ML21278A200

2 to Updated Final Safety Analysis Report, Chapter 7, Section 7.7, Control Room Annunciation

ML21278A200
Person / Time
Site:	Calvert Cliffs
Issue date:	09/07/2021
From:	Exelon Generation Co
To:	Office of Nuclear Reactor Regulation
Shared Package
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References
NEI 99-04
Download: ML21278A200 (1)

Text

7.7 CONTROL ROOM ANNUNCIATION Visual and audible alarm units are incorporated into the control boards to warn the operator if limiting conditions are approached or off-normal conditions exist for any system. These visual and audible units are supplied in two stages: (1) annunciator enclosures supplied as part of the original installation; and (2) status alarm panels.

Status alarm panels are supplied in the same area as the existing annunciator panels to provide for additional alarm points. The panels furnish annunciation for one or more systems. A "summary alarm" window is included in the existing annunciator for each one of the systems contained in the status panels. The "summary alarm" has "reflash" capability to warn of additional incoming alarms on the status panel and does not clear until all status alarms are cleared. These status panels are mounted on the associated system panel or immediately adjacent to it.

A list of all annunciator windows, legends, and alarm initiating devices is maintained in controlled BGE drawings.

CALVERT CLIFFS UFSAR 7.7-1 Rev. 47