A summary of the activities in the 4th operational year is presented for the ORR. On-stream time at 30 Mw was relatively steady with 75.4 and 83.7% representing the lowest and highest quarters. Modification of the ball-latch mechanism of the shim-rod-drives is in progress. The primary cooling system bypass control valve was modified and a d-c pony motor was added at the No. 3 primary pump. This addition was made to increase the reliability of adequate water flow for afterheat cooling. A study of coreboiling detection is being conducted. (J.R.D.)
U.S. Atomic Energy Commission depository collection.
Note
DOE contract number: W-7405-ENG-26 NSA number: NSA-16-034115 OSTI Identifier 4785343 Research organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States).