On June S, 1973, the 241-T-106 underground liquid waste storage tank, located on the U. S. Atomic Energy Commission's Hanford reservation, was confirmed as leaking. It was predicted that the leaked waste would be retained by the dry sediments well above the water table. A study was instigated to confirm this prediction. Results show the deepest penetration observed was 27 meters below the ground surface or 35 meters above the water table (approximately S7 and 116 feet, respectively). Based on these results and the basic knowledge of liquid movement in Hanford sediments, further movement of the radioactivity from its present location will be negligible. (auth)

A compilation is presented of attributes and variables acceptance sampling plans and procedures which may be used as a ready reference to provide protection to both supplier and purchaser whenever sampling inspection is involved. Some of the basic and underlying principles involved in these plans and procedures are discussed. The plans and procedures provide for selection of adequate sample quantities and evaluation of inspection data for the purpose of determining conformance to the specified lot tolerance percent defective (LTPD) and BETA error acceptance criteria. (auth)

The present status of the AEC/RECON project is discussed, with particular reference to the ORNL participation. A little of the history of the project is given, plus some technical description and a user's manual. AEC/RECON is an information retrieval prolect that uses CRT screens for rapid display of results from computerized files. Bibliographic data from Nuclear Science Abstracts and other data bases are available for searching. The project came to ORNL in 1971 with 5 terminals and 150,000 bibliographic entries. Now there are 15 terminals and 300,000 entries. (auth)

Afterheat rates were calculated for the HTGR utilizing new input information. The new afterheat results are a few percent higher than the HTGR afterheat results previously obtained in the 100-to 10,000-sec time range and are 11 to 15% higher than the previous results in the one-day to ten-days time range. The uncertainties were studied in the time region from 100 sec to ten days. The new results were also compared with calculations at other laboratories. The gamma-ray spectra were computed at several shutdown times for future applications in shielding studies. Previous afterheat calculations for the HTGR are completely replaced and updated. (auth)

A new method for one-dimensional stress analysis of steel liners in prestressed concrete reactor vessels is presented. The method uses a stiffness approach in which the final set of simultaneous equations are equations of equilibrium written in terms of unknown nodal displacements. The development of the method and the solution technique are described. The method is illustrated by a parametric study of the effects of liner design variables. (JWR)

None

The Lawrence Livermore Laboratory program for research and development of direct energy conversion for fusion reactor application is described. A new test facility consisting of a system of magnets, a vacuum chamber, and collector structure of unusual shapes and sizes is described. Under laboratory conditions, the anticipated collection efficiencies are 65% for a 2-stage venetian blind collector concept and 89 to 90% for a 22stage peropdoc focussing concept. Because of space charge considerations, the venetian blind concept appears to be appropriate in the 100- to 200-keV ion energy range whereas the periodic focussing concept is more interesting in the 500- to 800-keV range. (auth)

An analytical model (the BOTE model) based upon a superposition of the limiting forms for the outgoing stress wave (i.e., a strong shock at early times decaying to a simple acoustic wave at later times) is presented as a means to describe the groundmotion phenomena resulting from underground nuclear explosions. Taking into account the effects of both the porosity and the water content of the surrounding medium, the BOTE model provides good agreement with both calculated and experimental data for times ranging from tens of microseconds to tens of milliseconds, and for distances ranging out to 350 ft/kt . (auth)

Bunched beams can be unstable against longitudinal collective oscillations. In particular, the interaction of a beam with perfectly conducting chamber walls can force the beam into a condition of latent instability. In such a state, growth of oscillation modes can ensue as a result of wall resistivity or as a consequence of the interaction of the beam with resonant structures in the ring. The dependence of the stability criteria on energy, rf voltage, and rf frequency is given. It is shown how a high frequency rf system tends to stabilize the bunches. A speciflc set of parameters for an essentially nonstacked bunched beam p-p storage ring, parameters that are consistent with using the AGS as an injector, is considered. (auth)

Thesis. Exposure of rats to 700 rads whole-body /sup 60/Co gamma irradiation increased capillary permeabilily by 47% and increased lymph flow by 124% 48 hrs following irradiation, while exposure to 1000 rads caused an increase of capillary permeability of 98%, but did not change lymph flow from control values. The latter result may have been due to the relative dehydration and immobility of the 1000 rad group. Rats drinking large quantities of 5% dextrose + 0.7% NaCl solution did not increase lymph flow measurably above control levels. (CH)

None

Multiwire proportional chambers (MWPC) designed for use in a positron camera for nuclear medicine applications are described. The coordinated of the two anihilation gamma rays are detected in the chamber by their interaction with thin lead converters placed on both faces of each chamber. In order to obtain reasonable efficiencies (10%) the lead converters have been made in a square honeycomb-like structure, which increases the effective surface area and also permits the application of a drift field to extract the electrons into the active area of the MWPC. (auth)

