PSI - Issue 60

Rishi K Sharma et al. / Procedia Structural Integrity 60 (2024) 264–276 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

272

9

Figure 5: Summary of burst test experiments on Zr-2.5%Nb pressure tubes at R&D center, Tarapur.

PT Burst Open Pressure (bar)

100 120 140 160 180

171

140

98

0 20 40 60 80

92

As received

Circumferential hydrides (80 wppm)

Radial hydrides (80 wppm)

Mixed hydrides (200 wppm)

Figure 6: Pressure tube burst open pressure for burst tests at R&D center, Tarapur

The initial notch was found to be extended to a greater length as shown in Figure 7-9. It was observed that one of the 4 part through OD axial cracks at 90° apart opened during all the test experiments as mentioned above. No crack initiation at existing machined notch locations was observed.