Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2015-09-23 — NY
Operator
Consolidated Edison Co Of New York
Cause
Incorrect Operation
Commodity
—
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2015-09-23 05:17
Report number
Location
NY
Narrative
On september 23, 2015 a biennial remote closure test of remotely operated valve (rov) 62190 was performed; as part of this procedure, two closures are completed to first test a frame relay communication path, followed by a wireless communication path. Initial conditions were rov 62190 in the 100% open condition on frame relay communications. Flow through the transco 134th street gate station upstream of the rov was 1700 dth/h. The sequence of events is as follows: 5:07:55 - set point for rov 62190 set to 0% open 5:08:02 - rov 62190 in travel 5:09:10 - rov 62190 43% open - alarm for position 5:10:11 - rov 62190 0% open - alarm for full closure 5:10:15 - set point for rov 62190 set to 100% open 5:10:24 - rov 62190 in travel 5:12:14 - rov 62190 100% open 5:13:48 - rov 62190 wireless communication path selected 5:14:07 - set point for rov 62190 set to 0% open 5:15:04 - rov 62190 valve in travel 5:15:04 - rov 62190 59% open - alarm generated for position 5:16:32 - transco 134th street flow is 2517 dth/h 5:16:54 - transco 134th street pressure is 346 psig - alarm for hi pressure 5:17:17 - rov 62190 0% open - alarm for full closure 5:17:17 - rov 62190 north (upstream) pressure is 375.7 psig - alarm for hi hi pressure. Trending shows an instantaneous pressure peak at 396 psig; maop + 10% exceeded for 20 seconds (>385 psig) 5:17:22 - set point for rov 62190 set to 100% open 5:17:32 - rov 62190 in travel 5:18:05 - transco 134th street pressure is 288 psig - pressure in normal range 5:18:44 - rov 62190 north (upstream) pressure is 288 psig - pressure in normal range 5:19:58 - rov 62190 100% open due to conflicting pressure readings on the same line the controller notified gas engineering during normal business hours on 9/23/15. Pressure control (pc) instruments and controls (I/c) verified transducer calibration for both transducers on 9/24/15. Transco williams was contacted to extract station data on 9/24/15; transco stated that physical data would be available within 24 hours. On 9/25/15 information from transco indicated a discrete high pressure alarm in excess of 360 psig and travel of the first of two over pressure protection (opp) devices set at 365 psig and 370 psig respectively. Due to the high probability of an event, central information group (cig), public service commission (psc), and national reporting center (nrc) were notified on 9/25. Post-analysis found that internal specification g-11810-29 "procedure for inspection and maintenance of gas transmission pipelines" made no provision for time periods between valve movements to allow for system stabilization. Revision g-11810-30a incorporated a 15 minute stabilization time for all valve movements for rov full-closure inspections. Procedural practice also incorporated reducing flow to 0 dth/h prior to any full-closure test of a rov.
Detailed record list
Report Received Date
2015-09-28 00:00:00
Iyear
2015
Report Number
20150116
Supplemental Number
17343
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
2015-09-23 05:17:00
Location Latitude
40.822217
Location Longitude
-73.958953
Nrc Rpt Num
1129387
Nrc Rpt Datetime
2015-09-25 15:36:00
Unintentional Release
0
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
No
Shutdown Explain
Periodic Testing Of A Remote Operated Valve (Rov)
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2015-09-23 05:17:00
On Site Datetime
2015-09-23 05:17:00
On Off Shore
Onshore
Onshore State Abbreviation
Ny
Onshore Postal Code
10031
Onshore City Name
New York
Onshore County Name
New York
Designated Location
Milepost
Designated Name
Rov-62190
Pipe Fac Name
Con Edison
Segment Name
M1
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Underground
Incident Area Subtype
In Underground Enclosed Space (E.g. Vault)
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Valve
Valve Type
Mainline
Valve Mainline Type
Ball
Valve Manufacturer
Cameron
Installation Year
2013
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Exceeded Maximum Allowable Operating Pressure (Maop) Upstream Of Valve. Valve Was Closed As Part Of Periodic Remote Testing Procedure
Class Location Type
Class 4 Location
Could Be Hca
