ENS 46206: Difference between revisions
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| event date = 08/25/2010 08:30 EDT | | event date = 08/25/2010 08:30 EDT | ||
| last update date = 08/25/2010 | | last update date = 08/25/2010 | ||
| title = Offsite Notification - Release | | title = Offsite Notification - Release of Hydrogen Gas in Excess of the Reportable Quantity of Ten Pounds | ||
| event text = On August 25, 2010 [the licensee] made a notification to] the Massachusetts Department of Environmental Protection and the Plymouth Massachusetts Fire Department in accordance with 310CMR40.300, Massachusetts Contingency Plan Notification of Oil and Hazardous Material; Identification and Listing of Oil and Hazardous Material. [The licensee made the notification] due to a release of hydrogen gas to the environment exceeding the reportable quantity of ten pounds via the designed system release path. The release occurred when restoration of a system vacuum pump following planned maintenance resulted in higher than normal system makeup rates. Combustible gas sampling of equipment areas confirmed that the excess hydrogen gas had been released to the environment via a remote roof vent designed to continuously exhaust [hydrogen] removed from the seal oil system by the vacuum pump. The release of hydrogen gas was secured when the vacuum pump was removed from service. The estimated quantity of hydrogen gas released was approximately twenty pounds. This event posed no danger to the health and safety of plant personnel or members of the general public. | | event text = On August 25, 2010 [the licensee] made a notification to] the Massachusetts Department of Environmental Protection and the Plymouth Massachusetts Fire Department in accordance with 310CMR40.300, Massachusetts Contingency Plan Notification of Oil and Hazardous Material; Identification and Listing of Oil and Hazardous Material. [The licensee made the notification] due to a release of hydrogen gas to the environment exceeding the reportable quantity of ten pounds via the designed system release path. The release occurred when restoration of a system vacuum pump following planned maintenance resulted in higher than normal system makeup rates. Combustible gas sampling of equipment areas confirmed that the excess hydrogen gas had been released to the environment via a remote roof vent designed to continuously exhaust [hydrogen] removed from the seal oil system by the vacuum pump. The release of hydrogen gas was secured when the vacuum pump was removed from service. The estimated quantity of hydrogen gas released was approximately twenty pounds. This event posed no danger to the health and safety of plant personnel or members of the general public. | ||
The NRC Senior Resident Inspector is on-site and has been notified. | The NRC Senior Resident Inspector is on-site and has been notified. | ||
Latest revision as of 21:08, 1 March 2018
| Where | |
|---|---|
| Pilgrim Massachusetts (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | |
| Time - Person (Reporting Time:+-1.87 h-0.0779 days <br />-0.0111 weeks <br />-0.00256 months <br />) | |
| Opened: | Stan Paul 10:38 Aug 25, 2010 |
| NRC Officer: | Pete Snyder |
| Last Updated: | Aug 25, 2010 |
| 46206 - NRC Website
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