ML093130440

GNF-0000-0100-8106, Gnf Additional Information Re Requested Changes to the Technical Specification SLMCPR, Vermont Yankee Cycle 28.

ML093130440
Person / Time
Site:	Vermont Yankee
Issue date:	09/21/2009
From:	Global Nuclear Fuel - Americas
To:	Office of Nuclear Reactor Regulation
References
GNF-0000-0100-8106
Download: ML093130440 (24)

Text

Docket No. 50-271 09-063 BVY 09-063 Attachment Attachment 6 .

Vermont Yankee Nuclear Power Station Technical Specification Proposed Techrlical Specification Change Change No. 287 GNF Summary of Technical Values Technical Basis for SLMCPR Values (Non-Proprietary Version)

GNF NON:-PROPRE1Efll'~Y GNE" [NFORMATION NON-PROPRIET,ARY HORMA]10Nl Class I CFass E GNF GNP' Attachment AMaelilment 9/2.112009:

9/21/2009 GNF-OOOO-O 100-8 r06 GNF-0000-0100-8106 eDRFSection: 0000-0100-8106-RO eDRFSection: 0000-01.00-8106-RO GNF Additional Information Regarding Regarding the Requested Changes to the Technical Specification SLMCPR Technical Specification SLMCPR Vermont Vermont Yankee Cycle 28 Vermont Vermont Yankee Cycle 28 Yankee Cycle Page I1 of23 of 23

GrNFNON::'PRJi)17lmaTARY GNF NON-PROPRIETARY JINFORMATION liNilFORMAlITONi Class K.

Class:

GTNiFt GNF Attachment AHadlment .

P: n'OpDTCT*/t PROPRIETARY

~" ~':, ~, DY* T/ii;,1lE:OD1'LIri/t'T'FO*

!l1l"U.-'~ t /~vlrl, Ji' il\,liN*O*TIC'C*

INFORMATION  ! 'll"l1 NOTICE

1, 'Ji:j, This document is the GNF This: document non-proprietary weliSion GNP non-propri.etaJIy version of the GNF ofthe GNF proprietary report. From the proprietary report.

GNFF proprietary version, the information GNF proprietaJIy information denoted denoted as as: GNIF GNF proprietary (enclosed in double proprietaJIy (endosed double brackets) was deleted to generate this version,..

version.

Important Notice Regarding Regardi.ng Contents of this Report Please Read Carefully Read Carefully The only undertakings undertakings of Global Nuclear Fuel-Americas, Fuel-Americas, .L.LC LLC (GNF-A) with respect to information information in this document are contained contained in contracts between GNF-A and its customers, and and nothing contained contained in this document shall be construed as changing changing those contracts. The use of this information by anyone other than those participating entities and for any purposes purposes other than those for which it is intended is not authorized; and with respect to any unauthorized unauthorized use, GNF-A GNF-A makes no representation representation or warranty, and assumes no liability as to the .the completeness, accuracy, accuracy, or usefulness of the information information contained in this document.

Page 2 of 23

GNF NON'-PROPRIEFTEY IliNiIfOR:MA1i10N GNFNON::"PROPruEll'ruty FORMATION!

C~ass:

Class I E

GN' Att!aellmenF GN!lF Attachment Table of Contents 1.0 METHODOLOGY METHODOLOGY ..........................................................................................................................................

.................................................................................................................................... 44 2.0 DISCUSSION ...................................................................................................................................................

DISCUSSION .............................. . ............... ....................................................................... 4 2.1.

2.1. MAJOR CONTRIBUTORS CONTRIBUTORS TO SLMCPR SLMCPR CHANGE .............  : ................................................................................ 4 2.2. DEVIATIONS IN DEVIATIONS INNRC-APPROVED NRC-ApPROVED UNCERTAINTIES .................................................................................... 55 UNCERTAINTIES .........................................................................................

2.2.1. R-Factor R -Factor. .................................................................................................................................................

................................................................................................................................................ 5 2.2.2.

2.2.2. Core Core How Flow Rate and and Random Effective TIP Reading Reading.............................................................................

.................................. 5 2.3. DEPARTURE FROM DEPARlURE NRC-APPROVED METHODOLOGY FROM NRC-ApPROVED METHODOLOGY ..............................................................................

.................................................................................... 5 2.4. AXIAL POWER SHAPE PENALTY FUEL AxIAL ............................................................................. ........................ 6 PENALTY ............................................................................................................

2.5. METHoDOLOGY ......................................................................................................................

METHODOLOGY RESTRICTIONS ...................................................................................................................... 7 2.6. MINIMUM CORE FLOW CONDITION MINIMUM ................................................................................................................

CoNDITION ................................................................................................................ 7 2.7. LIMITING CONTROL ..............................................................................................................

CONTROL ROD PATTERNS .............................................................................................................. 7 2.8. MONITORING SySTEM CORE MONITORING ....................... !, .................................................................................................

SYSTEM ....................... .................................................................................................. 7 2.9. POWERlFWW POWER/FLOW MAP .........................................................................................................................................

M AP .......................................................................................................................................... 7 2.10. LOADING DIAGRAM CoRE LoADING ......................................................................................................................

DIAGRAM .......................................................................................................................... 77 LL.

2.11.

2. FIGURE ................................... . .............................. ......................

FIGURE REFERENCES .................................................................................................................................. ............ 77 2.12. ADDITIONAL SLMCPR ADDITIONAL ................................................................................ 7 SLMCPR LICENSING CONDITIONS .......................................................................................

2.13.

2.13.

SUMMARY

SU M M ARY ...................................................................................................................................................

.................................................................................................................................................. 8 3.0 ................................................................................................................................................

REFERENCES................................................................................................................................................. 9 List of Figures FIGURE FIGURE I. 1. CURRENT CYCLE CORE CURRENT CORE LOADING DIAGRAM .........................................................................................

.............................................................................................. 10 10 FIGURE FIGURE 2. CYCLE CORE LOADING PREVIOUS CYCLE LoADING DIAGRAM ..............................................................................................11 DIAGRAM .............................................................................................. 11 FIGURE FIGURE 3. FIGURE 4.1 FROM NEDC-3260 I-P-A .....................................................................................................

I-P-A ......................................................................................................... 12 12 FIGURE 4. FIGURE 111.5-1 FROM NEDC-3260IP-A FIGUREIII.5-1 NEDC-32601P-A ......................

...................... l,.........................................................................

............................................................................. 13 13 FIGURE 5.

FIGURE FIGURE Ill.5-2 ................................................................................................

