Segment 4, Northern Trench * Segment 5, Existing exhumed "safe" in a shipping box; and overpacked "safe" contents, and "cups" fi-om the staging pile area.

a Westinghouse Hanford Company _I_"-.'-DISTRIBUTION OF THIS DOCUMENT IS UNLIM_ 3.3.3 NewFacilities and Processes Significantly Different from Existing Ones 3.13 vi 4.0 COMPARISON OF RISKS FORDIFFERENTREMEDIATION STRATEGIESANDOPTIONS: AN ILLUSTRATIONUSING WORKER RISKS FORPROCESSING OF N/K FUEL 4.1 4,1 OVERVIEW OF NUCLEAR MATERIALSMISSIONAREAAND N/K FUELWASTESTREAM. 4.1 4.2 OVERVIEW OF OPTIONS2 AND3 FORN/K FUEL 4.2 4.3 SOURCES OF WORKER EXPOSURE IN N/K FUEL PROCESS ING 4.4 4.3.1 Radiation 4.4 4.3.2 Chemicals 4.4 4.3.3 Radionuclides. 4.5 U.S. Department of Energy. 1990. Twenty-first Annual Report Radiation Exposures for DOEand DOEContractor Employees-1988. DOE/EH-O171P,U.S.

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