Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2015-12-19 — NH
Operator
New Hampshire Gas Corp
Cause
Equipment Failure
Commodity
—
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2015-12-19 08:51
Report number
Location
NH, CHESHIRE
Narrative
Liberty utilities and a third party monitoring company reported that their monitoring had detected a problem with the blowers that provide air to the propane/air mixing system at the plant. This mechanical failure resulted in incorrect air to propane mixture volumes being sent into the distribution system. Liberty utilities resources responded and corrected the malfunction, mitigated additional hazards and commenced customer awareness and notifications.
Detailed record list
Occurred At
2015-12-19 08:51:00
Year
2015
Report Received Date
2016-01-15 00:00:00
Iyear
2015.0
Report Number
20160004.0
Supplemental Number
16223.0
Report Type
Original Final
Operator Id
31265
Name
New Hampshire Gas Corp
Operator Street Address
15 Buttrick Road
Operator City Name
Londonderry
Operator State Abbreviation
NH
Operator Postal Code
03053
Local Datetime
2015-12-19 08:51:00
Location Street Address
207 Emerald St. 03431
Location City Name
Keene
Location County Name
Cheshire
Location State Abbreviation
NH
Location Postal Code
03431
Location Latitude
42.9336
Location Longitude
-72.2781
Nrc Rpt Datetime
2015-12-19 19:54:00
Nrc Rpt Num
1136250
Unintentional Release
3.6
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0.0
Incident Identified Datetime
2015-12-19 08:51:00
On Site Datetime
2015-12-19 09:03:00
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Inside A Building
Crossing
No
Pipe Facility Type
Privately Owned
System Part Involved
Other
System Part Details
Blowers
Installation Year
2003.0
Material Involved
Other
Material Details
Mechanical Air Supply Blower
Release Type
Other
Release Type Details
Liberty Utilities Technicians Purged High Concentration Btu Propane From System At 10 Designated Locations.
Class Location Type
Class 4 Location
Est Cost Oper Paid
0.0
Est Cost Prop Damage
0.0
Est Cost Emergency
41986.0
Est Cost Other
50000.0
Est Cost Other Details
Local City And Towns Emergency Responses Reimbursement Is Yet To Be Determined.
Est Cost Unintentional Release
76.0
Prpty
92062.0
Commercial Affected
35.0
Industrial Affected
0.0
Residences Affected
54.0
Accident Psig
3.5
Normal Psig
3.5
Mop Psig
5.0
Accident Pressure
Pressure Did Not Exceed Maop
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
Yes
Scada Conf Ind
Yes
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
Propane scada only monitors system alarms, there are no other controller adjustments or activities.
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
Other Control Relief Ind
Yes
Other Control Relief Details
Electrical Power Fluctuations Caused The Adjustable Speed Drives To Trip, Shutting Down Control Supply Air Blowers To System.
Preparer Name
R****** M*******
Preparer Title
Program Manager- Compliance
Preparer Email
R***************@l***************.com
Preparer Telephone
603-216-3664
Preparer Fax
603-421-1768
Authorizer Name
L** C***
Authorizer Title
Manager-Compliance
Authorizer Telephone
603-216-3528
Authorizer Email
L*******@l***************.com
Narrative
Liberty utilities and a third party monitoring company reported that their monitoring had detected a problem with the blowers that provide air to the propane/air mixing system at the plant. This mechanical failure resulted in incorrect air to propane mixture volumes being sent into the distribution system. Liberty utilities resources responded and corrected the malfunction, mitigated additional hazards and commenced customer awareness and notifications.
| Occurred At | 2015-12-19 08:51:00 |
|---|---|
| Year | 2015 |
| Report Received Date | 2016-01-15 00:00:00 |
| Iyear | 2015.0 |
| Report Number | 20160004.0 |
| Supplemental Number | 16223.0 |
| Report Type | Original Final |
| Operator Id | 31265 PHMSA Enforcement |
| Name | New Hampshire Gas Corp |
| Operator Street Address | 15 Buttrick Road |
| Operator City Name | Londonderry |
| Operator State Abbreviation | NH |
| Operator Postal Code | 03053 |
| Local Datetime | 2015-12-19 08:51:00 |
| Location Street Address | 207 Emerald St. 03431 |
| Location City Name | Keene |
| Location County Name | Cheshire |
| Location State Abbreviation | NH |
| Location Postal Code | 03431 |
| Location Latitude | 42.9336 Google Maps OpenStreetMap |
| Location Longitude | -72.2781 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2015-12-19 19:54:00 |
| Nrc Rpt Num | 1136250 NRC Report How to search |
| Unintentional Release | 3.6 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0.0 |
| Incident Identified Datetime | 2015-12-19 08:51:00 |
| On Site Datetime | 2015-12-19 09:03:00 |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Inside A Building |
| Crossing | No |
| Pipe Facility Type | Privately Owned |
| System Part Involved | Other |
| System Part Details | Blowers |
| Installation Year | 2003.0 |
| Material Involved | Other |
| Material Details | Mechanical Air Supply Blower |
| Release Type | Other |
| Release Type Details | Liberty Utilities Technicians Purged High Concentration Btu Propane From System At 10 Designated Locations. |
| Class Location Type | Class 4 Location |
| Est Cost Oper Paid | 0.0 |
| Est Cost Prop Damage | 0.0 |
| Est Cost Emergency | 41986.0 |
| Est Cost Other | 50000.0 |
| Est Cost Other Details | Local City And Towns Emergency Responses Reimbursement Is Yet To Be Determined. |
| Est Cost Unintentional Release | 76.0 |
| Prpty | 92062.0 |
| Commercial Affected | 35.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 54.0 |
| Accident Psig | 3.5 |
| Normal Psig | 3.5 |
| Mop Psig | 5.0 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | Yes |
| Scada Conf Ind | Yes |
| 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 | Propane scada only monitors system alarms, there are no other controller adjustments or activities. |
| 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 |
| Other Control Relief Ind | Yes |
| Other Control Relief Details | Electrical Power Fluctuations Caused The Adjustable Speed Drives To Trip, Shutting Down Control Supply Air Blowers To System. |
| Preparer Name | R****** M******* |
| Preparer Title | Program Manager- Compliance |
| Preparer Email | R***************@l***************.com |
| Preparer Telephone | 603-216-3664 |
| Preparer Fax | 603-421-1768 |
| Authorizer Name | L** C*** |
| Authorizer Title | Manager-Compliance |
| Authorizer Telephone | 603-216-3528 |
| Authorizer Email | L*******@l***************.com |
| Narrative | Liberty utilities and a third party monitoring company reported that their monitoring had detected a problem with the blowers that provide air to the propane/air mixing system at the plant. This mechanical failure resulted in incorrect air to propane mixture volumes being sent into the distribution system. Liberty utilities resources responded and corrected the malfunction, mitigated additional hazards and commenced customer awareness and notifications. |
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