NEDC-32601P-A .....................................................................................................

111.5-2 FROM NEDC-3260IP-A 14 14 List of Tables TABLE 1. DECIPIN FCOE.

TABLE 1. DESCR1PTION OF CORE.............................................................................................................................. ?,a...15 TAL .DESCRIPTION OF CORE ................................................................................................................................

.. 15 TABLE 2. SLMCPR TABLE SLMCPR CALCULATION METHODOLOGTES METHODOLOGIES .............................................................................................

................................................................................................ 16 TABLE 3. MONTE CARLO TABLE CARLo CALcULATED CALCULATED SLMCPR VS. vs. ESTIMATE ..........................................................................

ESTIMATE ..............................  ;............................................... 17 TABLE NON-POWERDISTruBUTION UNCERTAINTIES TABLE 4. NON-POWERDISTRJB1ITION ...............................................

UNCERTAINTIES .............................................................................................. 19 TABLE 5. POWER DISTRIBUTION TABLE5. ...................... .........................

DISTRIBUTION UNCERTAINTIES ................................... . . ......................... 21 TABLE 6. CRITICAL POWER 6.CRInCAL ................... ....... ................ ......... ..........................23 UNCERTAINTIES ..................................................................................................................

PO\VER UNCERTAINTIES 23 Table of Contents Contents Page 3 of of23 23

GNF NON-PROPRIETARY IINlIFORMA1l10Nl GNFNON:'PROPR.EIEIrMV INFORMATION Cl1ass IfI Class:

G1NlF GNF Ati1iachmmt Attachment 11.0 M~thodology 11.,0; Methodology .

GNF peri'mmed GNIF performed the Verm.ont Vermont Yankee C.ycle Cycle 28 Safety Safety Umit Limit .Minimum Minimum C.ritical, Critical Power Ratio Ratio (SLMCPR) calculation in accordance (SILMCPR) accordance to NEUB-24011l.-P:..A NEDE-240I1-P-A '"General "General Electri.c Electric Standatrdi Standard Application for Reactor Fuel" Application Fuel" (Revision 16) using the following NRC-approved NRC-approved methodologies:

methodologies and uncertainties:

" NEDC-32601P-A "Methodology

.NEDC-32601P-A "Methodology and Uncertainties Uncertai nties for Safety Limit MCPR Evaluations'"

Evaluations" (August 1999).

• " NEDC-32694P-A "Power "Power Distribution Uncertainties Uncertainties for Safety Limit MCPR 1999).

Evaluations" (August 1999), .

• " NEDC-32505P-A NEDC-32505P-A "R-Factor "R-Factor Calculation Calculation Method for GEll, GEl 1, GEI2 GE12 and GE13 Fuel" Fuel" (Revision (Revision 1,1, July 1999).

• • NEDO-10958-A "General NEDO-10958-A "General Electric.BWR ElectricBWR Thermal Thermal Analysis Basis (GETAB):

(GETAB): Data, Correlation Correlation and Design Application" Application" (January (January 1977).

Table 2 identifies identifies the actual methodologies methodologies used for the previous Cycle 27 and the current Cycle 28 SLMCPR calculations.

2.0 Discussion In this discussion, the TLO nomenclature nomenclature is used for two recirculation recirculation loops in operation, operation, and the SLO nomenclalure nomenclature is used for one recirculation loop in operation.

2.1.

2.1. Major Contributors to SLMCPR Change Change In general, the calculated safety safety limit is dominated by two key parameters:

parameters: (1)(I) flatness of the core core bundle-by-bundle bundle-by-bundle MCPR distribution, and (2) flatness of o( the bundle bundle pin-by-pin pin-by-pin power/R-powerlR.-

factor distribution. Greater Greater flatness in either parameter yields either parameter yields more rods susceptible susceptible to boiling boiling transition and thus a higher calculated SLMCPR higher calculated SLMCPR. MIP (MCPR Importance Importance Parameter) measures measures the core bundle-by-bundle bundle-by-bundle MCPR MCPR distribution distribution and RIP (R-factor (R-factor Importance Importance Parameter)

Parameter) measures measures the the bundle bundle pin-by-pin power/R-factor distribution. The impact pin-by-pin power/R-factor impact of the fuel loading loading pattern pattern on the calculated TLO SLMCPR calculated TLO SLMCPR using rated core power and rated core core flow conditions conditions has been correlated correlated to the parameter parameter MIPRIP, which combines combines the MIP and RIP values.

Table Table 33 presents presents the MIP and the MIP RIP parameters and RIP parameters for the previous previous cycle cycle and the current cycle along along with the TLO 11.0 SLMCPR SLMCPR estimate estimate using the MIPRIP MIPRIP correlation. If the minimum core flow case case is applicable, the TLO SLMCPR SLMCPR estimate is also provided provided for that case although the the MIPRIP correlation correlation is onlyonly applicable applicable to the rated rated core flow case. This is done only to provide provide some some reasonable assessment basis reasonable assessment basis 'Of of the minimum core core flow case trend. In addition, Table 3 presents Table presents estimated estimated impacts on en the 11.0 TLO SLMCPR SLMCPR due due to methodology methodology deviations, deviatiens, penalities, and/or penalities,andior uncertainties deviations uncertainties deviations from approved approved values. Based on the MIPRIP correlation

,correlation and and any any impacts impacts due due to deviations from to deviations approved values, from approved values, a .final final estimated estimated TLO SLMCPR SLMCPR is determined.

determined.

Methodology Methodology Page 4 of 23 Page40f23

NOt'[..PROPR]EIj'~Y I!NJFORMAlITON GNF NON-PROPRIETARY NFORMATION Class, Clasg, [

GNF Attachment GN,, Attacnme1i1t' Table Tab~e 3 also provides the actual calculated, M.'onte Carlo calculated. Monte SLMCPRs. Given C'ati~Oi SJLMCPRs. Given the bias and tlRcertainty in the MIPR[P uncertainty correlation K[

MIPRIP correlation (( t3))) and the inherent

{J})) inherent vati'iation in the Monte variation Monte: Carlo results (( {3'))~,

11)) the. change in the Vermont the: change Vermont Yankee Yankee Cycle 28 calculated Monte Carlo TLO SLMCPR using rated core calculated COlle power and rated core flow conditions is is:

consistent corresponding estimated TLO consistent with the corresponding no SLMCPR SLMICPR value.

