We wish to measure the EMI efficiency at hadron momenta higher than the 3 GeV used at the Beavatron. We propose to use the 30 M{sup 3} bubble chamber as the momentum and spatial analyzer of charged hadrons both of the incident beam and those final state hadrons of interactions that occur within the chamber. We would use the EMI modules as mounted on the bubble chamber vacuum tank to measure the efficiency of the EMI absorbers (coils and zinc) over a wide range of momenta. A hadron signature would be either the lack of a proportional chamber (pc) encoding within the '96% muon-circle' or a multiple PC encoding. We shall attempt to identify {pi}-{mu} decays in the chamber to use as a source of muons. Such a test would give us experience in spatially reconstructing tracks within the chamber and in projecting their trajectories out to the EMI detector modules. The early portion of this test could utilize whatever hadron beam the NAL bubble chamber group would be using at the time. We would make a copy of an adequate number of the original frames and compare the film quality with the original ones to test whether the EMI …

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Only two of the fecal specimens collected inflight during the Apollo 15 mission were returned for analysis. Difficulty in obtaining reasonably accurate radiation dose estimates based on the cosmogenic radionuclide content of the specimens was encountered due to the limited sampling. The concentrations of {sup 22}Na, {sup 40}K, {sup 51}Cr, {sup 59}Fe, and {sup 137}Cs are reported. The concentrations of 24 major, minor, and trace elements in these two specimens were determined. Most concentrations are typical of those observed previously. Major exceptions are extremely low values for selenium and extraordinarily high values for rare earth elements. The net {sup 210}Po activities in the Apollo 11 and 12 Solar Wind Composition foils and in the Apollo 8 and 12 spacecraft reflective coatings due to lunar exposure have been determined. Equilibrium concentrations of 0.082 {+-} 0.012 disintegrations cm{sup -2} sec{sup -1} of {sup 222}Rn in the lunar atmosphere and 0.0238 {+-} 0.0035 disintegrations cm{sup -2} sec{sup -1} of {sup 210}Po on the lunar surface have been calculated for Oceanus Procellarum. A summary of a paper entitled, "Radon-222 Activity at Oceanus Procellarum," and the text of a manuscript entitled, "Radon-222 in the Lunar Atmosphere," are included as appendices.

From joint power generation conference; New Orleans, Louasiana, USA (16 Sep 1973). The High Temperature Gas Cooled Reactor (HTGR) fuel recycle operation is described. The description includes the HTGR spent fuel shipping system and the proposed method of reprocessing the spent fuel to recover the bred /sup 233/U and /sup 235/U. The process for refabricating the recovered fuel into recycle fuel is also discussed. (auth)

SPEAKEASY has continued to evolve and grow in power. The current production versions, referred to as SPEAKEASY-3, contain many features that have not been formally documented. The needed documentation for the most important of these features is provided in this report. Individual new words that are now available are explained and illustrated in accompanying sample runs. Because of the growing use of the language in interactive situations, emphasis is placed on explaining facilities oriented to such usage. The power of a library-directed programing language is discussed, and the concept of the SPEAKEASY system is introduced. This report is a supplement to previously available documentation.

From meeting on new developments in reactor physics and shieiding calculations; Lake Kiamesha, New York, USA (12 Sep The temperature coefficient of the HTOR is composed of a strong negative Doppler coefficient and a positive moderator coefficient, the net effect being about -10 x 10/sup -5// deg C at operating temperature. the positive moderator coefficient is a result of the absence of significant density coefficients and the nuclear characteristics of U- 233. In addition, selected iission products, principally Xe-135, contribute positive components to the temperature coefficient. Current estimates of the value of the temperature coefficient in the HTGR are presented along with recent experimental data pertinent to the subject. (11 references) (auth)

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During the quarter covered by this progress report (July 15October 15, 1972), the power requirements of a bench test heart pump were determined. Cardiac output response, peak pusher cup forces, and power efficiencies were also determined. These measurements were made in vitro. Several geometries of connectors for the heart pump were evaluated for fit in dead calves to determine a practical configuration. Two models of the nuclear engine were implanted in calves to evaluate the chronic effects of engine weight and size. (auth)

The purpose of this research was to provide the artificial heart design information necessary for the proper development of an implantable nuclear power supply for the artificial heart. A Kwan-Gett hemispherical artificial heant made of silicone rubber was attached to a mock circulation instrumented with pressure, volume and fiow transducers and measurements made of power input to the artificial heant at various locations, source of power losses and efficiencies of the artificial heart under a variety of pumping conditions, volumetric efficiency, pressure required to move the diaphragm of the artificial heat, required motion of the heant diaphragm and pumping characteristics of the antificial heant. The in vitro measurements have been verified by in vivo experiments in calves. The preliminary design of a pumping chamber for the nuclear powered heart has been completed. (auth)

During the quarter covered by this progress report (December 15, 1971 to March 15, 1972), the effects of variations in arterial pressure and heart rate on cardiac ouiput, efficiency as measured at the heart diaphragm, maximum air chamber pressure, average input power to the heart diaphragm, maximum blood chamber pressure and volumetric efficiency have been determined at various atrial pressures for a 7 cm base Kwan-Gett artificial heart made of smooth Silastic and equipped with Silastic flap inflow and Silastic tricuspid outflow valves. One animal experiment has been completed in which the in vitro measurements made on the artificial heart were verified in vivo. A second animal experiment in which the output power of the artificial heart will be determined over a long period of time is now in progress. Preliminary consideration has been given to the establishment of a nuclear powered artificial heart system in vitro test program. A preliminary design of an artificial heart to be driven by a nuclear engine has been drawn. (auth)

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This is the final report for the work performed on Aerojet Nuclear Systems Comany Purchase Order N-900104, "Creep of AISI 347 Stainless Steel in Gaseous Hydrogen."