ML20206A613
| ML20206A613 | |
| Person / Time | |
|---|---|
| Issue date: | 04/26/1999 |
| From: | Wen P NRC (Affiliation Not Assigned) |
| To: | Carpenter C NRC (Affiliation Not Assigned) |
| References | |
| NUDOCS 9904280248 | |
| Download: ML20206A613 (25) | |
Text
{{#Wiki_filter::rog p% i UNITED STATES NUCLEAR REGULATORY COMMISSION of WASHINGTON, D.C. 2066M001 Q Ci / April 26, 1999 MEMORANDUM TO: Cynthia A. Carpenter, Chief Generic issues, Environmental, Financial and Rulemaking Branch Division of Regulatory improvement Programs Office of Nuclear Reactor Regulation FROM: Peter C. Wen, Project Manager M C. M Generic issues, Environmental, Financial and Rulemaking Branch Division of Regulatory Improvement Programs Office of Nuclear Reactor Regulation
SUBJECT:
SUMMARY
OF APRIL 13,1999, MEETING WITH ABB COMBUSTION ENGINEERING REGARDING ISSUES RELATED TO ABB -CE's NEW DNB CORRELATION On April 13,1999, a public meeting was held at the U.S. Nuclear Regulatory Commission's (NRC's) offices in Rockville, Maryland, between members of ABB Combustion Engineering Nuclear Power (ABB-CE), utility, and NRC staff. Attachment 1 lists attendees at the meeting. Most portions of the meeting involved discussion of proprietary information. Attachment 2 is a copy of the non-proprietary material handed out at the meeting. The purpose of the meeting was to provide an opportunity for ABB-CE to brief the staff on its development of the new DNB correlations. If approved by the staff, these new correlations would be used to support licensing analysis for ABB-CE PWR fuel. During the meeting, ABB-CE representatives provided a brief description of their current DNB correlation as well as that of the new correlations they intend to submit to the staff. The representatives also described ABB-CE's DNB tests, data reduction, and range of applicability associated with the new DNB correlation development. The major discussion was centered around the issues related to the content of the topical report and the staff's review schedule. These discussions are summarized as follows: 1 The staff indicated that review of the topical can be completed by the end of 1999 This e i target presumes a complete, good-quality topical is submitted by the end of May 1999 and is accompanied by a lead plant request to utilize the new DNB correlation. To preserve the staff's ability to perform independent verification, the staff expects that / 0 the source code and an executable file related to topical computer code should be submitted with the topical report (s). N7P ARC EU CEfdT33 MPP 990428o24a 99o426 Oi
- b PDR TOPRP ENVC-E C
PM
C. Carpenter The staff pointed out the importance of using appropriate accepted statistical methods when performing statistical calculations. Based on the ABB-CE'e presentation, the staff indicated that ABB-CE's approach of handling test data is technical sour:d. The staff also pointed out that duplicate data in the acquired database should not be included in the correlation database, and that a validating database needs to be identified and segregated out of the main database. The representatives of the NRC and ABB-CE agreed that this meeting was useful in accelerating the information exchange. Attachments: As stated cc w/atts: Mr. Charles B. Brinkman, Director Washington Operations ABB-Combustion Engineering, Inc. 12300 Twinbrook Parkway, Suite 330 Rockville, Maryland 20852 Mr. Ian C. Rickard, Director Nuclear Licensing ABB-Combustion Engineering, Inc. Post Office Box 500 2000 Day Hill Road Windsor, Connecticut 06095-0500 DISTRIBUTION: See attached page Document Name: g:\\pxw\\msum_dnb.wpd
- See Previous Concurrence OFFICE PM:RGEB: DRIP '
SC: SREP (A)SC:RGEB NAME PWen:sw Ttd EW5s TB[Mh DATE 04/ 4 /99 04 9-7 /99 04/16/99 OFFICIAL OFFICE COPY 49
Distribution: Mtg. Summary w/ ABB-CE Re New DNB Correlations Dated Anril 26: 1W Hard Coov Dechst FNs gs PUBLIC PGEB R/F OGC ACRS SMagruder PWen ' AAttard MChatterton EMA!! Scollins/RZimmerman BSheron WKane GHolahan/TCollins JWermiel RCaruso EWeiss DMatthews/SNewberry CCarpenter TBergman GTracey, EDO
NRCIABB-CE MEETING ON NEW DNB CORRELATIONS LIST OF ATTENDEES April 13,1999 NAME ORGANIZATION Eric Weiss NRR/SRXB Ralph Caruso NRR/SRXB Muffet Chatterton NRR/SRXB Tony Attard NRR/SRXB Peter Wen NRR/RGEB Virgil Paggen ABB-CE Paul Joffre ABB-CE Zeses Karoutas ABB-CE Joe Mihalcik BG&E Matt Kattic BG&E Rick Edward ETech
