ENS Event | |
|---|---|
23:00 Dec 7, 2016 | |
| Title | Unisolable Reactor Coolant System Boundary Leakage |
| Event Description | While TMI [Three Mile Island] Unit 1 was in a hot shutdown condition, leakage was identified coming from an RCS [reactor coolant system] pressure boundary on a welded connection on the 'A' Reactor Coolant Pump. The leakage is unisolable from the RCS and is less than 0.5 gpm. Planned actions are to cooldown Unit 1 to cold shutdown conditions in order to repair the leakage.
The licensee will be notifying the Pennsylvania Emergency Management Agency and has notified the NRC Resident Inspector. |
| Where | |
|---|---|
Crane  Pennsylvania (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |
| Time - Person (Reporting Time:+0.65 h0.0271 days <br />0.00387 weeks <br />8.9037e-4 months <br />) | |
| Opened: | Eric Maschuck 23:39 Dec 7, 2016 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Dec 7, 2016 |
| 52415 - NRC Website
Loading map... | |
Unit 1 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Hot Standby (0 %) |
| After | Hot Standby (0 %) |
WEEKMONTHYEARENS 529472017-09-05T15:11:0005 September 2017 15:11:00
[Table view]10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded, 10 CFR 50.72(b)(3)(v)(C), Loss of Safety Function - Release of Radioactive Material Primary Containment Declared Inoperable Due to Both Airlock Doors Open Simultaneously ENS 524152016-12-07T23:00:0007 December 2016 23:00:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Unisolable Reactor Coolant System Boundary Leakage ENS 495122013-11-07T11:00:0007 November 2013 11:00:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Reactor Coolant System Cold Leg Drain Line Ultrasonic Indication ENS 402962003-11-04T19:30:0004 November 2003 19:30:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Pressurizer Heater Bundle Diaphragm Plate Degraded Condition 2017-09-05T15:11:00 | |