ML20098B571
| ML20098B571 | |
| Person / Time | |
|---|---|
| Site: | River Bend  |
| Issue date: | 06/29/1983 |
| From: | Corlell R WASHINGTON, UNIV. OF, SEATTLE, WA |
| To: | |
| Shared Package | |
| ML20093C471 | List: |
| References | |
| NUDOCS 8409260159 | |
| Download: ML20098B571 (9) | |
Text
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ij I ASSESSMENT OF SCALING ;
4 ADEQUACY FOR 1/20TH
- , SCALE TEST I i -
. j SY DR. RICHARD CORCETT
. . UNIVERSITY OF WASHINGTON a
i i
, PRESENTATION TO I
'l NUCLEAR REGULATORY COMMISSION BETHESDA, MARYLAND
' s i JUNE 29, 1983 i
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St OBJECTIVES OF SCALE MODEL FIRE TESTS i , e f
G CRITERIA FOR FIRE / FLAME OCCURANCE
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IDIFFUSIVE VS PUFF BURNINGl I O IF DIFFUSIVE, PREDICT:
- ' FLAME GEOMETRY I !
8 ASSOCIATED TilERNAL ENVIRONMENT 0
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INSUFFICIENT 0 2 i p Air ,i i
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- g PRIMARY AND SECONDARY FIRE SCAllNG CONCEPTS ,
j O MOLECULAR TRANSPORT " UNIMPORTANT" j G COMDUSTION IS DIFFUSION - (AS OPPOSED TO RATE-) CONTROLLED ,-
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- e T -4 L/V -L 5 i Ax L y oc. t 5/2
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$ IGNITION CRITERION - CRITICAL CONCENTRATION -
i l 0 CONDITIONS FOR VALIDITY I'
- FULL TURDULEilCE - HASICALLY A SIZE' REQUIREMENT 4
- NO PRE-MIXING - UBIOUITOUS IGNITION SOURCES,
,. lilGHLY IMPERFECT MIXING 4
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t PRIMARY FIRES - SCAllNG MARGIN - -
@ TURBULENCE *
- WITil IGN. - D EFF > I FT.
CR (PROBABLY LESS FOR ll 7 AT BASELINE FLOW)
- W/0 IGN, - D CR SLIGitTLY llIGilER i
e CONCENTRATION
- CRITICAL LOW fi I" "
FUEL EFF .
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- CRITICAL LOW " LOCAL AMBIENT" 0 . IF D EFF 2 p .. ,CR t ,
SECONDARY FIRES - SCALING MARGIN
@ PER PRIMARY FIRE ,
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LEFF } L CR 1 FT.
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PRIMARY FIRES - CONSEQUENCES OF D EFF
< m 1 FT. .. ,.
I O l.0WERS CRITICAL LOW M pgg( VIS A VIS FULL TURB. SCALING -
EST. ERROR RANGE FOR D,pp 5:: 5" : 20%
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. O INCREASES FLAME ilEIGitT l
EST. ERROR RANGE : 30%
i O OvERALL CIRCULATION SLIGilTLY RETARDED
) ; i i SECONDARY FIRES - CONSEQUENCED OF D EFF < = 1 FT.
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O PROBABLY DELAYS PRIMARY + SECONDARY TRANSITION EST. ERROR RANGE : 20% ,,
4 O PROBABLY DELAYS SECONDARY FIRE EXPIRATIort l
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- i EST. ERROR RANGE : 20% SECONDARY FIRE LIrETINE 4
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PRESERVATION.0F T - OVERAl.L CillMNEY' FLOW C00LDOWN . .
9 COLD-WALL BOUNDING EST. OF FLOW ENERGY LOSS i d LN AT =
3
~ __ _ .c< 1 d ( x/D) A x A x 8 .
REYNOLDS ANALOGY 1
WilERE A x = X-SECTION AREA, D = EFFECTIVE DI AN, P = EFFECTIVE :'ORINE SCAL.ING CONSIDERATIONS . PD/A g i
IS LOW IN H0 DEL BY FACTOR UP TO "SEVERAL." .
. F IS IIIGli l'N MODEL DY SMALLER FACTOR "
ESTIMATESOF(PD/Ay_(F/8) 1/20 PROTOTYPE !
0102 ,
0.05
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G CREDIT FOR WALL TEMP. RISE: X(PD/A ) (F/8) bil00LD BE DIVIDED BY
/T1 1/2 V/I o C 1+EfC K .
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- N lilERMALLY TillCK t
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- 0(1) r0R PROTOTYPE
- SCALING REQUIRES CK f3 3 3 *C L RCC 6/29/83 (7)
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SUMMARY
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l . .1/20TH SCALE TEST PROVIDES A MODESTLY CONSERVATIVE .
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REPRESENTATIONOFTHEEXPECJEDTHERMALENVIRONMENT
!' (RESdLTINGFROMDIFFUSIONFLAMES) IN A MK III CONTAINMENT -
i .- FOR THE,NO SPRAY CASE.
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