PSI - Issue 60

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

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Figure 4: Schematic details of pressure tube spool along with end-fitting flanges and calandria tube for the burst tests

Pressure tube spools charged with varying hydrogen between 60 to 200 wppm were used for the burst test studies. Few specimens were subjected to stress re-orientation treatment to form radial hydrides. In the second set of experiments, micro cracks were initiated at the notch locations by employing sharp knife and formation of nodules using Hydrochloric Acid (HCl) (Nouduru, et al., 2021). Test details of various burst test experiments are summarized in Table 1. Table 1: Test details of burst test experiments S.No. Test detail Hydrogen/Hydrides A1. Four nos. of part through wall 2.5 mm deep and100 mm length, 90° apart OD notches on Zr-2.5%Nb PT spool As manufactured

A2.

Four nos. of part through wall 2.5 mm deep and100 mm length, 90° apart OD notches on Zr-2.5%Nb PT spool Four nos. of part through wall 2.5 mm deep and100 mm length, 90° apart OD notches on Zr-2.5%Nb PT spool Four nos. of part through wall 2.5 mm deep and100 mm length, 90° apart OD notches on Zr-2.5%Nb PT spool Four nos. of part through wall 2.5 mm deep and100 mm length, 90° apart OD notches on Zr-2.5%Nb PT spool, sharpening of notches, HCl environment to OD surface for nodule initiation

Charged with 60-80 wppm of hydrogen, circumferential hydrides Charged with 60-80 wppm of hydrogen, radial hydrides Charged with 200 wppm of hydrogen, mixed hydrides Charged with 200 wppm of hydrogen, radial hydrides

A3.

A4.

A5.