j New DNB Correlation for ABB CE PWR Fuel Meeting at USNRC April 13,1999 i i ABR =- Agenda < Objectives of Meeting < DNB Correlation Topical < Description of Current DNB Correlation (CE-1) < Description of ABB-NV DNB Correlation for non-mixing vanes < Description of ABB-TV DNB Correlation for Turbo mixing vanes < Optimization of Tong-F Factor for Non-uniform axial power shapes < DNB Correlation Statistical Tests and Trends < Schedule for DNB Correlation Topical AER
Objectives of Meeting +Present a detailed summary of the New DNB Correlation for ABB CE PWRs -ABB CE presented a brief summary to NRC on February 24,1999 +Present proposed schedule for ABB submittal and NRC approval - New DNB Correlation Topical for mixing and non-mixing vane fuel +Obtain NRC feedback and agreement in principle for new DNB Correlation Topical ABB = DNB Correlation Topical + Current DNB correlation for non-mixing vane ABB fuel is the "CE-1 Correlailon" -CENPD-162-P-A for uniform axial power shape data -CENPD-207-P-A for non-uniform data + DNB tests completed for Turbo mixing grid + New DNB correlation form developed -Similar form used for ABB 17x17 rnixing grid for European PWR market (based on 8 6x6 DNB tests) + New form will also be applied to CE-1 data base for non-mixing vane fuel ABB =
1 DNB Correlation Topical + New correlt.tlons will be submitted for both data sets (Similar form) -Without mixing vanes (CE-1 data 14x14 & 16x16) -With Turbo mixing vanes (14x14) + Topical will describe how correlation will be implemented for transition & equilibrium cores + Submit topical to NRC in May 1999 - Part 1 for non-mixing vanes - Part 2 for mixing vanes + Upon approval implement via 10CFR50.59 ABB =- Description of Current DNB Correlation (CE-1) for non-mixing vane grids CHF Correlation form proposed by Bamett for uniformly healed tubes based on assumpton that CHF + depends on local coolant conditions and knearty cependent with quality and inlet subcooling o'c.,, b1 (d/cm)*2 [ (b3 + b4P) (G) 88 * *-(G) (X) (hy J a (G) ow. w ien and DNBR = q'g,,y I (q'm
- Fw) where q',,,,
a Cntical Heat Flux based on uniform axial power shapes, Mbtu/hr-ft2 P = Pressure, pse G s local mass votocsty at CHF, M!b/ hr-ft2 X s local coolant Quanty el CHF. decimal fraction N = latent heat of vaponzation, Btih d a heated demeter of subchannel, ir,ches dm a heated derneter of metnx sAcnantui, inches q' = local heat flux. MDtu/hr-ft2 F,x = )LV Tong F-factor to correct q*e,,g or non-uniform ax:alpower shapes f
DNB Test Database for Correlation Development { ABB = DNB Test Database for Correlation I Development ABR =
CE-1 DNB Test Data & Statistics I Als3
== Typical 5x5 Test Geometry for CE-1 Data ay ...s m._ 2 2, 23 7 2 is is As 24 2s 27 i 4 5 2e 27 e i ex as e,m,o Test 47 Test 48 i ABL!
== CE-1 Range of AppilCability Pressure (psla) 1785 to 2415 Inlet tecnperature (Deg-F) 382 to 644 Local ecolant quality -0.16 to 0.20 Local mass velocity (Mlb/hr-ftz) 0.87 to 3.21 i 95/95 DNBR Limit for 14x14 1.15 95/S5 DNBR Limit for 16x16 1.19 ABB = Opportunities for improvement in CE-1
- CE-1 fits uniform axial power shape test data reasonably well(See Figure) however some tests not poolable
- Based on NRC SER of CEMPD-207-P-A worst tests selected to determine 95/95 DNBR Limits: 1.19 for 16x16 & 1.15 for 14x14 + CE-1 with Tong-F correction factor for non-uniform axial power shapes conservatively overestimates measured to predicted CHF (See Figure) - Optimize Tong F factor constants to better fit non-uniform data + Include geometry effects: grid spacing, heated length, cold wall, etc to improve correlation fit + Use primary CHF indications instead of mul'dple ABB =
1 l CE-1 Correlation fit to Uniform Data MCASURtc AND PRED:CitD CRI?! CAL H(Af FLU)!5 FOR ?>( Cg.t CORagun0N AND 5OURCE CATA L.0 i / s... .am !i c.e f ^ = ~.. C.4 g e. g C.2 e G 2 f 0 0 C. 2
- 0. 8
- 0. 6 08
- 1. C PR(CI**t2 CRIUCAL H;Af FLUX,10 gygfpg 472 6
= ABB CE-1 Correlation with Tong-F Factor Applied to Non-uniform data wAsuRco Aus everCiro CRinCat wAf styrts roa THE C4 1 CopRELAf!0N ANo C4 NON-UNIFORM ArJAL PowtR OATA 1' e 1.: a ge.
