Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2019-05-30 — TX
Operator
Tennessee Gas Pipeline Company
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$4,400
Incident datetime
2019-05-30 09:45
Report number
Location
TX
Narrative
At 9:42am on may 30, 2019, the esd system at tennessee gas pipeline company (tgp) station 860 was activated for a scheduled esd test. After 3 minutes, at 9:45am, station personnel noticed that the suction side of the station was evacuated as designed; however, the discharge side continued to blow down. At this point, station personnel began to locate the source of the release. Station personnel determined that bd 500-1, a 30" isolation valve, did not close as intended during the esd. This allowed gas to blow through four 8" and one 10" blowdown stacks. Station personnel closed the blowdown valves to stop the release. The total vent time was 16 minutes and the total unintentional gas loss was 48,698 mcf. Incident investigation revealed that valve bd 500-1 failed to close as the valve actuator motor did not operate. A 3rd party contractor examined the motor and determined that internal worn vanes caused the failure to operate. To prevent a reoccurrence, the valve actuator motor was replaced. A 48-hr update call was made to the nrc. The nrc report number for this call is #1247459.
Detailed record list
Report Received Date
2019-06-27 00:00:00
Iyear
2019
Report Number
20190073
Supplemental Number
32346
Report Type
Original Final
Operator Id
19160
Name
Tennessee Gas Pipeline Company
Operator Street Address
1001 Louisiana St
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2019-05-30 09:45:00
Location Latitude
35.848661
Location Longitude
-87.450504
Nrc Rpt Num
1247267
Nrc Rpt Datetime
2019-05-30 10:54:00
Commodity Released Type
Natural Gas
Unintentional Release
48698
Intentional Release
1956
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
No
Shutdown Explain
The Incident Ocurred When The Station Was Already Off-Line
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2019-05-30 09:45:00
On Site Datetime
2019-05-30 09:45:00
On Off Shore
Onshore
Onshore State Abbreviation
Tn
Onshore Postal Code
37137
Onshore City Name
Nunnelly
Onshore County Name
Hickman
Designated Location
Milepost
Designated Name
Cs 860
Pipe Fac Name
Compressor Station 860
Segment Name
500 Line
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
Valve
Valve Type
Auxiliary Or Other Valve
Installation Year
1962
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Other
Leak Type Other
Release Through Blowdown Stack
Class Location Type
Class 3 Location
Could Be Hca
No
Pir Radius
633
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
126615
Est Cost Intentional Release
5086
Est Cost Prop Damage
4400
Est Cost Emergency
1280
Est Cost Other
0
Prpty
137381
Accident Psig
702
Mop Psig
936
Mop Cfr Section
192.619(A)(2)
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction 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
There was no indication that any actions on the part of the controller contributed to the incident.
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
Other Control Relief Ind
Yes
Other Control Relief Details
Isolation Valve
Eq Additional Other Ind
Yes
Eq Additional Other Details
Internal Worn Vanes In Valve Actuator Motor
Preparer Name
S****** D****
Preparer Title
Pipeline Engineer
Preparer Email
S************@k***********.com
Preparer Telephone
713-420-4417
Authorizer Name
J**** H********
Authorizer Title
Director Compliance Codes And Standards
Authorizer Telephone
713-369-9443
Authorizer Email
J**************@k***********.com
Narrative
At 9:42am on may 30, 2019, the esd system at tennessee gas pipeline company (tgp) station 860 was activated for a scheduled esd test. After 3 minutes, at 9:45am, station personnel noticed that the suction side of the station was evacuated as designed; however, the discharge side continued to blow down. At this point, station personnel began to locate the source of the release. Station personnel determined that bd 500-1, a 30" isolation valve, did not close as intended during the esd. This allowed gas to blow through four 8" and one 10" blowdown stacks. Station personnel closed the blowdown valves to stop the release. The total vent time was 16 minutes and the total unintentional gas loss was 48,698 mcf. Incident investigation revealed that valve bd 500-1 failed to close as the valve actuator motor did not operate. A 3rd party contractor examined the motor and determined that internal worn vanes caused the failure to operate. To prevent a reoccurrence, the valve actuator motor was replaced. A 48-hr update call was made to the nrc. The nrc report number for this call is #1247459.
| Report Received Date | 2019-06-27 00:00:00 |
|---|---|
| Iyear | 2019 |
| Report Number | 20190073 |
| Supplemental Number | 32346 |
| Report Type | Original Final |
| Operator Id | 19160 PHMSA Enforcement |
| Name | Tennessee Gas Pipeline Company |
| Operator Street Address | 1001 Louisiana St |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2019-05-30 09:45:00 |
| Location Latitude | 35.848661 Google Maps OpenStreetMap |
| Location Longitude | -87.450504 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1247267 NRC Report How to search |
| Nrc Rpt Datetime | 2019-05-30 10:54:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 48698 |
| Intentional Release | 1956 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | The Incident Ocurred When The Station Was Already Off-Line |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2019-05-30 09:45:00 |
| On Site Datetime | 2019-05-30 09:45:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Tn |
| Onshore Postal Code | 37137 |
| Onshore City Name | Nunnelly |
| Onshore County Name | Hickman |
| Designated Location | Milepost |
| Designated Name | Cs 860 |
| Pipe Fac Name | Compressor Station 860 |
| Segment Name | 500 Line |
| 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 | Valve |
| Valve Type | Auxiliary Or Other Valve |
| Installation Year | 1962 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Other |
| Leak Type Other | Release Through Blowdown Stack |
| Class Location Type | Class 3 Location |
| Could Be Hca | No |
| Pir Radius | 633 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 126615 |
| Est Cost Intentional Release | 5086 |
| Est Cost Prop Damage | 4400 |
| Est Cost Emergency | 1280 |
| Est Cost Other | 0 |
| Prpty | 137381 |
| Accident Psig | 702 |
| Mop Psig | 936 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction 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 | There was no indication that any actions on the part of the controller contributed to the incident. |
| 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 |
| Other Control Relief Ind | Yes |
| Other Control Relief Details | Isolation Valve |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Internal Worn Vanes In Valve Actuator Motor |
| Preparer Name | S****** D**** |
| Preparer Title | Pipeline Engineer |
| Preparer Email | S************@k***********.com |
| Preparer Telephone | 713-420-4417 |
| Authorizer Name | J**** H******** |
| Authorizer Title | Director Compliance Codes And Standards |
| Authorizer Telephone | 713-369-9443 |
| Authorizer Email | J**************@k***********.com |
| Narrative | At 9:42am on may 30, 2019, the esd system at tennessee gas pipeline company (tgp) station 860 was activated for a scheduled esd test. After 3 minutes, at 9:45am, station personnel noticed that the suction side of the station was evacuated as designed; however, the discharge side continued to blow down. At this point, station personnel began to locate the source of the release. Station personnel determined that bd 500-1, a 30" isolation valve, did not close as intended during the esd. This allowed gas to blow through four 8" and one 10" blowdown stacks. Station personnel closed the blowdown valves to stop the release. The total vent time was 16 minutes and the total unintentional gas loss was 48,698 mcf. Incident investigation revealed that valve bd 500-1 failed to close as the valve actuator motor did not operate. A 3rd party contractor examined the motor and determined that internal worn vanes caused the failure to operate. To prevent a reoccurrence, the valve actuator motor was replaced. A 48-hr update call was made to the nrc. The nrc report number for this call is #1247459. |
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