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| Reference Number | NIA_CAD0096 | |
| Title | Great Britain Hydrogen Distribution QRA | |
| Status | Completed | |
| Energy Categories | Hydrogen and Fuel Cells (Hydrogen, Other infrastructure and systems R&D) 100%; | |
| Research Types | Applied Research and Development 100% | |
| Science and Technology Fields | SOCIAL SCIENCES (Business and Management Studies) 80%; ENGINEERING AND TECHNOLOGY (Mechanical, Aeronautical and Manufacturing Engineering) 20%; |
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| UKERC Cross Cutting Characterisation | Not Cross-cutting 100% | |
| Principal Investigator |
Project Contact No email address given Cadent Gas |
|
| Award Type | Network Innovation Allowance | |
| Funding Source | Ofgem | |
| Start Date | 01 October 2023 | |
| End Date | 30 June 2024 | |
| Duration | ENA months | |
| Total Grant Value | £356,025 | |
| Industrial Sectors | Energy | |
| Region | London | |
| Programme | Network Innovation Allowance | |
| Investigators | Principal Investigator | Project Contact , Cadent Gas (99.996%) |
| Other Investigator | Project Contact , Cadent Eastern (0.001%) Project Contact , Cadent North London (0.001%) Project Contact , Cadent North West (0.001%) Project Contact , Cadent West Midlands (0.001%) |
|
| Industrial Collaborator | Project Contact , Cadent Gas (0.000%) |
|
| Web Site | https://smarter.energynetworks.org/projects/NIA_CAD0096 |
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| Objectives | It is proposed that this project will build upon the previous similar projects and iterations of the QRA and so utilise the same CONIFER model, developed by DNV.The project will cover the following areas:- Updates to the CONIFER model, following HSE comments on the QRA work undertaken for H21 and Multiple QRA"s- All necessary sensitivity analysis.- Updates to the CONIFER model to address latest industry and evidence findings.- Review of wider gas industry projects and their findings.- Modelling of non-domestic buildings and Complex Distribution Systems (CDS) (such as Schools and Hospitals)- Updated risk calculations- Analysis of risk mitigationThis will include the following deliverables:- HSE ERG reviews and comments tracking spreadsheet- Two risk prediction outputs (one preliminary result part way through the project, and second iteration at the end of the project).- Formal report on the updates made to the CONIFER model- Formal report on the outputs of the QRA and its resultsContinued communication with critical project partners plus HSE and DESNZ representatives. This project covers the Great Britain natural gas distribution system up to but excluding LTS. Typically, a distribution system would be limited to the natural gas distribution network down to the ECV, but this project will make use of the work carried out by DNV, as part of the End User Safety Evidence (EUSE) programme, and also include downstream of the ECV. This means governors on the distribution network, distribution mains (up to 7 barg operating pressure), services to end users, and end user installations (meters, pipework inside buildings and appliances), are in scope. Mains and services owned by the Independent Gas Transporters (IGTs) will be included in the assessment if sufficient information can be supplied to the project. Though it is anticipated that any outputs will have some application across the board, subject to a review of applicability of assumptions used by the project. 1. Review of historical data, from DNV"s incident investigation team and from the Gas Distribution Networks (GDNs), if available. This output will:• Help define any differences in methodology between gas leaks in typical houses and in other types of buildings.• Improve the representation of Great Britain (which is currently based on a detailed analysis of information provided by Northern Gas Networks, but "scaled up" to Great Britain using high level data of pipe lengths and numbers of customers etc.).• Improve the robustness of failure frequencies and hole size distributions applied downstream of the ECV.2. Improve the model for unconfined hydrogen explosions outdoors, if further experimental data becomes available.3. Include diffusion effects in the gas accumulation modelling within buildings.4. Review the modelling of gas accumulation in large rooms. This includes open plan houses and rooms in non-domestic buildings, which often have larger floor areas but only slightly higher ceilings, which changes the aspect ratio of the room.5. Review the behaviour of people in large buildings. This includes the ability to detect gas, reporting of the presence of gas, and subsequent response such as evacuation and closing the Emergency Control Valve.6. Review and incorporate outputs from all relevant gas industry research projects, and update CONIFER, where necessary.7. Undertake work required to model larger and more complex buildings. In particular, the numbers and types of these buildings will need to be determined, and a process developed to quantify the associated risks across Great Britain. In addition, sites such as schools and hospitals often include multiple buildings that need to be included in the risk calculations. (Note: The detailed analysis of domestic Multi-Occupancy Buildings (MOBs) is not included in this scope of this contract).8. Risk predictions will be carried out for two cases,• A natural gas distribution network base case, and,• A hydrogen distribution network as it is expected to be in 2032, but without additional risk mitigation measures beyond those already in place. This will include changes that will be made before that time regardless of conversion to hydrogen, such as planned metallic mains replacement. It will also include changes that must be made in order to operate a hydrogen network, such as increased operating pressures and the replacement of end user appliances. | |
| Abstract | This project will produce the Quantitative Risk Assessment (QRA) to cover hydrogen distribution and use across Great Britain. This work builds on DNV"s previous work as part of the H21 project, where the risk across Great Britain was quantified for hydrogen use in houses. It also makes use of work carried out by DNV as part of the End Use Safety Evidence (EUSE) programme, to investigate the risks posed by leaks in different locations within a house, and within small non-domestic buildings. In particular, the CONIFER risk assessment package will be used in this QRA. | |
| Data | No related datasets |
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| Projects | No related projects |
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| Publications | No related publications |
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| Added to Database | 02/10/24 | |
