Updates on CA Pipeline Safety Program

Transcription

1 Updates on CA Pipeline Safety Program Kenneth Bruno Program Manager Gas Safety Branch Safety and Enforcement Division California Public Utilities Commission 1

2 Mission To ensure that intrastate natural gas and liquefied petroleum gas (LPG) pipeline systems are designed, constructed, operated, and maintained according to safety standards set by the CPUC and the federal government 2

3 Pipeline Safety Team 30 Gas Safety Engineers 1 Damage Prevention Expert 6 Supervisory 2 Administrative 3

4 Jurisdictional Metrics Distribution: ,317 miles (Main) 92,996 miles (Services) 1 st in the Nation (TX, IL, OH, MI) 4

5 Jurisdictional Metrics Transmission: ,391 Miles 5 th behind (TX, LA, KS, OK) HCA 2,838 Miles (~27%) 5

6 Operators 11 NG Operators 12 Storage Fields 2,479 Master Meters 655 LPG 6

7 Operators Bare Steel: 1.6% CP Steel: 36.4% Plastic 55% Other 7% 7

8 Inspection Types O&M TIMP, DIMP, OQ Emergency Management D&A, CRM, PAP, Damage Prevention Construction 8

9 9 CPUC Safety Assurance

10 10 CPUC Safety Assurance

11 11 CPUC Safety Assurance

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13 13 Inspection Types

14 Large Scale Incidents 1. First Responders 2. Make Safe Stop the flow of gas and conduct a leak migration survey 3. Set up a perimeter and stay off the scene until CPUC completes its investigation 4. Chain of Custody Procedures 14

15 Incidents Reporting Requirements per GO-112F 151 incidents through July 31, 2017 Reporting Requirements per 49 CFR incidents through July 31,

16 16 Incident by Category

17 2016 Enforcement Four Citations Issued and CPUC-OII for a total of $44,376,000 Distribution Facilities Records Keeping Unqualified Personnel Atmospheric corrosion inspections & Cross bores Failure to take prompt remedial action to correct cathodic protection deficiencies 17

18 September 9, 2010 Pipeline Failure of 30 Transmission Line in San Bruno, CA 8 Fatalities, numerous injuries Pipeline had MAOP established under 49 CFR C NTSB Accident Report identified exemptions for pre-code pipelines from pressure testing as a contributing factor to the failure 18

19 Safety Assurance Actions Post San Bruno PUC Code 958 Required Intrastate NG Transmission Operators to submit a plan to either Pressure Test or Replace all segments that were not pressure tested or that lack sufficient records of pressure testing 19

20 Progress Update of PU Code 958 CA NG Transmission Pressure Tested: ~875 Miles, 12 Failures Replaced: ~190 Miles Remaining Transmission Lines to be either Pressure Tested or Replaced: ~3,027 Miles Estimated time to completion: SouthWest Gas: Completed PG&E: SoCalGas and SDG&E: 2036

21 NG Transmission - Safety Measures Average Cost of Hydrostatic Test Range: $MM New Automated Valves (RCV and ASV) 268, 267$MM (PG&E) 131, 151$MM (Sempra) 21

22 Goals Better technology on Inspections Process Owners for Specialized Areas Continuous Improvement in Pipeline Safety Assurance and Program Performance Regionally based Inspectors 22

23 Aliso Canyon SS-25 Failure occurred on or around October 23, 2015 October 24 th : 1 st Kill Attempt After several additional failed attempts, well was eventually controlled on February 12, 2016 via relief well 23

24 Aliso Canyon CPUC is conducting an active investigation in SS-25 failure PU Code 315 and 701 Root Cause Analysis Blade Energy Partners Department of Conservation s DOGGR 24

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27 Tree Tubing Head Ground Line Casing Head 11-3/4 -in Casing 990 ft 2-7/8 -in TOC at 7,590 ft TOC at 8175 ft Packer = 8,486 ft 7.0 -in Casing 8,585 ft 8,749 ft Page 27

28 Tubing Extraction - Ongoing 0 Free point tubing Cut Tubing C&C Mud, POH to 1050, Circ. clear brine PU to 850, Run video camera to 1000 RIH to 1050 C&C mud, POH Log 7 Casing 1000 OSS Fault 2000 COMPLETED YSS Fault COMPLETED _4652' _4910' Pause Operations Submit Supplementary Notice for Proposed Operations above 7590 Aliso _5645' Porter Upper DA TOC B Annulus 7000' Mid DA Low DA 8000 Cap Rock Sesnon 9000 _xxxx' = OH DST TOC A Annulus 7590' 7 Casing 8585' 3 barite plugs pumped down tubing during kill attempt location and disposition unknown Run video camera ONGOING

29 29 Thank you! For Additional Information: