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B. Assumes any liabilities with respect to the us= of, 6r for damages resulting from the use of any information, qpparatus, method, or process disclosed in,ikis report. As used in the above, *person acting on behalf a+ the Commission' includes cany employee or coptractor of the Commission, or employee of such contractor, to the exrent that such employee or contractor ctor 06 the ~ommlssion, or employee of such cantractor prepares, disseminates, ar provides access to,. ~y information pursuant to his employment or contract with the Commission, or his employment with ' such ,contractor.

The status of fast reactor dosimetry is reviewed in terms of the results of recent studies in fast test reactors. Fast reactor dosimetry must provide proper spectral, flux, and fluence information for material and fuel irradiation effects programs and surveillance studies. In this review consideration is given to (1) monitor materials in current use and information needed in the data reduction of reaction product measurements to neutron interaction rates, (2) neutron flux-spectral definition from multiple foil interaction rates and comparison with results based on other methods of analysis, and (3) application of the flux-spectral data to determination of flux levels and fluences. These dosimetry techniques are applied to determine flux spectra and fluence for material irradiation programs. Such information is needed in the determination of damage functions, which relate the damage producing effectiveness of neutrons to their energy. These damage functions permit correlation of irradiation effects data in different thermal and fast reactor irradiation facilities and therefore provide a basis for setting dosimetry accuracy requirements.

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This document copy, since it is trnn'mittrri In flfitiiiiii I nl patent clearance, is mafjg auailahip jn confidence solely forii i»iiir jii i iiiiiii iin i of work under contracts witn tne ^^TWWHTfr'^wwiwrfigpiflMgl^frThis document is not to be published nor its contents otherwise rli-^|inwiill lli ilm n i iMlll |iiiii|iriyi nlhi r than specified above before patent apprqvgt'^tff'such release or use has been secTJTWttaiafiflrequest, from the R. L. Richland Operations Office, U. S. Atomic Liicij,> U.Un*HuuiAaM£ich-Washington 99352. PRELIMINARY REPORT This report contains information of a preliminary nature prepared in the course of work under Atomic Energy Commission Contract AT(451)2170. This information is subject to correction or modification upon the collection ana evaluation of additional data.

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