PACIFIC GAS & ELECTRIC CO — Integrity Assurance Notification

MAOP RECONFIRMATION METHOD 6PG&E has developed a nondestructive examination (NDE) technology-based methodology, within the framework of §192.624(c)(6): Alternative Technologies and §192.632: Engineering Critical Assessment, to reconfirm MAOP, as an alternative to hydrostatic pressure testing. Alternatives to hydrostatic pressure testing, to reconfirm MAOP, was introduced by PHMSA within the 10/01/2019 rule, Pipeline Safety: of Gas Transmission Pipelines: MAOP Reconfirmation, Expansion of Assessment Requirements, and Other Related Amendments (Docket No. PHMSA-2011-0023). Comprehensive flaw detection NDE and materials verification NDE was carried-out on both Bradbury pipe joints. Fracture mechanics based burst pressure and fitness for service (remaining life) calculation were subsequently performed using these inputs. All probabilistic failure pressure calculations determined that failure occurs well above the 1.5 times MAOP value. Flaw growth was also not found to be possible based on normal station operations.#