Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2019-06-30 — MI
Operator
Dte Gas Company
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$97,218
Incident datetime
2019-06-30 10:20
Report number
Location
MI
Narrative
A verbal notification regarding a leak on the 16' loreed-ludington transmission line for dte gas was made to the mpsc and nrc. The leak was found by a landowner and the dte crew was dispatched at 10:20 pm on 6/30/2019. Dte gas lowered the pressure of the line as of 12:18 am on 7/1/2019 and pressure control procedure and a repair plan are being developed. Approximately 5.5 feet section was replaced and the pipe section is undergoing a failure investigation by a third party laboratory. Mpsc, jim johnson, was notified at 12:30 am and we had a follow-up discussion at approximately 12:53 am. The nrc was notified at 12:28 am and the incident number is 1250615. The line was returned to service on 7/4/2019. Kiefner performed an investigation of the cause of the leak. The report was dated august 29, 2019. The summary and conclusion of the report stated "the leak that occurred on the loreed-ludington pipeline in the mlv 4-5 valve section on june 30, 2019 was likely caused by corrosion which thinned the pipe wall thickness to the point that the remaining ligament was unable to support the stress induced by the internal pressure. The failure of the pipe wall was by ductile tearing and the appearance of a crack-like feature was caused by the localized necking of the material just prior to tearing. An area of coating damage and disbondment, which caused cathodic shielding of the pipe material, likely enabled the corrosion to occur. The presence of a two part full-encirclement swamp weight over the leak location likely contributed to the conditions which would be necessary for disbanded coating to shield the pipe material. The type of corrosion that occurred at this location can be described as 'under deposit acid attack.' however, the exact cause of the corrosion was not identified. An analysis of the corrosion products for the presence of bacteria found a low presence of common bacteria associated with pipeline corrosion. Part d7.D estimated other costs desciption: lumped cost of fleet, facility, travel/mileage, and hotel costs for everyone that was deployed on site for the week of the incident.
Detailed record list
Report Received Date
2019-07-25 00:00:00
Iyear
2019
Report Number
20190085
Supplemental Number
32977
Report Type
Supplemental Final
Operator Id
12408
Name
Dte Gas Company
Operator Street Address
1 Energy Plaza
Operator City Name
Detroit
Operator State Abbreviation
MI
Operator Postal Code
48226
Local Datetime
2019-06-30 10:20:00
Location Latitude
43.957778
Location Longitude
-86.186525
Nrc Rpt Num
1250615
Nrc Rpt Datetime
2019-07-01 12:28:00
Commodity Released Type
Natural Gas
Unintentional Release
2186
Intentional Release
2227
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2019-07-01 12:18:00
Restart Datetime
2019-07-04 12:25:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2019-06-30 10:20:00
On Site Datetime
2019-06-30 10:20:00
On Off Shore
Onshore
Onshore State Abbreviation
Mi
Onshore Postal Code
49405
Onshore City Name
Custer
Onshore County Name
Mason
Designated Location
Milepost
Designated Name
Mlv 4-5
Pipe Fac Name
Loreed-Ludington Pipeline (16 Inch)
Segment Name
Loreed-Ludington Pipeline
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
72
Crossing
Yes
Road Crossing Ind
Yes
Road Type
Uncased
Water Crossing Ind
Yes
Water Type
Uncased
Water Name
Hatting Creek
Water Depth
6
Water Subtype
Shoreline/bank/marsh Crossing
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
16
Pipe Wall Thickness
0.25
Pipe Smys
1625
Pipe Specification
X52
Pipe Seam Type
Longitudinal Erw - High Frequency
Pipe Manufacturer
Stupp
Pipe Coating Type
Other
Pipe Coating Details
Trenton Wax Coating
Installation Year
1968
Manufactured Year
1968
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Crack
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
334
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
13116
Est Cost Intentional Release
13362
Est Cost Prop Damage
97218
Est Cost Emergency
37985
Est Cost Other
27914
Est Cost Other Details
See Part H For Description
Prpty
189595
Accident Psig
495
Mop Psig
913
Mop Cfr Section
192.619(C)
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
Yes
Exceed Restriction Ind
No
Phmsa Restriction Ind
Not Mandated
Upstream Valve Type Ind
Remotely Controlled
Downstream Valve Type Ind
Remotely Controlled
Length Segment Isolated
13
Internal Inspection Ind
No
Other Inspection Ind
Yes
Internal Inspection Details
Pig Traps Were Not Usable As Configured.
