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Fusion Engineering and Design 18 (1991) 265-274 265 North-Holland

Summary: Fusion Engineering and Design 18 (1991) 265-274 265
Post-analysis for the line source phase IIIA experiments of the
USDOE/JAERI collaborative program on fusion neutronics
M.Z. Youssef, A. Kumar and M.A. Abdou
University of California at Los Angeles, Los Angeles, CA 90024, USA
Y. Oyama, K. Kosako and T. Nakamura
Japan Atomic Energy Research Institute, Toka-mura, Naka-gun, Ibaraki-ken, 319-11 Japan
Experimental simulation to a line source has been realized at FNS, JAERI, within the USDOE/JAERI collaborative
Program on Fusion Neutronics. This simulation achieved by cyclic movement of an annular Li20 test assembly relative to a
stationary point source was a step forward in better simulation of the energy and angular distributions of the incident neutron
source found in Tokamak plasmas. Thus, in comparison to other experiments previously performed with a stationary point
source in the program, the uncertainties (that are system-dependent) in calculating important neutronics parameters, such as
tritium production rate, will be more representative of those anticipated in a fusion reactor. The rectangular annular assembly
used is 1.3 m x 1.3 m and 2 m long with a square cavity of 0.42 m x 0.42 m cross-section where the simulated line source is
located axially at the center. There is a 1.5 cm - thick S.S. first wall followed by a 20 cm-thick Li20 zone and a 20 cm - thick
Li2CO3 zone. The ends of the rectangular assembly were left open. Calculations were performed for many measured items
6 7
that included tritium production rate from Li(T6), Li(T7), in-system spectrum measurements, and various activation
measurements [e.g. SSNi(n, 2n), SSNi(n, p), 93Nb(n, 2n), 9°Zr(n, 27 115 t 1972n), Al(n, a), In(n, n ), and Au(n, "r)]. These measure-


Source: Abdou, Mohamed - Fusion Science and Technology Center, University of California at Los Angeles


Collections: Plasma Physics and Fusion