ML20098B554

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Slide Presentation Entitled, H2 Combustion Testing in 1/20th Scale Model of BWR Mark III Containment
ML20098B554
Person / Time
Site: River Bend Entergy icon.png
Issue date: 06/29/1983
From: Hosler J
ELECTRIC POWER RESEARCH INSTITUTE
To:
Shared Package
ML20093C471 List:
References
NUDOCS 8409260152
Download: ML20098B554 (27)
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Text

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H 2 COMEUSTION TESTING IN A 1/20TH j , , SCALE MODEL OF A BWR MARK 111. CONTAINMENT j

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r JOHN HOSLER NUCLEAR SAFETY ANALYSIS CENTER NUCLEAR POWER DIVISION ELECTRIC POWER RESEARCH INSTITUTE l

PRESENTATION TO U.S. NUCLEAR REGULATORY COMNISSION BETHESDA, MARYLAND '

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29 JUNE 1983 s '

8409260152 840910 PDR ADOCK 05000458 G PDR . . . _. . . _ .

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H2 COMBUSTION TESTING IN A 1/20TH SCALE MODEL

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A BWR MARK Ill CONTAINMENT a- '

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'3 e OBJECTIVE / SCOPE  :

t j e SCALING LAWS APPJ. LED -

[ o TEST FACILITY DESCRIPTION- 1

! e TEST RESULTS _

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SUMMARY

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, H2COM3USTION TESTING IN A 1/20TH . .

SCALE MODEL OF A MARK III CONTAINMENT

=-

o CONTRACTOR -

ACUREX CORPORATION

, , o OBJECTIVES

- PROVIDE A VISUAL RECORD OF .

GLOBAL H 2 COMBUSTION SEHAVIOR

- IN A FULL 3600 MODEL OF A MK 4

Ill CONTAINMENT PROVIDE DATA TO ESTIMATE THERMAL ENVIR.ONMENT (TEMPERATURES, RADIANT HEAT FLUX) DUE TO H 2 COMBUSTIO*! AS A CONTIN 0US FLAME .

e SCOPE -

41 TESTS PERFORMED INCLUDING TESTS TO ASSSESS THE EFFECTS OF VARIATIONS IN:

TOTAL H 2 RELEASE PaiE BLOCKAGES /IN WETWELL ANNULUS SPARGER VS, VENT RELEASE NUMBER / LOCATION OF ACTIVE SPARGERS POOL TEMP HEAT LOSS FROM OUTER CONT,

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SHELL e STATUS -

TESTING COMPLETED 6/23/83 TEST RE? ORT BY 10/1/83 l JH 6/83 l, , , _ , , . _. .. - - - --

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a SCALING LAWS APPLIED

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APPLICABLE TO TURBULENT BUOYANTLY CONTROLLED i, .

DIFFUSION FLAMES i I

RESULTING SCALING RELATIONS  : ,

LENGTH (S)I

.. H 2 RELEASE RATE (S)5/2 ,

is TIME (S)l/2 _

VELOCITY (S)1/2 .

' TEM?EP,ATURE (S)*

-f CONCENTRATION (S)*

'riHERE S = 1/20 FOR A 1/20TH SCALE MODEL 4

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I J. HOST.EP 6/83

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!. SCALE VISUAll2ATION FACILITY i = .

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Total  ;

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, (Full Scale) Temp Temp Water., Release Insul. 40' Floor c

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!!-9 1.0 185 140 -

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!!.13 1.0 125 90 1

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!! 21 0.8 125 90 g

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!! 23 0.4 y, p.

!!.24 0.6 185 140  ;;, r,  ;; y, Upper Pool Dep Water Level e UPD l No. !! 20 Data Recorded.

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' 1/20tl. Scale Phase !!! Test Matrix I i

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.(Tullscale 7pp Temp Water Release Flux Insul. 40 Floor /

IW/sec F oF igvjl, locations Meas. 1

!!!-1 0.8 .le's 140 pf 8 ADS + 312' Total ,No 'J n, j  !!!.2 2.0 o i

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!!!-5 0.8 8 A05 u--

!!!-6 2.0 "

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!!!-12 0.8 Nwt 8 A05 Total

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(FullScale) Top Tamp Water Release Flux Insul. 40' Floor l .

.1bm/sec #F #F M Locations h .

  • 8 i IV 1 0,.,8_ J,85 140 UPO 8 ACS + 312 Total No In IV-2 IV-3 .o.

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UPD - Upper Pool cump Water Level. .

  • NWL - Normal Operation Water Level. -

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SUMMARY

OF RESULTS

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. e STEADY DIFFUSION FLAMES ESTABLISHED ABOVE POOL FOR TOTAL H2 i, h

" INJECTION RATES GREATEf THAN 0.4 LBM/SEC (FULL SCALE)

E BURNING CHAistTERIZED BY THE FOLLOWING SEQUENCE H2 INJECTION BEGINS (ADS + 3120 (SORV) SPARGERS) l . (

WEAK UPWARD FLAME PROPAGATION FROM LOWEST IGNITERS

,, ALMOST IMMEDIATELY A FAST DOWNWARD PROPAGAT!0tl TO POOL (MINIMAL PRESSURIZATION <.1 PSIG)

( . -

IMMEDIATE ESTABLISHMENT OF STEADY .',MES ANCHORED AB0VE SPARGERS (PRIMARY BURNING)

STRONG HORIZONTAL AIR FLOWS ABGVE POOL ESTABLISHED QUICKLY

- DIRECTION OF LOWS DEPENDENT ON ANNULAR

FLOW BLOCKAGE i

0 BURNING MOST INTENSE IN 312 CHIMNEY (GRAfiD GULF CONFIG )

l -

AS 02 IS DEPLETED FLAMES WEAKEN, GROW TALLER AND (

j EVEti UALLY MOVE UPWARD AND ANCHOR ON HCU FLOOR 0

GRATING (312 CHIMNEY ONLY) (SECONDARY BURNING)

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ALLBURNINGTEPdlNATES l l JH 6/83 l -i i

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l TeTAL k EGire.:C /2ATC br-/wc (G. C. )

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..I . .