2.2. Deviations NRC-Approved Uncertainties Deviations in NRC-Approved Uncertainties NRC-approved uncertainties along with values actually used. A Tables 4 and 5 provide a list of NRC-approved Tables NRC-approved values follows; all of which are conservative discussion of deviations from these NRC-approved conservative NRC-approved values. Also, estimated impact on the SLMCPR relative to NRC-approved SLMCPR is provided Table provided in Table

'3 for each deviation. .

2.2.1.

2.2.1. R-Factor R-Factor generically increased the GEXL R-Factor uncertainty At this time, GNF has generically uncertainty from ((

(3})) to account for an increase in channel bow due to the emerging (3}]) to account for an increase in channel bow due phenomena emerging unforeseen phenomena corrosion-induced channel bow, which is not accounted called control blade shadow corrosion-induced accounted for in the the channel bow uncertainty uncertainty component approved R-Factor uncertainty.

component of the approved uncertainty. The step "0 "a RPEAK" RPEAK" NEDC-3260IP-A, which has been provided in Figure 4.1 from NEDC-32601P-A, provided for convenience in Figure 3 of of this attachment, is affected byy b this deviation. Reference Reference 4 technically justifies that a GEXL R-uncertainty of ((I Factor uncertainty (( 63})))) accounts uncertainty of up to ((

channel bow uncertainty accounts for a channel ( 3 ))).

{3})).

Currently, Vermont Yankee has not experienced Currently, corrosion-induced experienced any control blade shadow corrosion-induced channel bow and is not expected to experience experience any in Cycle 28 to the extent that would would invalidate the approved R-Factor uncertainty.

invalidate 2.2.2. Core Flow Rate and Random Random Effective Effective TIP Reading Reading At this time, GNF has not been able to show that the NRC-approved NRC-approved process to calculate the '

SLMCPR only at the rated core power SLMCPR power and rated core flow condition is adequately bounding calculated at rated core power and minimum core flow, see Reference relative to the SLMCPR calculated Reference 5. 5.

The minimum core flow condition can be more limiting due to the control rod pattern used.

GNF has modified the NRC-approved NRC-approved process for determining determining the SLMCPR SLMCPR to include include analyses analyses at the rated core power and minimum licensed core flow point in addition to analyses at the rated core power and rated core flow point. GNF believes conservative and may believes this modification is conservative justification that the original in the future provide justification NRC-approved process is adequately original NRC-approved adequately bounding.

The available flow range at rated power, 99% 100% rated core flow, does not warrant 99% to 100% warrant analysis at the minimum core flow point.

2.3. Departure from NRC-Approved 2.3. Departure NRC-Approved Methodology Methodology No departures from from NRC-:approved methodologies were used in the Vermont Yankee NRC-approved methodologies Yankee Cycle 28 SLMCPR calculations.

Discussion Page 5 of 23

GN NON-PROPRllJE:1f~'t?

GNf NON-PROPR[ETARY IITNilFORMlAll0N IFORMATION Class Class: fI GNIF GlNiF Attachment-Amiadmr:1ilit Fuel Axial Power Shape 2.4. F'uel, Shape' Penalty Penalty At mils At this time, GNF has detetmined determined that that highetr higher uncertainties non-conservative biases utlcel11arnmt1es: and mOl1-conservative in the biases: Ln tlte; GEXL correlations GEXIL correlations for the various:

various types.

types of aoo:i:aI!

axial power shapes shapes (i.e (i.e_,.* inlet, cosine, outlet and oudet and[

hump) could potentially exist double hllmp) exist relative to to the, NRC-approved methodology values~

tlte NRC'-appFOved. values, see see References 3, References 3~ 6, 7 and 8.

8. The folowing foHowing table tab;le identifies, by marking marking with an, an "X",

<<X", this potential potential!

product line currently being for each GNF pFOduct being offered:.

offered:

((

((

{3}1

))

Axial bundle power shapes corresponding corresponding to the limiting SLMCPR control blade patterns are determined determined using the PANACEA PANACEA 3D core simulator. These axial power shapes are classified classified in accordance accordance to the following table:

((

I

. \ l3}))

If the limiting bundles bundles in the SLMCPR SLMCPR calculation calculation exhibit an axial power shape shape identified by this table, GNF penalizes table. penalizes: the GEXL critical power uncertainties to conservatively conservatively account for the the impact of the axial power shape. TableTable 6 provides a list of the GEXL critical power uncertainties uncertainties determined determined in accordance accordance to the NRC-approved methodology contained NRC-approved methodology contained in NEDE-24011-P-A NEDE-2401 1-P-A along with values actually used.

bundle~ the fuel axial power shapes in the SLMCPR For the limiting bundles, SLMCPR analysis examined to analysis were examined determine determine the presence of axial powerpower shapes identified in the above table. These power shapes were not found; therefore~

therefore, no power shape penalties penalties were applied applied to the calculated calculated Vermont Yankee Cycle ý28 SLMCPR values.

Yankee Cycle.28 Discussion Page 6 of 23 Page*60f23

GNF NON'-PROPR]E[Jl'~Y GNP NON-PROPRETiARY JiN!JFORMAlITONl mORMATION Class,E C~ass I GNF, A1it!aemment GNF Attachment-2.56. M'ethodology 2.5., Restrictions Methodology Restrictions The, four restrictions identified on Pag~:

The; Page. 3 of lNlRC"s NRC's Safety Evaluation Evaluation relating to the Genefal:

General Electric Licensing Topical Reports NEDC-J26@ilP~

Efectric NEDC-32601 P. NEDC-32694P, and Amendment Amendment. 25 to NEDE-2401 1-P-A (March 11, NEDE-24011-P-A 11, 1999) are addressed En in References 1,2,3, t, 2, 3, and 9.

No new GNF fuel designs are being intmduced introduced Inin Vermont Yankee Cycle 28~ 28; therefore, the the:

NEDC-32505-P-A statement" NEDG-32505-P-A statement "... if new fuet

... if fuel is introducted, GENE must confirm that the revised R-Factor method is still valid based on new test data data"n is not applicable. The GNF2 product line considered a new fuel design relative to the GE14 is not considered GEl4 product line, as both consist of 10 x 10 10 lattice designs.

2.6. Minimum Core Flow Condition Condition The available flow range at rated power, 99% to 100% 100% rated core flow, does not warrant analysis analysis at the minimum core flow point.

2.7. Limiting Control Rod Patterns Patterns The limiting control rod patterns used to calculate the SLMCPR reasonably assures that at least 99.9% of the fuel rods in the core would not be expected expected to experience experience boiling transition during

~ormal normal operation or anticipated operational operational occurrences during the operation of Vermont Yankee Cycle 28.

