NPR TUBE TO NOZZLE CONNECTION AND ZIRCALOY-2 TO STAINLESS STEEL TUBE CONNECTION
Technical Report
·
OSTI ID:4265445
Zircaloy-2 tubing was successfully joined to austenitic and ferritic stainless steel tubing by fusion bonding. Tungsten inert gas welding was employed to join a flange to a pressure tube. This work was performed to help determine the design of pressure tubes of a pressure tube reactor. (auth) A polishing and etching procedure for uranium dioxide compatible with radiometallurgy and electron microscope requirements has been established. Specimens with densities in the range of 80 to 97% of theoretical are mounted in conventional mountants, ground on a lap rotating at 246 rpm with 320 grit silicon carbide wet or dry paper. After five minutes polishing under moderate pressure, specimens are similarly ground with 600 grit silicon carbidc wet or dry paper; water is used as a lubricant. Final polishing is accomplished on microcloth revolving at 246 rpm. Prior to polishing, the cloth is saturated with a 2% chromic acid solution and permitted to stand for five minutes. Linde B suspended in a 2% chromic acid solution is the abrasive. Fifteen minutes polishing under light pressure produces a satisfactory surface. After each grinding or polishing operation the specimen is washed for ten minutes in an ultrasonic eleaning bath containing alcohol, rinsed in hot water and air dried. Etching is conducted by immersion for from 5 to 11 minutes in a solution containing 60 cc H/sub 2/SO/sub 4/ and 40 cc H2/sub 2/O/sub 2/(30% at room tempera ture. (auth)
- Research Organization:
- General Electric Co. Atomic Power Equipment Dept., San Jose, Calif.
- NSA Number:
- NSA-13-013522
- OSTI ID:
- 4265445
- Report Number(s):
- GEAP-3089; R58APE13
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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