ML19247A111
| ML19247A111 | |
| Person / Time | |
|---|---|
| Issue date: | 06/15/1979 |
| From: | Shotkin L NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| To: | Fabic S, Farmer W, Tong L NRC OFFICE OF NUCLEAR REGULATORY RESEARCH (RES) |
| References | |
| NUDOCS 7907300056 | |
| Download: ML19247A111 (6) | |
Text
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,o, UNITED STATES NUCLEAR REGULATORY COMMISSION e
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JUN1 5 975 To Those On The Attached List Gentlemen:
Subject:
Condensation Workshop Held in Silver Spring on May 24-25, 1979 The workshop recommendations for condensation models in TRAC are shown hA*
in Table I.
The recommendations are presented in terms of Q =QLi jj (T -TSAT) nd are intended for use in a calculation logic diagram such L
as that shown in Figure 1.
i QGi=0 unless the steam is superheated.
For this case, a recommer.dation i
was made for heat transfer from superheated steam to water drops:
Q
=h A (T -TSAT)
G1 jj g with h
'emined from the Ranz-Marshall relation 5
Pr /3 l
Nu =2+0.5 Re /2 l
l g
Enclosed are lists of papers handed out a) at the beginning of the meeting, and b) during the meeting.
i Copies of these papers can be obtained from NRC by request.
Sincerely, L. M. Shotkin Analysis Development BrancF Division of Reactor Safety Research
Enclosures:
as stated i
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JUN1 !> 1979 Addressees of Letter Dated L. S. Tong, NRC/RES S. Fabic, NRC/RES W. S. Farmer, NRC/RES N. Zuber, NRC/RES W. C. Lyon, NRC/RES Y. Y. Hsu, NRC/RES W. Beckner, NRC/RES G. Rhee, NRC/RES P. S. Andersen, NRC/RES, Consultant Z. Rosztoczy, NRC/NRR D. Liles, LASL B. Daly, LASL R. Pryor, LASL P. Bleiweis, LASL W. Rivard, LASL J. Mahaffey, LASL J. Block, CREARE P. Rothe, CREARE i
Professor Bharathan, Dartmouth j
R. Duffey, EPRI S. Levy, SLI G. Bankoff, NWU T. Theofanous, Purdue R. Tiller, DOE-ID P. North, INEL H. Sullivan, INEL M. Thurgood, PNL P. Saha, BNL R. Collier, BCL J. Andersen, GE L. Hochreiter, W i
FRG Representative c/o E. Dluzniewski E. Hicken t
l H. Kirmse H. Watzinger H. Viecenz l
JAERI Representative c/o K. Hirano Y. Murao l
PDR (2) 489 14I
TABLE I 5/79 WORKSHOP RECOMMENDATIONS FOR CONDENSATION MODELS IN TRAC, Q =hAj j (TL SAT); i = liquid / vapor interfece
-T 4
h 4
l Steam / Water Correction for Noncondensible Gas I
G G
-0.2
-2
,hi h = h, 0,366 [g2 wdi a
CONDENSATION OF STEAM ON St = 2 x 10 SUBC00 LED WATER JETS voc v
Note 1 h I h Note 2 j
2n 4"
MEAN "
II Nu -
- C 3
Same as for Jets CONDENSATION OF STEAM ON SUBC00 LED WATER DROPS RMEAN ^ W* ~ 4 C = 2.7 Note 3 1.
" Bridged" flow CONDENSATION IN Same as for jets Same as for jets 2.
f flow on DOWNCOMER DURING walls COLD-LEG INJECTION IV Total Pool CON A
0F STEAM
> 350 KW/M / *K No correction required Flow Area TIE-PLATE 4=-
T Note 4 Note 4 4
Note 1:
T. Theofanous, Paper presented at this meeting Note 2:
G. Shklover and M. Rodivlin, Teploenergetika, No. 4, P. 48,1976 A Note 3: Asymptotic conduction solution.
Factor C is for circulation-augmented conduction, R. Kronig and J. Brink, N
Applied Science Res., A2, 142 (1950). Nu=2Rh/k Note 4:
G. Bankoff and H. Yuen, to be published.
= h A,AT CALCULATE Q 9 9
SUBC00 LED WATER TEST COLD-LEG PHENOMEN p
SUBC00 LED WATER INTO STEAM CpN IN EACH CEL HDT-LEG DOWNCOMER'%
f MODELLING ST LIQUID DROPS MODEL FOR h9,A9 CONDENSATION JETS 0F STEAM V
V i
IN POOL DROP %___
JET h,A CONDENSATION CONDENSATION 9
j MODEL MODEL hj,A9 h9,A9 CALCULATE y
y y
0
~
3 n
CO
)[
x0 CONTINUE 2
FIGURE 1 L/J
P_ apers and Copies of Slides handed out during the meeting Background and Goals L. S. Tong, NRC Agenda and Workshop Procedure L. M. Shotkin, NRC ECCS with Combined Cold and Hot Leg Hicken, Kirmse, Watzinger, FRG Injection A Review of Condensation of Steam P. Saha, BNL on Subcooled Water Jets Applicable Models and Data in N. Zuber, NRC Russian Literature Interfacial Mass and Momentum Bankoff, NWU Transfer in Two-Phase Flow Slide Presentation of Bankoff Slide Presentation of BCL Collier, BCL Modeling of Basic Condensation Processes T. Theofanous, Purdue Slide Presentation of Theofanous Review of Water Spray into Steam S. Levy, SLI I
Slide Presentation of Levy BWR Experience on Spray Phenomena J. Andersen, GE Direct Contact Condensation in J. A. Block, CREARE Reactor Safety Research Slide Presentation by Daly, LASL
)
Slide Presentation by Yuen, NWU Slide Presentation by J. Andersen, GE Slide Presentation by Viecenz, Tech U. of Hanover, FRG Reporter Reconnendations 489 144
Papers Handed Out at the Beginning of the Meeting Excerpts on Condensation Modeling from the TRAC-P1 A Manual On the Unsteady Phenomena Relating to Vapor Suppression, T. Saito et al, ASME Paper 74-WA/HT-47,1974 Study of Condensation of Single Vapor Bubbles in a layer of Subcooled Liquid, A. Voloshko and A. Vurgaft, Heat Transfer, Soviet Research, _3_,160, March,1971.
Vapor-Liquid Interaction in a High Velocity Vapor Jet Condensing in a Coaxial Water Flow, R. Young et al, Notre Dame.
Condensation of Vapor on Free Cold-Liquid Jets, K. Dementyeva and A. Mikarov, Heat Transfer, Soviet Research, 9_,116, January,1974.
Condensation-Driven Fluid Motions, J. Block, CREARE, EPRI Workshop, Tampa, Fla.,
March, 1979.
Condensation of Steam on Water in Turbulent Motion, R. M. Thomas, To appear in Int. Jr. Ht. & Mass Transfer,1979.
Some Condensation Studies Pertinent to LWR Safety, S. Bankoff, EPRI Workshop, Tampa, Fla., March, 1979.
A Study of the Conden3ation of Vapour Jets Injected into Subcooled Liquid Pools, C. Greef, CEGB, England, RD/B/N 3267, March, 1975.
Microscopic Study of Dropwise Condensation, J. Welch and J. Westwater, International Developments in Heat Transfer, 1961-62, ASME.
489 145