Storage Code TABLE OF CONTENTS STORAGE CODE pursuant to Article 12, paragraph 7, of Legislative Decree 23 May 2000, n. 164/00 as approved by the Authority for Electricity Gas and Water with resolution n. 220/06 and subsequent amendments and additions Storage Code STOGIT Rev. 2018 - I Approved by the Authority for Electricity Gas and Water with resolution 15/03/2018, 156/2018/R/gas This document is not binding and is provided by Stogit exclusively for information purposes. The Italian documents being the sole and unique legally valid reference and in any case prevailing over the translated version. Stogit will provide updates of the translation at any time as deemed necessary, also to improve and/or adjust the quality and/or content of the translation submitted. Storage Code TABLE OF CONTENTS TABLE OF CONTENTS GLOSSARY .................................................................................................................................. XII INTRODUCTION ...................................................................................................................... XVIII INFORMATION .......................................................................................................................... XIX 1 THE LEGISLATIVE CONTEXT ......................................................................................... 1 1.1 European Union Legislation ........................................................................................................... 1 1.2 Domestic Legislation ....................................................................................................................... 2 1.2.1 Legislative Decree 164/00 .................................................................................................................. 2 1.2.2 Law 239/04 ......................................................................................................................................... 4 1.2.3 Legislative Decree 130/10 .................................................................................................................. 4 1.2.4 Authority resolutions ........................................................................................................................... 4 1.2.5 Other legislative provisions ................................................................................................................ 7 2 DESCRIPTION OF THE STORAGE FACILITIES AND THEIR MANAGEMENT ............ 11 2.1 General description of the Storage Service ................................................................................. 11 2.1.1 Storage reservoirs ............................................................................................................................ 12 2.1.2 Wells ................................................................................................................................................. 14 2.1.3 Connection flow-lines ....................................................................................................................... 15 2.1.4 Compression stations ....................................................................................................................... 15 2.1.5 Treatment plants .............................................................................................................................. 15 2.1.6 Dispatching ....................................................................................................................................... 16 2.2 Storage System Performance, technical and managerial constraints and their determination ......................................................................................................................................................... 16 2.2.1 Definitions ......................................................................................................................................... 17 2.2.2 Technical and managerial constraints and their methods of determination ..................................... 17 2.3 From service levels to Capacities ................................................................................................ 22 2.3.1 Capacity for the Strategic Storage Service ...................................................................................... 23 2.3.2 Capacities for the Hydrocarbon Storage Service ............................................................................. 23 2.3.3 Capacities for the Balancing Service ............................................................................................... 23 2.3.4 Capacity for the Multi-year Storage service ..................................................................................... 24 2.3.5 [Removed with update of the Storage Code Rev. 2018 – I] ........................................................... 24 2.3.6 [Removed with update of the Storage Code, Rev. 2016 – III] ......................................................... 24 2.3.7 Capacity for the peak Modulation Service........................................................................................ 24 2.3.7.1 Capacity for the peak Modulation Service at the beginning of the Thermal Year ............................. 24 2.3.7.2 Capacity for the peak Modulation Service during the course of the Thermal Year .......................... 25 2.3.8 Capacity for the flat Modulation Service ........................................................................................... 26 2.3.8.1 Capacity for the flat Modulation Service at the beginning of the Thermal Year ................................ 26 2.3.8.2 Capacity for the Flat Modulation Service during the course of the Thermal Year ............................ 27 2.3.9 Short-Term Continuous Capacity ..................................................................................................... 27 2.3.10 Capacity for the Fast-cycle service .................................................................................................. 29 2.3.13 [Removed with the update of the Storage Code Rev. 2015 – I] ...................................................... 30 2.3.14 Additional Withdrawal Capacity as per Resolution 353/2013/R/gas ................................................ 30 2.3.15 Volume bands and Capacity Adjustment Factors ............................................................................ 31 2.4 Operational management of the Storage Service ....................................................................... 32 Storage Code TABLE OF CONTENTS 2.4.1 Operating activity: dispatching ......................................................................................................... 32 2.4.2 Tools available to dispatching .......................................................................................................... 33 2.5 Information available on the Internet site .................................................................................... 36 2.5.1 Description of the Storage Service ................................................................................................... 36 2.5.2 Technical Characteristics of the Storage Service ............................................................................ 37 2.5.3 Capacities and Performance provided by the Storage Service ....................................................... 37 3 DESCRIPTION OF THE SERVICES ............................................................................... 38 3.1 Introduction .................................................................................................................................... 38 3.2 Basic Services ................................................................................................................................ 38 3.2.1 The Hydrocarbon Storage Service ................................................................................................... 38 3.2.2 [Removed with the update of the Storage Code Rev. 2013 – II] ..................................................... 39 3.2.3 Balancing Service ............................................................................................................................. 39 3.2.4 Multi-year Storage Service ............................................................................................................... 40 3.2.4.1 Conversion of the services associated with the Withdrawal capacity of the Multi-year service ....... 40 3.2.5 [Removed in update of Storage code rev. 2018 – I] ........................................................................ 41 3.2.6 The peak Modulation Service ........................................................................................................... 41 3.2.7 Flat Modulation Service .................................................................................................................... 42 3.2.7.1 Converting the services associated with the Withdrawal Capacity of the Flat modulation Service .. 43 3.2.8 Fast-cycle service ............................................................................................................................. 44 3.2.9 Flexibility services ............................................................................................................................ 44 3.2.10 [Removed with update of the Storage Code Rev. 2016 – III] .......................................................... 44 3.2.11 [Removed with update of the Storage Code Rev. 2016 – III] .........................................................