ENS 49783
ENS Event | |
|---|---|
15:00 Feb 1, 2014 | |
| Title | Control Room Door Blocked Open for Planned Maintenance |
| Event Description | Door in Control Room boundary blocked open for scheduled maintenance. No impact as door is opened under administrative control OP3314F, Section 4.24. Door has been closed following maintenance.
Door opened under administrative control could have prevented the fulfillment of Safety Function to Mitigate the Consequences of an Accident. A door credited for Control Room Boundary was blocked open under administrative controls as part of a Pre-Planned maintenance activity. Technical Specification 3.7.7, Control Room Emergency Ventilation System, is applicable and allows 'The Control Room Envelope (RE) boundary may be opened under administrative control' NUREG 1022, Revision 3, states inoperability of a single train system is reportable even though the plant's Technical Specifications may allow the condition to exist for a limited time. Although the plant was operated within the licensing basis, since the Control Room Envelope was rendered inoperable, Dominion is reporting that this condition could have prevented the fulfillment of the safety function to mitigate the consequences of an accident. The licensee has notified the NRC Resident Inspector, State government, and Local government.
The licensee is retracting this report based on the following: The purpose of this call is to retract the report made on February 1, 2014, NRC Event Number 49783. Event Report number 49783 describes a condition in which the Millstone Power Station Unit 3 (MPS3) Control Room Envelope was voluntarily rendered inoperable under administrative control. Using the criteria of NUREG-1022 Rev. 3, this condition report is not related to inoperability being due to one or more personnel errors, including procedure violations; equipment failures; inadequate maintenance; or design, analysis, fabrication, equipment qualification, construction, or procedural deficiencies and was declared inoperable as part of a planned evolution for maintenance or surveillance testing and done in accordance with an approved procedure and the plant's technical specifications. Therefore, this condition Is not reportable and NRC Event Number 49783 is being retracted. The basis for this conclusion will be provided to the NRC Resident Inspector. The licensee notified the NRC Resident Inspector. Notified R1DO (Ferdas). |
| Where | |
|---|---|
Millstone  Connecticut (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| Time - Person (Reporting Time:+-0.8 h-0.0333 days <br />-0.00476 weeks <br />-0.0011 months <br />) | |
| Opened: | Edwin Michael Socha 14:12 Feb 1, 2014 |
| NRC Officer: | Daniel Mills |
| Last Updated: | Mar 13, 2014 |
| 49783 - NRC Website | |
Unit 3 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |