ML17223A310
| ML17223A310 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 09/08/1989 |
| From: | Norris J Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8909120061 | |
| Download: ML17223A310 (19) | |
Text
September 8, 1989 Docket No. 50-389 LICENSEE:
Florida Power and Light Company FACILITY: St. Lucie Plant, Unit No.
2
SUBJECT:
MODIFICATIONS OF THE CE-I CRITICAL HEAT FLUX CORRELATION A meeting was held at the NRC offices in Rockville, Maryland on September 6,
1989, to discuss the Florida Power 5 Light Company and Combustion Engineering efforts regarding the modification of the CE-1 Critical Heat Flux Correlation.
The licensee outlined the general approach and the scope of the effort; then discussed plans for the future submittals.
The detai led agenda and attendance list are enclosed.
Enc losures:
As stated cc w/enclosures:
See next page Original signed by Jan A. Norris, Sr. Project Manager Project Directorate II-2 Division of Reactor Projects - I/II t SUMM6]
A.P I Mi 11 0
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DI -2 No i:jd 0 /
9 D:PDII-2 HBer kow 09/F /89 8909120061 890908 PDR ADOCK 05000389 PDC
CC:
Mr. Jack Shreve Office of the Public Counsel Room 4, Holland Building Tallahassee, Florida 32304 Senior Resident Inspector St. Lucie Plant U.S. Nuclear Regulatory Commission 7585 S.
Hwy A1A Jensen Beach, Florida 33457 State Planning 5 Development, Clearinghouse Office of Planning 5 Budget."
Executive Office of the Governor The Capitol Building Tallahassee, Flor ida 32301;:
Harold F. Reis, Esq.
Newman 5 Holtzinger 1615 L Street, N.W.
Washington, DC 20036 John T. Butler, Esq.
- Steel, Hector and Davis 4000 Southeast Financial Center Miami, Florida 33131-2398 Administrator Department of Environmental Regulation Power Plant Siting Section State of Florida 2600 Blair Stone Road Tallahassee, Florida 32301 Mr. Wqldon B. Lewis, County Administrator St. Lucie County 2300 Virginia Avenue, Room 104 Fort Pierce, Florida 33450 Mr. Charles B. Brinkman, Manager Washington Nuclear Operations Combustion Engineering, Inc.
12300 Twinbrook Parkway, Suite 330 Rockvi lie, Maryland 20852 Mr. Jacob Daniel Nash.
Office of Radiation Control Department of Health and Rehabilitative Services 1317 Winewood Blvd.
Tallahassee, Florida 32399-0700=
Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street N.W., Suite 2900 Atlanta, Georgia 30323 Mr. Campbell Rich 4626 S.E. Pilot Avenue Stuart, Flori da 34997 Mr. C.O. Woo+, Acting Senior Vice President-Nuclear Nuclear Energy Department Florida Power and Light Company P.O. 'Box 14000 Juno Beach, Florida 33408-0420
~ ENCLOSURE 1
FPL A enda or Meeti w't C
e a din
. I roved C itical Heat u
Co e t o Objective:
Discuss FPL/CE effort for St. Lucie Plant regarding the modification of the CE-1 Critical Heat Flux (CHF) correlation and exchange information between.
.FPL and the NRC to determine an acceptable review approach.
~Tc ic o
Need for Increased Thermal Margin J.
Handschuh o
FPL Studies of CE-1 CHF Correlation Improvements:
Modifications to Correlation Results with VIPRE J.
Handschuh o
Plan for Modifying CE-1, CHF Correlation for Licensing Analysis T. Rodack o
Schedule for Implementing Correlation Improvements in Licensing Analyses J.
Handschuh o
NRC Comments/Discussion
NRC MEETING WITH FPL AND CE CRITICAL HEAT FLUX CORRELATION IMPROVEMENTS JOEL HANDSCHUH FPL SUPERVISOR THERMAL HYDRAULICS
ST ~
LUCZE UNIT 2 DNB MARGIN o
CURRENT DNB LCO (LIMITINGCONDITION FOR OPERATION)
MARGIN o
1.54 OVERPOWER o
FPL GOALS o
MAINTAINNEGATIVE 10 CFR 50 59 RELOADS o
IMPLEMENT FUEL MANGEMENT IMPROVEMENTS o
NRC MEETING GOALS o
REVIEW CURRENT SITUATION AT ST.
LUCIE UNIT 2 o
PROVIDE INFORMATION TO NRC ON CHF IMPROVEMENTS o
OBTAIN FEEDBACK ON CHF IMPROVEMENTS FROM NRC
CURRENT DNB LCO o
LIMITED MARGIN FOR CYCLE TO CYCLE VARZATZON o
TARGET 3 4R MARGIN FOR FUTURE CYCLES o
MARGIN DECREASED IN CYCLE 5 DUE TO INCREASED CEA DROP TIME TECHNICAL SPECIFICATION Cy s
4
)
o LIMITED MARGIN FOR FUEL MANAGEMENT IMPROVEMENTS o
AXIAL BLANKETS (NEGATIVE IMPACT ON MARGIN) o GADOLZNZA (POSITIVE IMPACT ON MARGIN)
ST. LUCIE UNIT2 HISTORICALVARIATIONOF DNB MARGIN K
U CC X
O I
I I
'ROJECTED WITKOUT COUNTERMEASURES I
I II'
- 't I.I................. ~....
