Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2022-10-03 — OK
Operator
Transcontinental Gas Pipe Line Company
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$5,000
Incident datetime
2022-10-03 09:23
Report number
Location
OK
Narrative
While compressing in normal operations a 10-inch station blowdown unexpectedly opened without a corresponding shutdown from the emergency shutdown (esd) / emergency blowdown (ebd) systems. Operations then manually initiated an esd, however, one side-gate valve failed to close, and gas continued to release from the 10-inch blowdown. Operations then attempted to manually close the side-gate valve but were unsuccessful. Operations was able to isolate the station by closing an upstream valve located approximately six miles away, 23 minutes after the initial blowdown opened. That particular valve is out of service pending a controls specs study. Locked the isolation valve below and left it out of service.
Detailed record list
Report Received Date
2022-10-20 00:00:00
Iyear
2022
Report Number
20220111
Supplemental Number
37919
Report Type
Supplemental Final
Operator Id
19570
Name
Transcontinental Gas Pipe Line Company
Operator Street Address
One Williams Center Md 43-4
Operator City Name
Tulsa
Operator State Abbreviation
OK
Operator Postal Code
74172
Local Datetime
2022-10-03 09:46:00
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
30.743425
Location Longitude
-91.265639
Nrc Rpt Num
1348896
Nrc Rpt Datetime
2022-10-03 11:28:00
Additional Nrc Report Numbers
1349060
Commodity Released Type
Natural Gas
Unintentional Release
32000
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
2022-10-03 09:46:00
Restart Datetime
2022-10-04 20:49:00
Communication State Fed Ind
Yes
Party Initiated Communication
Operator
Initial Responder Com Datetime
2022-10-03 09:34:00
Ignite Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2022-10-03 09:23:00
On Site Datetime
2022-10-03 09:55:00
On Off Shore
Onshore
Onshore State Abbreviation
La
Onshore Postal Code
70748
Onshore City Name
Jackson
Onshore County Name
East Feliciana
Designated Location
Milepost
Designated Name
588.51
Pipe Fac Name
Compressor Station 60
Segment Name
Le5048b Blowdown Valve
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
2016
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Emergency Blowdown Valve Inadvertently Opened.
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
151
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
180480
Est Cost Intentional Release
0
Est Cost Prop Damage
5000
Est Cost Emergency
0
Est Cost Other
0
Gas Cost In Mcf
5.64
Prpty
185480
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
585
Gas Flow In Pipe In Mcf
600000
Mop Psig
800
Mop Cfr Section
192.619(A)(1)
Maop Established Date
2001-07-22 00:00:00
Maop Reversal Flow Ind
Bi-Directional
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
No
Scada Conf Ind
No
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
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
Controller does not have control of any of the ebd valves from a remote location.
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
Esd System Failure Ind
Yes
Eq Additional Other Ind
Yes
Eq Additional Other Details
Controls Were Spec'd Wrong For Pipeline Application.
Preparer Name
E**** R********
Preparer Title
Regulatory Compliance Specialist Sr.
Preparer Email
E****************@w*******.com
Preparer Telephone
713-303-9956
Local Contact Name
T**** B*******
Local Contact Email
T*************@w*******.com
Local Contact Telephone
281-520-0007
Authorizer Name
J*** B***
Authorizer Title
Manager Pipeline Safety
Authorizer Telephone
337-317-9145
Authorizer Email
J********@w*******.com
Narrative
While compressing in normal operations a 10-inch station blowdown unexpectedly opened without a corresponding shutdown from the emergency shutdown (esd) / emergency blowdown (ebd) systems. Operations then manually initiated an esd, however, one side-gate valve failed to close, and gas continued to release from the 10-inch blowdown. Operations then attempted to manually close the side-gate valve but were unsuccessful. Operations was able to isolate the station by closing an upstream valve located approximately six miles away, 23 minutes after the initial blowdown opened. That particular valve is out of service pending a controls specs study. Locked the isolation valve below and left it out of service.
| Report Received Date | 2022-10-20 00:00:00 |
|---|---|
| Iyear | 2022 |
| Report Number | 20220111 |
| Supplemental Number | 37919 |
| Report Type | Supplemental Final |
| Operator Id | 19570 PHMSA Enforcement |
| Name | Transcontinental Gas Pipe Line Company |
| Operator Street Address | One Williams Center Md 43-4 |
| Operator City Name | Tulsa |
| Operator State Abbreviation | OK |
| Operator Postal Code | 74172 |
| Local Datetime | 2022-10-03 09:46:00 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 30.743425 Google Maps OpenStreetMap |
| Location Longitude | -91.265639 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1348896 NRC Report How to search |
| Nrc Rpt Datetime | 2022-10-03 11:28:00 |
| Additional Nrc Report Numbers | 1349060 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 32000 |
| 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 | 2022-10-03 09:46:00 |
| Restart Datetime | 2022-10-04 20:49:00 |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Operator |
| Initial Responder Com Datetime | 2022-10-03 09:34:00 |
| Ignite Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2022-10-03 09:23:00 |
| On Site Datetime | 2022-10-03 09:55:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | La |
| Onshore Postal Code | 70748 |
| Onshore City Name | Jackson |
| Onshore County Name | East Feliciana |
| Designated Location | Milepost |
| Designated Name | 588.51 |
| Pipe Fac Name | Compressor Station 60 |
| Segment Name | Le5048b Blowdown Valve |
| 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 | 2016 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Emergency Blowdown Valve Inadvertently Opened. |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 151 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 180480 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 5000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 5.64 |
| Prpty | 185480 |
| 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 | 585 |
| Gas Flow In Pipe In Mcf | 600000 |
| Mop Psig | 800 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 2001-07-22 00:00:00 |
| Maop Reversal Flow Ind | Bi-Directional |
| 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 | No |
| Scada Conf Ind | No |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| 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 | Controller does not have control of any of the ebd valves from a remote location. |
| 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 |
| Esd System Failure Ind | Yes |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Controls Were Spec'd Wrong For Pipeline Application. |
| Preparer Name | E**** R******** |
| Preparer Title | Regulatory Compliance Specialist Sr. |
| Preparer Email | E****************@w*******.com |
| Preparer Telephone | 713-303-9956 |
| Local Contact Name | T**** B******* |
| Local Contact Email | T*************@w*******.com |
| Local Contact Telephone | 281-520-0007 |
| Authorizer Name | J*** B*** |
| Authorizer Title | Manager Pipeline Safety |
| Authorizer Telephone | 337-317-9145 |
| Authorizer Email | J********@w*******.com |
| Narrative | While compressing in normal operations a 10-inch station blowdown unexpectedly opened without a corresponding shutdown from the emergency shutdown (esd) / emergency blowdown (ebd) systems. Operations then manually initiated an esd, however, one side-gate valve failed to close, and gas continued to release from the 10-inch blowdown. Operations then attempted to manually close the side-gate valve but were unsuccessful. Operations was able to isolate the station by closing an upstream valve located approximately six miles away, 23 minutes after the initial blowdown opened. That particular valve is out of service pending a controls specs study. Locked the isolation valve below and left it out of service. |
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