DEVELOPMENT OF HYDRAULIC BALL (HY-BALL) CONTROL SYSTEM. Fifth Quarterly Progress Report, July-September 1963

Technical Report · Tue Oct 01 04:00:00 EDT 1963

OSTI ID:4165074

The physics analysis (including burnup effects and an approximation of the void-distribution effects) of the axial power distribution of a core, with the upper 5 feet having a higher U/sup 235/ enrichment than the lower plus or minus 1/2 feet, was completed. A physics analysis (including burnup and voiddistribution effects) of the axial power distribution of a core with an axial zone of distributed poison was completed, with the exception of burnup calculations. Lift and scram tests were run with satisfactory results on a promising type of buffer system, called the flow-control buffer. The first series of room temperature leakage tests and reactor temperature cycling tests was satisfactorily completed on two three-way control valves. The second and third series of tests on the Hy-Ball columns in the hot test loop were satisfactorily completed. The second series of tests consisted of holding the simulated control elements in the up position in stainless steel vertical tube hoppers (simulating the out-of-core position) for 500 hr. The third series of tests consisted of holding the simulated control elements in the down position (simulating the in-core position) for 1200 hr with Zircaloy tubing in the lower half of the Hy-Ball column assemblies. No vibration-induced wear and/or fretting corrosion of andy significance and no sticking of control elements were observed. (auth)

• Research Organization: General Nuclear Engineering Corp., Dunedin, Fla.
• NSA Number: NSA-18-001188
• OSTI ID: 4165074
• Report Number(s): GNEC-299
• Country of Publication: United States
• Language: English

Related Subjects

BURNUP
CONTROL ELEMENTS
CONTROL SYSTEMS
CORROSION
DISTRIBUTION
ENRICHMENT
LEAKS
POISONING
POWER
REACTOR TECHNOLOGY
REACTORS
STAINLESS STEELS
TEMPERATURE
TESTING
TUBES
URANIUM 235
VIBRATIONS
WEAR
ZONES