Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2018-11-23 — TX
Operator
Texas Eastern Transmission, Lp (Spectra Energy Partners, Lp)
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$100
Incident datetime
2018-11-23 16:24
Report number
Location
TX
Narrative
Original report: on friday, november 23, at 4:24 pm est lilly station had a station emergency shut down (esd). The esd was caused by a commercial power disruption. The emergency generator started though a circuit breaker tripped causing a loss of electrical power which resulted in full station esd activation. When the esd occurred, gas vented through the three station esd blow down valves because 30"x 24" (valve 19-149) failed to close automatically. Operator personnel manually closed valve 19-149 at 5:01 pm est. Total gas loss through the three esd blow down valves was calculated to be 23.24 mmscf. When the esd system activated, the control pilot assembly in the shafer actuator for valve 19-149 froze due to the presence of water (external to the control) and cold ambient temperatures which caused the valve to remain open. Supplemental report: 48 hr nrc report 1231234 prior to the november 23, 2018 incident at tetlp's lilly compressor station, tetlp had calculated the estimated gas loss for a normal esd event at lilly station to be 1.23 mmscf. Based on this calculation, an esd operating as anticipated would not be reportable, since the gas release would be well under the 3 mmscf threshold for reporting. However, one of the esd isolation valves unexpectedly did not close properly, so the actual gas loss was greater than the estimated 1.23 mmscf, and greater than the 3 mmscf reporting threshold. On nov. 24, the estimated gas loss was calculated to be more than 3 mmscf, and then was reported to nrc. This event has identified the need for additional training and awareness of the requirement to immediately report such events to internal personnel responsible for nrc notifications. The training will be developed and implemented system-wide in 2019.
Detailed record list
Report Received Date
2018-12-19 00:00:00
Iyear
2018
Report Number
20180133
Supplemental Number
31532
Report Type
Supplemental Final
Operator Id
19235
Name
Texas Eastern Transmission, Lp (Spectra Energy Partners, Lp)
Operator Street Address
915 North Eldridge Parkway
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77079
Local Datetime
2018-11-23 16:24:00
Location Latitude
40.43803446
Location Longitude
-78.59106716
Nrc Rpt Num
1231182
Nrc Rpt Datetime
2018-11-24 16:15:00
Commodity Released Type
Natural Gas
Unintentional Release
23240
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
No
Shutdown Explain
Gas Was Able To Bypass The Compressor Station. Not Requiring Pipeline Shutdown.
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2018-11-23 16:24:00
On Site Datetime
2018-11-23 16:51:00
On Off Shore
Onshore
Onshore State Abbreviation
Pa
Onshore Postal Code
15938
Onshore City Name
Lilly
Onshore County Name
Cambria
Designated Location
Milepost
Designated Name
54.76
Pipe Fac Name
Line 19
Segment Name
Armagh-Lilly
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
Mainline
Valve Mainline Type
Gate
Valve Manufacturer
30" X 24" Nordstrum Plug Valve
Installation Year
1961
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Compressor Station Emergency Shutdown.
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
671
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
100164
Est Cost Intentional Release
0
Est Cost Prop Damage
100
Est Cost Emergency
0
Est Cost Other
0
Prpty
100264
Accident Psig
618
Mop Psig
1050
Mop Cfr Section
192.619(A)(1)
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
Yes
Scada Conf Ind
Yes
Accident Identifier
Controller
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
The control room personnel could not have caused the malfunction of the valve.
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
Block Valve Ind
Yes
Eq Additional Other Ind
Yes
Eq Additional Other Details
External Freezing In The Shafer Operator Control Pilot
Preparer Name
M**** S******
Preparer Title
Engineer
Preparer Email
M************@e*******.com
Preparer Telephone
713-627-4726
Authorizer Name
N***** A****
Authorizer Title
Supervisor
Authorizer Telephone
713-627-5008
Authorizer Email
N***********@e*******.com
Narrative
Original report: on friday, november 23, at 4:24 pm est lilly station had a station emergency shut down (esd). The esd was caused by a commercial power disruption. The emergency generator started though a circuit breaker tripped causing a loss of electrical power which resulted in full station esd activation. When the esd occurred, gas vented through the three station esd blow down valves because 30"x 24" (valve 19-149) failed to close automatically. Operator personnel manually closed valve 19-149 at 5:01 pm est. Total gas loss through the three esd blow down valves was calculated to be 23.24 mmscf. When the esd system activated, the control pilot assembly in the shafer actuator for valve 19-149 froze due to the presence of water (external to the control) and cold ambient temperatures which caused the valve to remain open. Supplemental report: 48 hr nrc report 1231234 prior to the november 23, 2018 incident at tetlp's lilly compressor station, tetlp had calculated the estimated gas loss for a normal esd event at lilly station to be 1.23 mmscf. Based on this calculation, an esd operating as anticipated would not be reportable, since the gas release would be well under the 3 mmscf threshold for reporting. However, one of the esd isolation valves unexpectedly did not close properly, so the actual gas loss was greater than the estimated 1.23 mmscf, and greater than the 3 mmscf reporting threshold. On nov. 24, the estimated gas loss was calculated to be more than 3 mmscf, and then was reported to nrc. This event has identified the need for additional training and awareness of the requirement to immediately report such events to internal personnel responsible for nrc notifications. The training will be developed and implemented system-wide in 2019.
