TRUARC RETAINING RING FAILURE INVESTIGATION
Technical Report
·
OSTI ID:4823188
An investigation was made to establish the mechanism of failure of Truarc rings used to retain the inlet and outlet nozzle assemblies of the 100-K reactors and to determine suitable courses of corrective action. Approximately 75% of the nozzle flange plate retaining rings presently installed on the front face of the K Reactors have at least one radial crack which will allow a complete separation of the ring. Although oxidized and pitted, approximately 93% of the original thickness of the ring remains. The retaining capacity of the ring and groove as designed is limited by the strength of the groove. In short-term tests of load capacity, the rings were deformed but intact after the grooves had failed. An analysis of rings that had cracked in service indicated that the rings had absorbed a large amount of hydrogen, and that failure was due to hydrogeninduced static fntigue. Proposed modifications to design are outlined. (M.C.G.)
- Research Organization:
- General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
- DOE Contract Number:
- AT(45-1)-1350
- NSA Number:
- NSA-16-026612
- OSTI ID:
- 4823188
- Report Number(s):
- HW-73643
- Country of Publication:
- United States
- Language:
- English
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