Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2010-12-27 — NV
Operator
Nv Energy
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$8,037
Incident datetime
2010-12-27 07:48
Report number
Location
NV, WASHOE COUNTY
Narrative
On 12/27/2010 at 0748 hrs. City of reno informs nv energy dispatch that a phone message was left on 12/25/2010 reporting a gas odor on south meadows parkway between double r blvd. And double diamond parkway. Nv energy dispatch creates work order. At 0953 hrs a passerby reports a gas odor at south meadows parkway and double r blvd. To nv energy dispatch. Nv energy personnel arrive on scene at 1100 hrs. To begin leak investigation. At 1223 hrs. Nv energy personnel discover a grade 1 gas leak and request additional personnel for pinpointing and repairs. Area is made safe by nv energy personnel and no evacuations are required. Leak is determined to be originating from a 2' valve facing north. Nv energy begins aerating the soil due to underground gas migration. Traffic control and locates are requested. Repairs are started at 1500 hrs. Gas leak is stopped at 1910 hrs. Repairs are completed at 2040 hrs. Nv energy continues aerating soil 24 hours per day from 12/27/2010 to 1/8/2011 at 830 hrs. Soil aeration costs push the incident costs above the $50,000 threshold. Based on a letter from kerotest, the valve manufacturer, dated july 17, 2002, nv energy believes the failure of the valve bonnet bolts is due to stress corrosion cracking. The affected years of manufacture are 1986-1996 as identified by kerotest. A possible contributing factor was a lack of coating on the bonnet bolt. Attachment: kerotest letter dated july 17, 2002
Detailed record list
Occurred At
2010-12-27 07:48:00
Year
2010
Report Received Date
2011-02-04 00:00:00
Iyear
2010.0
Report Number
20110019.0
Supplemental Number
15452.0
Report Type
Supplemental Final
Operator Id
18308
Name
Nv Energy
Operator Street Address
Po Box 10100
Operator City Name
Reno Washoe
Operator State Abbreviation
NV
Operator Postal Code
89520
Local Datetime
2010-12-27 07:48:00
Location Street Address
710 South Meadows Parkway
Location City Name
Reno
Location County Name
Washoe County
Location State Abbreviation
NV
Location Postal Code
89521-4877
Location Latitude
39.43855
Location Longitude
-119.757737
Nrc Rpt Datetime
2011-01-06 13:50:00
Nrc Rpt Num
963949
Commodity Released Type
Natural Gas
Unintentional Release
14.0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0.0
Incident Identified Datetime
2010-12-27 07:48:00
On Site Datetime
2010-12-27 11:00:00
Federal
No
Location Type
Public Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Crossing
No
Pipe Facility Type
Privately Owned
System Part Involved
Other
System Part Details
Valve
Installation Year
1996.0
Material Involved
Other
Material Details
Valve Bonnet And Bolts
Release Type
Leak
Leak Type
Connection Failure
Leak Type Other
Valve Bonnet To Body Leak
Class Location Type
Class 3 Location
Est Cost Oper Paid
0.0
Est Cost Prop Damage
8037.0
Est Cost Emergency
67397.0
Est Cost Other
0.0
Est Cost Unintentional Release
60.0
Prpty
75494.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
0.0
Accident Psig
85.0
Normal Psig
85.0
Mop Psig
90.0
Accident Pressure
Pressure Did Not Exceed Maop
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Accident Identifier
Notification From Public
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
Scada system is used for system pressure monitoring. This gas leak did not impact system pressures.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
External Corrosion
Internal External
External Corrosion
Visual Exam Results
Other
Visual Exam Details
Bonnet On Valve Became Loose And Leaked Due To Failure Of Bolts.
Other Corrosion Ind
Yes
Corrosion Type Details
Stress Corrosion Cracking
Field Exam Basis Ind
Yes
Other Basis Ind
Yes
Corrosion Basis Details
Kerotest Valve Letter Dated July 17, 2002 (See Section H Below)
Underground Location
Yes
Under Cathodic Protection Ind
Yes
Cathodic Pro Start Year
1996
Shielding Evident
No
Cathodic Survey Type
Yes
Cp Annual Survey Ind
Yes
Cp Annual Survey Year
2010
Prior Damage
No
Preparer Name
J** W******
Preparer Title
Supervisor Gas Compliance Operations
Preparer Email
J*******@n*******.com
Preparer Telephone
775-834-7850
Preparer Fax
775-834-1225
Authorizer Name
J*** O****
Authorizer Title
Director Gas Business
Authorizer Telephone
775-834-5644
Authorizer Email
J*****@n*******.com
Narrative
On 12/27/2010 at 0748 hrs. City of reno informs nv energy dispatch that a phone message was left on 12/25/2010 reporting a gas odor on south meadows parkway between double r blvd. And double diamond parkway. Nv energy dispatch creates work order. At 0953 hrs a passerby reports a gas odor at south meadows parkway and double r blvd. To nv energy dispatch. Nv energy personnel arrive on scene at 1100 hrs. To begin leak investigation. At 1223 hrs. Nv energy personnel discover a grade 1 gas leak and request additional personnel for pinpointing and repairs. Area is made safe by nv energy personnel and no evacuations are required. Leak is determined to be originating from a 2' valve facing north. Nv energy begins aerating the soil due to underground gas migration. Traffic control and locates are requested. Repairs are started at 1500 hrs. Gas leak is stopped at 1910 hrs. Repairs are completed at 2040 hrs. Nv energy continues aerating soil 24 hours per day from 12/27/2010 to 1/8/2011 at 830 hrs. Soil aeration costs push the incident costs above the $50,000 threshold. Based on a letter from kerotest, the valve manufacturer, dated july 17, 2002, nv energy believes the failure of the valve bonnet bolts is due to stress corrosion cracking. The affected years of manufacture are 1986-1996 as identified by kerotest. A possible contributing factor was a lack of coating on the bonnet bolt. Attachment: kerotest letter dated july 17, 2002
