Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2019-02-19 — MI
Operator
Consumers Energy Co
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$7,700
Incident datetime
2019-02-19 02:43
Report number
Location
MI
Narrative
On february 19, 2019 at approximately 02:43 hours consumers energy gas control was notified of venting gas at ray compressor station. Ray compressor station is located in armada, michigan (macomb county). The on-call station mechanic was dispatched at 02:47 hours and arrived at the site at approximately 03:26 hours and gas was no longer venting. Security cameras at the station were used to determine the approximate location of the blowing gas. Upon further investigation the source of the blowing gas was determine to be the pressure relief valve (psv-00103) on the slug catcher. Subsequent review of pressure data indicates gas began venting at approximately 02:20 hours and blew for approximately 37 minutes before pressure readings normalized. At approximately 06:30 hours the slug catcher was isolated to further investigate the potential cause of the gas release. During the visual inspection, ice in the pilot sensing line was identified as a potential cause. After consulting with engineering the decision was made to isolate the slug catcher pressure relief valve and resume normal operation of the slug catcher. On february 20, 2019 after continued investigation and additional engineering consultation, the slug catcher was blown down and removed from service pending a root cause review. A root cause analysis (rca) was conducted by the experitec, the pressure relief valve manufacture, on february 25, 2019. A summary of the investigation results are as follows: based on the multiple conference calls held with taylor forge (vessel manufacturer), consumer energy, experitec and emerson it is our opinion that the external low ambient temperatures and internal wet conditions of the natural gas caused the subject relief valve to freeze at various points within the valve. The freezing caused the valve to open below it designated set pressure. The manufacturer recommended that all four (4) relief valves be heat traced and insulated to prevent the potential of possible freezing in the future. Consumers energy's operations have been performing the recommended requirements to return the vessel to service. The anticipated return to service date is march 20, 2019. The four (4) relief valves were heat traced and insulated per manufacturer's recommendation on march 18, 2019. The equipment will resume normal operation as needed during the 2019-2020 withdrawal season.
Detailed record list
Report Received Date
2019-03-19 00:00:00
Iyear
2019
Report Number
20190030
Supplemental Number
32951
Report Type
Supplemental Final
Operator Id
2748
Name
Consumers Energy Co
Operator Street Address
One Energy Plaza
Operator City Name
Jackson
Operator State Abbreviation
MI
Operator Postal Code
49201
Local Datetime
2019-02-19 02:20:00
Location Latitude
42.810312
Location Longitude
-82.867957
Nrc Rpt Num
1238054
Nrc Rpt Datetime
2019-02-19 10:23:00
Commodity Released Type
Natural Gas
Unintentional Release
8367
Intentional Release
1520
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2019-02-19 06:30:00
Restart Datetime
2019-10-15 11:30:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2019-02-19 02:43:00
On Site Datetime
2019-02-19 03:26:00
On Off Shore
Onshore
Onshore State Abbreviation
Mi
Onshore Postal Code
48005
Onshore City Name
Armada
Onshore County Name
Macomb
Designated Location
Survey Station No.
Designated Name
Relief Valve
Pipe Fac Name
Slug Catcher Vessel 3 - Relief Valve Psv-00103
Segment Name
Slug Catcher Vessel 3 - Relief Valve Psv-00103
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 Compressor Station Equipment And Piping
Item Involved
Other
Item Involved Details
Slug Catcher Relief Valve Psv-00103
Installation Year
2018
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Venting Gas - Slug Catcher Safety Relief Valve
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
702
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
25268
Est Cost Intentional Release
4560
Est Cost Prop Damage
7700
Est Cost Emergency
1000
Est Cost Other
0
Prpty
38528
Accident Psig
1194.79
Mop Psig
1800
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
No
Accident Identifier
Notification From Emergency Responder
Investigation Status
No, the facility was not monitored by a controller(s) at the time of 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
Relief Valve Ind
Yes
Additional Installation Ind
Yes
Preparer Name
C******* K***
Preparer Title
Senior Engineering Technical Analyst Ii
Preparer Email
C************@c********.com
Preparer Telephone
989-280-2963
Authorizer Name
J**** P****
Authorizer Title
Gas Compliance Lead
Authorizer Telephone
989-791-5749
Authorizer Email
J**********@c********.com
Narrative
On february 19, 2019 at approximately 02:43 hours consumers energy gas control was notified of venting gas at ray compressor station. Ray compressor station is located in armada, michigan (macomb county). The on-call station mechanic was dispatched at 02:47 hours and arrived at the site at approximately 03:26 hours and gas was no longer venting. Security cameras at the station were used to determine the approximate location of the blowing gas. Upon further investigation the source of the blowing gas was determine to be the pressure relief valve (psv-00103) on the slug catcher. Subsequent review of pressure data indicates gas began venting at approximately 02:20 hours and blew for approximately 37 minutes before pressure readings normalized. At approximately 06:30 hours the slug catcher was isolated to further investigate the potential cause of the gas release. During the visual inspection, ice in the pilot sensing line was identified as a potential cause. After consulting with engineering the decision was made to isolate the slug catcher pressure relief valve and resume normal operation of the slug catcher. On february 20, 2019 after continued investigation and additional engineering consultation, the slug catcher was blown down and removed from service pending a root cause review. A root cause analysis (rca) was conducted by the experitec, the pressure relief valve manufacture, on february 25, 2019. A summary of the investigation results are as follows: based on the multiple conference calls held with taylor forge (vessel manufacturer), consumer energy, experitec and emerson it is our opinion that the external low ambient temperatures and internal wet conditions of the natural gas caused the subject relief valve to freeze at various points within the valve. The freezing caused the valve to open below it designated set pressure. The manufacturer recommended that all four (4) relief valves be heat traced and insulated to prevent the potential of possible freezing in the future. Consumers energy's operations have been performing the recommended requirements to return the vessel to service. The anticipated return to service date is march 20, 2019. The four (4) relief valves were heat traced and insulated per manufacturer's recommendation on march 18, 2019. The equipment will resume normal operation as needed during the 2019-2020 withdrawal season.
