The licensee provided the following information:
During operator rounds it was discovered that a double door for the control tower habitability envelope was propped open [from painting earlier in the day]. This condition would have resulted in not meeting the design basis requirements of maintaining a positive pressure inside the control tower envelope following a design basis accident. The doors were immediately closed.
An issue report was generated and a prompt investigation was commenced in accordance with station policies.
The NRC resident Inspector was notified.
- RETRACTION FROM A. MILLER TO J. KNOKE AT 13:15 EST ON 03/30/05 ***
The licensee provided the following information:
An ENS notification (EN# 41444) was made at approximately 00:59 on 2/20/2005 regarding a potentially unanalyzed condition associated with a double door for the Control Tower Habitability Envelope, which was propped open. It was initially thought that this condition could have resulted in not meeting the design basis requirements for the Control Tower Envelope. However, an analysis of an air flow measurement across the open door has shown that the unfiltered air in-leakage into the Control Tower Habitability Envelop would not exceed the value assumed in the design basis accident analysis for Control Room Habitability. Since this event did not result in an unanalyzed condition, this event is being retracted.
The licensee notified NRC Resident Inspector.
