PSI - Issue 2_A

3568 Kazantsev A.G. et al. / Procedia Structural Integrity 2 (2016) 3562–3568 Author name / Structural Integrity Procedia 00 (2016) 000–000 Helium inlet sample was tested continuously for about two days with maintaining the required level of liquid nitrogen and digital registration main parameters of loading - force, temperature, nominal strain. Visual control, leak testing X-ray and liquid penetration inspections were performed after passing the given base test 30,000 cycles. Helium gas was injected in the inlet sample under a pressure of 3.0 MPa for the leak testing. Exposure during 12 hours showed no pressure drop. It indicates to conservation leak tightness of the helium inlet. Defects were not found also by other control methods. Thereby reliability of the adopted welding technology was

confirmed. References

MR 125-02-95, 1995. Rules for compiling design schemes and determination of parameters loading of structural elements with the identified defects. TSNIITMASH, Moscow, pp. 24. Sa, J.W., Kim, H.K., Choi, C.H., Kim, H.T., Hong, K.H., Park, H.K., Bak, J.S., Lee, K.W., Ha, E.T., 2005. Mechanical characteristics of austenitic stainless steel 316LN weldments at cryogenic temperature. Proceeding of Twenty-First IEEE/NPS Symposium on Fussion Engineering, Knoville, Tennessee USA, 78-83.