CURRENT STATUS AND TEST PROGRAMS FOR THE STEPPED STAVE

18/09/98


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Summary

CURRENT STATUS AND TEST PROGRAMS FOR THE STEPPED STAVE

Outlines

4th stepping stave prototypes

The current manufacturing process

Stave thermal performances

Water-ethanol binary ice mixture(I)

Water-ethanol binary ice mixture(II)

Water-methanol binary ice mixtur

Water-methanol liquid phase mixture

Stave geometry and dimensional stability

FEA model

As built Geometry (room temperature

0-15-0 stave: room temperature profile measurement

0-15-0 stave: room temperature milling distorsions

0-90-0 stave: room temperature profile measurements

0-90-0 stave: room temperature milling distorsions

Stave Transverse tilting after milling at room temperature

CTE estimation

Stave dimensional stability

0-90-0 stave max vertical cool-down dispacement

0-15-0 stave measured transverse tilting due to cool-down

0-15-0 stave cool-down twisting: locked ends

0-15-0 stave cool-down twisting: free ends

Prototype n.4: measurements .vs. calculations

0-15-0 stave cool down deflections

0-90-0 stave cool down deflections

0-90-0 omega stave FEA analysis

Stave combined cool-down+weight deflections: worst case

Stave combined cool-down+weight deflections: best case

Effect of the coolant pressure

Stave deflections due to internal pressure (-1 barr)

Stave structural integrity

Peeling tool

Peeling tests on 15mm stave samples as built

Sealing tests

Mechanical actions

Summary and conclusions

Autore:M.Olcese