Hydrogen solubility was directly measured in specimens of Types 304L, 21-6-9, and modified A-286 austenitic stainless steels saturated with hydrogen at 69 MPa pressure at 470 K. Nitrogen in Type 21-6-9 stainless steel and precipitate morphology in the modified Type A-286 stainless steel altered the hydrogen solubility. Cold work and surface treatment had only minor effects on hydrogen solubility in the three stainless steels. This reports discusses this study.

Input models for the Transient Reactor Analysis Code (TRAC) are described and applications of these models to reactor transients involving small breaks in the primary coolant pressure boundary are demonstrated. The operation of the primary overpressure protection system (relief and safety valves) and the thermal-hydraulic response of the reactor to these transients are obtained from numerical simulations. Also, the effects of steam generator recirculation, steam generator tube rupture, Emergency Core Cooling (ECC) injection and reactivity feedback on the course and consequences of these transients are investigated. These models allow reliable predictions of accident signatures that can help determine the adequacy of equipment and procedures at nuclear power plants to prevent and to control severe accidents.

The beta strength function up to approximately 8.6 MeV for the system /sup 84/As(..beta../sup -/)/sup 84/Se was investigated. It was found that it is not possible to satisfactorily describe S/sub ..beta../ by a statistical model. From the /sup 84/As decay scheme an experimental beta strength function was deduced. Additional information on the beta transition intensity is obtained from the gross coincidence spectra of individual gamma rays. In total these data suggest that the experimental beta strength function above 6.8 MeV is significantly lower than that calculated using a statistical model. Features in the gross coincidence spectra also suggest that a significant bump appears in the experimental beta strength function at approximately 6.5 MeV.

A simple leaching model is given for estimation of leaching rates of thirteen radioisotopes. A literature search with radionuclide migration data is presented in tabular form. This data must be considered in any model for predicting radiation doses from agricultural products or drinking water obtained from contaminated soils. (PSB)

The US Environmental Protection Agency (EPA) is responsible for regulating radioactive airborne effluents in the US. A comprehensive, integrated Computerized Radiological Risk Investigation System (CRRIS) is being developed to support EPA's radiation standards development. This modular system consists primarily of five computer codes and their supporting data bases for estimating environmental transport and radiation doses and risks. Health effects are estimated on the basis of a life-table methodology developed by EPA. CRRIS is designed to provide EPA with a reasonable and flexible way of assessing the risk to man associated with radionuclide releases to the atmosphere.

Effective multiplication factors for 12 critical experiments have been calculated using multigroup cross sections derived from the ENDF/B-V library. All 12 experiments contained mixed plutonium and uranium nitrate solutions. The range of hydrogen-to-fissile plutonium atom ratios spanned by these experiments was 200 to 2200. A comparison with K-effectives calculated with ENDF/B-IV data is presented.

Fuel dissolution operations involving soluble absorbers for criticality control are among the most difficult to establish economical subcritical limits. The paucity of applicable experimental data can significantly hinder a precise determination of a bias in the method chosen for calculation of the required soluble absorber concentration. Resorting to overly conservative bias estimates can result in excessive concentrations of soluble absorbers. Such conservatism can be costly, especially if soluble absorbers are used in a throw-away fashion. An economic scoping study is presented which demonstrates that additional critical experimentation will likely lead to reductions in the soluble absorber (i.e., gadolinium) purchase costs for dissolution operations. The results indicate that anticipated savings maybe more than enough to pay for the experimental costs.

A newly expanded program, directed toward achieving a better appreciation of both the strengths and limitations of on-line, noise-based, long-term surveillance programs for nuclear reactors, is described. Initial results in the complementary experimental (acquisition and automated screening of noise signatures) and theoretical (stochastic modeling of likely noise sources) areas of investigation are given.

The Spent Fuel Test-Climax is a test of retrievable storage in granite of spent nuclear reactor fuel. The rock has been instrumented to measure temperatures, stress changes, and displacements. Periodic tape extensometer readings provide test drift convergence data. Vertical and horizontal tape readings are made at five locations in each of two 3.4m x 3.4m (11 ft x 11 ft) drifts and six locations in a 4.6m x 6.2m (15 ft x 20.5 ft) drift. The sensitivity of the readings to temperature effects, errors in temperature corrections, change of steel tape, and change of operator has been examined. Calculated corrections for temperature-induced changes in distance range from 0.001 in. to 0.003 in.//sup 0/C. A tape changeout evidenced both a systematic error apparently due to slight changes in tape registration during punching and to nonidentical location of punched holes in the two tapes and a random error due to variability of reading and punching operations. These errors were corrected by making duplicate measurements for the tapes. Tape readings by the same operator have been repeatable within +-0.001 in. in the smaller drifts and +-0.002 in. in the larger. Different operators have been able to repeat readings to within +-0.004 in. (usually …

It was shown that substantial temporal distortion of nanosecond 10.6 ..mu..m laser pulses occurs in traversing multiphoton saturable absorbers. The risetime and pulse delay effects appear to depend both on fluence and wavelength, and to be qualitatively consistent with predictions of a simple two-level absorption model.