2.8. Core Monitoring System For Vermont Yankee Cycle 28, the 3D Monicore Monicore system will be used as the core monitoring system.

2.9. Power/Flow PowerlFlow Map Map

. The utility has provided provided the current and previous cycle cycle power/flow map in a separate attachment.

2.10. Core Loading Loading Diagram Diagram Figures 1I and 2 provide the core loading loading diagram for the current and previous cycle respectively, which are the Reference Reference Loading Pattern as defineddefined by NEDE-2401 NEDE-24011-P-A1-P-A. Table Table 1 provides a description description of the core.

2.11.

2.11. Figure References References Figure 3 is Figure 4-1 4.1 from NEDC-32601-P-A.

NEDC-3260l-P-A Figure 4 is Figure Figure II.5-1 ID.S-l from NEDC-32601P-NEDC-3260lP-A. Figure Figure 5 is Figure ID.S-2

-1.5-2from NEDC-32601P-A.

NEDC-32601P-A.

2.12. Additional SLMCPR Licensing Conditions Additional SLMCPRLicensing Conditions For Vermont Vermont Yankee Yankee Cycle Cycle 28, the additional additional SLMCPR SLMCPR licensing licensing condition condition (Reference (Reference 10)

10) that the SLMCPR SLMCPR shallshaU be established established iby by adding 0.02 to the cycle-specific cycle-specific TLO TLO SLMCPR SLMCPR value value Discussion Page 7 of 23

\

GNF NON-PROPRIETARY INFORMATION GNFNOWr:'PROPmE1fARll'mIFORMAlITON

. <=~fLSs*i Class T GNlF Attachment G-NF Atrnadlmem1t calealatedi calculated uSIng using the NRC-applTOved methodo~<!lgiies\

the. NRC-approved methodolofies doeamented documented in in NEDE-24011-P-A beetil!

NEDE-240 11-P-A has been applied (see TaMe applied, (see Table J).3). This adder does:

does not:

not appUy apply totEl> the: c:yde,..speciifi.c the,cyle- SLMCPR,. because specific SLO SLMCPR, because; s1![ch such, operation. Technical Specifi.~on peration would by Technical Specification \be be Diimilted limited t<!l' to less than.

than the t1593 MNWt llowelr 593 MWt power, tmreslit<!lld specifi.ed in Reference threshold specified Reference 10.

]Oi.

2.13... Summary 2.,13 The requested changes to the TechnicalTechnical Specification Specification SLMCPR SL-MCPR values are 1.09 for TLO and and 1.10 for SLO for Vermont 1.10 Vermont Yankee Cycle Cyde 28.

Discussion Page 8 of23 of 23

GNF NON-PROPRIETARY INiFORMAlITONi GNFNON-PROPR:JjE'Ii~.RY INFORMATION' Class,((

CFas$

GNF Attaellrn:ent G'NlF Attachment-3.0 References 3'.,0 References 1 Letter, Glen A.

1.. A. Watford (GNF-A) to ýU.S_

(GNP-A) Nuclear Regulatory Commission Document U. S. Nudeali Document Pulsifer (NlRC)"

Control Desk with attention to R. Pu]siJfetr (.NRC), '"Continnati "Confirmation 10x lO on of lOx 10 Fuel Design Applicability to Improved SLMCPR" Applicability SLMCPR, Power Distribution and. and R-Factor Methodologies,

Methodologies",

FLN-2001-016, September 24, 200L 2001- ,

2. Letter, Glen A. Watford (GNP-A)

2. (GNF-A) to US.U.S. Nuclear Regulatory Commission Document to J. Donoghue (NRC), "Confirmation Control Desk with attention toJ. "Confirmation of the Applicability of the GEXL 1414 Correlation and Associated R-F R-Factor Methodology for Calculating actor Methodology Calculating SLMCPR Values in Cores Containing GE14 Fuel", FLN-2001-017, October 1,2001. 1, 2001.

3. Letter, Glen A. Watford (GNP-A)

(GNF-A) to US.U.S. Nuclear Regulatory Commission Commission Document Control Desk with attention to Joseph E. E. Donoghue (NRC), "Final"Final Presentation Material for GEXL Presentation - February 11,2002",

11, 2002", FLN-2002-004, FLN-2002-004, February 12,2002.

12, 2002.

4. Letter, John F. Schardt (GNF-A) to U.S. Nuclear Regulatory Commission Document Commission Document Control Desk with attention to Mel B. Fields (NRC), "Shadow C()ntrol "Shadow Corrosion Effects on SLMCPR Channel Bow Uncertainty",

Uncertainty", FLN-2004-030, November 10; FLN-2004-030, November 10, 2004.

5. Letter, Jason S.

5. S. Post (GENE) to US. U.S. Nuclear Regulatory Commission Document Control Desk with attention to Chief, Information Desk with attention Chief, Information Management Management Branch, et al. (NRC), "Part 21 Final Report:

Final Report: Non-Conservative Non-Conservative SLMCPR", MFN 04-108, September September 29,2004.

29, 2004.

6. Letter, Glen A. Watford (GNF-A) to U.S. US. Nuclear Regulatory Commission Document Commission Document Control Control Desk with attention to Alan Wang (NRC), "NRC Technology Update- Update -

Proprietary Slides-Proprietary July 31 -August Slides-July 1, 2002", FLN-2002-015,

-August 1,2002", FLN-2002-015, October.31, October.31, 2002.

7. Letter, Jens G. Munthe Andersen Andersen (GNF-A)

(GNF-A) to US. U.S. Nuclear Nuclear Regulatory Regulatory Commission Document Control Desk with attention to Alan Wang (NRC), "GEXL Correlation for "GEXL Correlation IOXI0 lOX 10 Fuel",

Fuel", FLN-2003-005, FLN-2003-005, May 31, 31, 2003.

8. Letter, Andrew A. Lingenfelter Lingenfelter (GNF-A)

(GNF-A) to US. U.S. Nuclear Nuclear Regulatory Regulatory Commission Document Control Desk with cc to MC Honcharik Document Honcharik (NRC), "Removal "Removal of Penalty Being Applied to GE14 GEl4 Critical Critical Power Correlation for Outlet Outlet Peaked Axial Power Shapes",

Power Shapes",

FLN-2007-03 FLN-2007-031, 1, September September 18,2007.

