ML19225C655
| ML19225C655 | |
| Person / Time | |
|---|---|
| Issue date: | 05/30/1979 |
| From: | Parr O Office of Nuclear Reactor Regulation |
| To: | Sherwood G GENERAL ELECTRIC CO. |
| References | |
| NUDOCS 7908010635 | |
| Download: ML19225C655 (10) | |
Text
{{#Wiki_filter:~ 4 y h, UfJITED STATES ), NUCLEAR REGULATORY COMMISSION y 'f 3 .,( g. ' " /. C WASHINGTON D. C. 20555 k....e Central Files - Topical Reports Dr. G. G. Sherwood Manager - Safet/ and Licensing General Electric Company 175 Curtner Avenue San Jose, California 95114
Dear Dr Sherwood:
SUBJECT:
GE!1EPAL ELECTRIC TOPICAL REPORT, fled 0-20566-1, REVISI0ft 1, "GEtlERAL ELECTRIC COMPAtlY Af1ALYTICAL MODEL FOR LOSS-OF-C00LAtlT AtlALYSIS Ifl ACCORDAtlCE WITH 10 CFR 50, APFE!1 DIX K, AMEilDMEilT fl0. 1 - CALCULATIO1 0F LOW FLOW FILM BOILIrlG HEAT TRAilSFER FOR BWR LOCA AtlALYSIS" We have reviewed the subject topical report and find that we need additional information to complete our review. The specific information we require is enclosed. Please provide a date by which we can expect to receive responses to this request for additional information. Sincerely, hl-4 f OlanD.h'rrbief Pa Light Water Peactors Branch No. 3 Division of Project '1anagement
Enclosure:
Request for Additional Infonnation cc w/ enclosure: Mr. L. Gifford ' General Electric Company 4720 Montgomery Lane Bethesda, Maryland 20014 , y.) oso e m~ s, 9)o / 7 908010{3 p ~
Questions on NE00-20566-1, Rev. l 1. Figures 14, 25, 37 and 53 of NEDO-20566-1, Rev. I show the inlet flow variation for several tests from the BDHT program. These figures show that low flow exists in the " window" period and in the " post lower plenum flashing" period and thus support the contention that the modi-fied Bromley correlation is applicable to these periods. However, the same data are given in quarterly reports from the BDHT program and the results are quite different. The curves equivalent to those listed above are GEAP-13317-10, Figure 05.3; GEAP-13317-10, Figure Da.3; GEAP-13317-14, Figure D-2; and GEAP-13317-10, Figure 4-3. The flow data were presumably verified before inclusion in the quarterly reports. Please explain the differences in the data plots and explain why the data are supportive of the use of modified Bromley. 2. Compare the modified Bromley correlation to appropriate portions of data from the B0HT program with 8 x 8 fuel bundles; include tests from the BD/ECC pro;eam in the comparison. The purpose of this request is to extend the data base supporting modified Bromley to 8 x 8 fuel design and to the early portion cf the reflood transient. 3. Currently, the GE ECCS evaluation model applies the maximuu of Ellion or transition boiling heat transfer to the flooded portion of the rods after 1rwer plenum flashing. It is not clear how GE proposes to change this with modified Brcmley. Will the logic be the maximum of modified Bromley or transition boiling for this period or wili modified Bromley be used exclusively? 