The measurement of gamma heating in a fusion blanket test assembly [electronic resource].
- Washington, D.C : United States. Dept. of Energy. Office of Energy Research, 1989.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: (4 pages) : digital, PDF file
- Additional Creators:
- Argonne National Laboratory, United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Determining the distribution of gamma heating in fusion test assemblies will help guide the construction and operation of future experiments. Currently the dominant technique for spatial characterization of heating is the wide dispersal of thin film TLD's, which are limited to measurement of the total neutron + gamma dose. The present work measures heating using calibrated proportional counters, which allows for the rejection of fast pulse-rise events characteristic of ionizations produced by neutron induced atomic recoils. A coupled calculational and experimental program designed to demonstrate this capability has been initiated at ANL. An irradiation assembly composed of graphite-filled 5 × 5 × 61 cm Mg sleeves in cubic geometry was constructed. This assembly was then irradiated in turn with Co-60 gammas and 14.8-MeV neutrons produced by a D-T neutron generator in two sets of measurements with the proportional counter occupying various positions in the central channel of the assembly. Calculation of the expected dose in the assembly due to the sources at the positions of interest were made. These calculations first generated the neutral flux profile in the assembly with either ANISN or MCNP depending on the degree of detailed used in the modelling of the counter. The profile is then fed into a charged-particle generation model to obtain the charged-particle profiles, hence energy deposition in the assembly. A comparison was made between these calculations of the energy deposition and measured energy deposition in the assembly. It is hoped that by understanding this comparison a clear picture of gamma heating in a mixed gamma and neutron environment will be obtained.
- Report Numbers:
- E 1.99:conf-891007-120
- Other Subject(s):
- Published through SciTech Connect.
13. IEEE symposium on fusion engineering, Knoxville, TN (USA), 2-6 Oct 1989.
Bennett, E.F.; Micklich, B.J.; Chiu, H.K.
- Funding Information:
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