Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2022-03-06 — TX
Operator
Great Lakes Gas Transmission Limited Partnership
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$1,000
Incident datetime
2022-03-06 12:37
Report number
Location
TX
Narrative
On march 6th at 12:37 est, glgt gas control received an emergency shutdown system (esd) valve out of position alarm, at wakefield compressor station located at 400 great lakes road, wakefield, mi 49968, (46.43969, -89.83737). When the alarm was detected, a technician was dispatched to the compressor station to investigate. Upon arrival at the site at 13:50 est, the technician discovered natural gas being released to the atmosphere through the eight-inch vent stack. Immediate action was taken by verifying no emergency existed and closed the valve, which ended the release at 14:14 est. Unintentional gas loss was calculated to approximately 40.7 million cubic feet (mmcf). Investigation indicated that the system vent valve (y-01-de) failed due to a solenoid failure that holds the esd valve closed which contributed to the gas loss. Additionally, an automatic isolation valve (y-02-d) failed to completely close due to ice accumulation freezing the valve in the open position resulting in the continuing release of gas to the atmosphere through the 8-inch vent stack. Both solenoids were replaced on march 7th, 2022. The esd system has been inspected and tested according to procedures and operated correctly. The system has been placed back into full-service march 7th at 18:00 est.
Detailed record list
Report Received Date
2022-03-28 00:00:00
Iyear
2022
Report Number
20220036
Supplemental Number
36811
Report Type
Supplemental Final
Operator Id
6660
Name
Great Lakes Gas Transmission Limited Partnership
Operator Street Address
700 Louisiana Street Suite 700
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2022-03-06 13:03:00
Time Zone
Eastern
Daylight Savings Ind
No
Location Latitude
46.43969
Location Longitude
-89.83737
Nrc Rpt Num
1330379
Nrc Rpt Datetime
2022-03-08 15:21:00
Additional Nrc Report Numbers
1330544
Commodity Released Type
Natural Gas
Unintentional Release
40700
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Status When Identified
Normal Operation, Includes Pauses During Maintenance
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2022-03-06 14:14:00
Restart Datetime
2022-03-07 18:00:00
Communication State Fed Ind
No
Ignite Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2022-03-06 12:37:00
On Site Datetime
2022-03-06 13:50:00
On Off Shore
Onshore
Onshore State Abbreviation
Mi
Onshore Postal Code
49968
Onshore City Name
Wakefield
Onshore County Name
Gogebic
Designated Location
Not Applicable
Pipe Fac Name
Great Lakes Gas Transmission Limited Partnership
Segment Name
Wakefield Cs-7
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Compressor Station Equipment And Piping
Item Involved
Esd System, But Excluding Product Drain Lines And Tubing
Installation Year
Unknown
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Emergency Shut Down (Esd)
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
776
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
140822
Est Cost Intentional Release
0
Est Cost Prop Damage
1000
Est Cost Emergency
0
Est Cost Other
0
Gas Cost In Mcf
3.46
Prpty
141822
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Wildlife Impact Ind
No
Accident Psig
744
Gas Flow In Pipe In Mcf
0
Mop Psig
974
Mop Cfr Section
192.619(A)(1)
Maop Established Date
1968-03-24 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
No
Pipeline Function
Transmission System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
Yes
Scada Conf Ind
Yes
Accident Identifier
Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations)
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 operator identified the alarm and follow the procedures to initiate an investigation. Field personnel was dispatched to the site and responded to the location of the alarm.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Malfunction Of Control/relief Equipment
Eq Failure Type
Malfunction Of Control/relief Equipment
Other Control Relief Ind
Yes
Other Control Relief Details
Ice Accumulation Contributed To The Valve Failure
Additional Alarm Ind
Yes
Preparer Name
R****** P******
Preparer Title
Compliance Specialist
Preparer Email
R**************@t*******.com
Preparer Telephone
2485617803
Local Contact Name
R****** P******
Local Contact Email
R**************@t*******.com
Local Contact Telephone
2485617803
Authorizer Name
R**** S*****
Authorizer Title
Interim Manager Regulatory Compliance
Authorizer Telephone
8325702966
Authorizer Email
R***********@t*******.com
Narrative
On march 6th at 12:37 est, glgt gas control received an emergency shutdown system (esd) valve out of position alarm, at wakefield compressor station located at 400 great lakes road, wakefield, mi 49968, (46.43969, -89.83737). When the alarm was detected, a technician was dispatched to the compressor station to investigate. Upon arrival at the site at 13:50 est, the technician discovered natural gas being released to the atmosphere through the eight-inch vent stack. Immediate action was taken by verifying no emergency existed and closed the valve, which ended the release at 14:14 est. Unintentional gas loss was calculated to approximately 40.7 million cubic feet (mmcf). Investigation indicated that the system vent valve (y-01-de) failed due to a solenoid failure that holds the esd valve closed which contributed to the gas loss. Additionally, an automatic isolation valve (y-02-d) failed to completely close due to ice accumulation freezing the valve in the open position resulting in the continuing release of gas to the atmosphere through the 8-inch vent stack. Both solenoids were replaced on march 7th, 2022. The esd system has been inspected and tested according to procedures and operated correctly. The system has been placed back into full-service march 7th at 18:00 est.
