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Partitioning between sediment and porewater of radiocesium from Chernobyl fallout

Description: As part of a joint USA/USSR Environmental Agreement to determine the distribution and concentration of Chernobyl radioactivity in the northwest Black Sea area, the sediment from eight stations was collected and analyzed to assess the ability of sediment from the northwest Black Sea to adsorb radiocesium. Two methods were used to determine partitioning between liquid and solid phases; batch tests and porewater separation. In the batch test, Cs-137 tracer was added to mixtures of sediment and bot… more
Date: April 23, 1991
Creator: Fuhrmann, M.; Pietrzak, R. (Brookhaven National Lab., Upton, NY (USA)); Neiheisel, J. & Dyer, R. (Environmental Protection Agency, Washington, DC (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Emittance variations in current-amplifying ion induction linacs

Description: Since 1985 the Heavy Ion Fusion Accelerator Research program at the Lawrence Berkeley Laboratory has been studying current amplification and emittance variations in MBE-4, a four-cesium-beam induction linac. This experiment models much of the accelerator physics of the electrostatically focused section of a fusion driver. Four space-charge dominated Cs{sup +} beams, initially about one meter in length at currents of 5--10 mA, are focused by electrostatic quadrupoles and accelerated in parallel … more
Date: April 1, 1991
Creator: Fessenden, T.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

TFE verification program

Description: The program objective is to demonstrate the technology readiness of a thermionic fuel element (TFE) suitable for use as the basic element in a thermionic reactor with electric power output in the 0.5 to 5.0 MW(e) range, and a full-power life of 7 years. This report states progress made in the following tasks: concept design, converter performance, insulator seal, sheath insulator, fueled emitter, cesium reservoir and interconnective TFE components, and thermionic fuel element testing. 20 refs.,… more
Date: April 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Low-emittance uniform density Cs sup + sources for heavy ion fusion accelerators studies

Description: Low-emittance (high-brightness) Cs{sup +} thermionic sources were developed for the heavy ion induction linac experiment MBE-4 at LBL. The MBE-4 linac accelerates four 10 mA beams from 200 ke V to 900 ke V while amplifying the current up to a factor of nine. Recent studies of the transverse beam dynamics suggested that characteristics of the injector geometry were contributing to the normalized transverse emissions growth. Phase-space and current density distribution measurements of the beam ex… more
Date: April 1, 1991
Creator: Eylon, S.; Henestroza, E.; Garvey, T.; Johnson, R. & Chupp, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Fission product plateout and liftoff in the MHTGR primary system: A review

Description: A review is presented of the technical basis for predicting radioactivity release resulting from depressurization of an MHTGR primary system. Consideration is restricted to so called dry events with no involvement of the steam system. The various types of deposition mechanisms effective for iodine, cesium, strontium, and silver are discussed in terms of their chemical characteristics and the nature of the materials in the primary system. Emphasis is given to iodine behavior, including means for… more
Date: April 1, 1991
Creator: Wichner, R.P. (Oak Ridge National Lab., TN (USA))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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