| Occurred At | 2010-12-27 07:48:00 |
|---|---|
| Year | 2010 |
| Report Received Date | 2011-02-04 00:00:00 |
| Iyear | 2010.0 |
| Report Number | 20110019.0 |
| Supplemental Number | 15452.0 |
| Report Type | Supplemental Final |
| Operator Id | 18308 PHMSA Enforcement |
| Name | Nv Energy |
| Operator Street Address | Po Box 10100 |
| Operator City Name | Reno Washoe |
| Operator State Abbreviation | NV |
| Operator Postal Code | 89520 |
| Local Datetime | 2010-12-27 07:48:00 |
| Location Street Address | 710 South Meadows Parkway |
| Location City Name | Reno |
| Location County Name | Washoe County |
| Location State Abbreviation | NV |
| Location Postal Code | 89521-4877 |
| Location Latitude | 39.43855 Google Maps OpenStreetMap |
| Location Longitude | -119.757737 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2011-01-06 13:50:00 |
| Nrc Rpt Num | 963949 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 14.0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0.0 |
| Incident Identified Datetime | 2010-12-27 07:48:00 |
| On Site Datetime | 2010-12-27 11:00:00 |
| Federal | No |
| Location Type | Public Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Crossing | No |
| Pipe Facility Type | Privately Owned |
| System Part Involved | Other |
| System Part Details | Valve |
| Installation Year | 1996.0 |
| Material Involved | Other |
| Material Details | Valve Bonnet And Bolts |
| Release Type | Leak |
| Leak Type | Connection Failure |
| Leak Type Other | Valve Bonnet To Body Leak |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 0.0 |
| Est Cost Prop Damage | 8037.0 |
| Est Cost Emergency | 67397.0 |
| Est Cost Other | 0.0 |
| Est Cost Unintentional Release | 60.0 |
| Prpty | 75494.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 0.0 |
| Accident Psig | 85.0 |
| Normal Psig | 85.0 |
| Mop Psig | 90.0 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Accident Identifier | Notification From Public |
| 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 | Scada system is used for system pressure monitoring. This gas leak did not impact system pressures. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | External Corrosion |
| Internal External | External Corrosion |
| Visual Exam Results | Other |
| Visual Exam Details | Bonnet On Valve Became Loose And Leaked Due To Failure Of Bolts. |
| Other Corrosion Ind | Yes |
| Corrosion Type Details | Stress Corrosion Cracking |
| Field Exam Basis Ind | Yes |
| Other Basis Ind | Yes |
| Corrosion Basis Details | Kerotest Valve Letter Dated July 17, 2002 (See Section H Below) |
| Underground Location | Yes |
| Under Cathodic Protection Ind | Yes |
| Cathodic Pro Start Year | 1996 |
| Shielding Evident | No |
| Cathodic Survey Type | Yes |
| Cp Annual Survey Ind | Yes |
| Cp Annual Survey Year | 2010 |
| Prior Damage | No |
| Preparer Name | J** W****** |
| Preparer Title | Supervisor Gas Compliance Operations |
| Preparer Email | J*******@n*******.com |
| Preparer Telephone | 775-834-7850 |
| Preparer Fax | 775-834-1225 |
| Authorizer Name | J*** O**** |
| Authorizer Title | Director Gas Business |
| Authorizer Telephone | 775-834-5644 |
| Authorizer Email | J*****@n*******.com |
| Narrative | On 12/27/2010 at 0748 hrs. City of reno informs nv energy dispatch that a phone message was left on 12/25/2010 reporting a gas odor on south meadows parkway between double r blvd. And double diamond parkway. Nv energy dispatch creates work order. At 0953 hrs a passerby reports a gas odor at south meadows parkway and double r blvd. To nv energy dispatch. Nv energy personnel arrive on scene at 1100 hrs. To begin leak investigation. At 1223 hrs. Nv energy personnel discover a grade 1 gas leak and request additional personnel for pinpointing and repairs. Area is made safe by nv energy personnel and no evacuations are required. Leak is determined to be originating from a 2' valve facing north. Nv energy begins aerating the soil due to underground gas migration. Traffic control and locates are requested. Repairs are started at 1500 hrs. Gas leak is stopped at 1910 hrs. Repairs are completed at 2040 hrs. Nv energy continues aerating soil 24 hours per day from 12/27/2010 to 1/8/2011 at 830 hrs. Soil aeration costs push the incident costs above the $50,000 threshold. Based on a letter from kerotest, the valve manufacturer, dated july 17, 2002, nv energy believes the failure of the valve bonnet bolts is due to stress corrosion cracking. The affected years of manufacture are 1986-1996 as identified by kerotest. A possible contributing factor was a lack of coating on the bonnet bolt. Attachment: kerotest letter dated july 17, 2002 |
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