Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2012-11-14 — NY
Operator
Consolidated Edison Co Of New York
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$120,000
Incident datetime
2012-11-14 13:12
Report number
Location
NY
Narrative
On november 14, 2012 at 13:12 hrs. Gas construction reported a possible leak on the 24" steel transmission main at 23 maple street, eastchester, ny to the gas emergency response center (gerc). Two repairs were previously made on a parallel 4" high pressure 1932 steel distribution main and the gas readings indicated a possible leak on the transmission main. A code murre (multiple resource response event) was initiated and the gerc dispatched gas distribution services (gds), the emergency response group (erg) and supervision.Gas engineering, pressure control and gas control were notified. Gerc and gas control identified rov 25934 and mv 25968 to isolate the area per contingency case 34a. Gas control confirmed communication with rov 25934 and gds inspected and confirmed accessibility and position of mv 27235 (open) and mv # 36697 (closed). These valves are straddle connections to regulator station gr-425 (transmission-high pressure) and were needed for main depressurization and isolation as required. The leak was staffed overnight and an operational plan was developed. At 09:53 on november 15, 2012 the isolation of this segment of transmission main was confirmed. Pressure control was on location and the segment was depressurized via gr-425 and excavation commenced to expose the source of the leak. Gas control declared a condition yellow and issued a limited work order on the 245 psi transmission system to ensure system supply. Corrosion control performed a patrol over this system to ensure no unregistered activity is ongoing that would jeopardize the gas transmission system. Around-the-clock operations continued and on friday, november 15, 2012 at 19:15 hrs a confirmed visual leak on a 24" coupling approximately 20' south of the service supplying # 20 maple st (te). A welded repair sleeve was installed, and the associated testing was successful. The affected segment of main was re-energized and during the incremental pressure increase and associated leak surveillance, a second leak was detected over a coupling approximately 40' south of the original repair. The main was depressurized and a welded repair sleeve was successfully installed and tested. The main was re-energized and no other leaks found. Bronx construction-capital, westchester gas operations, pressure control and transmission engineering-major projects were on location. The transmission system was returned to normal operating conditions on sunday november 18, 2012 at 11:12 hrs. The US DOT, nys psc and tefd were notified. The tefd and psc visited the location and were kept apprised. Media relations was updated due to an inquiry from bloomberg news. There were no evacuations or injuries attributed to this incident.This was a serious level incident.
Detailed record list
Report Received Date
2012-12-10 00:00:00
Iyear
2012
Report Number
20120120
Supplemental Number
15814
Report Type
Supplemental Final
Operator Id
2704
Name
Consolidated Edison Co Of New York
Operator Street Address
4 Irving Place
Operator City Name
New York
Operator State Abbreviation
NY
Operator Postal Code
10003
Local Datetime
2012-11-14 13:12:00
Location Latitude
40.976441
Location Longitude
-73.807641
Nrc Rpt Num
1030677
Nrc Rpt Datetime
2012-11-15 10:16:00
Commodity Released Type
Natural Gas
Unintentional Release
11
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2012-11-15 09:53:00
Restart Datetime
2012-11-18 11:12:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2012-11-14 13:12:00
On Site Datetime
2012-11-14 13:12:00
On Off Shore
Onshore
Onshore State Abbreviation
Ny
Onshore Postal Code
10707-0000
Onshore City Name
Eastchester
Onshore County Name
Westchester
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Pavement
Depth Of Cover
48
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Other
Item Involved Details
(2) 24" Compression Couplings
Installation Year
1948
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Seal Or Packing
