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NEDO-33186, Revision 1, MELLLA Tracg Divom Evaluation for Hope Creek at Cppu Conditions.
ML053180376
Person / Time
Site: Hope Creek PSEG icon.png
Issue date: 04/30/2005
From: Tuttle J, Yang A
General Electric Co
To:
Office of Nuclear Reactor Regulation
References
DRF 0000-0031-7838, LCR H05-01, LR-N05-0329 NEDO-33186, Rev 1
Download: ML053180376 (53)
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Attachment 8 LR-N05-0329 LCR H05-01 NEDO-33186, Revision I MELLLA TRACG DIVOM Evaluation for Hope Creek at CPPU Conditions

GE Energy, Nuclear 3901 Castle Hayne Road NEDO-33186 Wilmington, NC 28401 Revision 1 DRF 0000-0031-7838 Class I April 2005 MELLLA TRACG DIVOM Evaluation for Hope Creek at jCPPU Conditions Prepared by: A.IYang Approved by:

Ge Ele'Project Manager G emer Electric Company

NEDO-33186, Revision I General Electric Company Non Proprietary Notice This is a non-proprietary version of the document NEDO-33186, Revision 1, which has the proprietary information removed. Portions of the document that have been removed are indicated by an open and closed bracket as shown here (( )).

Disclaimer The only undertakings of the General Electric Company (GE) respecting information in this document are contained in the contract between the company receiving this document and GE.

Nothing contained in this document shall be construed as changing the applicable contract. The use of this information by anyone other than a customer authorized by GE to have this document, or for any purpose other than that for which it is intended, is not authorized. With respect to any unauthorized use, GE makes no representation or warranty, and assumes no liability as to the complctcncss, accuracy or usefulness of the information contained in this document, or that its use may not infringe privately owned rights.

ii

NEDO-33186, Revision I General Electric Company TABLE OF CONTENTS ACRONYMS AND ABBREVIATIONS ........................... iv 1.0 Scope and Summary ........................... 1 2.0 Introduction ........................... 2 3.0 Bases & Assumptions ........................... 3 3.1 Plant Reference Conditions ........................... 5 4.0 DIVOM Methodology ........................... 6 4.1 Channel Grouping ........................... 7 4.2 Computer Codes ........................... 9 5.0 Results and Discussion ........................... 10 5.1 PANACEA Subcriticality Results ........................... 10 5.2 CRNC Channel Grouping.................................................................................................14 5.3 TRACG Steady-State Analysis ........................... 20 5.4 TRACG Transient Analysis ........................... 21 5.5 Composite DIVOM Curve ........................ 31 5.6 Sensitivity Study Analysis................................................................................................37 6.0 Conclusions ...................... 46 7.0 References ...................... 47 iii

T i NEDO-33186, Revision I Gcneral Elctric Company ACRONYMS AND ABBREVIATIONS Item ':Shor F-orm D'-.esceiption I BOC Beginning Of Cycle 2 BWROG Boiling Water Reactor Owners' Group 3 CLTP Current Licensed Thermal Power 4 CPPU Constant Pressure Power Uprate 5 CPR Critical Power Ratio 6 DIVOM Delta CPR Over Initial MCPR Versus Oscillation Magnitude 7 EOC End Of Cycle 8 EPU Extended Power Uprate 9 GE General Electric 10 GENE General Electric Nuclear Energy 11 GNF Global Nuclear Fuels 12 HCOM Hot Channel Oscillation Magnitude 13 ICPR Initial Critical Power Ratio 14 LPRM Local Power Range Monitor 15 MCAR Mixed Core Analysis Report 16 MCPR Minimum Critical PowerRatio 17 MELLLA Maximum Extended Load Line Limit Analysis 18 MOC Middle Of Cycle 19 MWt Megawatt Thermal 20 OLMCPR Operating Limit Minimum Critical Power Ratio 21 OM Oscillation Magnitude 22 OPRM Oscillation Power Range Monitor 23 R.PF Radial Peaking Factor 24 SLMCPR Safety Limit Minimum Critical Power Ratio 25 2RPT Two Recirculation Pump Trip 26 TLO Two Loop Operation iv

NEDO-33 186, Revision I General Electric Company REVISIONS Revision 1:

1. Clarify the channel grouping for the peripheral channel 19 in Section 4.1.

V

NEDO-33186, Revision I General Electric Company 1.0 Scope and Summary The purpose of this analysis is to determine the relationship between the Critical Power Ratio (CPR) and Hot Channel Oscillation Magnitude (HCOM) of a mixed core of SVEA96+ and GE14 fuel at a Constant Pressure Power Uprate (CPPU) condition of 115% of the Current Licensed Thermal Power (CLTP) with operation in the Maximum Extended Load Line Limit Analysis (MELLLA)' domain and no change in the normal maximum operating pressure. The evaluation was performed for a Hope Creek core containing 348 SVEA96+ fuel assemblies and 416 GE14 fuel assemblies. The quantity of each fuel type may vary in the actual Cycle 14 core. The resulting curve defined as the Delta CPR over Initial MCPR Versus the Oscillation Magnitude (DIVOM) provides the basis for Option IlI Oscillation Power Range Monitor (OPRM) setpoints to protect the plant Safety Limit Critical Power Ratio (SLMCPR).