9. Letter, Andrew A. Lingenfelter Lingenfelter (GNF-A)

(GNF-A) to U.S. Nuclear Regulatory Regulatory Commission Commission Document Document Control Desk with cc to MC Honcharik Honcharik (NRC), "GNF2 "GNF2 Advantage Advantage Generic Generic Compliance with Compliance with NEDE-24011-P-A (GESTAR n), NEDC-33270P, Revision June NEDE-2401 1-P-A (GESTAR I1), NEDC-33270P, Revision 2, June 2009 2009 and and GEXL Correlation for GEXL Correlation for GNF2 Fuel, NEDC-33292P, GNF2 Fuel, NEDC-33292P, Revision Revision 3, 3~ June June 2009",

2009",

MFN 09-436, June MFN June 30, 2009.

10. Letter, Richard n. Ennis (NRC)

Richard B. (NRC) to Michael Michael Kansler (Entergy Nuclear Nuclear Operations, Operations~ Inc.),

Inc.)~

"Vermont Yankee Nuclear Power Station - Issuance of Amendment Re:

"Vennont Yankee Nuclear Power Station - Issuance of Amendment Re: Extended Power Extended Uprate (TAC No.No. MC0761)"m MC0761)"m March 2, 2006.

References References RPage 9 of 23 P~e90f23

GNP NON~PROPRlJElj'k\lRYllNFORM&1ITONi GNF NON-PROPRIETARY INFORMATION Class t CFassE GN*F AtJtaenm:ent GNP' Attachment F, nF

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[flF [flD L L On El 2 I EF:- j I

1 3 5 71 9 11 13 15 17 19 21 23 2S 25 27 29 31 33 3S 35 31 37 39 'II 11 '\3 13 FUEl FUEL TYPE AA= = 6NF2-PI00628'103-1'l66.0-100T2-1S0-T6-32S9 6NF2-PI00628iO3-IG6.0-10OT2-150-T6-3259 H := 6EI'l-PIODNAB'l21-16GZ-IOOT-ISO-T6-308'l 6EIi-PIODNABi21-160Z-IOOT-150-T6-308i 8B == GNF2-PIOOG2B'lO'l-I'lGZ-IOOT2-1S0-fS-3260 6NF2-PIOD628Oi-IAGZ-1OOT2-150-T6-3260 II = 6NF2-PI0OG28iO3-1166.O-1OOT2-15O-T6-3261 z 6NF2-PIOOG2B'103-1166.0-IOOT2-1S0-T6-3261 C= = GNF2-PIODG28387-1SGZ-I00T2-1S0-T6-2977-LUA GNF2-PIODG28387-!SGZ-10OT2-1SO-T6-2977-LUA J =

J = GNF2-PtOD62B404-i9GI-IOOT2-150-TS-3262 GNF2-PIOD$2840-1SGZ-IOOT2-1SO-T$-3262 D == 6El'l-PlOONAB'l22-i'lGZ-i001-!50-T6-296S D 6EIi-PIOONABa22-IiGZ-1001-1SO-T6-2965 K := 6El'l-PlOONAB388-1566.0-100T-lSO-TS-308S 6EIi-PIOONA8388-1566.,-IOOT-150-l6-3086 E = GEI4-PIOONA8383-116S.0-!OOT-lSO-T6-2865 GE1I-PlO1A8383-176.0-*. 0OT-150-16-2865 lL = 6EII-PIODNABi20-156Z-IOOT-1S0-T6-3085 6Ei~-PI00NAB420-16Gl-l00T-lS0-T6-308S FF = 6E14-PIOODNA38e-ISGZ-IOOT-1S0-"T-2988 G£14-PIODNAB388-15GI-I00T-ISO-T6-29S8 H = GE1I-PIOHNA9388-iCGZ-lOOT-ISO-T6-3087 M = GEl~-PIODNA8388-16GZ-100T-lSO-T6-3087 G = 6El'l-PIOONAB389-156l-!OOT-150-T6-2969 GEIi-PIONA8388-156Z-IOOT-150-Ts-2959

1. Current Cycle Core Loading Diagram Figure i.Current References References Page Pa,ge 10 of23of 23

GNF NON~PROPRIB1f;,A)RY NON-PROPRIETARYW IFORMAION!

llNiFORMAlfION CEass tI Class, GNlF GN* A1!fadlm:ent Attachment, 44 I[LD!` [BE]'

El 42 42 El END,, EfEl Ej Tj lný 40 40 [EL] [EK] ES I' ED[AD'[FEC2 [EH] (EA] ý H [HBj B K L E-ITI-9 t N M -F[D Mj-PID BF0, E E 38 38 Leim IND U0 F1 36 36 J H FGJ PA EDEGDEGIEDII I EDE(] Sm FG JEH ] [,Dt j "j ýL, L EA 34 34 El [E] FioI:Fq, AL-jL Ot EITD EMS o

B E (DI nN [AE]F20]

32 Eill IEI Ip ILE21P[D FA El Q [AE] F202J]I[oH [EN]II[E] E [H]

LI 101LB 30 19 [Ell D 00SF2GI Lý TAO, rE ElpoEl F211D !10 101E] ID[9

[AD FWI [HE] H G A EO]

28 ll IEj,-Un ElH N Lhj EA ] pEO 01Lj ýjIUjLhjF1EIF21E1 r7,

[9 Li Lj El F20 EM IEI [EIIE WiM [q 26 ELREI El El

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LEM F21 Lý+JýLj [ H ]I [HE] [0E]j[AE] [OE] [GD [MH]j[H] [ED r-B-1 M F2-] r[g 0=[E-]

22 (DBI (E] G 0 A 0 El[5 M C C F+/-m]l [E] (7D 7[D A eJG LI [ 09

[ME] Bm El A M G [EE] 0 (GqLie EI] A EIIE 20 20 011 IEI ILUDIE1019 L E 110[EZG;] [AE] 21 E

18 [EDI [HH] A 0] MEHHea Li G A 10 I An 0 H [Ep [D 16 [BE] [EE] [AE] F20 ] "GF20] [EE] [!OEI [OE] [ED [OD [GE] [OD [ADEI] EE ] [BE] [CE]

19 LULWEEIL, Eýjl E I [H] [H] [7]

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4 SH II(E] [E]II[KE] [flEILEH 2 [DIEL] ((E]IRB]

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 Fuel Type Fuel Type A=GE14-FPIODNAB422-16G7-IOOT-150-T6-2862 AcGEI4*P IODNAB422* I 6G7... I 001'-1 SG-T6*2862 (Cycle 2.)25,) l=G' 14-P IODNAB42 1-l6GZ-!00T-1 50-T6-3084 I=GI~14*PIODNAB421*16GZ*IOOT*ISO*T6*3084 (Cycle (Cycle 27) 27)

