The emphasis during the first quarter has been directed toward evaluating radiometric approaches to find the optimum technique to measure temperature in an entrained gasifier environment. In this regard, it was concluded that while total radiation measurements were helpful in providing designers with total radiation loads to hardware, it was not acceptable as a means of measuring temperature for the gas/particle environment considered. To make the temperature measurements, one, two, and three line radiometers (pyrometers) were evaluated. It was found that a single (one) line pyrometer measurement of resonance radiation from a trace alkalai metal in the gas provides a very promising technique to provide spatially resolved temperature measurements. A detailed description of governing equations controlling this technique is given. During the next quarter, laboratory prototype probes will be assembled, tested and evaluated. 8 figures, 10 tables.

In this study we investigate how the design of the neutron blanket effects the displacement damage rate in the first structural wall (FSW) of an Inertial Confinement Fusion (ICF) reactor. Two generic configurations are examined; in the first, the steel wall is directly exposed to the fusion neutrons, whereas in the second, the steel wall is protected by inner blanket of lithium with an effective thickness of 1-m. The latter represents a HYLIFE-type design, which has been shown to have displacement damage rates an order of magnitude lower than unprotected wall designs. The two basic configurations were varied to show how the dpa rate changes as the result of (1) adding a Li blanket outside the FSW, (2) adding a neutron reflector (graphite) outside the FSW, and (3) changing the position of the inner lithium blanket relative to the FSW. The effects of neutron moderation in the compressed DT-target are also shown, and the unprotected and protected configurations compared.