ML16256A326

Revision 309 to Final Safety Analysis Report, Chapter 7, Instrumentation and Controls, Appendix 7.7A

ML16256A326
Person / Time
Site:	Waterford
Issue date:	08/25/2016
From:	Entergy Operations
To:	Office of Nuclear Reactor Regulation
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W3F1-2016-0053
Download: ML16256A326 (3)

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WSES-FSAR-UNIT-37.7A-iAPPENDIX 7.7APLANT SAFETY PARAMETER DISPLAY SYSTEM(SPDS)

WSES-FSAR-UNIT-37.7A-1Revision 8 (5/96)APPENDIX 7.7APLANT SAFETY PARAMETER DISPLAY SYSTEM (SPDS)7.7A.1DESCRIPTIONThe Waterford 3 Safety Parameter Display System (SPDS) consists of a plant monitoring computer-drivenCRT display providing the operators with an indication of a set of parameters defining the safety status of

the plant.While the main purpose of the SPDS is to aid the operator in the detection of abnormal operatingconditions, duplication of the SPDS displays in the Technical Support Center (TSC) and the Emergency Operations Facility (EOF) enhances the exchange of information between these facilities and the control room; it also assists the management in the decision making process.The data base of the plant monitoring computer includes many of the variables required to providesignificant information to the operator on the status of every important plant function, such as:-Reactivity Control-Reactor Core Cooling and RCS Heat Removal

-RCS Integrity

-Radiation Releases

-Containment ConditionsThe use of the Plant Monitoring Computer as a data acquisition system for the SPDS offers the followingadvantages.a)Most, if not all, of the specified parameters required for the SPDS are already available in theextensive plant monitoring computer data base, as required by other monitoring activities or specific application programs.b)Additional inputs from plant instrumentation or from other monitoring systems (e.g., radiationmonitoring system) are also provided.c)Derived variables required for the display can be obtained through software informationprocessing.d)The display formats are designed according to human factors principles. A routinely displayed,readily interpretable presentation of the safety status for all modes of operation is always available to the operator. This information is obtained by grouping a limited number of paramaters, derived variables and their trends, in dedicated primary display formats. Alternate formats may be displayed at the operator's request.

WSES-FSAR-UNIT-37.7A-2Revision 8 (5/96)e)The CRTs used for the safety parameter displays in the control room, as well as theircorresponding keyboards, are similar to the CRTs integrated in the main control board.

Availability of similar displays in the Technical Support Center (TSC) and the Emergency Operations Facility (EOF) is obtained through additional CRTs and keyboard consoles linked to the Plant Monitoring Computer.