Summary
Read more on ELECTRAElectrical equipment using SF6 as insulating and/or arc quenching gas has been widely used globally since the second half of last century. Despite the very long asset lifetime, it is inevitable that equipment will reach its end-of-life (EoL). This guide summarises the well-known practices and informs the EoL procedure of handling electrical equipment containing SF6 and the SF6 itself. Every step of the process is explained in detail, from the preparation to recycling or final disposal. The target is to limit the SF6 emissions in every step of the processes dealing with the disposal of equipment parts and/or the recycling of SF6 used in all equipment, reaching their EoL to the absolute bare minimum that is technically achievable. Importantly, safety must be guaranteed at every single step.
Table of content
1. Definitions for the use of the guide.
1.1. Equipment covered by this guide.
1.2. Definitions.
2. Preparation of the electrical equipment for decommissioning.
2.1. Scope of work and responsibility.
2.2. Collection of available data of the related electrical equipment.
2.3. Condition of the electrical equipment and the contained gas.
2.4. Designation of the electrical equipment or component for further actions.
2.5. Preparation of documentation of transportable units.
2.6. Required equipment and personnel for decommissioning.
2.7. Preparation of storage and shipping area.
3. Electrical equipment decommissioning procedures including recovery of SF6.
3.1. Where should the SF6 be recovered from the electrical equipment.
3.2. Gas recovery procedures.
3.3. Determination of the amount of emitted SF6.
4. Handling procedures for decommissioned switchgear following SF6 recovery.
4.1. Identification of equipment conditions.
4.2. Dismantling of external components.
4.3. Opening of SF6 evacuated compartments.
4.4. Storing switchgear for potential reuse.
4.5. Recycling and responsible disposal.
5. On-site storage of recovered (used) SF6.
5.1. Specific recommendations for SF6 mixtures.
5.2. Cylinder standards including appropriate thread profiles.
5.3. Long term storage of SF6 gas on-site.
5.4. Labelling recommendations.
6. Transport of recovered (used) SF6.
6.1. International transport rules for dangerous goods.
6.2. Packaging for used gas.
6.3. Labelling.
6.4. Transport documents for the export of recovered SF6.
7. SF6 Quality Evaluation Procedure.
7.1. General statement.
7.2. Standards.
7.3. Measurement methods for testing SF6.
7.4. Description of an example measurement with a multiple sensor measuring device.
7.5. Description of the individual test methods.
7.6. Application areas of the different measuring methods.
8. Reconditioning of SF6 for Reuse.
8.1. Review of existing processes/recommendations/specifications.
8.2. Reconditioning of the SF6 gas if the gas is contaminated with Air, CF4 or N2.
8.3. New technologies for reconditioning SF6 gas.
9. Overview of disposal procedures for SF6.
9.1. General statement.
9.2. Recommended final disposal.
9.3. Promising alternative methods.
9.4. Disposal for SF6 gas mixture.
10. Overview of current regulations to SF6 end-of-life treatment and proposals for improvements.
10.1. Actors of EoL for SF6 switchgear.
10.2. Current regulation framework for SF6.
10.3. Standards and voluntary agreement.
10.4. Issues with current regulatory framework.
10.5. Recommendations for regulators.
Appendix A. Checklists.
Appendix B. Examples of Regulatory Forms.
B.1. France - waste tracking form.
B.2. UK - waste tracking form.
Additional informations
| Publication type | Technical Brochures |
|---|---|
| Reference | 914 |
| Publication year | |
| Publisher | CIGRE |
| ISBN | 978-2-85873-619-5 |
| Study committees | |
| Working groups | JWG B3/A3.59 |
| File size | 5 MB |
| Pages number | 97 |
| Price for non member | 180 € |
| Price for member | Free |
Video
Authors
M. HYRENBACH, Convenor (DE), T. LUJIA CHEN, Secretary (UK)
A. GREEN (UK), A. LASO RUBIO (US), F. TRICHON (FR), F. ZENG (CN), G. KACHELRIESS (DE), J. STAGE (US), J. RAPP (UK), J. MANUEL INCHAUSTI SANCHO (ES), N. OTAKA (JP), P. FERNANDEZ (BR), R. KURTE (DE), S. LABERGE (CA), S. FLOOD (IE), T. DÜRR (DE), T. SCHWARZE (DE), T. UCHII (JP), U. AMMER (DE), Z. SMITH (US)
Keywords
SF6 End-of-Life Treatment, Gas Recovery, Recycling, Decommissioning, GIS, Reconditioning, Reuse, Emissions Reporting, Transport Compliance, Evacuation Methods, Decomposition Measurement, Disposal, Regulatory Compliance, Asset Management Checklists
