05:00 Jan 1, 2019
Gland Seal Exhauster - Automatic Trip Function Inoperable
On January 1, 2019 at approximately 0454 EST, while performing planned maintenance activities on the Feedwater Distributed Control System (FW DCS), it was discovered that the automatic trip instrumentation of the Gland Seal Exhauster (GSE) was inoperable. The automatic GSE trip is assumed in the safety analysis for the Control Rod Drop Accident (CRDA) and is required when Thermal Power is less than or equal to 10%.
The automatic trip function of the GSE was inoperable for 1 minute, 19 seconds. No Control Rod movement occurred while the automatic trip of the GSE was inoperable. There was no adverse impact to public health and safety or to plant employees and there was no radiological release.
Michigan (NRC Region 3)
|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:+6.03 h0.251 days <br />0.0359 weeks <br />0.00826 months <br />)|
11:02 Jan 1, 2019
|NRC Officer:||Joanna Bridge|
|Last Updated:||Jan 1, 2019|
|53811 - NRC Website|