ENS 43828: Difference between revisions
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StriderTol (talk | contribs) (Created page by program invented by Mark Hawes) |
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
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| event date = 12/06/2007 15:50 CST | | event date = 12/06/2007 15:50 CST | ||
| last update date = 12/07/2007 | | last update date = 12/07/2007 | ||
| title = Unplanned Safety System Actuation | | title = Unplanned Safety System Actuation and Contamination Event | ||
| event text = On 12/06/2007 at 1550 [CST] the C-337 unit 5 cell 3 PGLD (process gas leak detection) head in the C-337 unit 5 cell 3 housing actuated and would not clear. Response to the alarm by operators revealed a haze above the cell indicating a UF6 release inside the cell housing. While the operators were responding to the unit 5 Cell 3 alarm, two other PGLD heads actuated in C-337 unit 5 cell 5. To stop the release both cells 3 and 5 were taken below atmospheric pressure. Investigation indicated that a UF6 release had occurred. The amount of material released has not been determined. | | event text = On 12/06/2007 at 1550 [CST] the C-337 unit 5 cell 3 PGLD (process gas leak detection) head in the C-337 unit 5 cell 3 housing actuated and would not clear. Response to the alarm by operators revealed a haze above the cell indicating a UF6 release inside the cell housing. While the operators were responding to the unit 5 Cell 3 alarm, two other PGLD heads actuated in C-337 unit 5 cell 5. To stop the release both cells 3 and 5 were taken below atmospheric pressure. Investigation indicated that a UF6 release had occurred. The amount of material released has not been determined. | ||
The actuated PGLD heads are Q safety system components. At the time of the incident the cell was operating in a mode which required the system to be operational. This is being reported based on SAR 6.9 Table 1, J2 (unplanned actuation of a Q safety system) and 10 CFR 76.120 (c) (1) (i) (unplanned contamination event). | The actuated PGLD heads are Q safety system components. At the time of the incident the cell was operating in a mode which required the system to be operational. This is being reported based on SAR 6.9 Table 1, J2 (unplanned actuation of a Q safety system) and 10 CFR 76.120 (c) (1) (i) (unplanned contamination event). | ||
Revision as of 22:15, 1 March 2018
| Where | |
|---|---|
| Paducah Gaseous Diffusion Plant Paducah, Kentucky (NRC Region 2) | |
| License number: | Gdp-1 |
| Reporting | |
| 10 CFR 76.120(c)(1) Other Unspec Reqmnt | |
| Time - Person (Reporting Time:+17.87 h0.745 days <br />0.106 weeks <br />0.0245 months <br />) | |
| Opened: | Billy Wallace 15:42 Dec 7, 2007 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Dec 7, 2007 |
| 43828 - NRC Website | |