Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2019-06-07 — AK
Operator
Alyeska Pipeline Service Co
Cause
Equipment Failure
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2019-06-07 12:29
Report number
Location
AK
Narrative
On june 7, 2019, during a short duration shutdown for maintenance of the trans alaska pipeline system security discovered approximately 4 gallons of crude had leaked from check valve (ckv) 110 located at pipeline mile post (plmp) 701.9. All of the crude was captured in containment with no leak to ground. The check valve was leaking at an estimated 4 cups per minute at the time. Alyeska initiated mitigations and repairs. The valve continued to leak at diminishing rates with corrective actions such as grease packing and valve operation until thursday june 13 when the actuator was removed. All crude was captured and no soil or water contamination occurred. A temporary repair was completed on 6/17 to encapsulate the valve shaft extension. Alyeska remained in communication with the local PHMSA office, inspections have occurred and are ongoing. Update: alyeska has permanently repaired the actuator and valve shaft extension as of august 9, 2019. Further review of other locations for extent of condition revealed the potential for failures at check valves 111, 114, and 95a. These locations were repaired with all work completed august 11, 2019. No additional action or repair is needed.
Detailed record list
Report Received Date
2019-06-18 00:00:00
Iyear
2019
Report Number
20190193
Supplemental Number
32761
Report Type
Supplemental Final
Operator Id
26149
Name
Alyeska Pipeline Service Co
Operator Street Address
Pob 196660 Ms 502
Operator City Name
Anchorage
Operator State Abbreviation
AK
Operator Postal Code
99519
Local Datetime
2019-06-07 12:29:00
Location Latitude
61.897097
Location Longitude
-145.298884
Commodity Released Type
Crude Oil
Unintentional Release Bbls
4
Recovered Bbls
4
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Ground Patrol By Operator Or Its Contractor
Operator Type
Contractor Working For The Operator
Incident Identified Datetime
2019-06-07 12:29:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
No
Shutdown Explain
The Leak Is Contained.
On Site Datetime
2019-06-07 12:29:00
Nrc Rpt Datetime
2019-06-07 13:28:00
Nrc Rpt Num
1248199
Ignite Ind
No
Explode Ind
No
Upstream Valve Type Ind
Automatic
Downstream Valve Type Ind
Automatic
Num Pub Evacuated
0
Pipe Fac Name
Check Valve 110
Segment Name
Check Valve 110
Onshore State Abbreviation
Ak
Onshore Postal Code
99573
Onshore City Name
Not Within A Municipality
Onshore County Name
Not Within A County Or Parish
Designated Location
Milepost/valve Station
Designated Name
Plmp 701.79
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Valve
Valve Type
Mainline
Valve Mainline Type
Check
Valve Manufacturer
Grove
Installation Year
1975
Manufactured Year
1970
Material Involved
Material Other Than Carbon Steel
Material Details
Stem Seal
Release Type
Leak
Leak Type
Seal Or Packing
Wildlife Impact Ind
No
Soil Contamination
No
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
Yes
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
0
Est Cost Prop Damage
0
Est Cost Emergency
41292
Est Cost Environmental
0
Est Cost Other
0
Prpty
41292
Accident Psig
639
Mop Psig
816
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
82156
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
< 20% Smys Regulated Transmission
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Cpm In Place Ind
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
No
Cpm Conf Ind
No
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
The leak was active and discovered during security rounds. Check valves are not controlled by alyeska's control room staff. No detailed investigation is warranted. Additionally the leak was not large enough to be detected by the system and did not alarm in the control room.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Non-Threaded Connection Failure
Eq Failure Type
Non-Threaded Connection Failure
Other Non Threaded Ind
Seal (Not Pump Seal) Or Packing
Eq Additional Other Ind
Yes
Eq Additional Other Details
Valve Seal Failure At Installed Actuator.
Preparer Name
J******* H******
Preparer Title
Compliance Manager
Preparer Email
J**********@a***************.com
Preparer Telephone
9077878858
Prepared Date
2019-09-26 00:00:00
Authorizer Name
A****** I******
Authorizer Telephone
9077878061
Authorizer Title
Director Health Safety Environment And Compliance
Authorizer Email
A**************@a***************.com
Narrative
On june 7, 2019, during a short duration shutdown for maintenance of the trans alaska pipeline system security discovered approximately 4 gallons of crude had leaked from check valve (ckv) 110 located at pipeline mile post (plmp) 701.9. All of the crude was captured in containment with no leak to ground. The check valve was leaking at an estimated 4 cups per minute at the time. Alyeska initiated mitigations and repairs. The valve continued to leak at diminishing rates with corrective actions such as grease packing and valve operation until thursday june 13 when the actuator was removed. All crude was captured and no soil or water contamination occurred. A temporary repair was completed on 6/17 to encapsulate the valve shaft extension. Alyeska remained in communication with the local PHMSA office, inspections have occurred and are ongoing. Update: alyeska has permanently repaired the actuator and valve shaft extension as of august 9, 2019. Further review of other locations for extent of condition revealed the potential for failures at check valves 111, 114, and 95a. These locations were repaired with all work completed august 11, 2019. No additional action or repair is needed.
