ML20083E173

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Valve Test Logic
ML20083E173
Person / Time
Site: Nine Mile Point 
Issue date: 12/22/1983
From:
GENERAL ELECTRIC CO.
To:
Shared Package
ML17054A301 List:
References
GEK-37941, NUDOCS 8312280490
Download: ML20083E173 (8)
v • d • e


Text

GEK-37941

(

VALVE TEST LOGIC (BWR)

GENERAL partially closed. Test CV-1, CV-2, and CV-3 in sequence. Thisprocedure wil1 minimize load s ving SeeSchematic Wiring Diagram - Valve Test Logic during CV-1, 2, and 3 test.

following this publication.

The unit may see some bypass valve acth n to The purpose of valve tests is to permit regular compencate for the pressure increase.

checking of theoperationof all turbine steam valveu during normal ON-LINE OPERATION.

SINGLE ADMISSION UNITS: The following CV testing procedure is recommended for singh ad-The Schematic Wiring Diagram - Valve Test Exigic mission units.

also contains the controlling logic of all non servo-controlled (non positioning) valves.

Decrease load to approximately 70% to allow for

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increasedflowpickup inthose CV's notbeing tosted.

This will minimize load swing. Test each valve in VALVE TEST FOR CONTROL VALVES sequence.

. The control valves are tested separately. When the testbuttonof theCV-1 valve is depressed. CV-1 VALVE TEST FOR STOP VALVES will close at a moderate velocity until, at approxi-mately I/2-inch of stroke of the servomotor, the INDIVIDUAL TESTING fast-acting valve is operated to close the valve rapidly for the remaining stroke. Both the normal The stop valves aretested separately. When the operating devices and the fast-acting devices are test button on the SV-1 valve is depressed, SV-1 thereby tested, will close at a moderate velocity until, at api.roxi-mately l-inch of strokeof the servomotor, the fast-When the control valve has closed, and the op-acting valve is operated to close the valve r ipidly erator releases the test butten, the control valve for the remaining stroke. Both the normal aper-will open.

ating devices and the fast-acting devices are thereby tested.

All other associated CV's are tested in a like i

manner.

When the stopvalve has closed, and the operator releases the test button, the stop valve will open.

i NOTE: The operator should test only one All other associated SV's are tested in a like control valve at one time. When one test button is released to allow thetested valve l

to reopen, the opening movement should be observed and the next valve of the set should i

NOTE: The operator should test only one l

only be tested after the first one has again stop valve atone time. When one test bE "c5 assumed normal operating position.

ton is released to allow the tested valve to reopen, the opening movement should be 38 The CV's should be tested weekly.

observed and the next valve of the set clo co n should only be tested after the first one MULTIPLE ADMISSION UNITS: The following has again assumed normal operating po-o0 :s CV testing procedure is recommended for multiple sition.

Q admission units, to o Individual testing should be done daily.

[

Decrease load so that CV-4 is more than 90*o w o'.

closed. Test CV-4 to check the fast-acting valve h

operation. This procedure will minimize load MULTI-TESTING I

swing due to CV-4 fast closing.

Any combination of 2 stop valves can be tested Continue to decrease load so that CV-3 (3 or 4 simultaneou sly by pushing the associated test buttons admission) or CV-1, 2, 3 (2 admission) have just simultaneously. The valveswill slowly move to the

GEK-37941, VALVE TEST LOGIC I

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10% closed position and stop. When the buttons are

a. Units with selector switch and fast acting op.

r11 eased, the valves will re-open.

eration For multi-testing procedures refer to APED These units are tested individually. The op-specifications.

erator chooses the bypass valve to be tested by turning a selector switch. When the oper-ator depresses the valve test tutton, the se-VALVE TEST FOR INTERCEPT AND lected bypass valve starts opening at a mod-INTERMEDIATE STOP VALVE erate velocity. When the bypass valve is 90%

open a fast-acting solenoid valve is operated The intercept valve and its associated inter-to open the valverapidlyduring the remaining mediate stop valve are tested together. When the stroke. When the valve is fully open, the op-t2st button of the IV-1/ISV-1 valve combination is erator releases the test button and the valve depressed, IV-1 will close at a moderate velocity, will close.

until, at approximately 1-inch of stroke of the servo-motor, the fast-acting valve is operated to A light willindicate when the next valve can close the valve rapidly for the remaining stroke, be selected.

