Work performed by Battelle-Northwest and its supporting contractors on the AEC-sponsored Fast Flux Test Facility Project is summarized and interpreted for the reporting period. Project activities are reported herein under the following major headings: Plant Design, Construction, and Operation; Components Development; Instrument and Controls Development; Sodium Technology, Core Development; Reactor Materials Development; Fuels Development; Physics; and Reactor Safeguards.

This report was prepared at Pacific Northwest Laboratory by Battelle-Northwest (BNW) under Contract No. AT(45-1)-1830 for the Atomic Energy Commission, Division of Reactor Development and Technology. It is a report on design-related technical progress for the Fast Flux Test Facility, during the period October 1, 1968 through February 28, 1969.