B=GE 14-PI ODNAB3S3-14G6.0-IOOT- 150-T6-2864 (Cycle B=GEI4-PIODNAB383-14G6.G-IOO1'-ISO-1'6-2864 (Cyclc2S) 25) J=GE14-PIODNAB3g3-14G6.0-IOOT-lSO-T6-2864 J=GE 14*P IODNAB383-14G6.0-100T-ISO-1'6-2&64 (Cycle 25)

(C~'clc25)

C=OGI'4-PIOZ)NAB383-13G6.0-tOOT-150-T6-2863 C=GBI4-PIOI)NAB383-13G6.o-IOO1'-150-T6-2863 (Cycle (Cycle 25) K=GEI14-PIODNA13383-13G6.0-100T-150-T6-2863 K~GEI4-P\oDNAI)383-13G6.0-IOOT-150-T6-2863 (Cycle (Cycle 25)

Dt=NI.F2-PiODG2B387-15G%-OOT2-t SO-T6-2977-I.UA

():.GNF2-PIODG2B387-15GZ-100T2-1 50-T6-2977-LUA (Cyclc(Cycle I..==E t4-Plt0DNA13383-17G6.0-100T1-t50-T6-2865 L-GE 14-1'1 OONAB383-17Q6.O-JOOT-1 50-1'6-2865 (Cycle (Cyclc 25) 25)

26) 14-P I ODNAB388-M=GE 14-1'  ! 5G6.0-lO00T-150-1'6-3086 ODNAB388-15G6.0-1 00,.-150*,.6*3086 (cycle 27)

(Cyclc27)

E=GEI4-PiOt)NAB422-14GZ-100T-Il50-T6-2965 E=GEI4-P1ODNAB422-14G7.... 100T-150-1'6-2965 (Cycle (Cycle 26)26) N=GE14-PIODNAB420-16GZ,100.lT-150-46-3085 N=GE14*PI0I)NAB420*16GZ-IOOT-ISO-T6-3085 (Cycle (Cyclc 27) 27)

F=GE 14-PIOI)NA13383-1706.O-i0OT- t 50-T6-2865 (Cycle FcGE 14*PIOI)NA13383-17G6,o-IOOT-ISO-T6-2865 (Cycle 25)25) O=GE 14-1 ! 0D)NAB388- i6GZ- 100T-I 50-T6-3087 O=GEI4-PIODNAB388-16GZ-1OOT*.50-T6-3087 (Cycle (Cycle 27) 27)

G=GE 14-P IODNAB388- MSGZ-I OOT-150-T6-2968 G=GEI4-PIODNAB388-15GZ-1OO1'-ISO-1'6-2968 (Cycle (Cycle 26) li=GE li==GE 14*1'1 O0DNAB388-15GZI 4-Pl O])NAB388-1 D100T-I 50-T6-2969 507... 1001--150-1'6*2969 (Cycle 26)

(Cycle Figure 2. Previous Cycle Core Loading Figure2. Loading DiagramDiagram

2. Previous 'Cyde Figure 2.1Previolls Cycle Oore Core Loading Diagram lP.~ge I111I of 23 Page

., ~,

GNFNON~PROPR:lEli~Y GNF NON-PROPRIETARY JlNiFCDR:lVfiA1ITCDN INFORMATION, C~ass; E Class, I GNF, Attachment GNF A1it!aenmeRt:

lIE 1311]

Figure 3. Figure 4.1 from NEDC-32601-P-A NEDC-32601-P-A Figure 3. Figure 4-1 4_1 from NEDC-32601-P-A .Page Page 12 of 23

GNFNON:"PROPRffilfPffi:Y GNF NON-PROPRIETARY llNlFORMAlITON!

NFORMAT*ION Ctass'[

Class [

GNF AttacImtent GNlF Attachment

[Ii 13)))

Figure 4. Figure IlI.S-l 111.5-1 from NEDC-32601P-A NEDC-32601P-A Figure 4. Figure 1115-1 RL5-1 from NEDC-32601P-A NBDC-32601P-A P4ge of23 Page 13 of 23

GNFNON-PROPR:lEIr~Y GNF NON'-PROPRIETARY nNJFORMAlITONf NFORNATIONI CFass Class LI GNF' GNP' Attachment At!t!ad!tmetLt.

nn t3)))

Figure 5. Figure 111.5-2 111.5-2 from NEDC-32601P-A NEDC-32601P-A Figure 5. Figure m.S-2 from NBDC-32601P-A M1.5-2 mom NEDC-32601P-A Page 14 of23 of 23

GNF GNF NON-PROPRIETARY NON-PROPRIETARY INFORMATION INFORMATION Class I GNF Attachment Attachment Table Table 1. Description Description of Core Previous Previous Cycle Previous Previous Cycle Cycle Rated Rated Current Current Cycle Cycle Current Current Cycle Cycle Rated Description Description Minimum Core Flow Minimum Core Flow Limiting Limiting Minimum Core Flow Minimum Flow Core Flow Flow Limiting Limiting Limiting Limiting Case Case Case Limiting Limiting Case Case Case Number of Bundles Number Bundles in the 368 368 368 368 368 368 Core Limiting Limiting Cycle Exposure Point (ie, Point (Le. N/A EOC N/A N/A , EOC O C/MOC/E BOC/MOCIEOC)

B OC) . . . .... ..........................

Cycle Cycle Exposure Exposure at Limiting Point N/A 10600 10600 N/A '10600 l0600 (MWdlSTU)

(MWd/STU) ... ..

d_", .* _~_ ,,_,,_

% Rated Core Flow N/A N/A 100 100 N/A N/A' 100 100

.~ .." .. -- . -.. --,- ._,.- -

Reload Fuel Type GE14 GE14 GNF2 GNF2 Latest Reload Batch 32.6 31.5 32.6 31,5 Fraction, %

Latest Reload Average Average Batch Weight % 4.01 4.04 Enrichment Enrichment Core Fuel Fraction:

GEl4 GE14 0.989 0.674 GNF2 0.011 0.326 0.326 Average Weight %

Core Average 3.99 4.01 3.99 4.01 Enrichment Enrichment Table 1. 1. Description of Core Page 15 of 23

GNF NON-PROPRIETARY GNF NON-PROPRIETARY INFORMATION INFORMATION Class I GNF Attachment GNF Attachment Table Table 2.