Operation Complications Ind
Yes
Other Complications Ind
Yes
Inspect Comp Details
Design Of Pig Traps
Pipeline Function
Transmission System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Accident Identifier
Notification From Public
Investigation Status
No, the operator did not find that an investigation of the controller(s) actions or control room issues was necessary due to: (provide an explanation for why the operator did not investigate)
Investigation Status Details
The volume was not significant enough to show any noticeable pressure decreases or flow increases in gas control.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
External Corrosion
Internal External
External Corrosion
Visual Exam Results
Localized Pitting
Other Corrosion Ind
Yes
Corrosion Type Details
Kiefner Performed An Investigation Of The Cause Of The Leak. See Part H For The Summary And Conclusions.
Field Exam Basis Ind
Yes
Metallurgical Basis Ind
Yes
Underground Location
Yes
Under Cathodic Protection Ind
Yes
Cathodic Pro Start Year
1968
Shielding Evident
Yes
Cathodic Survey Type
Yes
Cp Annual Survey Ind
Yes
Cp Annual Survey Year
2018
Prior Damage
Yes
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
C***** J* T****
Preparer Title
Supervisor Of Codes And Standards
Preparer Email
C***********@d********.com
Preparer Telephone
313-346-2896
Authorizer Name
C***** T****
Authorizer Title
Supervisor Of Codes And Standards
Authorizer Telephone
313-346-2896
Authorizer Email
C***********@d*******.com
Narrative
A verbal notification regarding a leak on the 16' loreed-ludington transmission line for dte gas was made to the mpsc and nrc. The leak was found by a landowner and the dte crew was dispatched at 10:20 pm on 6/30/2019. Dte gas lowered the pressure of the line as of 12:18 am on 7/1/2019 and pressure control procedure and a repair plan are being developed. Approximately 5.5 feet section was replaced and the pipe section is undergoing a failure investigation by a third party laboratory. Mpsc, jim johnson, was notified at 12:30 am and we had a follow-up discussion at approximately 12:53 am. The nrc was notified at 12:28 am and the incident number is 1250615. The line was returned to service on 7/4/2019. Kiefner performed an investigation of the cause of the leak. The report was dated august 29, 2019. The summary and conclusion of the report stated "the leak that occurred on the loreed-ludington pipeline in the mlv 4-5 valve section on june 30, 2019 was likely caused by corrosion which thinned the pipe wall thickness to the point that the remaining ligament was unable to support the stress induced by the internal pressure. The failure of the pipe wall was by ductile tearing and the appearance of a crack-like feature was caused by the localized necking of the material just prior to tearing. An area of coating damage and disbondment, which caused cathodic shielding of the pipe material, likely enabled the corrosion to occur. The presence of a two part full-encirclement swamp weight over the leak location likely contributed to the conditions which would be necessary for disbanded coating to shield the pipe material. The type of corrosion that occurred at this location can be described as 'under deposit acid attack.' however, the exact cause of the corrosion was not identified. An analysis of the corrosion products for the presence of bacteria found a low presence of common bacteria associated with pipeline corrosion. Part d7.D estimated other costs desciption: lumped cost of fleet, facility, travel/mileage, and hotel costs for everyone that was deployed on site for the week of the incident.
| Report Received Date | 2019-07-25 00:00:00 |
|---|---|
| Iyear | 2019 |
| Report Number | 20190085 |
| Supplemental Number | 32977 |
| Report Type | Supplemental Final |
| Operator Id | 12408 PHMSA Enforcement |
| Name | Dte Gas Company |
| Operator Street Address | 1 Energy Plaza |
| Operator City Name | Detroit |
| Operator State Abbreviation | MI |
| Operator Postal Code | 48226 |
| Local Datetime | 2019-06-30 10:20:00 |
| Location Latitude | 43.957778 Google Maps OpenStreetMap |
| Location Longitude | -86.186525 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1250615 NRC Report How to search |
| Nrc Rpt Datetime | 2019-07-01 12:28:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 2186 |
| Intentional Release | 2227 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2019-07-01 12:18:00 |
| Restart Datetime | 2019-07-04 12:25:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2019-06-30 10:20:00 |
| On Site Datetime | 2019-06-30 10:20:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Mi |
| Onshore Postal Code | 49405 |
| Onshore City Name | Custer |
| Onshore County Name | Mason |
| Designated Location | Milepost |
| Designated Name | Mlv 4-5 |
| Pipe Fac Name | Loreed-Ludington Pipeline (16 Inch) |
| Segment Name | Loreed-Ludington Pipeline |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 72 |
| Crossing | Yes |
| Road Crossing Ind | Yes |
| Road Type | Uncased |
| Water Crossing Ind | Yes |
| Water Type | Uncased |
| Water Name | Hatting Creek |
| Water Depth | 6 |