| Report Received Date | 2019-03-19 00:00:00 |
|---|---|
| Iyear | 2019 |
| Report Number | 20190030 |
| Supplemental Number | 32951 |
| Report Type | Supplemental Final |
| Operator Id | 2748 PHMSA Enforcement |
| Name | Consumers Energy Co |
| Operator Street Address | One Energy Plaza |
| Operator City Name | Jackson |
| Operator State Abbreviation | MI |
| Operator Postal Code | 49201 |
| Local Datetime | 2019-02-19 02:20:00 |
| Location Latitude | 42.810312 Google Maps OpenStreetMap |
| Location Longitude | -82.867957 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1238054 NRC Report How to search |
| Nrc Rpt Datetime | 2019-02-19 10:23:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 8367 |
| Intentional Release | 1520 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2019-02-19 06:30:00 |
| Restart Datetime | 2019-10-15 11:30:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2019-02-19 02:43:00 |
| On Site Datetime | 2019-02-19 03:26:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Mi |
| Onshore Postal Code | 48005 |
| Onshore City Name | Armada |
| Onshore County Name | Macomb |
| Designated Location | Survey Station No. |
| Designated Name | Relief Valve |
| Pipe Fac Name | Slug Catcher Vessel 3 - Relief Valve Psv-00103 |
| Segment Name | Slug Catcher Vessel 3 - Relief Valve Psv-00103 |
| 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 Compressor Station Equipment And Piping |
| Item Involved | Other |
| Item Involved Details | Slug Catcher Relief Valve Psv-00103 |
| Installation Year | 2018 |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Venting Gas - Slug Catcher Safety Relief Valve |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 702 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 25268 |
| Est Cost Intentional Release | 4560 |
| Est Cost Prop Damage | 7700 |
| Est Cost Emergency | 1000 |
| Est Cost Other | 0 |
| Prpty | 38528 |
| Accident Psig | 1194.79 |
| Mop Psig | 1800 |
| 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 | No |
| Accident Identifier | Notification From Emergency Responder |
| Investigation Status | No, the facility was not monitored by a controller(s) at the time of 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 |
| Relief Valve Ind | Yes |
| Additional Installation Ind | Yes |
| Preparer Name | C******* K*** |
| Preparer Title | Senior Engineering Technical Analyst Ii |
| Preparer Email | C************@c********.com |
| Preparer Telephone | 989-280-2963 |
| Authorizer Name | J**** P**** |
| Authorizer Title | Gas Compliance Lead |
| Authorizer Telephone | 989-791-5749 |
| Authorizer Email | J**********@c********.com |
| Narrative | On february 19, 2019 at approximately 02:43 hours consumers energy gas control was notified of venting gas at ray compressor station. Ray compressor station is located in armada, michigan (macomb county). The on-call station mechanic was dispatched at 02:47 hours and arrived at the site at approximately 03:26 hours and gas was no longer venting. Security cameras at the station were used to determine the approximate location of the blowing gas. Upon further investigation the source of the blowing gas was determine to be the pressure relief valve (psv-00103) on the slug catcher. Subsequent review of pressure data indicates gas began venting at approximately 02:20 hours and blew for approximately 37 minutes before pressure readings normalized. At approximately 06:30 hours the slug catcher was isolated to further investigate the potential cause of the gas release. During the visual inspection, ice in the pilot sensing line was identified as a potential cause. After consulting with engineering the decision was made to isolate the slug catcher pressure relief valve and resume normal operation of the slug catcher. On february 20, 2019 after continued investigation and additional engineering consultation, the slug catcher was blown down and removed from service pending a root cause review. A root cause analysis (rca) was conducted by the experitec, the pressure relief valve manufacture, on february 25, 2019. A summary of the investigation results are as follows: based on the multiple conference calls held with taylor forge (vessel manufacturer), consumer energy, experitec and emerson it is our opinion that the external low ambient temperatures and internal wet conditions of the natural gas caused the subject relief valve to freeze at various points within the valve. The freezing caused the valve to open below it designated set pressure. The manufacturer recommended that all four (4) relief valves be heat traced and insulated to prevent the potential of possible freezing in the future. Consumers energy's operations have been performing the recommended requirements to return the vessel to service. The anticipated return to service date is march 20, 2019. The four (4) relief valves were heat traced and insulated per manufacturer's recommendation on march 18, 2019. The equipment will resume normal operation as needed during the 2019-2020 withdrawal season. |
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