- i t
.t e n. 3 5 = o.4 a s o g;;m;sgmnw-E e.:
- "a ";"!!!a,7!L i
- 3:J'J"J':ii't
- C.",;*::!' ?,'7'"'"
L c.e i
- 0. 0 02 C.4 C.6
- 0. 0 10 PRIO!Cft) CRIUCAL MAT SLUR,1C $?VNRPI 0
= ggg MWW
i l i Description of ABB-NV DNB Correlation for t l Non-mixing Vanes ABB
== DNB Database Supporting New Correlation Form (9 terms) ABB
== e
~ ABB-NV Correlation for Non-mixing Vanes ABB = ABB-NV DNB Test Data & Statistics W ABB
Geometry for Special Tests ABB = ABB-NV Range of Applicability i Pressure (psia) 1750 to 2415 Inlet temperature (Deg-F) 370 to 644 Local cociant quality -0.18 to 0.22 Local mass velocity (Mlb/hr-ft2) 0.85 to 3.21 95/95 DNBR Limit for 14x14 & 16x16 <1.14 ABB =
Description of ABB-TV DNB Correlation for Turbo Mixing Vanes L ABB = Typical DNB Test Results (Cosine Test) ABB =
ABB-NV & ABB-TV DNB Test Data & Statistics 1 ABR = Typical 6x6 Geometry for Turbo Grid Tests ABB =
I J 1 ABB-TV Range of Applicability Pressure (psia) 1500 to 2415 Inlet temperature (Deg F) 250 to 630 Local coolant quality -0.12 to 0.24 Local mass velocity (Mlb/hr-ft2) 0.9 to 3.5 1 I 95/95 DNBR Limit for 14x14 <1.14 l ARR = i Optimization of Tong-F Factor for Non-I i uniform Axial Power Shapes 1 ABB = l q
Non-uniform Shapes for Tests 58 to 60,66 AX4AL POWER DISTRIOUTIONS i i e i 1.8 16 k 1A k 1J / d e o.0 1 I 1Aste y" 1.68 (T) i 1.64 (0) 1.47 (T) 0.0 0.'1 0.'4 0.' 0.'7 C.'8 0.' O 0-2 0.3 6 CA 0 1.0 FRACTION OF Hi ATED LENGTH ABR = ) Non-uniform Shape for Test 64 A2tAL POWE A Di3TRl0VTION FOR 71.1 TEST WITH THE POWER SPIKE (23% HIGHER POWER FOR A LINGTH OP 4 INCH 18) 1.s ) i 14 , 1.4 $12 I 1.0 i n l g' 0.8 \\ & 0.8 - 04 02 CD 0.'1 0.'2 0.'7 0 OJ 04 04 06 0.8 CA 1.0 FRACTION OF HE AT10 LENGTH ~ ARE =
e-Non-uniform shape for Test 93 i ABR = Description of Tong-F Factor M ABB =
c Methodology to Optimize Tong-F Factor ABB
== i F-Factor - Measured to Predicted CHF ABB
== w F-Factor - M/P CHF versus Mass Velocity ABS = F-Factor - M/P CHF versus Quality ABR i
F-Factor - M/P CHR versus Quality for G<1.7 ABR = DNB Correlation Statistical Tests & Trends + The following tests are being p6rformed for ABB-NV and ABB-TV DNB Correlations: -D' Normality tests to verify data is normally distributed -Perform Bartlett's test to assess homogeneity of variance among test sections + -Perform F test to test equality of means and determine whether DNB tests can be pooled if the variation in means is large adjust 95/95 DNBR limit + Perform scatter plots to verify ABB-NV & ABB-TV DNB Correlations show no significant trends with variables (See attached plots) ABB
Measured to Predicted CHF ~ -. ... m,__ _.. ./ ., d. . t~ y, g.. y.. G .~ c / ./ .lsesse. Clf, bE,ut.M ABB = M/P CHF versus Pressure ABB =
M/P CHF versus Mass Velocity ABB = MIP CHF versus Quality ABB =
Schedule for DNB Correlation Topical 4 3 ABR =}}