Class Location Type
Class 4 Location
Could Be Hca
Yes
Determination Method
Method1
Pir Radius
259
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
22
Est Cost Intentional Release
0
Est Cost Prop Damage
120000
Est Cost Emergency
2500
Est Cost Other
0
Prpty
122522
Accident Psig
209
Mop Psig
245
Mop Cfr Section
Not On Omb-Approved Form When Submitted
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Remotely Controlled
Length Segment Isolated
6566
Internal Inspection Ind
No
Diameter Change Ind
Yes
Unsuitable Mainline Ind
Yes
Tight Mitered Ind
Yes
Operation Complications Ind
No
Pipeline Function
Transmission System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
No
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
Minor leak on compression couplings resulting in no pressure loss or increased flow.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Threaded Connection/coupling Failure
Eq Failure Type
Threaded Connection/coupling Failure
Other Stripped Ind
Mechanical Coupling
Eq Additional Other Ind
Yes
Eq Additional Other Details
Compression Coupling Leak At Seal
Preparer Name
K**** F****
Preparer Title
Operations Manager--Gas Emergency Response Center
Preparer Email
F*****@c****.com
Preparer Telephone
718-319-2310
Preparer Fax
718-904-4607
Authorizer Name
V***** D******
Authorizer Title
Deptartment Manager--Gas Emergency Response Center
Authorizer Telephone
718-319-2350
Authorizer Email
D*******@c****.com
Narrative
On november 14, 2012 at 13:12 hrs. Gas construction reported a possible leak on the 24" steel transmission main at 23 maple street, eastchester, ny to the gas emergency response center (gerc). Two repairs were previously made on a parallel 4" high pressure 1932 steel distribution main and the gas readings indicated a possible leak on the transmission main. A code murre (multiple resource response event) was initiated and the gerc dispatched gas distribution services (gds), the emergency response group (erg) and supervision.Gas engineering, pressure control and gas control were notified. Gerc and gas control identified rov 25934 and mv 25968 to isolate the area per contingency case 34a. Gas control confirmed communication with rov 25934 and gds inspected and confirmed accessibility and position of mv 27235 (open) and mv # 36697 (closed). These valves are straddle connections to regulator station gr-425 (transmission-high pressure) and were needed for main depressurization and isolation as required. The leak was staffed overnight and an operational plan was developed. At 09:53 on november 15, 2012 the isolation of this segment of transmission main was confirmed. Pressure control was on location and the segment was depressurized via gr-425 and excavation commenced to expose the source of the leak. Gas control declared a condition yellow and issued a limited work order on the 245 psi transmission system to ensure system supply. Corrosion control performed a patrol over this system to ensure no unregistered activity is ongoing that would jeopardize the gas transmission system. Around-the-clock operations continued and on friday, november 15, 2012 at 19:15 hrs a confirmed visual leak on a 24" coupling approximately 20' south of the service supplying # 20 maple st (te). A welded repair sleeve was installed, and the associated testing was successful. The affected segment of main was re-energized and during the incremental pressure increase and associated leak surveillance, a second leak was detected over a coupling approximately 40' south of the original repair. The main was depressurized and a welded repair sleeve was successfully installed and tested. The main was re-energized and no other leaks found. Bronx construction-capital, westchester gas operations, pressure control and transmission engineering-major projects were on location. The transmission system was returned to normal operating conditions on sunday november 18, 2012 at 11:12 hrs. The US DOT, nys psc and tefd were notified. The tefd and psc visited the location and were kept apprised. Media relations was updated due to an inquiry from bloomberg news. There were no evacuations or injuries attributed to this incident.This was a serious level incident.