| Water Subtype | Shoreline/bank/marsh Crossing |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 16 |
| Pipe Wall Thickness | 0.25 |
| Pipe Smys | 1625 |
| Pipe Specification | X52 |
| Pipe Seam Type | Longitudinal Erw - High Frequency |
| Pipe Manufacturer | Stupp |
| Pipe Coating Type | Other |
| Pipe Coating Details | Trenton Wax Coating |
| Installation Year | 1968 |
| Manufactured Year | 1968 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Crack |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 334 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 13116 |
| Est Cost Intentional Release | 13362 |
| Est Cost Prop Damage | 97218 |
| Est Cost Emergency | 37985 |
| Est Cost Other | 27914 |
| Est Cost Other Details | See Part H For Description |
| Prpty | 189595 |
| Accident Psig | 495 |
| Mop Psig | 913 |
| Mop Cfr Section | 192.619(C) View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | Yes |
| Exceed Restriction Ind | No |
| Phmsa Restriction Ind | Not Mandated |
| Upstream Valve Type Ind | Remotely Controlled |
| Downstream Valve Type Ind | Remotely Controlled |
| Length Segment Isolated | 13 |
| Internal Inspection Ind | No |
| Other Inspection Ind | Yes |
| Internal Inspection Details | Pig Traps Were Not Usable As Configured. |
| Operation Complications Ind | Yes |
| Other Complications Ind | Yes |
| Inspect Comp Details | Design Of Pig Traps |
| Pipeline Function | Transmission System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Accident Identifier | Notification From Public |
| Investigation Status | No, the operator did not find that an investigation of the controller(s) actions or control room issues was necessary due to: (provide an explanation for why the operator did not investigate) |
| Investigation Status Details | The volume was not significant enough to show any noticeable pressure decreases or flow increases in gas control. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | External Corrosion |
| Internal External | External Corrosion |
| Visual Exam Results | Localized Pitting |
| Other Corrosion Ind | Yes |
| Corrosion Type Details | Kiefner Performed An Investigation Of The Cause Of The Leak. See Part H For The Summary And Conclusions. |
| Field Exam Basis Ind | Yes |
| Metallurgical Basis Ind | Yes |
| Underground Location | Yes |
| Under Cathodic Protection Ind | Yes |
| Cathodic Pro Start Year | 1968 |
| Shielding Evident | Yes |
| Cathodic Survey Type | Yes |
| Cp Annual Survey Ind | Yes |
| Cp Annual Survey Year | 2018 |
| Prior Damage | Yes |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | C***** J* T**** |
| Preparer Title | Supervisor Of Codes And Standards |
| Preparer Email | C***********@d********.com |
| Preparer Telephone | 313-346-2896 |
| Authorizer Name | C***** T**** |
| Authorizer Title | Supervisor Of Codes And Standards |
| Authorizer Telephone | 313-346-2896 |
| Authorizer Email | C***********@d*******.com |
| Narrative | A verbal notification regarding a leak on the 16' loreed-ludington transmission line for dte gas was made to the mpsc and nrc. The leak was found by a landowner and the dte crew was dispatched at 10:20 pm on 6/30/2019. Dte gas lowered the pressure of the line as of 12:18 am on 7/1/2019 and pressure control procedure and a repair plan are being developed. Approximately 5.5 feet section was replaced and the pipe section is undergoing a failure investigation by a third party laboratory. Mpsc, jim johnson, was notified at 12:30 am and we had a follow-up discussion at approximately 12:53 am. The nrc was notified at 12:28 am and the incident number is 1250615. The line was returned to service on 7/4/2019. Kiefner performed an investigation of the cause of the leak. The report was dated august 29, 2019. The summary and conclusion of the report stated "the leak that occurred on the loreed-ludington pipeline in the mlv 4-5 valve section on june 30, 2019 was likely caused by corrosion which thinned the pipe wall thickness to the point that the remaining ligament was unable to support the stress induced by the internal pressure. The failure of the pipe wall was by ductile tearing and the appearance of a crack-like feature was caused by the localized necking of the material just prior to tearing. An area of coating damage and disbondment, which caused cathodic shielding of the pipe material, likely enabled the corrosion to occur. The presence of a two part full-encirclement swamp weight over the leak location likely contributed to the conditions which would be necessary for disbanded coating to shield the pipe material. The type of corrosion that occurred at this location can be described as 'under deposit acid attack.' however, the exact cause of the corrosion was not identified. An analysis of the corrosion products for the presence of bacteria found a low presence of common bacteria associated with pipeline corrosion. Part d7.D estimated other costs desciption: lumped cost of fleet, facility, travel/mileage, and hotel costs for everyone that was deployed on site for the week of the incident. |
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