0.25 MeV and less than 0.1% of the neutrons have energy in excess of 15 MeV. The derived neutron flux is 8.0 plus or minus 3 x 10/sup 9/ n/cm/sup 2/ mu C. (auth)

The pipe rupture study is designed to extend the understanding of failure-causing mechanisms and to provide improved capability for evaluating reactor piping systems to minimize the probability of failures. Following a detailed review to determine the effort most needed to improve nuclear system piping (Phase I), analytical and experimental efforts (Phase II) were started in 1965. The recent accomplishments of a broad program in (a) fatigue studies through both bench-scale and large-component tests, (b) at-reactor tests of the effect of primary coolant environment on the fatigue behavior of piping steels, and (c) failure probability study of actual reactor piping systems, are presented. (auth)

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Solutions of the Schrodinger equation with a realistic potential are carried out in detail. To check the methods, a few boundbound, bound-free, and free-free cross sections were calculated and values compared with existing calculations and experimental data. These comparisons, along with a listing of the computer code in its bound-free form, are included. (auth)

This report surveys those areas of plasma physics and controlled thermonuclear research in which computation has made significant contributions. Both fluid and particle models are considered, and applications to specific confinement experiments and plasma theory are discussed. (auth)

The PALLOT code was developed to simplify the assimilation of data relating to effects of nuclear blackout on particular reentry trajectories. This code operates in three modes: azimuth, elevation, and inline, In the azimuth and elevation modes, the PALLOT picture represents a family of trajectories that only vary, respectively, in approach azimuth and impact elevation angle. The incline mode depicts a set of reentry vehicles approaching on the same trajectory through a nuclear environment. The code, written in Fortran IV, was developed on the CDC 7600 computer; it will run on the CDC 6600 without modification although the run times may be excessively long. (auth)

The lymph node clearance of /sup 239/Pu O/sub 2/ administered as insoluble particles from subcutaneous implants was studied in adult beagles to simulate accidental contamination of hand wounds. External scintillation data were collected from the popliteal lymph nodes of each dog after 9.2 to 39.4 mu Ci of plutonium oxide was subcutaneously implanted into the left or right hind paws. The left hind paw was armputated 4 weeks after implantation to prevent continued deposition of plutonium oxide particles in the left popliteal lymph node. Groups of 3 dogs were sacrificed 4, 8, 16, and 32 weeks after plutonium implantation for histopathologic, electron microscopic, and radiochemical analysis of regional lymph nodes. An additional group of dogs received treatment with the chelating agent diethyenetriaminepentaacetic acid (DTPA). Plutonium rapidly accumulated in the popliteal lymph nodes after subcutaneous injection into the hind paw, and 1 to 10% of the implant dose was present in the popliteal lymph nodes at the time of necropsy. Histopathologic changes in the popliteal lymph nodes with plutonium particles were characterized primarily by reticular cell hyperplasia, increased numbers of macrophages, necrosis, and fibroplasia. Eventually, the plutonium particles became sequestered by scar tissue that often replaced the entire architecture of the …

It is shown that careful consideration of /sup 32/P//sup 7/Be ratios (both isotopes being generated in the atmosphere by cosmic radiation) not only yields information on the stratospheric or tropospheric origin of air masses. These ratios may also be used to determine the residence time in the stratosphere of tropospheric air that underwent upward transport through the tropopause and re-entered the troposphere at a later date. (auth)

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Studies on waste fixation in low solubility silicate glasses and advanced disposal concepts for solidified high-level radioactive wastes at the Pacific Northwest Laboratory are reviewed. Waste disposal concepts being evaluated include geologic, seabed, ice sheet, extraterrestrial, and transmutation. (TFD)

The specific heat of noncrystalline solids differs from that predicted by the Debye model by amounts much larger than is known for crystalline solids. This deviation is most pronounced at temperatures below 1 deg K. Near 0.1 deg K. the experimental specific heat approaches a linear temperature dependence and is up to 30 times larger than predicted by the Debye model. This paper describes Brillouin scattering experiments, and also measurements of the thermal conductivity in thin glass fibers. This work is aimed at elucidating the nature of the excitations responsible for this large specific heat. It is concluded that Debye phonons have sufficiently long lifetimes to be considered as good normal modes in noncrystalline solids and also that these phonons are the main carriers of heat at low temperatures. (11 figures. 29 references) (auth)

A live-in type workshop available for academic credit covering basic nuclear power generation and the tradeoffs and problems that exist between nuclear power and alternative means to generate electricity was held for 37 high- school teachers at the Madison campus for the University of Wisconsin. Significant improvements over last year's program included the distribution of a large amount of information and the distribution of two minicourse outlines on the subject of power and the environment entitled: The Environmental Impact of Electrical Power Generation: Nuclear and Fossil'' prepared by the Pennsylvania State Dept. of Education, and Science II Matter-Energy Interactions in Natural Systems'' prepared by Carl Pfeiffer of Monona Grove High School, Monona, Wisconsin. (MCW)

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The PONDER Code (Pictures of Nuclear Device Effects from RANC), which has been used at Lawrence Livermore Laboratory for performing radar blackout analyses is described. PONDER is an executive routine in which the well-known radar blackout code RANC (Radar Absorption Noise and Clutter) is a major subroutine. y a nuclear burst and that cause sufficient absorption or refraction of a signal to make the radar system under study ineffective. In general, PONDER outputs two types of data: computer-generated pictures of blackout, and calculations of blackout area in square kilometers. These computer-generated pictures consist of either a ''projection'' of blackout orto a hemispherical shell or a ''projection'' onto a constant-altitude surface or a''projection'' onto a plane. (TFD)

An on-line/off-line computer system has been dnstalled at the ANL fast neutron generator (FNG) for on-line data acquisition and storage, and for off- line data reduction and evaluation. An operating system called COSACS has been written specifically for the installation. The present report describes all available hardware and software, but emphasizes those aspects of both that were tailored for this application. The various physicaldata channels, both input and output, are discussed with regard to transfer rates, bit formats, and interrupt control. The general relationship and areas of compatibility of COSACS with standard compilers and assemblers are discussed. A complete tabulation is given of operations available under COSACS, together with their input/output formats. (auth)

Brief discussions are given for each of the following areas of research covered during this report period: solid-state laser program, design analysis, component development, diagnostics, gas lasers, chemical lasers---the iodine laser, basic studies and advanced concepts, laser propagation, laser plasmas, laser fusion, isotope separation, and program resources. (MOW)

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