ENS 50129: Difference between revisions
Jump to navigation
Jump to search
StriderTol (talk | contribs) (Created page by program invented by Mark Hawes) |
StriderTol (talk | contribs) (Created page by program invented by StriderTol) |
||
| Line 16: | Line 16: | ||
| event date = 05/21/2014 17:21 CDT | | event date = 05/21/2014 17:21 CDT | ||
| last update date = 05/22/2014 | | last update date = 05/22/2014 | ||
| title = Standby Liquid Control Inoperable Due | | title = Standby Liquid Control Inoperable Due to Tank Inleakage | ||
| event text = On 5/21/2014 at 1721 CDT, BFN [Browns Ferry Nuclear] U2 declared both trains of standby liquid control (SLC) inoperable due to suspected in-leakage to the U2 SLC tank. Control Room Operators received an alarm for high tank level and corresponding high level on the control room indicator. Personnel were dispatched to check the tank level locally and reported that tank level was high and rising. Based on this report, the SLC tank isolation valve common to both pumps was closed to prevent potentially overflowing the tank. It was subsequently determined that the sensing line had become clogged causing erroneous level indication and the local report of level was incorrect. Sensing lines for the tank level instrumentation were subsequently cleared, indicated tank level then returned to normal, and local check verified that tank level was normal. Operability was restored with tank level being verified normal and isolation valve returned to the open position. | | event text = On 5/21/2014 at 1721 CDT, BFN [Browns Ferry Nuclear] U2 declared both trains of standby liquid control (SLC) inoperable due to suspected in-leakage to the U2 SLC tank. Control Room Operators received an alarm for high tank level and corresponding high level on the control room indicator. Personnel were dispatched to check the tank level locally and reported that tank level was high and rising. Based on this report, the SLC tank isolation valve common to both pumps was closed to prevent potentially overflowing the tank. It was subsequently determined that the sensing line had become clogged causing erroneous level indication and the local report of level was incorrect. Sensing lines for the tank level instrumentation were subsequently cleared, indicated tank level then returned to normal, and local check verified that tank level was normal. Operability was restored with tank level being verified normal and isolation valve returned to the open position. | ||
This condition is being reported pursuant to 10 CFR 50.72(b)(3)(v)(C) and 10 CFR 50.72(b)(3)(v)(D). This is also reportable as a 60-day written report in accordance with 10 CFR 50.73(a)(2)(v)(C) and 10 CFR 50.73(a)(2)(v)(D). | This condition is being reported pursuant to 10 CFR 50.72(b)(3)(v)(C) and 10 CFR 50.72(b)(3)(v)(D). This is also reportable as a 60-day written report in accordance with 10 CFR 50.73(a)(2)(v)(C) and 10 CFR 50.73(a)(2)(v)(D). | ||
Latest revision as of 20:50, 1 March 2018
| Where | |
|---|---|
Browns Ferry  Alabama (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| Time - Person (Reporting Time:+3.68 h0.153 days <br />0.0219 weeks <br />0.00504 months <br />) | |
| Opened: | Eric Steele 02:02 May 22, 2014 |
| NRC Officer: | Jeff Rotton |
| Last Updated: | May 22, 2014 |
| 50129 - NRC Website
| |
Browns Ferry with 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material | |