Both the normal operating devices and the fast-acting devices are thereby tested.

The selector switch is used on units having more than four (4) bypass valves.

When the intercept valve has closed, the assoc; ated intermediate step valve starts closing. Again, The bypass valve test amplifier is a ramp as mentioned above, both the normal operating de-generator, which opens and closes the bypass vices and the fast-acting devices are thereby tested.

valve at a moderate velocity during test.

When both valves are closed and the operator re-leases the test button, the intermediate stop valve

b. Units with Selector Switch.

will open first and afterwards the mtercept valve Will open.

Same as(a) but without fast opening operation.

NOTE: The operator should test only one

c. Units with Push Buttons and Fast Openina i

intercept / intermediate stop valve combi-Operadon nation at one time. When one test button is released to allow the tested valve (s) t These valves are tested individually by de-reopen, the opening movement should be pressing the appropriate push button. When observed and the next valve of the set the operator depresses the valve test button, should only be tested after the first one the selected bypass valve starts opening at a has again assumed normal operation.

moderate velocity. When the bypass valve is 90% open, a fast-acting solenoid valve is op-Combined valves should be tested daily.

erated to open the valve rapidly during the remaining stroke. When the valve is fully The combined valves test circuits also contain open, the operator releases the test button the necessary logic to control the slave intercept and the valve will close.

valves. The slave intercept valve is controlled by means of limit switches, which are mounted on the A light will indicate when the next valve can master intercept valve, and associated relay logic.

be selected.

Push buttons are used on units having up to VALVE TEST FOR BYPASS VALVES four (4) bypass valves.

See Schematic li' iring Diagram - By/> ass Valve The bypass valve ' test amplifier is a ramp Test logic included in this Tab. For bypass valve generator, which opens and closes the bypass testing procedures refer to APED specifications.

valve at a moderate velocity during test.

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l OVERSPEED TRI O

1 2

COIL PUSH CONTACT MASTER DEVICE OR RESET NORMAL FUNCTION DESIGNATION LIGHT TRIPPED (3 TO 5 SEC) OPERATION "LO LOCKOUT VALVE INDICATING SWITCH LVIS NO O

O O

LOCKOUT VALVE SOLENOID LVS COIL DE DE DE D

MECil TRIP INTERI.OCK SWITCH MTIS NC O

X X

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X-O O

OIL TRIP VALVE SOLENOID OTVS COIL DE DE DE OIL RESET SWITCH ORS NO O

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RESET SOLENOID OIL VALVE RSOV COIL DE DE-EN-DE DE

" NORMAL" PUSH BUTTON CP-270 NC X

X X

" NORMAL" LIGHT CP-270 LIGHT ON ON ON Ob

" LOCKOUT" PUSH BUTTON CP-271 NO O

O O

" LOCKOUT' 11GHT CP-271 LIGHT OFF OFF OFF OJ

" OIL TRIP" PUSil BUTTON CP-i?2 NO O

O O

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X X

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" RESETTING" LIGHT CP-311 LIGHT OFF OFF-ON-OFF OFF

" RESET" PUSH BUTTON CP-273 NO O

O-X-0 O

MASTER RESET

" RESET" LIGHT CP-312 LIGHT OFF BACKUP OVERSPEED TRIP RELAY VC5840 COIL DE DE DE VC5840 NC X

X X

LOCKOUT SEAL IN RELAY KT412 COIL EN EN-DE DE (10 SEC TDDO)

KT412 NO X

X(10 SEC)-O O

LOCKOUT DROPOUT RELAY KT421 COIL DE DE-EN-DE DE (12 SEC TDDO)

