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Technical Center - TGT3 Components Qualification KarlsteinPräsentationen NRC 24.06.2003 GAP General Description

Large Valve Test Facility GAP of TGT3 in the Technical Center KarlsteinLarge Valve Test Facility GAP of TGT3 in the Technical Center Karlstein

�� Large Large ValveValve Test Test FacilityFacility GAP GAP

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�� Thermal-hydraulicsThermal-hydraulics

�� DataData recordingrecording


Large Valve Test Facility GAPLarge Valve Test Facility GAP

Large Valve Test Facility GAP of TGT3 in the Technical Center Large Valve Test Facility GAP of TGT3 in the Technical Center KarlsteinKarlstein

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� The Large Valve Test Facility GAP originally was designed as a full-scale model of part of a1300 MW-PWR secondary circuit.

� It is used for other test conditions where high mass flows of steam and hot water are required.

� 22 MW steam power station at pressure up to 165 bar at 500 °C

� 125 m3 high-pressure steam accumulator

� Like the steam generators installed in the nuclear power plant, the GAP test stand also has aflow limiter at the outlet of the accumulator

� The emergency stop valve plus a safety valve and a relief valve at the top

� 38 m-long 28"-diameter main steam line

� The test stand is designed to simulate a full-size pipe break scenario. For this it is fitted withtwo quick-opening valves with an opening time of about 0.2 seconds.

� 970 m3 pool of water in which the steam is condensed

Basic EquipmentBasic Equipment



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Steam Accumulator 130 m³

Contour of Steam Generator

Main Steam Line

Test Valve

Quick Opening Valves

Quencher

Condensation Pool

Exhaust Line

Emergency Stop Valve

2100

020

100

Steam GeneratorSteam Generator



Large Valve Test Facility GAP: Test Setup for Steam and Twophase Flow Blow-down Tests for Test Valves > 10"

Main stop valveFrom HPBenson boiler

Steamaccumu-

lator

Demineralizedwater supply

Main water line

DN

350

Main steam line

DN

700

A

Test specimen:

Quick-opening valvesfor pipe break simulation

Discharge line

Preheating line

M

Quencher

Quench pool

Design pressure accumulator 165 barDesign pressure main steam and water lines 110 barDesign temperature 360 °CAccumulator volume 125 m3

Quench pool water content 675 m3

1900 mm for 10"...18" valves2300 mm for > 20" valves

Nozzle for spring loaded safety valve testing

Typical blowdown times with maximum failure flow ~ 5 s with 10" motor operated valves ~ 30 s

DN 800

DN 800

M

M

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Test Setup for Steam and Test Setup for Steam and TwophaseTwophase Flow Blow-down Tests for Test Valves > 10” Flow Blow-down Tests for Test Valves > 10”

970 m 3

Combined valve station

28“



Additional test equipment allows to test also valves up to 8” with water of high mass flowconditions for subcooled and saturated water up to 110 bar. For that reason the bottom of theaccumulator is connected to the test bed.

Main stop valveFrom HPBenson boiler

Steamaccum-

lator

Demineralizedwater supply

Flow control valve

Main water line

DN

350

DN

700

Isolation gate valve


Quick-opening valvesfor pipe break simulationOpening time 0.2 sec

Discharge line

Preheating line

Quencher

Quench pool

M

M

M

M

DN 800

DN 800

A

Leakagemeasurement

Connection flange for angle valves(e.g. spring loaded safety valves)

Flow control calve

M


A

Test specimenDN 150 - DN 200

Test specimenDN 150 - DN 200

Main steam line

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1

1

Setup water tests

Setup steam tests

Variant

Large Valve Test Facility GAP: Test Setup for Hot Water Blow-down Tests for Test Valve DN 150 - DN 200

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Test Setup for Hot Water Blow-down Tests for Test Valves DN 150...200 (6”…10”)Test Setup for Hot Water Blow-down Tests for Test Valves DN 150...200 (6”…10”)



28“ Main 28“ Main SteamSteam Isolation Isolation GateGate ValvesValves

FeedwaterFeedwater Isolation IsolationValve DN 200Valve DN 200

Internals of Main SteamIsolation Globe Valve

of Convoy Plants

Youngwang 3 to 6Ulchin 5 &6

GKN 1 MSIV

Sizewell B

Santa Maria di Garona

Select Test ExamplesSelect Test Examplesof Isolation Valvesof Isolation Valves

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FuntionalFuntional Tests of Spring-Loaded Main Steam Safety Valves DN 150...250 (6”…10”) Tests of Spring-Loaded Main Steam Safety Valves DN 150...250 (6”…10”)

Steamaccumulator

125 m³

P1

T

F1

Demineralized waterFeedwater

Main steam

Plantsupplysystem

Quick-openingvalve

Mainsteamline

P2

G

Test specimen:spring-loadedsafety valve

Quick-openingvalves (closed)

Quencher

Condensationsystem

Pressure of accumulatorPressure of test drumMass flow rateTemperatureValve lift

P1:P2:F:T:G:

TimeTypical test of a spring-loaded safety valve

Pressure Valve lift

BlowdownP1

P2

Setpressure

Adjustableopening ramp

Adjustableclosing ramp

Reseatpressure

G: Valve liftInitiation byopening ofquick-openingvalve

15 m³

F2

QualificationQualification of MSSV of MSSV forfor SizewellSizewell B B

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Main Steam Safety Valves (MSSV) must be actuated under a positive pressure ramp, wherethe pressure increases during the opening of the safety valve. With the Large Valve TestFacility those tests are possible even for bigger safety valves up to 10”.



Fragmentation of Insulation Material by Steam and Two-phase Flow Jets during LOCAFragmentation of Insulation Material by Steam and Two-phase Flow Jets during LOCA

Simulation of the blow-down

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Fragmentation of Insulation Material by Steam and Two-phase Flow Jets during LOCAFragmentation of Insulation Material by Steam and Two-phase Flow Jets during LOCA

Insulation cassette

Destroyed cassettes

Unopened cassette after test

Nozzle and cassette support after test

Fragmented insulation Collection of the fragmented insulation

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Video of a Blow-downVideo of a Blow-down

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Data recording – Data Acquisition SystemData recording – Data Acquisition System

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� The data will be collected on a high performance PC based dataacquisition system MEGADAC. The maximum sample rate is 200000samples/s.

MEGADACOPTIM5033A

PC with Test Control SoftwareTCS

Laser Printer

CD Writer

IEEE-488 BUS

Test Data



Data recording – Plug-In ModulesData recording – Plug-In Modules

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� The MEGADAC has plug-in modules so that the requirements ofthe measurement can be met:

� 8 Channels (AD 5884 TD)directly to thermocouples4-pole Butterworth filter. The filter frequency is 40 Hz.

� 16 Channels (AD 885 SH)of sample and hold differential inputs3-pole 310 Hz Bessel filter(for differential pressure, valve lift, ± 10 V signal)

� 22 Channels (AD 682 SH1)of sample and hold differential inputs with on-board signal excitation andprogrammable gains8-pole Butterworth filter, the frequency is computer contolled up to 20 Hz – 10kHz(for pressure and force sensors with strain gauges)



Data recordingData recording

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� Quick look evaluation is released after each testing

(checked and signed)

� The test records are converted into ASCII-format and stored on acompact disk



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Questions ? ??

large valve test facility gap - nrc: home page · 2012. 11. 18. · large valve test facility gap...

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