| Report Received Date | 2012-12-10 00:00:00 |
|---|---|
| Iyear | 2012 |
| Report Number | 20120120 |
| Supplemental Number | 15814 |
| Report Type | Supplemental Final |
| Operator Id | 2704 PHMSA Enforcement |
| Name | Consolidated Edison Co Of New York |
| Operator Street Address | 4 Irving Place |
| Operator City Name | New York |
| Operator State Abbreviation | NY |
| Operator Postal Code | 10003 |
| Local Datetime | 2012-11-14 13:12:00 |
| Location Latitude | 40.976441 Google Maps OpenStreetMap |
| Location Longitude | -73.807641 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1030677 NRC Report How to search |
| Nrc Rpt Datetime | 2012-11-15 10:16:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 11 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2012-11-15 09:53:00 |
| Restart Datetime | 2012-11-18 11:12:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2012-11-14 13:12:00 |
| On Site Datetime | 2012-11-14 13:12:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ny |
| Onshore Postal Code | 10707-0000 |
| Onshore City Name | Eastchester |
| Onshore County Name | Westchester |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Pavement |
| Depth Of Cover | 48 |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Other |
| Item Involved Details | (2) 24" Compression Couplings |
| Installation Year | 1948 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Seal Or Packing |
| Class Location Type | Class 4 Location |
| Could Be Hca | Yes |
| Determination Method | Method1 |
| Pir Radius | 259 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 22 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 120000 |
| Est Cost Emergency | 2500 |
| Est Cost Other | 0 |
| Prpty | 122522 |
| Accident Psig | 209 |
| Mop Psig | 245 |
| 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 |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Remotely Controlled |
| Length Segment Isolated | 6566 |
| Internal Inspection Ind | No |
| Diameter Change Ind | Yes |
| Unsuitable Mainline Ind | Yes |
| Tight Mitered Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | Transmission System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | No |
| 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 | Minor leak on compression couplings resulting in no pressure loss or increased flow. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Threaded Connection/coupling Failure |
| Eq Failure Type | Threaded Connection/coupling Failure |
| Other Stripped Ind | Mechanical Coupling |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Compression Coupling Leak At Seal |
| Preparer Name | K**** F**** |
| Preparer Title | Operations Manager--Gas Emergency Response Center |
| Preparer Email | F*****@c****.com |
| Preparer Telephone | 718-319-2310 |
| Preparer Fax | 718-904-4607 |
| Authorizer Name | V***** D****** |
| Authorizer Title | Deptartment Manager--Gas Emergency Response Center |
| Authorizer Telephone | 718-319-2350 |
| Authorizer Email | D*******@c****.com |
| Narrative | On november 14, 2012 at 13:12 hrs. Gas construction reported a possible leak on the 24" steel transmission main at 23 maple street, eastchester, ny to the gas emergency response center (gerc). Two repairs were previously made on a parallel 4" high pressure 1932 steel distribution main and the gas readings indicated a possible leak on the transmission main. A code murre (multiple resource response event) was initiated and the gerc dispatched gas distribution services (gds), the emergency response group (erg) and supervision.Gas engineering, pressure control and gas control were notified. Gerc and gas control identified rov 25934 and mv 25968 to isolate the area per contingency case 34a. Gas control confirmed communication with rov 25934 and gds inspected and confirmed accessibility and position of mv 27235 (open) and mv # 36697 (closed). These valves are straddle connections to regulator station gr-425 (transmission-high pressure) and were needed for main depressurization and isolation as required. The leak was staffed overnight and an operational plan was developed. At 09:53 on november 15, 2012 the isolation of this segment of transmission main was confirmed. Pressure control was on location and the segment was depressurized via gr-425 and excavation commenced to expose the source of the leak. Gas control declared a condition yellow and issued a limited work order on the 245 psi transmission system to ensure system supply. Corrosion control performed a patrol over this system to ensure no unregistered activity is ongoing that would jeopardize the gas transmission system. Around-the-clock operations continued and on friday, november 15, 2012 at 19:15 hrs a confirmed visual leak on a 24" coupling approximately 20' south of the service supplying # 20 maple st (te). A welded repair sleeve was installed, and the associated testing was successful. The affected segment of main was re-energized and during the incremental pressure increase and associated leak surveillance, a second leak was detected over a coupling approximately 40' south of the original repair. The main was depressurized and a welded repair sleeve was successfully installed and tested. The main was re-energized and no other leaks found. Bronx construction-capital, westchester gas operations, pressure control and transmission engineering-major projects were on location. The transmission system was returned to normal operating conditions on sunday november 18, 2012 at 11:12 hrs. The US DOT, nys psc and tefd were notified. The tefd and psc visited the location and were kept apprised. Media relations was updated due to an inquiry from bloomberg news. There were no evacuations or injuries attributed to this incident.This was a serious level incident. |
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