. EFFECTS OF VARIATIONS IN PARAMETERS ON PEAK GAS TEMP (TG) JUST BELOW HCU FLOOR i

i e TOTAL H 2 FLOWRATE(d) ,

INCREASING d FROM 0.8 LBM/SEC - 1.0 LBM/SEC INCREASED T$G 200 F INCREASING d FROM 0.8 LBM/SEC'- 2.0 GM/SEC INCREASED TC5450 F -

a

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e NUM3ER OF ACTIVE SPARGERS

- DELETION OF ADJACENT SPARGER (9.TO 8 SPARGERS)

JECREASES T H

2 FLOWRAT!)(EFFECTMOREPRON00NCEDAT

,- T G DECREASED s 100 F FOR 0.8 LBM/SEC TESTS

-T G DECREASED s 350 F FOR 2.0 LBM/SEC TESTS RELEASE OF ALL H 2 THROUGHASINGLESPARGERINCRNASED 0

T3s400 F (RELATIVE TO 9 TOTAL (2 ADJACENT) CASE) >

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EFFECTS OF VARIATIONS IN PARAMETERS i

. ON PEAK GAS TEMPERATURE JUST BELOW ..

HCU FLOOR (CONT'D) a= l

- e .50-50 SPLIT BETWEEN LOCA VENTS AND SPARGER FLOW

- DECREASED TG$100 F IN HOTTEST CHIMNEY

-T G IN OTHER CHIMNEYS MAY INCREASE SLIGHTLY I

e POOL WATER LEVEL LOWERING POOL WATER LEVEL FROM. UPPER POOL DUMP LEVEL TO NWL:

- HAD NO EFFECT IN REfl0T4 DIRECTLY ABOVE SPARGER LOWERED gT

  • 50 NEAR CENTER OF HCU FLOOR i

I J. HostEn 6/83

) .--

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i. ,

EFFECTS OF VARIATIONS IN PARAMETERS

! ON PEAK GAS TEMPERATURE JUST BELOW HCU FLOOR (CONT'D) i .e j

.e INSULATING.EYREX OUTER SHELL OF FACILITY (

- NO RESOLVABLE EFFECT

~

0 e REMOVAL OF SOLID FLOOR IN WETWELL ANNULUS AT. 40 AZIMUTH i TG(m) LIKELY UNAFFECTED (FLAMES SHIFTED AWAY

. FROM INSTRUMENTATION)

- OVERALL GAS CIRCULATION PATTERNS MODIFIED (FLAMES LEAN RIGHT RATHER THAN LEFT7 SOME "UP" CHIMNEY'S BECAUSE "DOWN" CHIMNEY AND VICE-A-VERSA).

i f

J. HOST.ER 6/83 1

i j,

SUMMARY

{

< e 41 TESTS PERFORMED IN A 1/20T,x SCALE MODEL OF A MARK III (

CONTAINMENT OBJECTIVES:

- i OVERALL H2 C0fGUSTION PHENOMENA UNDERSTANDING COMBUSTION VISUALIZATION l

- ASSESSMENT OF THERMAL ENVIRONMENT IN WETWELL e RESULTING FROM DIFFUSION FLAMES

~~

~

- SCOPE

- ASSESS EFFECTS OF VARIATIONS IN

.{

i H2 FLOW RATE

- NO, OF ACTIVE SPARGERS

.i . - VENT VS, SPARGER FLOW POOL WATER LEVEL j -

POOL TEMPERATURE 2

HEAT LOSS FROM OUTER SHELL CONTAIN1ENT

~

1 -

FLOW BLOCKAGE IN WETWELL ANNULUS li

.j e FROUDE SCALING LAWS APFLIED

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SUMMARY

(CONT'D)

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g e RESULTS  ;

t.

- PHENOMENA CHARACTERIZED BY STEADY FLAMES BASED AT POOL i SURFACE FOR H2 RATES ABOVE 0.4 LBM/SEC FULL SCALE

- FLeiES LIFT TO HCU FLOOR LEVEL LATE IN BURN'

' 2 (02 <s 6%)

e FOR BASE CASE (6 = 0,8 LBM/SEC, 8 ADS +

312 SPRAGER, 185 POOL) e PEAK GAS TEMF JUST i!ELOW HCU FLOOR GENERALLY RANGED FROM 560 TO 700 F (ONE TEST SHOWED TEMP ASIHIGH AS 836 F) e OBSERVED HEAT FLUX TO HCU FLOOR FROM .

BELOW:

2 TOTAL s 4K btu /HR FT 2

CONVECTIVE s 3.2K btu /Ha FT e THERMAL. ENVIRONMENT INFLUENCED MOST BY RELEASE RATE AND NUMBER OF RELBSE H2 LOCATIONS.

}

" J. Best.sa l 6/83 J

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