Prominent hot-band effects have been observed in the 9.4 and 10.6 ..mu..m gain spectrum of an 1800 Torr electron-beam-controlled-discharge CO/sub 2/ laser amplifier. The data are in good agreement with theoretical calculations at 53 different frequencies.

Prominent hot band effects have been observed in the 9.4 and 10.6 ..mu..m gain spectrum of an 1800 torr electron-beam-controlled-discharge CO/sub 2/ laser amplifier. Theoretical calculations agree well with data at 53 wavelengths.

Absorption spectra obtained from SmBr/sub 3/, SmBr/sub 2/, and Sm0Br were used in identifying the samarium species in several mixed-valence Sm(II/III) compounds produced by H/sub 2/ reduction of SmBr/sub 3/. The nature of the absorption of Sm0Br made it possible to detect even traces of Sm0Br in the Sm bromides.

The matrix variational Pade approximant and its generalization to elastic wave scattering are discussed. Predictions of the method for the scattering of a longitudinal plane wave are compared with the exact scattering from spherical voids and inclusions. Its predictions are also compared to those of the first four partial sums of the Born Series for the scattered amplitude. Generally, the fourth partial sum and the variational results compare poorly with the exact results for ka less than or equal to 2 if the scatterer is strong, but compare well for ka less than or equal to 10 if the scatterer strength is at best modest. The breakdown of the favorable comparison is traced to the divergence of the Born Series for strong scatterers. It is also demonstrated that by use of the N-point Pade approximant a good comparison with exact results can be obtained for all scatterer strengths.

The progress of the Rayleigh-Schroedinger perturbation theory approach to the computations of the ground-state energy in an infinite Fermion system is reviewed.

Using a master oscillator-power amplifier (MOPA) configuration, 100J has been obtained from a 5 l optical volume KrF amplifier pumped at 300 kW/cm/sup 3/ peak at the end of a 500 nsec pulse. A normalized input flux of 0.4 (I/I/sub sat/) was required to reduce amplified spontaneous emission (ASE) to one half the free running value. A peak extraction efficiency of 0.46 was obtained under these conditions at 1 atm total pressure. A kinetics model has been developed and refined to give excellent agreement with high and low pump regimes. An integrated kinetics and pulse propagation code has also been developed and agrees well with experiment.

For the Record section including the minutes of the quarterly board meeting of the Board of Directors of the OHS that was held on October 23, 1980. It also includes a list honoring the donors who gave gifts to the OHS in the third quarter of 1980 and lists of new annual and new life members of the OHS from July 25 to October 23 of 1980.

For the Record section including the minutes of the quarterly board meeting of the Board of Directors of the OHS that was held on January 29, 1981. It also includes a list honoring the donors who gave gifts to the OHS in the fourth quarter of 1980 and lists of new annual and new life members of the OHS from October 24 of 1980 to January 29 of 1981.

For the Record section includingthe minutes of the annual meeting of the Oklahoma Historical Society and the quarterly board meeting of the Board of Directors of the OHS that was held on October 23, 1980. It also includes the new committee assignments on the OHS Board of Directors. It also includes a list honoring the donors who gave gifts to the OHS in the first quarter of 1981 and lists of new annual and new life members of the OHS from January 30 to April 29 of 1981.

For the Record section including the minutes of the quarterly board meeting of the Board of Directors of the Oklahoma Historical Society that was held on July 29, 1981. It also includes a list honoring the donors who gave gifts to the OHS in the second quarter of 1981 and lists of new annual and new life members of the OHS from April 30 to July 29 of 1981.

Notes and Documents column including a personal narrative written by Nettie DeMoss about her experiences growing up in Indian Territory. Norman Crowe, editor of the document, provides an introduction to the piece.

Notes and Documents column including a biographical sketch about Ethel Mae Brindley, a woman who grew up in Oklahoma Territory and recalls memories of her life and the communities she became involved with.

Notes and Documents column including an amended version of Oklahoma Historical Society constitution that was adopted on March 13, 1981.

Notes and Documents column including a document listing the awards and prizes given to the best articles published by the journals of Southwest historical societies, including the Oklahoma Historical Society, the Texas State Historical Association, and the Kansas State Historical Society.