INDUSTRY RECOMMENDED 1
"""""I I
I 1.5%
1.5%
0 2.&o 2.%i GOOD 8
1w Z U 0
m C w z z ~
0 w E
~2 C1 3
-1.5%
I I
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1.5'ARGET
-2.65'Ye
-3.5'Yi PLANTOPERATlNG CYCLE DtRMAAGC.0RW
$21/N ASM/BAH
CALCULATED MARGIN GAINS MODIFIED CE 1 WITE VZPRE o
EVALUATED COLUMBIA 16x16 PUEL ASSEMBLY CHP TEST. DATA o
LIMITING TEST SECTION REMAINS UNIFORM CASE o
DNB LIMIT WOULD REMAIN NEAR CURRENT LIMIT o
EPFECT OF COLD WALL MODZPZCATZON SMALL o
EVALUATED POTENTIAL BENEFIT OP MODIFICATION TO CE-1" P
o LOSS OF FLOW TRANSIENT USING VZPRE/MODIFIED CE-1 o
LOSS OF PLOW TRANSIENT USING VZPRE/CE 1
LOSS OF FLOW TRANSIENT TIME D
COMPARISON OF LOSS OF FLOW RESULTS VIPRE/MODIFIED CE-1 vs.
VZPRE/CE-1 VXPRE MODXFXED CE-1 VXPRE CE 1
MINIMUMDNBR 1 357 1 ~ 322 TIME OF MDNBR 3 ~ 0 SEC 3 '
SEC AXIAL LOCATION MDNBR 126 ~ 3 ZN+
129 '
ZNo
!GLRGZB GAZB
~2 ~ 65
CE PLANS FO MODIFICATIO OF CE-1 CHF CORRELATIO PRESENTATION To NRC SEPTEMBER 6g 1989 T.
RODACK SUPERVISOR, CE THEmmL HmmuLIC DESIGN & ANALYSIS
RRELATI 1.
ESTABLISH CORRELATION MODIFICATIONS XN CONSULTATION WITH FP&L
- MODIFY COLD WALL CORRECTION TERM ELIMINATE NON-VNXFORM AXIAL POWER DISTRIBUTION (APD)
FACTOR (1'ACTOR) 2.
IMPLEMENT MODIFIED CORRELATION XN TORC AND CETOP COMPUTER CODES 3.
ESTABLISH MODIFIED CORRELATION M/P STATISTICS FOR.
CE-1 DATABASE
- 6 UNIFORM APD TESTS
- 4 NON-UNIFOm APD TESTS 4.
ESTABLISH DNBR LIMIT FOR MODIFIED CORRELATION'
PLA ED APPLX ATIO F MODIFIED F
RRELATXO 1.
SUBMIT REPORT TO HRC THROUGH ST.
LUCXE 2 DOCKET FOR, REVIEW 2.
ESTABLISH IMPACT OF MODIFIED CORRELATXON ON PLANT SPECIFIC SAFETY AND SETPOXNT ANALYSES IN RELOAD ANALYSES 3.
PROPOSE MODIFIED CHF CORRELATION TO UTXLXTIES FOR RELOAD ANALYSIS OF CE CORES
P TE TEAL F RE CHF RRELATX I PR VEME 1.
MOnXm CORRELATION FORM TO IMPROVE MODELXNG OF:
SPACER GRID EFFECTS HEATED LENGTH EFFECTS 2.
INCREASE SIZE OF DATA BASK TO SUPPORT CORRELATION IMPROVEMENTS (E.G.
DIFFERENT HEATED LENGTHS AND GRID SPACING) 3.
DETERMXNE SEPARATE DNBR LIMITS FOR 14X14 AND 16X16 FUEL IF NEEDED 4.
EXPECTED OVERPOWER MARGIN GAIN 2 TO 5~o
CONCLUSIONS o
MARGIN GAINS ARE AVAILABLEBY MODIFYING THE CE-2 o
FOR 16Z16 FUEL~
NO CHANGE ZN MINIMUM DNBR VALUE o
SIMILAR WORK PREVIOUSLY APPROVED BY NRC o
FEEDBACK FROM NRC NEEDED ON APPROACH PRIOR TO BEGINNING WORK
ENCLOSURE 2 MEETING BETWEEN FLORIDA POWER AND LIGHT COMPANY AND NRC STAFF - ST.
LUCIE Regarding Critical Heat Flux Corrolation September 6,
1989 NRC J. Norris S.
Long C. Daily S.
Hoffman L. Lois CE E. Trapp Z. Karoutas L. Jarriel T.
Rodack FPL P.
Sharp M. Dryden J.
Handschuh G. Arpa BG&E M. Massoud
DISTRIBUTION FOR MEETING
SUMMARY
DATED:
September 8, 1989 Facility:
St. Lucie j
Docket File4 NRC 8 Local PDRs J. Sniezek, 12/G/18 PD II-2 Reading S.
Varga, 14/E/4 G. Lainas, 14/H/3 H. Berkow J. Norris D. Miller OGC E. Jordan, MNBB-3302 S.
Long P-315 C. Daily P-315 S.
Hoffman L. Lois 8/E/23 ACRS (10)
R. Borchardt, 17/G/21 M. Sinkule, RII
- Copies sent to persons on facility service list
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