Yes
Determination Method
Method1
Pir Radius
387
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
0
Est Cost Intentional Release
0
Est Cost Prop Damage
0
Est Cost Emergency
0
Est Cost Other
0
Prpty
0
Accident Psig
396
Mop Psig
350
Mop Cfr Section
192.619(A)(1)
Accident Pressure
Pressure Exceeded The Applicable Allowance In 192.201
Pressure Restriction Ind
No
Upstream Valve Type Ind
Automatic
Downstream Valve Type Ind
Remotely Controlled
Length Segment Isolated
87
Internal Inspection Ind
No
Diameter Change Ind
Yes
Unsuitable Mainline Ind
Yes
Tight Mitered Ind
Yes
Operation Complications Ind
Yes
Other Complications Ind
Yes
Inspect Comp Details
No Launchers
Pipeline Function
Transmission System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
Yes
Scada Conf Ind
No
Accident Identifier
Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations)
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
It is a normally performed test that will be re-evaluated.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Incorrect Operation
Cause Details
Pipeline Or Equipment Overpressured
Operation Type
Pipeline Or Equipment Overpressured
Related Inadequate Proc Ind
Yes
Category Type
Routine Maintenance
Operator Qualification Ind
Yes
Qualified Individuals
Yes, They Were Qualified For The Task(S)
Preparer Name
G******* M*******
Preparer Title
Department Manager
Preparer Email
M********@c****.com
Preparer Telephone
718 794 2873
Authorizer Name
A****** L***
Authorizer Title
Chief Engineer
Authorizer Telephone
7188391759
Authorizer Email
L****@c****.com
Narrative
On september 23, 2015 a biennial remote closure test of remotely operated valve (rov) 62190 was performed; as part of this procedure, two closures are completed to first test a frame relay communication path, followed by a wireless communication path. Initial conditions were rov 62190 in the 100% open condition on frame relay communications. Flow through the transco 134th street gate station upstream of the rov was 1700 dth/h. The sequence of events is as follows: 5:07:55 - set point for rov 62190 set to 0% open 5:08:02 - rov 62190 in travel 5:09:10 - rov 62190 43% open - alarm for position 5:10:11 - rov 62190 0% open - alarm for full closure 5:10:15 - set point for rov 62190 set to 100% open 5:10:24 - rov 62190 in travel 5:12:14 - rov 62190 100% open 5:13:48 - rov 62190 wireless communication path selected 5:14:07 - set point for rov 62190 set to 0% open 5:15:04 - rov 62190 valve in travel 5:15:04 - rov 62190 59% open - alarm generated for position 5:16:32 - transco 134th street flow is 2517 dth/h 5:16:54 - transco 134th street pressure is 346 psig - alarm for hi pressure 5:17:17 - rov 62190 0% open - alarm for full closure 5:17:17 - rov 62190 north (upstream) pressure is 375.7 psig - alarm for hi hi pressure. Trending shows an instantaneous pressure peak at 396 psig; maop + 10% exceeded for 20 seconds (>385 psig) 5:17:22 - set point for rov 62190 set to 100% open 5:17:32 - rov 62190 in travel 5:18:05 - transco 134th street pressure is 288 psig - pressure in normal range 5:18:44 - rov 62190 north (upstream) pressure is 288 psig - pressure in normal range 5:19:58 - rov 62190 100% open due to conflicting pressure readings on the same line the controller notified gas engineering during normal business hours on 9/23/15. Pressure control (pc) instruments and controls (I/c) verified transducer calibration for both transducers on 9/24/15. Transco williams was contacted to extract station data on 9/24/15; transco stated that physical data would be available within 24 hours. On 9/25/15 information from transco indicated a discrete high pressure alarm in excess of 360 psig and travel of the first of two over pressure protection (opp) devices set at 365 psig and 370 psig respectively. Due to the high probability of an event, central information group (cig), public service commission (psc), and national reporting center (nrc) were notified on 9/25. Post-analysis found that internal specification g-11810-29 "procedure for inspection and maintenance of gas transmission pipelines" made no provision for time periods between valve movements to allow for system stabilization. Revision g-11810-30a incorporated a 15 minute stabilization time for all valve movements for rov full-closure inspections. Procedural practice also incorporated reducing flow to 0 dth/h prior to any full-closure test of a rov.
