The INEL beryllium multiplication experiment [electronic resource].
- Published
- Washington, D.C. : United States. Dept. of Energy, 1991.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- Pages: (50 pages) : digital, PDF file
- Additional Creators
- United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- The experiment to measure the multiplication of 14-MeV neutrons in bulk beryllium has been completed. The experiment consists of determining the ratio of ⁵⁶Mn activities induced in a large manganese bath by a central 14-MeV neutron source, with and without a beryllium sample surrounding the source. In the manganese bath method a neutron source is placed at the center of a totally-absorbing aqueous solution of MnSo₄. The capture of neutrons by Mn produces a ⁵⁶Mn activity proportional to the emission rate of the source. As applied to the measurement of the multiplication of 14- MeV neutrons in bulk beryllium, the neutron source is a tritium target placed at the end of the drift tube of a small deuteron accelerator. Surrounding the source is a sample chamber. When the sample chamber is empty, the neutrons go directly to the surrounding MnSO₄ solution, and produce a ⁵⁶Mn activity proportional to the neutron emission rate. When the chamber contains a beryllium sample, the neutrons first enter the beryllium and multiply through the (n,2n) process. Neutrons escaping from the beryllium enter the bath and produce a ⁵⁶Mn activity proportional to the neutron emission rate multiplied by the effective value of the multiplication in bulk beryllium. The ratio of the activities with and without the sample present is proportional to the multiplication value. Detailed calculations of the multiplication and all the systematic effects were made with the Monte Carlo program MCNP, utilizing both the Young and Stewart and the ENDF/B-VI evaluations for beryllium. Both data sets produce multiplication values that are in excellent agreement with the measurements for both raw and corrected values of the multiplication. We conclude that there is not real discrepancy between experimental and calculated values for the multiplication of neutrons in bulk beryllium. 12 figs., 11 tabs., 18 refs.
- Report Numbers
- E 1.99:egg-phy-9615
egg-phy-9615 - Subject(s)
- Other Subject(s)
- Beryllium
- Multiplication Factors
- Manganese Sulfates
- Neutron Detection
- Aqueous Solutions
- Breeding Blankets
- Deuteron Beams
- Drift Tubes
- Monte Carlo Method
- Neutron Emission
- Progress Report
- Tritium Target
- Alkaline Earth Metals
- Beams
- Detection
- Dispersions
- Document Types
- Elements
- Emission
- Ion Beams
- Manganese Compounds
- Metals
- Mixtures
- Oxygen Compounds
- Radiation Detection
- Reactor Components
- Solutions
- Sulfates
- Sulfur Compounds
- Targets
- Transition Element Compounds
- Note
- Published through SciTech Connect.
03/01/1991.
"egg-phy-9615"
"DE92003337"
Smith, J.R.; King, J.J.
EG and G Idaho, Inc., Idaho Falls, ID (United States) - Funding Information
- AC07-76ID01570
View MARC record | catkey: 14750907