4. Figure IC.5.11 of NEDE-20566, p.I-356, shows that the Ellion correlation does a reasonable job of predicting the minimum heat transfer coefficient from RUN 159 in the single loop test apparatus. Modified Bromley would probably predict a higher heat transfer coefficient than was measured. Unless the data can be shown to not be applicable, compare modified Bromley to RUN 159 and other appropriate runs from the single loop test apparatus program. 09 g
NED0-20566-1/REV 1 ~ 6,5 MW NOMIN AL BRE A A ~ 50 - 45 - 40 - t 35 - 1 POST LOWER PLENUM WIN D OW, 30 + 3 PERIOD F L ASHING PERIOD Oj 25 20 'S 10 i 5 I I 0 O 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 TIME (sect Figure 14 Inlet Flow 1.ariation for Test 4910, Run 13 14 13 12I) C C C M Q% ~ EL EV A TION tin.) 9.4 11 1 14 075 10 O O ~- @ 4 C- - us 9 j 9.575 t0.75 14 5 d 8 C3-O J C- -O sa J 7 14.9 -g-g- 78 6 - BEST ESTtM ATE F ROM CALCULATIONS 5 AND D ATA PREDICTIONS O CALCULATED 4 O INFERRED FROM THERMOCOUPLE VE ASUR E ME NTS 3 I i I I I I I I I t I I I f f f l 2 0 1 2 3 4 5 6 7 8 9 to 11 12 13 14 15 16 17 18 19 20 TIME tsect Figure 15. Measured and Predicted Level in Bundle, Test 4910, Run 13 439 E 23
GE AP-1331710 40 4:i t CORE IPILET FLOW 10 20 ~ ~ JET PUMP SUCTION UNCOVERS AT 6J sw 5 / W '5 i / 5 i 3 b S ESTIMATED DUR;NG STARTING TRANSIENT j LOWER PLENUM FLASHING l' A975 AT 9.7 sec ~5 f I f f f f 8 f . g. -2 0 2 4 6 8 10 12 14 16 TIM F isect Figure DS.3. Test 4910. Rurs 13. Matnw Test 10. 6 5 MW. Nominal Break 60 LOWER PLENUM DENSITY BASED ON T40 AND/OR P 2 2 - 800 LOWER PLENUM FLASHING STARTS f f4 40 9 DP 13)' m 600 NODE 3 U DENSITY BASED CP 11 ( NOCE 2 f OP 10 ODE 1 5 r" e b i O 20 o 200 BLOWOOWN V A LVES CLCSED AT 4 7.5 see 0 O -10 0 10 20 30 40 50 60 70 80 f tVE isec) Fogare DS 4 Test 4910. Run 13. Matnx Test 10. 6 S MW. Nommal Break 25'$ 439 m m2
l NEDO-20566-1/REV 1 e 9 55 &O9 MW ANS + 20 NOMIN AL BR E AK i i 50 - t 45 - I. { 35 I , WINDOW POST LOWER PLENUM j PERICO F LASHING PERIOD a t 3 3 w 20 15 10 5 0 0 1 2 3 4 5 6 7 8 9 to 11 12 13 14 15 16 17 18 19 20 TIME (seci Figure 25. Inlet Flow variation fcr Test 4907, B n 10 14 13 '2C C C C C 'I ELEV ATION hn.) 'o C3 - -o- -o - C -o - - u 8 S 11 55 14.15 } ~ Q4-g g - -g - - g - 98 g d 9 11.5 14.75 f U 7 ~ 9.7 -{ - - g - 7g i 6 11.4 15.2 - BEST E.eTIM ATE F ROM CALCULATIONS e ANO D AT A PREDICTIONS l Q CALCULSTED O INFERRED FROM THERMOCCUPLE 4 M E ASUR EME NTS 3 t I i i i i i f i f i f i f i f i t i 2 O 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 I TIM E (sect t Figure 26. Two-Phase Level Measurements and Predictions in Bundle, Test 4907, r Run 10 n,) BLE