2. SLMCPR SLMCPR Calculation Calculation Methodologies Methodologies

.. - .~

Previous Cycle Cycle Previous Previous Cycle Rated Rated Current Current Cycle Cycle Current Curr~nt Cycle Cycle Rated Description Description Minimum Core Minimum Core Flow Limiting Core Flow Limiting Minimum Core Flow Minimum Flow Core Flow Limiting Core Flow Limiting Limiting Case Case Limiting Case Case Limiting Case Case Limiting Case Case Non-power Distribution Non-power Distribution NEDC-32601-P-A NEDC-32601-P-A U e. ai ........

Uncertainty__y ..... NEDC-32601-P-A NEDC-32601-P-A UncertaiI!ty _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Distribution Power Distribution NEDC-32601-P-A NEDC-32601-P-A NEDC-32601-P-A NEDC-32601-P-A Methodology Methodology NEDC...2601.-P.A .. - -

Distribution Power Distribution NEDC-32694-P-A NEDC-32694-P-A NEDC-32694-P-A NEDC-32694-P-A Uncertainty ......

Uncertainty __ED _-32694-P-ANEDC-32694-__A " "-'",,-,. ,-_.""",,- -,,-~

Core Monitoring System 3D 3D Monicore Monicore 3D 3D Monicore Monicore

--~ - - -.- --

Table 2. SLMCPR Calculation Methodologies Calculation Methodologies Page page 10 16 Qf2~ of 23

GNF NON-PROPRIETARY GNF NON-PROPRIETARY INFORMATION INFORMAnON Class I GNF Attachment Attachment Table 3.

3. Monte Monte Carlo Carlo Calculated Calculated SLMCPRSLMCPR vs. Estimate Previous Previous Cycle Previous Cycle Cycle Rated Current Current Cycle Current Current Cycle Cycle Rated Description Description Minimum Minimum Core Flow Flow Core Flow Limiting Limiting Minimum Core Core Flow Flow Core Core Flow Limiting Limiting

[I

((

"" - Limiting Case Limiting Case Case Limiting Case Limiting

__________________ __________________[___________________ __________________

Case Case Case

\

I + I t

___________________ I .1. __________________ 1 __________________ 1 vs. Estimate Table 3. Monte Carlo Calculated SLMCPR VS. Vaýe 17 of 23

NON-PROPRIETARY INFORMATION GNF NON-PROPRIETARY INFORMATION Class I Attachment GNF Attachment Table 3. Monte Carlo Calculated Calculated SLMCPR vs. Estimate

" " .. ~

Previous Cycle Previous Previous Cycle Rated Rated Current Cycle Current Cycle Rated Description Description Minimum Minimum Core Flow Core Flow Limiting Minimum Core Flow Core Flow Limiting Limiting Limiting Limiting Case Case Limiting Case Case Case I 4. J

--,--~.~-.-,,~,-,

.~

(J}ll "Il Table 3.

3. Monte Carlo Calculated SLMCPR vs.

VS. Estimate . P.

Valge, 1$ of,23

GNF NON-PROPRIETARY NON-PROPRIETARY INFORMA INFORMATIONnON Class I GNF Attachment Table 4. Non-Power Non-Power Distribution Uncertainties Nominal (NRC- Previous Cycle Previous Cycle Current Cycle 1 Current Cycle Cycle Approved) Value Minimum Core Rated Core Flow Minimum Core Rated Core Flow

+/- (%)

++/-cr (0/0) Flow Limiting Case Limiting Case Flow Limiting Case Limiting Case GETAB GETAB Feedwater Feedwater F Flow eedw tFlow 1.76 N/A N/A N/A N/A Measurement__________ 1.76 N/A __________ N/A __________ N/A _____ N/A _____

Measurement Peedwater Feedwater Temperature Temperature 0.76 N/A N/A N/A N/A Measurement Measurement Reactor Reactor Mea Pressure Pressure sure 0.50 0.50 N/A N/A N/A N/A N/A N/A Measurement Measurement ,

Core Inlet Temperature 0.20 N/A N/A N/A N/A Measurement Measurement -,., -""""--

w _ _ '" ~ __" ___

- ~-,

Total Core Flow 6.0 SLO / 2.5 TLO N/A N/A N/A N/A N/A N/A Measurement 6.0 SLO I 2.5 TLO N/A N/A Measurement Channel Flow Area Area 3.0 N/A N/A N/A N/A Variation 3.0 N/A N/A - N/A N/A Friction Factor 10.0 N/A N/A N/A N/A Multiplier 10.0 N/A N/A N/A N/A -

Channel Channel Friction 5.0 5.0 N/A N/A N/A N/A N/A N/A N/A N/A Factor Multiplier 5.0.N/.N/A./A.N/

Non-Power Distribution Uncertainties Table 4. Non-Power Page 19 of Page, of23 23

GNF GNF NON-PROPRIETARY NON-PROPRIETARY INFORMATION INFORMAnON Class Class I .

GNF GNF Attachment Attachment Table Table 4. Non-Power Non-Power Distribution Distribution Uncertainties Uncertainties Nominal Nominal (NRC- (NRC- Previous Previous Cycle Cycle Previous Previous Cycle Cycle Current Current Cycle Cycle Current Currel.lt Cycle Cyde Approved)

Approved) Value Value Minimum Minim urn Core Core Rated Rated Core Core Flow Flow . Minimum Minimum Core Core Rated Ra,ted Core Core Flow Flow a (%)

+/- CJ (%) Flow Limiting Case Flow Limiting Case Limiting Limiting CaseCase Flow Limiting Flow Limiting Case Case Limiting Limiting Ca,se Case NEDC-32601-P-A NEDC-32601-P-A 3 3 Feedwater Feedwater Flow Flow ((3})) j

{3 I)) {3})) (( {31)) (( P}J] )

Measurement Measurement

(( (( (( (( ([

Feedwater Feedwater Temperature Temperature (((( {3}))

{3})) (((( {31))

{3))) (((( {3}))

{3,)) (((( {J}))

13))) (((( {3}))

131))

Measurement Measurement Reactor Reactor Pressure Pressure ]3}))

{3})) PI)) ((1]{3}]1 Measurement Measurement

(( {3}))

((_[_____((_3}]__} (( {31)) (( (( _

(( [__ _ _

-"'_'-.". " '~~.--

Core Core Inlet Inlet Temperature Temperature 0.2 0.2 N/A N/A 0.2 0.2 N/A N/A 00.2 2 M e a su r e m e n t Measurement ___ _ ............. .. . .....