None

The radiation-induced conversion of para to orthohydrogen was investigated at pressures between 150 and 2200 psig (1 to 15 x 10/sup 6/ N/meter/ sup 2/) at three temperatures: 77 deg K (LN/sub 2/), 200 deg K (dry ice), and 300 deg K (ambient). Two radiation dose levels were studied: gamma rays only at 8 x 10/sup 6/ rads and a combination of 5 x 10/sup 14/ n/cm/sup 2/ E> 1 MeV, plus gamma rays at 8 x 10/sup 5/ rads. The conversion at LN/sub 2/ temperature was nearly zero in all cases. (auth)

None

In response to the discovery of a nonlinear index of refraction (n/sub 2/ ) in Nd: glass laser media, experimenters have traditionally expanded the beam diameter (and reduced the intensity) to alleviate the self-focusing tendency. It is proposed here to reduce the peak intensity by injecting a lower intensity and longer-duration pulse into the amplifier chain. It is predicted that the glass nonlinearity will impress upon the pulse a chirp suitable for efficient temporal compression. This may result in more efficient laser operation. Related schemes have been used in radar systems. As an example, the evolution of a 1 nsec (full 1/e duration) temporally Gaussian pulse in a 2 m long Nd: glass laser chain was calculated. For a chain averaged intensity of 2 GW/cm/sup 2/, one calculates that the pulse could be subsequently compressed (by a series of GiresTournois interferometers) to 125 psec with good stability against input pulse amplitude noise. (auth)

The dissolution of aluminum-clad uranium oxide-aluminum fuel was studied to provide basic data for dissolving this type of enriched uranium fuel at the Savannah River Plant. The studies also included the dissolution of a similar material prepared from scrap uranium oxides that were to be recycled through the solvent extraction process. The dissolving behavior of uranium oxide-aluminum core material is similar to that of U-Al alloy. Dissolving rates are rapid in HNO/sub 3/-Hg(NO/sub 3/)/sub 2/ solutions. Irradiation reduce s the dissolving rate and increases mechanical strength. A dissolution model for use in nuclear safety analyses is developed, . based on the observed dissolving characteristics. (auth)

Distributions were measured for nitric acid, americium, curium, cerium, neodymium, samarium, europium, manganese, and mercury between 30 vol % THP in n- paraffin and aqueous solutions containing nitric acid, aluminum nitrate, lithium nitrate, and/or sodium nitrate. Equations for the distributions were derived from the data and used in designing solvent extraction flowsheets for recovery and decortamination of americium and curium from irradiated plutonium- aluminum alloy. Also investigated was the effect of DTPA acid on the distribution of the actinides and lanthanides in the same systems. The actinides (Am and Cm) are more strongly complexed than the light lanthanides (La, Ce, Pr, and Nd) by DTPA acid. By controlling the solution pH in the range of 1 to 3, separation of actinides from lanthanides by factors of 10 to 100 may be obtained by extraction with 30% THP. (auth)

None

None

Results from the Hanford Engineering Development Laboratory (HEDL) experimental investigations of ceramics and ceramic-tometal end seals for reactor instrumentation cables were combined with information available in published reports from various laboratories to provide recommendations for further development of cables suitable for long-term, in-vessel operation in the Fast Flux Test Facility (FFTF) and in future liquid metal, fast breeder reactors (LMFBRs). The study focused on Al/sub 2/O/sub 3/ with major attention devoted to the specific problem area of the ceramic-to-metal end seals for use with instrumentation cables. Ceramic mixtures of alumina, as the major constituent, with silica, calcia and magnesia were considered with variations in the alumina concentration - and grain size as parameters. Stronger ceramic-to-metal bond strengths can be achieved using lower Al/sub 2/O/sub 3/ concentrations ( ~94%) and larger grain size ( ~30 mu m), while adverse radiation effects are minimized with higher concentrations ( ~99%) and smaller grain sizes (~3 to 5 mu m). Further, the electrical properties of ceramic-to-metal seals are best for a single material of high purity, high density, unglazed Al/sub 2/O/sub 3/. Parameters which normally produce good bonding can result in decreased resistance to radiation damage and poor electrical propenties; thus, parametric compromises or …

None

None

A research program in energetic-neutron spectrometry was carried out under Contracts AT(30-1)-3914 and AT(11-1)-5255 with Clarkson College of Technology during the period from 1 December 1967 through 31 March 1972. Accomplishments under this program include the development of a self-contained time-of-flight spectrometer for neutrons from 1 to 500 MeV and the measurement of neutron spectra from a thick target. Basically, the spectrometer measures the time-of-flight of a neutron scattered between two scintillation counters. The intrinsic time dispersion of the system is 2.2 nanoseconds (fwhm) with a 2 1/2 ameter by 8 inch thick second detector. For a flight path of 4 meters, the energy resolution of the spectrometer varies from about 2 x 10/sup -5/ at 10 MeV to 8 x 10/sup -7/ at 500 MeV. Background from neutroncarbon interactions is determined from separate spectral measurements with first detectors differing significantly in their relative hydrogen- carbon composition. Measurements with 14 MeV neutrons confirm the resolution and efficiency of the epectrometer at low energies. Measurements at 220 MeV verify the resolution of the spectrometer at this energy and demonstrate the technique for subtracting the carbon background. Neutron spectra from 740 MeV proton bombardment of a 30-cm thick uranium target were measured …