ML18230B479

Functional Diagrams Feedwater Control & Isolation - Sheet 13

ML18230B479
Person / Time
Site:	Harris
Issue date:	01/14/1980
From:	Ebasco Services, Westinghouse Electric Corp
To:	Office of Nuclear Reactor Regulation
References
108D831
Download: ML18230B479 (1)

Text

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PE'OCTRAMMED

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NOTES:

I.

ANALOG. GATE CONSISTS OF 2

SOLENOID VENT VALVES IN SERIES TO REDUNDANTLY INTERLOCK THE AIR LINE BETWEEN EACH VALVE DIAPHRAGM AND ITS ASSOCIATED PQSITIONER.

THE SOLENOID VALVES ARE DE-ENERGIZE TO VENT, CAUSING7 THE MAIN FEEDWATER VALVE TQ CLOSE IN 5 SECONDS.

2.

ALL CIRCUITS ON THIS SHEET ARE NQT REDUNDANT, EXCEPT WHERE INDICATED "REDUNDANT".

3.

OPEN/SHUT INDICATION FOR EACH FEEDWATER VA~VI= IN4 CONTROL ROOM.

4.

THE REDUNDANT MANUAL RESET CONSISTS OF TWQ MOMENTARY CONTROLS ON THE CONTROL BOARD, ONE FOR EACH TRAIN.

5.

TRIPPING OF FEEDWATER PUMPS CAUSES CLOSURE OF ASSOCIATED PUMP DISCHARGE VALVES.

6.

THE FEEDWATER PUMPS AND PUMP DISCHARGE VALVES ARE SUPPLIED BY 'OTHERS.

PECSTE

>I 7.

THE STEAM GENERATOR LEVEL SIGNAL 'ORIGIN MUST BE DIFFERENT FROM THAT WHICH IS USED ON SHEET 7

FOR THE LOW FEEDWATER FLOW REACTOR TRIP.

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