---.~- ,-, ~

Total Total Core Core FlowFlow 6.0 SLO / 2.5 TLO N/A 6.0 SLO / 2:5 TLO N/A 6.0 SLO /2:5 TLO Measurement 6.0 SLO/2.5 TLO N/A 6.0 SLO 12:5 TLO N/A 6.Q 5LO 12,5 TLO Measurement Channel Channel Flow Flow Area Area 1311]

((_ _ {3}n 3E)) 131)) 0[ ]

(( {3})) (( {31)) (( {3}))

((__ {3}))

Variation Variation ((_((__3_))_(( _3_ )) ((_ })) _[__ _ _))

Friction Friction Factor Factor 3,)) 13[]

{3})) {3})) {3 1))

(( 01))

M ultiplier Multiplier

(( {3})) (( (( (( ([ {3}JJ Channel Channel Friction Friction 5.0 N/A 5.0 N/A Factor Multiplier 5.0 N/A 5.0 N/A 5,0 Factor Multiplier ... *** _ __ m **** _

Table Table 4. Non-Power Non-Power Distribution Distribution Uncertainties Uncertainties Page, 20 of 23

NON-PROPRIETARY INFORMATION GNF NON-PROPRIETARY INFORMATION Class I GNF Attachment Table 5. Power Distribution Distribution Uncertainties

.. ~~ ~

Nominal Nominal (NRC- Previous Cycle Previous Cycle Current Cycle Current Cycle, Current Cycl~

Description Description Approved) Value Minimum Minim urn Core Rated Core Flow Minimum Core Rated Rated Core Flow mow

+ a (%)

tG(%) Flow Limiting Case Limiting Case Case Flow Limiting Case Limiting Case GETAB/NEDC-32601-P-A GETABINEDC-32601-P-A GEXL R-Factor R-Factor (( {3}))

{3})) N/A N/A N/A N/A Random Effective Effective 2,85 SLO/1.2 TLO N/A N/A N/A N/A N/A N/A N/A N/A 2.85 SLO/1.2 TLO TIP Reading Reading _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _________

Systematic Effective Systematic Effective 8.6 N/A N/A N/A N/A 8.6 N/A N/A N/A N/A TIP Reading "-.,,. -" ... "._... "."."-----,,---,, " .----..

NEDC-32694~P-A, NEDC-32694-P-A, 3DMONICORE3DMONICORE GEXL R-Factor (( {3}))

(3)))

{3})) {}][

{3})) {3}J]

3)]j GEXL R-F actor (( (( (( (( 1[{}][

(([ 1,]

{3}JJ

~-. . -

Random Effective Random Effective 2.85 SLO/1.2 TLO N/A 2.85 SLO/1.2 TLO N/A 2,85 SLO/l 2 TLO 2.85 SLO/1.2 TLO N/A 2.85 SLO/l.2 TLO N/A 2.85 SLO/L2 1'1,0 TIP Reading TIP Integral (( {3}))

131] (( {3 1)) ((

(( {3 1))jI]

133)) j3})) (( {31)) (( {~}))

i-]

.-->-.--.~--.- ..-

Four Bundle Power Distribution (3}]) {3 I )) {3}J]

E(([

(( (( (( m]J

[r((

{3}))

Surrounding Surrounding TIP (( 3 (( {3))) 13})) 131)) (( 13)))

Location Location Contribution to Bundle Power {Jl)) {3 1)) {31 n {3}))

Uncertainty Due to Uncertainty

(( (( (( (( (( {31))

LPRMUpdate LPkM Update ........

Table 5. Power Distribution Uncertainties Table 5. Page 21 of page of2J 23

GNF NON-PROPRIETARY GNF NON-PROPRIETARY INFORMATION INFORMATION Class I

• GNF Attachment Attachment Table 5. Power Table 5. Distribution Uncertainties Power Distribution Uncertainties

<T'~ ___ ** _ . _ . _ . ___

• _._

.~--. _.-----"

Nominal (NRC-Nominal (NRC- Previous Cycle Previous Cycle Previous Cycle Previous Current Cycle Current Current Current Cycle Cyde Description Description Approved)

Approved) Value Value Minimum Core Minimum Core Rated Core Core Flow Minimum Core Minimum Core R~ted Core Flow Rated Core FIQw

+/- a(J (%)

(%) Flow Limiting Flow Limiting Case Case Limiting Case Limiting Case Flow Limiting Case Flow Limiting Case Limiting Case Limiting C~se m """"n "m_ ,

Contribution to Contribution

{3 1)) {3 1)) (3})],))]

Bundle Power Bundle Power Due to (((( (( {31))

{3}] ((

(( Er(( 1{31)) ((

(( '*']

0]1 failed Failed TIP Contribution to Contribution to Bundle Power Due to Bundle (([" {3})) Er(( PI))

3TiI (((( {3})) Er(( {3}])

01)) Er(( {31]

03 1))

Failed LPRM LPRM Uncertainty in Total Uncertainty -

Calculated Bundle Calculated Bundle (( {3 1))

{3} ]3}] ((Er {3 1)) Er(( {]i

{3 1))

131)) (( {31))

{3})) (( {3 t))

Power

- ,-.--~

Uncertainty of TIP Uncertainty TIP Signal Nodal ((

(( {3})) ((Er {3 I ))

{31]i (( {3}))

03}1]

{3}] ((E[ m]J (31] ((E[ 131))lJ]

Uncertainty Uncertainty d.N. _. -

Ta15le Table 5. Power Distribution Uncertainties Page, 22 of 23

GNP NON-PROPRIETARY GNF NON-PROPRIETARY INFORMATION INPORMATION Class Class I GNF GNP Attachment Attachment Table Table 6.

6. Critical Critical Power Power Uncertainties Uncertainties

. -.... ,,-~

~ ..-- - ,--.~- ---~----<~--,--

Nominal Previous Cycle Previous Previous Cycle Previous Current Current Cycle Cycle Current Current Cycle Cyde Nominal Value Value Description Minimum Core Rated Core Rated Core Flow Minimum Core Minimum Core Rated Core Rated Core Flow FI()w Description

+/- (Ja (%)

Value Minimum Flow Limiting Case Flow Limiting Case Limiting Case Limiting Case Flow Limiting Case Flow Limiting Case Limiting-Case LimitingXase --" '-.--.- .. ---~-.-.-.---~-~-

((

((J Table 6. Critical Power Uncertainties Uncertainties Page 23 of of23 23