ML20098B554
| ML20098B554 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 06/29/1983 |
| From: | Hosler J ELECTRIC POWER RESEARCH INSTITUTE |
| To: | |
| Shared Package | |
| ML20093C471 | List: |
| References | |
| NUDOCS 8409260152 | |
| Download: ML20098B554 (27) | |
Text
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H2 COMEUSTION TESTING IN A 1/20TH j
SCALE MODEL OF A BWR MARK 111. CONTAINMENT j
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3Y JOHN HOSLER r
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
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H2 COMBUSTION TESTING IN A 1/20TH SCALE MODEL A BWR MARK Ill CONTAINMENT
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'3 e OBJECTIVE / SCOPE t
j e SCALING LAWS APPJ. LED
[
o TEST FACILITY DESCRIPTION-1 e TEST RESULTS e
SUMMARY
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H COM3USTION TESTING IN A 1/20TH.
2 SCALE MODEL OF A MARK III CONTAINMENT
=-
o CONTRACTOR ACUREX CORPORATION o
OBJECTIVES
- PROVIDE A VISUAL RECORD OF GLOBAL H2 COMBUSTION SEHAVIOR IN A FULL 3600 MODEL OF A MK Ill CONTAINMENT 4
PROVIDE DATA TO ESTIMATE THERMAL ENVIR.ONMENT (TEMPERATURES, RADIANT HEAT FLUX) DUE TO H2 COMBUSTIO*! AS A CONTIN 0US FLAME e
SCOPE 41 TESTS PERFORMED INCLUDING TESTS TO ASSSESS THE EFFECTS OF VARIATIONS IN:
TOTAL H2 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
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a SCALING LAWS APPLIED FROUDE'MODELLING j_'
APPLICABLE TO TURBULENT BUOYANTLY CONTROLLED i,.
DIFFUSION FLAMES i
I RESULTING SCALING RELATIONS LENGTH (S)I H
RELEASE RATE (S)5/2 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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PLAN VIEW OF 1/20Ta SCALE VISUAll2ATION FACILITY i
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Test H2 Flow Pool Gas Pool H2 (Full Scale)
Temp Temp Water.,
Release Insul.
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!!-1 1.0 185 140 j,Pa*
4 ADS + 312'
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No. !! 20 Data Recorded.
- - + -
i 1/20tl. Scale Phase !!! Test Matrix I
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Total
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Top Tamp Water Release Flux Insul.
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- 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 H
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" 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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.. I EFFECTS OF VARIATIONS IN PARAMETERS ON PEAK GAS TEMP (TG) JUST BELOW HCU FLOOR i
i e TOTAL H FLOWRATE(d) 2 INCREASING d FROM 0.8 LBM/SEC - 1.0 LBM/SEC INCREASED T$ 200 F G
INCREASING d FROM 0.8 LBM/SEC'- 2.0 GM/SEC INCREASED T 5450 F C
a e NUM3ER OF ACTIVE SPARGERS
~'
- DELETION OF ADJACENT SPARGER (9.TO 8 SPARGERS)
FLOWRAT!)(EFFECTMOREPRON00NCEDAT JECREASES T H2 T
G DECREASED s 100 F FOR 0.8 LBM/SEC TESTS
-T DECREASED s 350 F FOR 2.0 LBM/SEC TESTS G
RELEASE OF ALL H THROUGHASINGLESPARGERINCRNASED 2
0 T s400 F (RELATIVE TO 9 TOTAL (2 ADJACENT) CASE) 3 s
o O
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i EFFECTS OF VARIATIONS IN PARAMETERS i
ON PEAK GAS TEMPERATURE JUST BELOW HCU FLOOR (CONT'D) l a=
- e.50-50 SPLIT BETWEEN LOCA VENTS AND SPARGER FLOW
- DECREASED T $100 F IN HOTTEST CHIMNEY G
-T IN OTHER CHIMNEYS MAY INCREASE SLIGHTLY I
G e
POOL WATER LEVEL LOWERING POOL WATER LEVEL FROM. UPPER POOL DUMP LEVEL TO NWL:
- HAD NO EFFECT IN REfl0T4 DIRECTLY ABOVE SPARGER LOWERED T
- 50 NEAR CENTER OF HCU FLOOR g
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)
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EFFECTS OF VARIATIONS IN PARAMETERS ON PEAK GAS TEMPERATURE JUST BELOW HCU FLOOR (CONT'D) j i
.e
.e INSULATING.EYREX OUTER SHELL OF FACILITY
(
- NO RESOLVABLE EFFECT
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REMOVAL OF SOLID FLOOR IN WETWELL ANNULUS AT. 40 AZIMUTH i
T (m) LIKELY UNAFFECTED (FLAMES SHIFTED AWAY G
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
{
41 TESTS PERFORMED IN A 1/20T,x SCALE MODEL OF A MARK III
(
e CONTAINMENT OBJECTIVES:
OVERALL H2 C0fGUSTION PHENOMENA UNDERSTANDING i
COMBUSTION VISUALIZATION l
- ASSESSMENT OF THERMAL ENVIRONMENT IN WETWELL RESULTING FROM DIFFUSION FLAMES e
- SCOPE
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- ASSESS EFFECTS OF VARIATIONS IN
.{
i H2 FLOW RATE NO, OF ACTIVE SPARGERS
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- VENT VS, SPARGER FLOW POOL WATER LEVEL j
POOL TEMPERATURE HEAT LOSS FROM OUTER SHELL CONTAIN1ENT 2
1 FLOW BLOCKAGE IN WETWELL ANNULUS
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FROUDE SCALING LAWS APFLIED
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SUMMARY
(CONT'D) t i
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e RESULTS g
t.
- PHENOMENA CHARACTERIZED BY STEADY FLAMES BASED AT POOL RATES ABOVE 0.4 LBM/SEC FULL SCALE i
SURFACE FOR H2
- FLeiES LIFT TO HCU FLOOR LEVEL LATE IN BURN 2
(02 <s 6%)
FOR BASE CASE (6 = 0,8 LBM/SEC, 8 ADS +
e 312 SPRAGER, 185 POOL) e PEAK GAS TEMF JUST i!ELOW HCU FLOOR GENERALLY RANGED FROM 560 TO 700 F (ONE TEST I
SHOWED TEMP AS HIGH 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.
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J. Best.sa l
6/83 J
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