| Report Received Date | 2022-03-28 00:00:00 |
|---|---|
| Iyear | 2022 |
| Report Number | 20220036 |
| Supplemental Number | 36811 |
| Report Type | Supplemental Final |
| Operator Id | 6660 PHMSA Enforcement |
| Name | Great Lakes Gas Transmission Limited Partnership |
| Operator Street Address | 700 Louisiana Street Suite 700 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2022-03-06 13:03:00 |
| Time Zone | Eastern |
| Daylight Savings Ind | No |
| Location Latitude | 46.43969 Google Maps OpenStreetMap |
| Location Longitude | -89.83737 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1330379 NRC Report How to search |
| Nrc Rpt Datetime | 2022-03-08 15:21:00 |
| Additional Nrc Report Numbers | 1330544 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 40700 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Status When Identified | Normal Operation, Includes Pauses During Maintenance |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2022-03-06 14:14:00 |
| Restart Datetime | 2022-03-07 18:00:00 |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2022-03-06 12:37:00 |
| On Site Datetime | 2022-03-06 13:50:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Mi |
| Onshore Postal Code | 49968 |
| Onshore City Name | Wakefield |
| Onshore County Name | Gogebic |
| Designated Location | Not Applicable |
| Pipe Fac Name | Great Lakes Gas Transmission Limited Partnership |
| Segment Name | Wakefield Cs-7 |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Compressor Station Equipment And Piping |
| Item Involved | Esd System, But Excluding Product Drain Lines And Tubing |
| Installation Year | Unknown |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Emergency Shut Down (Esd) |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 776 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 140822 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 1000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 3.46 |
| Prpty | 141822 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Wildlife Impact Ind | No |
| Accident Psig | 744 |
| Gas Flow In Pipe In Mcf | 0 |
| Mop Psig | 974 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 1968-03-24 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | No |
| Pipeline Function | Transmission System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | Yes |
| Scada Conf Ind | Yes |
| Accident Identifier | Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations) |
| 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 operator identified the alarm and follow the procedures to initiate an investigation. Field personnel was dispatched to the site and responded to the location of the alarm. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Malfunction Of Control/relief Equipment |
| Eq Failure Type | Malfunction Of Control/relief Equipment |
| Other Control Relief Ind | Yes |
| Other Control Relief Details | Ice Accumulation Contributed To The Valve Failure |
| Additional Alarm Ind | Yes |
| Preparer Name | R****** P****** |
| Preparer Title | Compliance Specialist |
| Preparer Email | R**************@t*******.com |
| Preparer Telephone | 2485617803 |
| Local Contact Name | R****** P****** |
| Local Contact Email | R**************@t*******.com |
| Local Contact Telephone | 2485617803 |
| Authorizer Name | R**** S***** |
| Authorizer Title | Interim Manager Regulatory Compliance |
| Authorizer Telephone | 8325702966 |
| Authorizer Email | R***********@t*******.com |
| Narrative | On march 6th at 12:37 est, glgt gas control received an emergency shutdown system (esd) valve out of position alarm, at wakefield compressor station located at 400 great lakes road, wakefield, mi 49968, (46.43969, -89.83737). When the alarm was detected, a technician was dispatched to the compressor station to investigate. Upon arrival at the site at 13:50 est, the technician discovered natural gas being released to the atmosphere through the eight-inch vent stack. Immediate action was taken by verifying no emergency existed and closed the valve, which ended the release at 14:14 est. Unintentional gas loss was calculated to approximately 40.7 million cubic feet (mmcf). Investigation indicated that the system vent valve (y-01-de) failed due to a solenoid failure that holds the esd valve closed which contributed to the gas loss. Additionally, an automatic isolation valve (y-02-d) failed to completely close due to ice accumulation freezing the valve in the open position resulting in the continuing release of gas to the atmosphere through the 8-inch vent stack. Both solenoids were replaced on march 7th, 2022. The esd system has been inspected and tested according to procedures and operated correctly. The system has been placed back into full-service march 7th at 18:00 est. |
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