| Report Received Date | 2019-06-18 00:00:00 |
|---|---|
| Iyear | 2019 |
| Report Number | 20190193 |
| Supplemental Number | 32761 |
| Report Type | Supplemental Final |
| Operator Id | 26149 PHMSA Enforcement |
| Name | Alyeska Pipeline Service Co |
| Operator Street Address | Pob 196660 Ms 502 |
| Operator City Name | Anchorage |
| Operator State Abbreviation | AK |
| Operator Postal Code | 99519 |
| Local Datetime | 2019-06-07 12:29:00 |
| Location Latitude | 61.897097 Google Maps OpenStreetMap |
| Location Longitude | -145.298884 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 4 |
| Recovered Bbls | 4 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Ground Patrol By Operator Or Its Contractor |
| Operator Type | Contractor Working For The Operator |
| Incident Identified Datetime | 2019-06-07 12:29:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | The Leak Is Contained. |
| On Site Datetime | 2019-06-07 12:29:00 |
| Nrc Rpt Datetime | 2019-06-07 13:28:00 |
| Nrc Rpt Num | 1248199 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Upstream Valve Type Ind | Automatic |
| Downstream Valve Type Ind | Automatic |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Check Valve 110 |
| Segment Name | Check Valve 110 |
| Onshore State Abbreviation | Ak |
| Onshore Postal Code | 99573 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Not Within A County Or Parish |
| Designated Location | Milepost/valve Station |
| Designated Name | Plmp 701.79 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Valve |
| Valve Type | Mainline |
| Valve Mainline Type | Check |
| Valve Manufacturer | Grove |
| Installation Year | 1975 |
| Manufactured Year | 1970 |
| Material Involved | Material Other Than Carbon Steel |
| Material Details | Stem Seal |
| Release Type | Leak |
| Leak Type | Seal Or Packing |
| Wildlife Impact Ind | No |
| Soil Contamination | No |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | Yes |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 0 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 41292 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 41292 |
| Accident Psig | 639 |
| Mop Psig | 816 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 82156 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | < 20% Smys Regulated Transmission |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Cpm In Place Ind | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | No |
| Cpm Conf Ind | No |
| 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 | The leak was active and discovered during security rounds. Check valves are not controlled by alyeska's control room staff. No detailed investigation is warranted. Additionally the leak was not large enough to be detected by the system and did not alarm in the control room. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Non-Threaded Connection Failure |
| Eq Failure Type | Non-Threaded Connection Failure |
| Other Non Threaded Ind | Seal (Not Pump Seal) Or Packing |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Valve Seal Failure At Installed Actuator. |
| Preparer Name | J******* H****** |
| Preparer Title | Compliance Manager |
| Preparer Email | J**********@a***************.com |
| Preparer Telephone | 9077878858 |
| Prepared Date | 2019-09-26 00:00:00 |
| Authorizer Name | A****** I****** |
| Authorizer Telephone | 9077878061 |
| Authorizer Title | Director Health Safety Environment And Compliance |
| Authorizer Email | A**************@a***************.com |
| Narrative | On june 7, 2019, during a short duration shutdown for maintenance of the trans alaska pipeline system security discovered approximately 4 gallons of crude had leaked from check valve (ckv) 110 located at pipeline mile post (plmp) 701.9. All of the crude was captured in containment with no leak to ground. The check valve was leaking at an estimated 4 cups per minute at the time. Alyeska initiated mitigations and repairs. The valve continued to leak at diminishing rates with corrective actions such as grease packing and valve operation until thursday june 13 when the actuator was removed. All crude was captured and no soil or water contamination occurred. A temporary repair was completed on 6/17 to encapsulate the valve shaft extension. Alyeska remained in communication with the local PHMSA office, inspections have occurred and are ongoing. Update: alyeska has permanently repaired the actuator and valve shaft extension as of august 9, 2019. Further review of other locations for extent of condition revealed the potential for failures at check valves 111, 114, and 95a. These locations were repaired with all work completed august 11, 2019. No additional action or repair is needed. |
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