I wE AP-1331710 40 N - 15 ( CORE !NLET FLOW BASED ON OP4 l M t ') JET PUMP SUCTION j UNCOVERS AT 7.9 sec S g i E 5 4 5 u. 0 0 ESTIMATED OURlNG STARTING TRANSIENT t.OWER PLENUM FLASHING STAR TS AT 10.5 see -5 - 20 I d I -2 0 2 4 6 8 s0 12 14 16 TIM E (sect Fogure 04.3. Test 4907, Run 'O. Matnx Test 7. 6 09 MW, ANS + 20. ll~r -'t Break 60 1.OWER PLENUM DENSITY 2 BASED ON T40 AND/OR P-2 - 800 '1 .0 1 l h ] 60u j 1 DP N_00 E 3 OP NODE 2 5e OP(10) NODE 1 5 o ^ 7 400 3 OENSITY BASED ON CP 11 Z E 1 OENSITV NOOE 2 200 8 LOWOOWN' V ALVES CLOSEO AT 44.0 sec 2 LP OE'stTY 0 I - 10 0 10 20 30 40 50 60 70 80 O TIME iseci Figure C4 4 Test 4907. Run to. Matnx Test 7. 6 C9 MW. ANS r 20. Nommal Break 042 ea a.- pg a
NEDO 20566-1/REV 1 1.0 g A ff' ^ A ~ G nW'y. OR x u it L 9 S ELEVATION fin.) u f] A lta 06 0 78 I I I I I 1 I l l l I l l l 0 1 2 3 4 5 6 7 8 9 10 11 12 IJ 14 15 Tit / E lsect Figure 36. Calculated Void Fractions at Three Elevations Test 4907, Run 10 55 50 ~ 45 40 'g 35 3 g WINDOW O PERIOD POST LOWER PLENUM d 25 - F LASHING PE AIOD 20 15 10 5 I I I 0 I O 1 2 3 4 5 6 7 8 9 to 11 12 13 14 15 '6 17 18 19 20 Ieum TtME tocc) Figure 37 Inlet Flow Variation for Test 4914, Run 8 '.];9 c s,::
u". w1 # ,1I be / 5' 0 5 4 i 1 5 1 ( w ,,/ 1 t c e s 2 9 4 1 G 3 E G N 4 4 1 I C S H N T T 'S S i A E S S / L T E A L A T F B H P f Mg O XY O W I d F U R N L E TA 0 L E F 5 L B M1 P D lA R N l A E E O N ' 0 W T H 1 L E D MEG PE H D U U 1f J 8 J S w _sATN E OU lo F MNH t iev I c e e ro s / C g 7 k 7 _U / ) 2 2 1 ( c i n c ) s e a a s c )/ e f R 2 s E 1 t I 6 4 3 MI 4. P 'tA 6( T 1 D 9 Y S 4 MT H s t O NI E e R A V T F( T O R C WE N M 2 OC U O D LN FU N R T D I F e O r E T D u E L C E ig T NI A U T F S AE EMI P M C H T M I N TA OS U SL CE P E A T SB E E I 2 UW J LO AL VF W' y u l 0 ! r 2 0_ 2 0 2 i3 sw 4 4g J 9" N s
NEDO-20566-1/P W 1 55 50 6 09 VW, NOMIN A L B A E A K 45 40 35 f 3g WINDOW g POST LOWER PLENUM O PERICO g 25 F L ASH tNG P ER ICO 20 - 15 10 8 l o i i i i I I I t t I L t t I f f f 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 TIME isec) Figure 53. Inlet Flow Variation for Test 4904, Run 43 14 13 12 0 - --O O -O-0-0 O ~ ELEVATION bn.) ~ 9 g 118 = d 8 b) 9.0~ - ~ ~ U Q 90 11.5 15.35 7 96 0 -- T - 0 - 78 6 11 4
==== B EST ESTIMATE FROM CALCULATIONS 15.75 AND DATA PREDICTIONS 5 O CALCULATED i 41 - INFERRED FROM THERMOCOUPLE M E ASUR E ME NTS 3 I i f f l f i i i i i 1 f i f i f i 2 0 1 2 3 4 5 6 7 8 9 10 '1 12 14 14 15 16 17 18 19 20 TIME (sec) Figure 54. Two-Phase Level Measurements and Predictions in Bundle, Test 4904, Run 45 ff$Q h 47
.m...-- = =- _,x -g I GEAP 1331710 ~ 1200 1 JET PUMP SUCTION UNCOVE AS AT 7.4 sac - 8000 i LOWER PLENUM FLASHING STARTS AT 9.6 sec f 6000 800 ~. -i W E l E 1 L-L z U [ j z 400 - E BLOWOOWN VALVES CLOSED AT 49.5 sec 2000 O I I f I f f I O -10 0 10 20 30 40 50 60 70 80 TIME isect Figure 4-2. Test 4904. Run 45. System Pressure 40 - 15 10 20 3 JET PUMP SUCTION j UNCOVERS AT 7.4 see = E 5 E 5 3 / d S E a 0 0 E3TIMATED DU AING O STARTING TRANSIENT LOWE A PLENUM FLASHING ST ARTS AT 9.$ see -5 ,,20 -2 0 2 4 6 8 10 12 14 16 TfME isec) Fgure 4 3. Test 4904. Run 45. Ccre Intet Rcw (DP40) d 'o 42 '"/ N}}