U.S. Department of EnergyOffice of Scientific and Technical Information
Activation studies on ThO/sub 2/-containing slab assemblies driven by (D,T) neutrons
Abstract
Most of the blanket designs of fusion breeders foresee the incorporation of thorium as an essential ingredient of the fissile breeding zone. The first blanket retained for experiments at the LOTUS facility is a fission-suppressed typed that includes a ThO/sub 2/ zone made of ThO/sub 2/ rods clad in aluminum. In the first phase of experiments completed, the spectrum measurements were done with a 2- x 2-in. NE-213 spectrometer located behind various slab assemblies derived from this blanket. A low-intensity beam was used in these experiments. The second phase consists of doing experiments on the same assemblies with the high-intensity Haefely generator. Both the activation foils and a small 1.3-cm-diam x 1.2-cm-high NE-213 detector placed inside an assembly are planned to be used. The analysis of the experiments has been done with the two-dimensional discrete ordinates code DOT3.5, which, in turn, gets the uncollided fluxes and the first collision source from the auxiliary code GRTUNCL. All the assemblies have been analyzed with a two-dimensional R-Z model, excluding room walls. All the measured reaction rates have been evaluated. Generally, the agreement is good between the measured and the computed values. However, there is a significant discrepancy for the foil located atmore »
- Authors:
- Publication Date:
- OSTI Identifier:
- 5807148
- Report Number(s):
- CONF-8711195-
Journal ID: CODEN: TANSA
- Resource Type:
- Conference
- Journal Name:
- Trans. Am. Nucl. Soc.; (United States)
- Additional Journal Information:
- Journal Volume: 55; Conference: American Nuclear Society winter meeting, Los Angeles, CA, USA, 15-19 Nov 1987
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BREEDING BLANKETS; DESIGN; INDIUM 115 TARGET; NEUTRON REACTIONS; REACTION KINETICS; NICKEL 58 TARGET; NIOBIUM 93 TARGET; THORIUM OXIDES; FISSIONABLE MATERIALS; ZIRCONIUM 90 TARGET; ACTIVATION DETECTORS; COMPARATIVE EVALUATIONS; D CODES; EXPERIMENTAL DATA; HYBRID REACTORS; LITHIUM; LOTUS FACILITY; MATHEMATICAL MODELS; MODERATORS; NEUTRON SOURCES; RODS; SLABS; SPECTROMETERS; TWO-DIMENSIONAL CALCULATIONS; ACTINIDE COMPOUNDS; ALKALI METALS; BARYON REACTIONS; CHALCOGENIDES; COMPUTER CODES; DATA; ELEMENTS; HADRON REACTIONS; INFORMATION; KINETICS; MATERIALS; MEASURING INSTRUMENTS; METALS; NEUTRON DETECTORS; NUCLEAR REACTIONS; NUCLEON REACTIONS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PARTICLE SOURCES; RADIATION DETECTORS; RADIATION SOURCES; REACTOR COMPONENTS; TARGETS; THORIUM COMPOUNDS; 700201* - Fusion Power Plant Technology- Blanket Engineering
Citation Formats
Kumar, A, Sahraoui, C, Schaer, M, and Ramakrishna, D V.S. Activation studies on ThO/sub 2/-containing slab assemblies driven by (D,T) neutrons. United States: N. p., 1987.
Web.
Kumar, A, Sahraoui, C, Schaer, M, & Ramakrishna, D V.S. Activation studies on ThO/sub 2/-containing slab assemblies driven by (D,T) neutrons. United States.
Kumar, A, Sahraoui, C, Schaer, M, and Ramakrishna, D V.S. 1987.
"Activation studies on ThO/sub 2/-containing slab assemblies driven by (D,T) neutrons". United States.
@article{osti_5807148,
title = {Activation studies on ThO/sub 2/-containing slab assemblies driven by (D,T) neutrons},
author = {Kumar, A and Sahraoui, C and Schaer, M and Ramakrishna, D V.S.},
abstractNote = {Most of the blanket designs of fusion breeders foresee the incorporation of thorium as an essential ingredient of the fissile breeding zone. The first blanket retained for experiments at the LOTUS facility is a fission-suppressed typed that includes a ThO/sub 2/ zone made of ThO/sub 2/ rods clad in aluminum. In the first phase of experiments completed, the spectrum measurements were done with a 2- x 2-in. NE-213 spectrometer located behind various slab assemblies derived from this blanket. A low-intensity beam was used in these experiments. The second phase consists of doing experiments on the same assemblies with the high-intensity Haefely generator. Both the activation foils and a small 1.3-cm-diam x 1.2-cm-high NE-213 detector placed inside an assembly are planned to be used. The analysis of the experiments has been done with the two-dimensional discrete ordinates code DOT3.5, which, in turn, gets the uncollided fluxes and the first collision source from the auxiliary code GRTUNCL. All the assemblies have been analyzed with a two-dimensional R-Z model, excluding room walls. All the measured reaction rates have been evaluated. Generally, the agreement is good between the measured and the computed values. However, there is a significant discrepancy for the foil located at the flat surface of the generator (position = -1.5 cm). This could come from the difference in the modeled and actual beam profile incident on the target (the detector position is so close to the target and thus is very sensitive to the details of the beam). At locations far from the target, however, the details of the beam profile would be less important. The /sup 115/In(n,n/sup 1/) to /sup 90/Zr(n,2n) activity ratios as a function of the detector position inside the ThO/sub 2/ assembly demonstrate good confidence in the thorium cross section and two-dimensional modeling. 10 refs., 3 fig.},
doi = {},
url = {https://www.osti.gov/biblio/5807148},
journal = {Trans. Am. Nucl. Soc.; (United States)},
number = ,
volume = 55,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1987},
month = {Thu Jan 01 00:00:00 EST 1987}
}