| Report Received Date | 2015-09-28 00:00:00 |
|---|---|
| Iyear | 2015 |
| Report Number | 20150116 |
| Supplemental Number | 17343 |
| 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 | 2015-09-23 05:17:00 |
| Location Latitude | 40.822217 Google Maps OpenStreetMap |
| Location Longitude | -73.958953 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1129387 NRC Report How to search |
| Nrc Rpt Datetime | 2015-09-25 15:36:00 |
| Unintentional Release | 0 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Periodic Testing Of A Remote Operated Valve (Rov) |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2015-09-23 05:17:00 |
| On Site Datetime | 2015-09-23 05:17:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ny |
| Onshore Postal Code | 10031 |
| Onshore City Name | New York |
| Onshore County Name | New York |
| Designated Location | Milepost |
| Designated Name | Rov-62190 |
| Pipe Fac Name | Con Edison |
| Segment Name | M1 |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Underground |
| Incident Area Subtype | In Underground Enclosed Space (E.g. Vault) |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Valve |
| Valve Type | Mainline |
| Valve Mainline Type | Ball |
| Valve Manufacturer | Cameron |
| Installation Year | 2013 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Exceeded Maximum Allowable Operating Pressure (Maop) Upstream Of Valve. Valve Was Closed As Part Of Periodic Remote Testing Procedure |
| Class Location Type | Class 4 Location |
| Could Be Hca | Yes |
| Determination Method | Method1 |
| Pir Radius | 387 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 0 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 0 |
| Accident Psig | 396 |
| Mop Psig | 350 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Accident Pressure | Pressure Exceeded The Applicable Allowance In 192.201 |
| Pressure Restriction Ind | No |
| Upstream Valve Type Ind | Automatic |
| Downstream Valve Type Ind | Remotely Controlled |
| Length Segment Isolated | 87 |
| Internal Inspection Ind | No |
| Diameter Change Ind | Yes |
| Unsuitable Mainline Ind | Yes |
| Tight Mitered Ind | Yes |
| Operation Complications Ind | Yes |
| Other Complications Ind | Yes |
| Inspect Comp Details | No Launchers |
| Pipeline Function | Transmission System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | Yes |
| Scada Conf Ind | No |
| Accident Identifier | Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations) |
| 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 | It is a normally performed test that will be re-evaluated. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Incorrect Operation |
| Cause Details | Pipeline Or Equipment Overpressured |
| Operation Type | Pipeline Or Equipment Overpressured |
| Related Inadequate Proc Ind | Yes |
| Category Type | Routine Maintenance |
| Operator Qualification Ind | Yes |
| Qualified Individuals | Yes, They Were Qualified For The Task(S) |
| Preparer Name | G******* M******* |
| Preparer Title | Department Manager |
| Preparer Email | M********@c****.com |
| Preparer Telephone | 718 794 2873 |
| Authorizer Name | A****** L*** |
| Authorizer Title | Chief Engineer |
| Authorizer Telephone | 7188391759 |
| Authorizer Email | L****@c****.com |
| Narrative | On september 23, 2015 a biennial remote closure test of remotely operated valve (rov) 62190 was performed; as part of this procedure, two closures are completed to first test a frame relay communication path, followed by a wireless communication path. Initial conditions were rov 62190 in the 100% open condition on frame relay communications. Flow through the transco 134th street gate station upstream of the rov was 1700 dth/h. The sequence of events is as follows: 5:07:55 - set point for rov 62190 set to 0% open 5:08:02 - rov 62190 in travel 5:09:10 - rov 62190 43% open - alarm for position 5:10:11 - rov 62190 0% open - alarm for full closure 5:10:15 - set point for rov 62190 set to 100% open 5:10:24 - rov 62190 in travel 5:12:14 - rov 62190 100% open 5:13:48 - rov 62190 wireless communication path selected 5:14:07 - set point for rov 62190 set to 0% open 5:15:04 - rov 62190 valve in travel 5:15:04 - rov 62190 59% open - alarm generated for position 5:16:32 - transco 134th street flow is 2517 dth/h 5:16:54 - transco 134th street pressure is 346 psig - alarm for hi pressure 5:17:17 - rov 62190 0% open - alarm for full closure 5:17:17 - rov 62190 north (upstream) pressure is 375.7 psig - alarm for hi hi pressure. Trending shows an instantaneous pressure peak at 396 psig; maop + 10% exceeded for 20 seconds (>385 psig) 5:17:22 - set point for rov 62190 set to 100% open 5:17:32 - rov 62190 in travel 5:18:05 - transco 134th street pressure is 288 psig - pressure in normal range 5:18:44 - rov 62190 north (upstream) pressure is 288 psig - pressure in normal range 5:19:58 - rov 62190 100% open due to conflicting pressure readings on the same line the controller notified gas engineering during normal business hours on 9/23/15. Pressure control (pc) instruments and controls (I/c) verified transducer calibration for both transducers on 9/24/15. Transco williams was contacted to extract station data on 9/24/15; transco stated that physical data would be available within 24 hours. On 9/25/15 information from transco indicated a discrete high pressure alarm in excess of 360 psig and travel of the first of two over pressure protection (opp) devices set at 365 psig and 370 psig respectively. Due to the high probability of an event, central information group (cig), public service commission (psc), and national reporting center (nrc) were notified on 9/25. Post-analysis found that internal specification g-11810-29 "procedure for inspection and maintenance of gas transmission pipelines" made no provision for time periods between valve movements to allow for system stabilization. Revision g-11810-30a incorporated a 15 minute stabilization time for all valve movements for rov full-closure inspections. Procedural practice also incorporated reducing flow to 0 dth/h prior to any full-closure test of a rov. |
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