Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2013-06-10 — WV
Operator
Dominion Transmission, Inc
Cause
Equipment Failure
Commodity
—
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$350,000
Incident datetime
2013-06-10 06:10
Report number
Location
WV
Narrative
A review of the chambersburg silencer damage appears to have occurred from fatigue that likely had existed for quite some time. The history of this unit indicates that damage occurred during commissioning of this unit in 1996 that likely took a slug of hydro-test water and probably cracked/damaged the internal 44" diameter formed & dished head. Repairs to the upper section were repaired and the orifice plate was redesigned/replaced at this same time, but no damage was identified to the lower section. The silencer's current design has the dished head absorbing the majority of the discharge gas forces. The dished head failed during the 6/10/2013 venting event causing the entire eastern wall of the vessel to fail. This allowed all the gas to vent out the side of the silencer unit.
Detailed record list
Report Received Date
2013-07-03 00:00:00
Iyear
2013
Report Number
20130060
Supplemental Number
16031
Report Type
Original
Operator Id
2714
Name
Dominion Transmission, Inc
Operator Street Address
925 White Oaks Boulevard
Operator City Name
Bridgeport
Operator State Abbreviation
WV
Operator Postal Code
26330
Local Datetime
2013-06-10 06:10:00
Location Latitude
39.89066
Location Longitude
-77.71909
Nrc Rpt Num
1049844
Nrc Rpt Datetime
2013-06-10 07:19:00
Unintentional Release
23856
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2013-06-10 06:10:00
Restart Datetime
2013-06-17 17:00:00
Ignite Ind
No
Explode Ind
No
On Off Shore
Onshore
Onshore State Abbreviation
Pa
Onshore Postal Code
17202
Onshore City Name
Chambersburg
Onshore County Name
Franklin
Pipe Fac Name
Chambersburg Compressor 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
Interstate
System Part Involved
Onshore Compressor Station Equipment And Piping
Item Involved
Compressor
Installation Year
1996
Material Involved
Carbon Steel
Release Type
Rupture
Rupture Orient
Other
Rupture Details
During Venting Of Gas, The Silencer Failed.
Class Location Type
Class 2 Location
Could Be Hca
No
Pir Radius
390
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
3000
Est Cost Unintentional Release
102000
Est Cost Intentional Release
0
Est Cost Prop Damage
350000
Est Cost Emergency
0
Est Cost Other
0
Prpty
455000
Accident Psig
1002
Mop Psig
1250
Mop Cfr Section
Not On Omb-Approved Form When Submitted
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
No
Scada Detection Ind
Yes
Scada Conf Ind
No
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
Purchase power was lost at the site. The emergency generator shutdown on low oil pressure sometime after 4 am, 15 min later the ups system was drained and the facility was without power. During this time, gas vented out the silencer and caused the silencer to rupture.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Failure Of Equipment Body (Except Compressor), Vessel Plate, Or Other Material
Eq Failure Type
Failure Of Equipment Body (Except Compressor), Vessel Plate, Or Other Material
Eq Additional Other Ind
Yes
Eq Additional Other Details
Failure Due To Slug Of Water During Commissioning Of The Unit
Preparer Name
E*** T*****
Preparer Title
Compliance Engineer Iii
Preparer Email
E************@d**.com
Preparer Telephone
304-627-3034
Authorizer Name
E*** T*****
Authorizer Title
Compliance Engineer Iii
Authorizer Telephone
304-627-3034
Authorizer Email
E************@d**.com
Narrative
A review of the chambersburg silencer damage appears to have occurred from fatigue that likely had existed for quite some time. The history of this unit indicates that damage occurred during commissioning of this unit in 1996 that likely took a slug of hydro-test water and probably cracked/damaged the internal 44" diameter formed & dished head. Repairs to the upper section were repaired and the orifice plate was redesigned/replaced at this same time, but no damage was identified to the lower section. The silencer's current design has the dished head absorbing the majority of the discharge gas forces. The dished head failed during the 6/10/2013 venting event causing the entire eastern wall of the vessel to fail. This allowed all the gas to vent out the side of the silencer unit.
| Report Received Date | 2013-07-03 00:00:00 |
|---|---|
| Iyear | 2013 |
| Report Number | 20130060 |
| Supplemental Number | 16031 |
| Report Type | Original |
| Operator Id | 2714 PHMSA Enforcement |
| Name | Dominion Transmission, Inc |
| Operator Street Address | 925 White Oaks Boulevard |
| Operator City Name | Bridgeport |
| Operator State Abbreviation | WV |
| Operator Postal Code | 26330 |
| Local Datetime | 2013-06-10 06:10:00 |
| Location Latitude | 39.89066 Google Maps OpenStreetMap |
| Location Longitude | -77.71909 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1049844 NRC Report How to search |
| Nrc Rpt Datetime | 2013-06-10 07:19:00 |
| Unintentional Release | 23856 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2013-06-10 06:10:00 |
| Restart Datetime | 2013-06-17 17:00:00 |
| Ignite Ind | No |
| Explode Ind | No |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Pa |
| Onshore Postal Code | 17202 |
| Onshore City Name | Chambersburg |
| Onshore County Name | Franklin |
| Pipe Fac Name | Chambersburg Compressor 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 | Interstate |
| System Part Involved | Onshore Compressor Station Equipment And Piping |
| Item Involved | Compressor |
| Installation Year | 1996 |
| Material Involved | Carbon Steel |
| Release Type | Rupture |
| Rupture Orient | Other |
| Rupture Details | During Venting Of Gas, The Silencer Failed. |
| Class Location Type | Class 2 Location |
| Could Be Hca | No |
| Pir Radius | 390 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 3000 |
| Est Cost Unintentional Release | 102000 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 350000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 455000 |
| Accident Psig | 1002 |
| Mop Psig | 1250 |
| Mop Cfr Section | Not On Omb-Approved Form When Submitted 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 | No |
| Scada Detection Ind | Yes |
| Scada Conf Ind | No |
| 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 | Purchase power was lost at the site. The emergency generator shutdown on low oil pressure sometime after 4 am, 15 min later the ups system was drained and the facility was without power. During this time, gas vented out the silencer and caused the silencer to rupture. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Failure Of Equipment Body (Except Compressor), Vessel Plate, Or Other Material |
| Eq Failure Type | Failure Of Equipment Body (Except Compressor), Vessel Plate, Or Other Material |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Failure Due To Slug Of Water During Commissioning Of The Unit |
| Preparer Name | E*** T***** |
| Preparer Title | Compliance Engineer Iii |
| Preparer Email | E************@d**.com |
| Preparer Telephone | 304-627-3034 |
| Authorizer Name | E*** T***** |
| Authorizer Title | Compliance Engineer Iii |
| Authorizer Telephone | 304-627-3034 |
| Authorizer Email | E************@d**.com |
| Narrative | A review of the chambersburg silencer damage appears to have occurred from fatigue that likely had existed for quite some time. The history of this unit indicates that damage occurred during commissioning of this unit in 1996 that likely took a slug of hydro-test water and probably cracked/damaged the internal 44" diameter formed & dished head. Repairs to the upper section were repaired and the orifice plate was redesigned/replaced at this same time, but no damage was identified to the lower section. The silencer's current design has the dished head absorbing the majority of the discharge gas forces. The dished head failed during the 6/10/2013 venting event causing the entire eastern wall of the vessel to fail. This allowed all the gas to vent out the side of the silencer unit. |
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