KT421 NC X

X-O(12 SEC)-X X

OIL TRIP SOLENOID VALVE RELAY XKT410-1 COIL DE DE DE XKT410-1 NO O

O O

LOCKOUT INDICATING LIGHT RELAY KT404 COIL DE DE DE D

KT404 NO O

O O

I MECH TRIP SWITCH RELAY KT420 COIL EN EN-DE DE (PREVENTS UNLOCKING WHILE TRIPPED)

KT420 NC O

O-X X

KT420 NO X

X-O O

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O-X-O O

LOCKOUT RELEASE PRIMARY RELAY KT414 COIL DE DE-EN-DE DE KT414 NO O

O-X-O O

NORMAL LIGHT RELAY KT413 COIL DE DE DE D

KT413 NC X

X X

HESET SOLENOID DIL VALVE RELAY XKT418-1 COIL DE DE-EN-DE DE XKT418-1 NO O

O-X-O O

OVERSPEED ALARM KT407 COIL DE DE DE D

CANCELLING RELAY KT407 NC X

X X

LOCKOUT RELAY KT403-1 COIL DE DE DE KT403-1 NO O

O O

LOCKOUT SEAL IN RELAY KT413 COIL DE DE DE D

(IF B. U.O.T. IS NOT ON)

KT413 NO O

O O

SWITCH OR RELAY CONTACT: O = OPEN, X = CLOSED RELAY COIL: DE = DE-ENERGIZED, EN = ENERGIZED DOT: * = NO CHANGE FROM PREVIOUS COLUMN NO = NORMALLY OPEN, NC = NORMALLY CLOSED 7-73(1M)

GENERA

GEK-17909A ALE 1 IING AND RESET SYSTEM 4

5 6

7 4a 4b 4e TRIP TEST 12 SEC DISCONTINT!ED PUSH " OIL TRIP' PUSH 10 SEC AFTER RESET BEFORE OIL UNSUCCESSFUL OVERSPEED

" OIL TRIP" PUSH AFTER RESET BUTTON IS TRIP:

TEST WHILE

  • SUCCESSFUL TEST

" RESET" HAS OCCURRED RELEASED PUSH " NORMAL" (SEE TEXT)

LOCKED OUT X-O e

X-O X

X-O EN-DE EN-DE EN EN-DE o

e o

e X

X X-O O-X X-O e

O FOl-O-X DE-EN-DE e

DE DE-EN-DE DE O-X-O e

O O

O DE-EN-DE e

DE DE DE IX-O-Xl X

X e

OFF-ON e

OFF-QN OFF OFF-ON e

o e

O O

O e

ON-OFF ON-OFF ON ON-OFF 10-x-ol e

e O

[ O-X-O J O

x-O-x e

e X

X-O-X X

OFF-ON ON-OFF e

e OFF OFF OFF-ON e

OFF-ON-OFF e

e OFF OFF OFF e

IO-X-OI O

O O

ON-OFF OFF-ON e

ON ON ON-OFF e

e e

e DE DE

[_DE ENI e

e o

X X

X-O DE-EN - e EN-DE DE DE-EN-DE EE-EN O

O-X(10 SEC)-O O-X 0-X-e X(10 SEC)

IX-OI e

DE-EN-DE o

DE DE DE e

X-O-*

O IO-Xl X

X X

DE-EN-DE DE DE-EN-DE DE O-X-O e

e O

O-X-O O

e o

EN-DE e

EN-DE EN EN-DE X-O e

X-O X

X-O DE-EN EN-DE DE DE DE-EN X-0 O-X e

o X

X X-O O-X X-O e

e O

O O-X DE-EN-DE DE DE DE e

O-X-O e

O O

O e

DE-EN-DE e

DE DE DE O-X-O O

O O

e EN-DE EN-DE EN EN*DE O-X O-X O

O-X e

DE-EN-DE DE DE DE e

O-X-O e

O O

O e

EN-DE EN-DE EN EN-DE O-X O

O-X e

O-X EN-DE EN-DE EN EN-DE e

X-0 X-O X

X-O e

e e

EN-DE EN-DE EN EN-DE X-O X-O X

X-O e

OVERSPEED TRIP TESTING AND RESET SYSTEM TABLEI 99 anMost

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