Session: 09-05-01 integrity, threats, and risks for H2 pipelines

Paper Number: 133512

133512 - Quantitative Risk Assessment for Residential Hydrogen Supply Trailer With 100% Purity 

Abstract: 

ATCO Gas & Pipelines plans to deliver 100% gaseous hydrogen to a residential dwelling in Alberta through a temporary supply trailer in 2024. This document introduces a quantitative risk assessment methodology designed for this specific application. The assessment systematically evaluates potential threats arising from equipment failure, improper operational procedures, vandalism, and adverse weather conditions. Additionally, it conducts a thorough analysis of the consequences ensuing from the release of hydrogen, both in the presence and absence of ignition.

 

The assessment, characterized by its comparative nature, draws a parallel between the risks associated with failures of hydrogen and methane gas trailers. This approach provides a comprehensive understanding of the potential hazards inherent in the operational context of gas supply.

 

This residence, to be used as a show-home, will utilize pure hydrogen for space heating and hot water purposes and will service as a proof-of-concept demonstration to the general public, regulators, and industry that hydrogen for residential heating is a viable decarbonization option even in the extreme temperatures of Alberta. Notably, the unique aspect of this project lies in the short-term supply approach, employing a supply trailer containing approximately 3000 liters of hydrogen under a maximum operating pressure of 3,650 psi. Although the equipment employed for this endeavor is conventional for natural gas operations, its pure hydrogen application and installation site deviate from the norm. Additionally, threats linked to hydrogen storage have traditionally been confined to industrial settings, where exposure concerns differ. The primary focus of this paper pertains to the vulnerabilities to which the trailer is exposed and the subsequent risk it imposes upon the surrounding residential development. The creation of presentation materials to accurately convey these risks will be an important deliverable of these analysis. Activities involving the trailer's movement or refueling are specifically excluded from this analysis.

 

Numerous companies in the natural gas industry are currently investigating the potential of hydrogen as an alternative or supplemental fuel for domestic heating and cooking. They are examining the feasibility of blending hydrogen up to 20% with natural gas, as well as the application of 100% pure hydrogen. To facilitate a smooth and safe transition from natural gas to hydrogen, it is key to thoroughly understand the risks associated with delivering hydrogen to residential areas, homes, and surrounding communities. Conducting detailed quantitative risk assessments is an important step in this process, as it helps in identifying and mitigating potential hazards linked to the use of hydrogen in these settings. This comprehensive approach ensures that the adoption of hydrogen as a residential fuel is both safe and efficient.

Presenting Author: Tyler Klashinsky Dynamic Risk

Presenting Author Biography: As the Manager of Engineering Assessments Tyler advises Dynamic Risk clients in the development and implementation of systems to ensure their pipeline network is safe, reliable, sustainable and optimized. He also develops innovative engineering approaches and solutions, supports engineering and Risk Management projects and provides guidance to team members and clients in integrity activity scoping, maintenance planning and overall Risk Management planning.

Authors:

Tyler Klashinsky Dynamic Risk
Gary Yoho Dynamic Risk Assessment Systems
Jacqueline Fusco ATCO Gas and Pipelines
Eduardo Munoz Dynamic Risk
Seyed Hamed Fateminia Dynamic Risk
Jeremy Fontenault RPS North America
Tara Franey RPS North America