We have studied the sensitivity of health impacts and economic costs from hypothetical nuclear reactor accidents, as predicted by the CRAC2 computer code, to undertainties in selected non-meteorological models and parameters. The sources of uncertainty include (1) dose conversion factors for inhalation as affected by uncertainties in the particle size of the carrier aerosol and clearance of radionuclides from the respiratory tract, (2) the weathering half-time for external ground-surface exposure, and (3) transfer coefficients for terrestrial foodchain pathways. Uncertainties in inhalation dose conversion factors affected predicted early injuries by as much as 1 to 2 orders of magnitude in runs with fixed weather sequences, whereas the effects on early fatalities were less than a factor of 2 and on latent cancer fatalities less than 10%. Uncertainties in the weathering half-time for ground-surface exposure affected latent fatalities by a factor of 2 to 3 but economic costs by less than a factor of 2. Uncertainties in the transfer coefficients for terrestrial foodchain pathways affected latent fatalities by less than 15% and had no effect on economic costs. 10 references.

Damage profiles in crystalline silicon produced by light (B) and heavy (Bi) ions with energies from 10 to 100 keV were studied using the computer program MARLOWE (version 12). The program follows not only the incident ion collision by collision, but also any Si target atom that is set into motion through an energetic collision. Thus, the transport effect of the complete cascade of recoiled target atoms is included in the damage profile. The influence of channeling was studied for Si(100) using beam tilt angles from the surface normal of 0/sup 0/, 3/sup 0/ and 7/sup 0/ about the (001) or (011) axes. The effects of channeling on the damage profile are twofold: first, there is a large reduction of the central damage peak; second, there is a component of the damage profile that extends considerably deeper into the target than that found in conventional studies using a random target assemblage. The influence of amorphous overlayers of SiO/sub 2/ on the damage and implantation profiles in the Si(100) substrate has also been investigated.

In a remarkable experiment on an Mn-Al alloy, Shechtman et al. observed a diffraction spectrum with icosahedral symmetry. This is inconsistent with discrete translational invariance since the symmetry includes a five-fold axis. In this paper, it is shown that the crystallography and diffraction pattern can be described by a six-dimensional space group. The crystal structure in 3d is obtained as a cut along a 3d hyperplane in a regular 6d crystal. Displacements of the 6d crystal along 6 orthogonal directions define 6 continuous symmetries for the icosahedral crystal, three of which are phase symmetries describing internal rearrangements of the atoms.

Personal reminiscences of the author's work at the Bevatron in the 1950's are given. Setting up photographic emulsions and startup of the Bevatron are recalled. A brief account is given of the physics prior to the Bevatron, followed by the development of the machine and its use to study K mesons, theta and tau particles. The search for the antiproton is remembered. 16 refs., 6 figs. (LEW)

Article provides a biographical tribute to the life and career of Edith Force Kassing, an Oklahoma science teacher who pursued ornithological and herpetological research. Her former student, John S. Tomer, discusses her educational background as well as the types of specimen collections she exhibited.

The twenty-two papers are arranged into eleven sessions entitled: general overviews; time-resolved x-ray scattering; studies using fluorescence, ion-containing polymers; time-resolved x-ray scattering; novel applications of synchrotron radiation; phase transitions in polymers; x-ray diffraction on polymers; recent detector advances; complementary light, x-ray and neutron studies; and neutron scattering studies. Seven of the papers are processed separately; three of the remainder have been previously processed. (DLC)

Separate abstracts are included for each of the papers presented concerning excellence in operator training; achieving excellence through the accreditation process; managing and organizing the training function; operations training methods and processes; the role of simulators in achieving excellence; maintenance and technical training methods and processes; staffing and qualifying the training organization; and measuring training effectiveness.

None

The workshop contains presentations in the following areas: (1) reservoir engineering research; (2) field development; (3) vapor-dominated systems; (4) the Geysers thermal area; (5) well test analysis; (6) production engineering; (7) reservoir evaluation; (8) geochemistry and injection; (9) numerical simulation; and (10) reservoir physics. (ACR)

A report dedicated to the 1985 EPRI/IIE Geothermal Conference and Workshop

The research and development program of DOE's Geothermal Technology Division is reviewed in separate presentations according to program area. Separate abstracts have been prepared for the individual papers. (ACR)