Issue 53

S. Kirin et alii, Frattura ed Integrità Strutturale, 53 (2020) 345-352; DOI: 10.3221/IGF-ESIS.53.27 346 This is especially important when it comes to the proof testing, now scheduled for 2022, since it has been shown that overpressure can cause significant damage and bring no benefit, [3]. Therefore, the basic aim of this paper is to make risk based analysis of the penstock structural integrity with focus of overpressure effect. Toward this aim, a simple engineering tool will be used to estimate probability, [4-10], and simple reasoning will be used to estimate consequence, [7, 11], so that risk will be evaluated as the product of these two. This approach is also adopted in the scope of ESIS TC12 activities, [12]. Figure 1: Disposition of penstock (upper and lower pipeline) “Bajina Bašta”. Figure 2: The full-scale model: L-Longitudinal, C-Circular; MAW – shielded manual arc welding; SAW-submerged arc welding