Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2022-01-21 — TX
Operator
Enable Oklahoma Intrastate Transmission, Llc
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$9,500
Incident datetime
2022-01-21 08:30
Report number
Location
TX
Narrative
On 01/21/2022 a relief valve was discovered venting when a energy transfer employee arrived at the northeast power station in oologah, oklahoma. Gauges were installed to verify pressures. The relief valve was immediately closed and upon investigation it was determined that a reportable release of natural gas had occurred. The nrc was notified (nrc# 1327084, 1327011) and an investigation was initiated to determine cause. It was determined that regulator malfunction had occurred due to ice buildup on the regulator. The regulator was de-iced and the relief valve was rebuilt before being placed back into service. Extreme temperatures of 16 degrees occured on ths day and contributed to icing of the regulator, and ultimately caused the release.
Detailed record list
Report Received Date
2022-02-14 00:00:00
Iyear
2022
Report Number
20220012
Supplemental Number
36873
Report Type
Supplemental Final
Operator Id
26330
Name
Enable Oklahoma Intrastate Transmission, Llc
Operator Street Address
1300 Main Street
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2022-01-21 08:30:00
Time Zone
Central
Daylight Savings Ind
No
Location Latitude
36.429269
Location Longitude
-95.70107
Nrc Rpt Num
1327011
Nrc Rpt Datetime
2022-01-21 09:46:00
Additional Nrc Report Numbers
1327084
Commodity Released Type
Natural Gas
Unintentional Release
4172
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
No
Shutdown Explain
Valve Was Closed To Re-Seat Relief Valve
Communication State Fed Ind
No
Ignite Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2022-01-21 08:30:00
On Site Datetime
2022-01-21 08:30:00
On Off Shore
Onshore
Onshore State Abbreviation
Ok
Onshore Postal Code
74053
Onshore City Name
Oologah
Onshore County Name
Rogers
Designated Location
Not Applicable
Pipe Fac Name
Northeast Power Station
Segment Name
Northeast Power Station
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
Intrastate
System Part Involved
Onshore Regulator/metering Station Equipment And Piping
Item Involved
Regulator/control Valve
Installation Year
Unknown
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Other
Leak Type Other
Regulator Failure Due To Icing
Class Location Type
Class 3 Location
Could Be Hca
Yes
Determination Method
Method2
Pir Radius
407
Heat Damage Ind
No
Non Heat Damage Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
16313
Est Cost Intentional Release
0
Est Cost Prop Damage
9500
Est Cost Emergency
500
Est Cost Other
0
Gas Cost In Mcf
3.91
Prpty
26313
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
390
Gas Flow In Pipe In Mcf
2.68
Mop Psig
605
Mop Cfr Section
192.619(A)(2)
Maop Established Date
2019-05-23 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
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
Equipment failure
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
Pressure Regulator Ind
Yes
Eq Additional Other Ind
Yes
Eq Additional Other Details
Icing
Nf Temperature Ind
Yes
Eqf Control Releaf Ind
Yes
Preparer Name
J**** C****
Preparer Title
Sr. Manager Regulatory Compliance
Preparer Email
J**********@e*************
Preparer Telephone
4055768230
Local Contact Name
J**** C****
Local Contact Email
J**********@e*************.com
Local Contact Telephone
4055768230
Authorizer Name
J**** C****
Authorizer Title
Lead Specialist
Authorizer Telephone
4055768230
Authorizer Email
J**********@e*************.com
Narrative
On 01/21/2022 a relief valve was discovered venting when a energy transfer employee arrived at the northeast power station in oologah, oklahoma. Gauges were installed to verify pressures. The relief valve was immediately closed and upon investigation it was determined that a reportable release of natural gas had occurred. The nrc was notified (nrc# 1327084, 1327011) and an investigation was initiated to determine cause. It was determined that regulator malfunction had occurred due to ice buildup on the regulator. The regulator was de-iced and the relief valve was rebuilt before being placed back into service. Extreme temperatures of 16 degrees occured on ths day and contributed to icing of the regulator, and ultimately caused the release.
| Report Received Date | 2022-02-14 00:00:00 |
|---|---|
| Iyear | 2022 |
| Report Number | 20220012 |
| Supplemental Number | 36873 |
| Report Type | Supplemental Final |
| Operator Id | 26330 PHMSA Enforcement |
| Name | Enable Oklahoma Intrastate Transmission, Llc |
| Operator Street Address | 1300 Main Street |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2022-01-21 08:30:00 |
| Time Zone | Central |
| Daylight Savings Ind | No |
| Location Latitude | 36.429269 Google Maps OpenStreetMap |
| Location Longitude | -95.70107 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1327011 NRC Report How to search |
| Nrc Rpt Datetime | 2022-01-21 09:46:00 |
| Additional Nrc Report Numbers | 1327084 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 4172 |
| 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 | No |
| Shutdown Explain | Valve Was Closed To Re-Seat Relief Valve |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2022-01-21 08:30:00 |
| On Site Datetime | 2022-01-21 08:30:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ok |
| Onshore Postal Code | 74053 |
| Onshore City Name | Oologah |
| Onshore County Name | Rogers |
| Designated Location | Not Applicable |
| Pipe Fac Name | Northeast Power Station |
| Segment Name | Northeast Power Station |
| 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 | Intrastate |
| System Part Involved | Onshore Regulator/metering Station Equipment And Piping |
| Item Involved | Regulator/control Valve |
| Installation Year | Unknown |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Other |
| Leak Type Other | Regulator Failure Due To Icing |
| Class Location Type | Class 3 Location |
| Could Be Hca | Yes |
| Determination Method | Method2 |
| Pir Radius | 407 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 16313 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 9500 |
| Est Cost Emergency | 500 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 3.91 |
| Prpty | 26313 |
| 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 | 390 |
| Gas Flow In Pipe In Mcf | 2.68 |
| Mop Psig | 605 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 2019-05-23 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 | 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 | Equipment failure |
| 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 |
| Pressure Regulator Ind | Yes |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Icing |
| Nf Temperature Ind | Yes |
| Eqf Control Releaf Ind | Yes |
| Preparer Name | J**** C**** |
| Preparer Title | Sr. Manager Regulatory Compliance |
| Preparer Email | J**********@e************* |
| Preparer Telephone | 4055768230 |
| Local Contact Name | J**** C**** |
| Local Contact Email | J**********@e*************.com |
| Local Contact Telephone | 4055768230 |
| Authorizer Name | J**** C**** |
| Authorizer Title | Lead Specialist |
| Authorizer Telephone | 4055768230 |
| Authorizer Email | J**********@e*************.com |
| Narrative | On 01/21/2022 a relief valve was discovered venting when a energy transfer employee arrived at the northeast power station in oologah, oklahoma. Gauges were installed to verify pressures. The relief valve was immediately closed and upon investigation it was determined that a reportable release of natural gas had occurred. The nrc was notified (nrc# 1327084, 1327011) and an investigation was initiated to determine cause. It was determined that regulator malfunction had occurred due to ice buildup on the regulator. The regulator was de-iced and the relief valve was rebuilt before being placed back into service. Extreme temperatures of 16 degrees occured on ths day and contributed to icing of the regulator, and ultimately caused the release. |
External Resources
PHMSA pipeline safety insights.
Product
Features
Company
All rights reserved. Copyright © by ClearPHMSA