| Report Received Date | 2018-12-19 00:00:00 |
|---|---|
| Iyear | 2018 |
| Report Number | 20180133 |
| Supplemental Number | 31532 |
| Report Type | Supplemental Final |
| Operator Id | 19235 PHMSA Enforcement |
| Name | Texas Eastern Transmission, Lp (Spectra Energy Partners, Lp) |
| Operator Street Address | 915 North Eldridge Parkway |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77079 |
| Local Datetime | 2018-11-23 16:24:00 |
| Location Latitude | 40.43803446 Google Maps OpenStreetMap |
| Location Longitude | -78.59106716 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1231182 NRC Report How to search |
| Nrc Rpt Datetime | 2018-11-24 16:15:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 23240 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Gas Was Able To Bypass The Compressor Station. Not Requiring Pipeline Shutdown. |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2018-11-23 16:24:00 |
| On Site Datetime | 2018-11-23 16:51:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Pa |
| Onshore Postal Code | 15938 |
| Onshore City Name | Lilly |
| Onshore County Name | Cambria |
| Designated Location | Milepost |
| Designated Name | 54.76 |
| Pipe Fac Name | Line 19 |
| Segment Name | Armagh-Lilly |
| 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 | Mainline |
| Valve Mainline Type | Gate |
| Valve Manufacturer | 30" X 24" Nordstrum Plug Valve |
| Installation Year | 1961 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Compressor Station Emergency Shutdown. |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 671 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 100164 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 100 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 100264 |
| Accident Psig | 618 |
| Mop Psig | 1050 |
| Mop Cfr Section | 192.619(A)(1) 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 | Yes |
| Scada Conf Ind | Yes |
| Accident Identifier | Controller |
| 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 | The control room personnel could not have caused the malfunction of the valve. |
| 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 |
| Block Valve Ind | Yes |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | External Freezing In The Shafer Operator Control Pilot |
| Preparer Name | M**** S****** |
| Preparer Title | Engineer |
| Preparer Email | M************@e*******.com |
| Preparer Telephone | 713-627-4726 |
| Authorizer Name | N***** A**** |
| Authorizer Title | Supervisor |
| Authorizer Telephone | 713-627-5008 |
| Authorizer Email | N***********@e*******.com |
| Narrative | Original report: on friday, november 23, at 4:24 pm est lilly station had a station emergency shut down (esd). The esd was caused by a commercial power disruption. The emergency generator started though a circuit breaker tripped causing a loss of electrical power which resulted in full station esd activation. When the esd occurred, gas vented through the three station esd blow down valves because 30"x 24" (valve 19-149) failed to close automatically. Operator personnel manually closed valve 19-149 at 5:01 pm est. Total gas loss through the three esd blow down valves was calculated to be 23.24 mmscf. When the esd system activated, the control pilot assembly in the shafer actuator for valve 19-149 froze due to the presence of water (external to the control) and cold ambient temperatures which caused the valve to remain open. Supplemental report: 48 hr nrc report 1231234 prior to the november 23, 2018 incident at tetlp's lilly compressor station, tetlp had calculated the estimated gas loss for a normal esd event at lilly station to be 1.23 mmscf. Based on this calculation, an esd operating as anticipated would not be reportable, since the gas release would be well under the 3 mmscf threshold for reporting. However, one of the esd isolation valves unexpectedly did not close properly, so the actual gas loss was greater than the estimated 1.23 mmscf, and greater than the 3 mmscf reporting threshold. On nov. 24, the estimated gas loss was calculated to be more than 3 mmscf, and then was reported to nrc. This event has identified the need for additional training and awareness of the requirement to immediately report such events to internal personnel responsible for nrc notifications. The training will be developed and implemented system-wide in 2019. |
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