ENS 46967: Difference between revisions
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| event date = 06/16/2011 13:09 EDT | | event date = 06/16/2011 13:09 EDT | ||
| last update date = 06/17/2011 | | last update date = 06/17/2011 | ||
| title = Chemical Release | | title = Chemical Release from Intake Pumping Station. | ||
| event text = A notification of the event discussed below was made to the Tennessee Department of Environment and Conservation (TDEC) at approximately 09:48 [hrs EDT] on June 17,2011. As a result of the notification made to the state, NRC is being notified in accordance with 10 CFR 50.72(b)(2)(xi), 'News Release or Notification of Other Government Agency.' | | event text = A notification of the event discussed below was made to the Tennessee Department of Environment and Conservation (TDEC) at approximately 09:48 [hrs EDT] on June 17,2011. As a result of the notification made to the state, NRC is being notified in accordance with 10 CFR 50.72(b)(2)(xi), 'News Release or Notification of Other Government Agency.' | ||
On June 16, 2011, a chemical treatment of the raw water system for Watts Bar Nuclear Plant (WBN) was underway. The treatment was a routine injection of biocide (Sodium Hypochlorite and Flogard MS6237) for the treatment of microbiologically induced corrosion (MIC) and to inhibit the growth of asiatic clams. At approximately 13:09 [hrs EDT] on June 16, 2011, WBN personnel noticed that a small stream of water was releasing through the splash guard of a trough on the outside (lake side) of the Intake Pumping Station (IRS) and entering the Intake Forebay. This initial leak was secured by approximately 14:30. At approximately 14:35, a second leak from a broken pipe was identified. The second leak was terminated at approximately 16:05. The cause of the initial leak was determined to be a tree growing in a trough in the intake structure and degraded sealant on the trough's splash guard. TVA's [Tennessee Valley Authority] biologist performed a survey of the intake channel and the river downstream from the plant and found no dead fish or abnormal bird activity. TVA's review of the chemical release to the lake determined that no Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) reportable quantities were exceeded. | On June 16, 2011, a chemical treatment of the raw water system for Watts Bar Nuclear Plant (WBN) was underway. The treatment was a routine injection of biocide (Sodium Hypochlorite and Flogard MS6237) for the treatment of microbiologically induced corrosion (MIC) and to inhibit the growth of asiatic clams. At approximately 13:09 [hrs EDT] on June 16, 2011, WBN personnel noticed that a small stream of water was releasing through the splash guard of a trough on the outside (lake side) of the Intake Pumping Station (IRS) and entering the Intake Forebay. This initial leak was secured by approximately 14:30. At approximately 14:35, a second leak from a broken pipe was identified. The second leak was terminated at approximately 16:05. The cause of the initial leak was determined to be a tree growing in a trough in the intake structure and degraded sealant on the trough's splash guard. TVA's [Tennessee Valley Authority] biologist performed a survey of the intake channel and the river downstream from the plant and found no dead fish or abnormal bird activity. TVA's review of the chemical release to the lake determined that no Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) reportable quantities were exceeded. | ||
Latest revision as of 22:06, 1 March 2018
| Where | |
|---|---|
Watts Bar  Tennessee (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | |
| Time - Person (Reporting Time:+19.92 h0.83 days <br />0.119 weeks <br />0.0273 months <br />) | |
| Opened: | Rick Bowling 13:04 Jun 17, 2011 |
| NRC Officer: | John Knoke |
| Last Updated: | Jun 17, 2011 |
| 46967 - NRC Website
| |