Performance Test on the KAERI Designed Spacer Grids for the Advanced PWR

432

만능인장시험기

(Universal Tensile Testing Machine)

크로스헤드(Cross Head)

1

2 2 3

1. 시편가중부(Loading Bar) 2. 시편(Specimen) 3. 치구(Fixture)

Axial Slip Transverse Slip Tube

Specimen Spring Specimen

SpecimenHolder

가변측

고정측 Dimple Spring

0.0 0.2 0.4 0.6 0.8 1.0

-10 -5 0 5 10

Transverse length (µm) Z

Axial length (mm)

Wear depth (

µ m)

X Y

10 µm

434

L a s e r D i s p . S e n s o r

A c c e l e r o m e t e r S p a c e r G r i d

0.0 0.2 0.4 0.6 0.8 1.0 1.2

0 100 200 300

400 Grid Spring(Zry-4)

P (N)

δ (mm)

Doublet : 114 (N/mm) Opt.H : 124 (N/mm) Ref.A : 708 (N/mm) Ref.B : 210 (N/mm)

20 30 40 50 60 70 80 90 100 110 0

500 1000 1500 2000 2500 3000 3500

Opt.H Doublet KAFD

Comparison of wear vol. at 30 N

Slip Displacement (µm) Wear Volume (X10-6 mm3 )

0 1 2 3 4 5 6 7 8 9 10 0.0

0.5 1.0 1.5 2.0

Wear Volume (X 10-3 mm3 )

No. Cycles (X 10⁵)

Opt.H Doublet KAFD

5N -- Gap

0 1 2 3 4 5 6 7 8 9

Supporting Condition Wear Volume (X10-3 mm3 )

O p t.H R ef. B D o ub let

10 20 30 40 50 60 70 80 90 100 110 120

0.00 0.04 0.08 0.12 0.16 0.20 0.24 0.28 0.32 0.36 0.40

Displacement(mm)

Frequency(Hz)

Optimized H Doublet

436