The base case stability analysis was performed for the power/flow state point, corresponding to a post two-pump trip condition at 33.7% rated core flow along the highest licensed rod line (Maximum Extended Load Line Limit Analysis, MELLLA rod line). Three different exposure conditions were considered: beginning of cycle (BOC),

middle of cycle (MOC) and end of cycle (EOC). The NRC-approved licensing methodology as documented in Reference 1 was used in this study, supplemented by the BWROG DIVOM Procedure Guideline.

The PANACEA computer program, a three-dimensional BWR core simulator, was used to obtain three-dimensional power distribution, subcriticality and harmonic contours. The harmonic contours were utilized by the CRNC computer code to perform the channel grouping for the stability analysis. The CRNC groupings were incorporated into the TRACG basedecks and the three-dimensional TRACO computer code was used to simulate the transient. Plant-specific TRACG basedecks, which reflected Hope Creek Cycle 14 core loading (348 bundles of SVEA96+ and 416 bundles of GE14) were developed. The ANALYZE computer code was used to extract the Hot Channel Oscillation Magnitude (HCOM) and the delta CPR over initial CPR (ACPRIICPR) for the limiting bundles in the TRACG analysis.

For this application the TRACG04/PANACll codes were used in establishing the DIVOM curves. ((

))

'The MELLLA boundary line in the power/flow map represents a gencrically developed load line for Hope Crek. Tic actual plant operating load linc is expected to vary through tlc cyclc and from cycle to cycle and may not follow this MELLLA boundary line.

1

I

- -. NEDO-33 186. Revision 1 General Electric Company 2.0 Introduction The SLMCPR protection calculations for long-term stability solution Option III rely on the DIVOM curve as established in Reference 1. The TRACG stability analyses have been used to establish this relationship between the HlCOM and the fractional change in CPR, which is fairly linear. The DIVOM curve represents the thermal-hydraulic responsiveness of the fuel to a given oscillation magnitude. Thus, a steeper curve is more adverse than a flatter curve. A generic curve was established in Reference l, with an attempt to develop a reasonably bounding slope for all fuel types and operating conditions at that time.

Subsequent TRACG evaluations by GE have shown that the generic DIVOM curves, specified in Reference 1, may not be conservative for more current plant fuel and core design and operating conditions. Specifically, a non-conservative deficiency has been identified for high peak bundle power-to-flow ratios. This deficiency may result in a non-conservative DIVOM relative to the generic regional mode DIVOM slope, resulting in a non-conservative Option III trip setpoint. The original generic analysis of Reference 1 was based on a nominal core design with a lower fuel enrichment and for pre-Extended Power Uprate. The generic analysis cycle length was generally shorter.

GE made a Part 21 Notification (Reference 2) that identified the DIVOM deficiency.

Subsequently, the BWROG has developed a guideline for calculating a plant specific DIVOM to address the issue. The guideline provides instructions on calculating a regional mode DIVOM curve, which address the important parameters (e.g., cycle exposure, power/flow conditions, feedwater temperature, radial peaking, xenon concentration, etc.) on a plant-specific basis.

The plant-specific DIVOM curves in this report have been calculated in accordance with the BWROG DIVOM Procedure Guideline. The calculated DIVOM curve reflects the core/fuel designs and plant operating strategy for Hope Creek Cycle 14.

For Option III, the DIVOM curve is used to define an OPRM setpoint to protect the SIMCPR during an anticipated instability event. A steeper DIVOM curve may require a lower OPRM setpoint.

2

NEDO-33186, Revision I General Electric Compam 3.0 Bases & Assumptions The Hope Creek Cycle 14 core contains both SVEA96+ and GEI4 fuels.

The TRACG DIVOM calculations were performed based on specified operating conditions for Hope Creek Cycle 14. Three conditions at different exposure level were considered:

1) BOC (Cycle Exposure =0 MWD/ST),
2) MOC (Cycle Exposure 7500 MWD/ST), and
3) EOC (Cycle Exposure = 12000 MWD/ST).

The choice of three exposure points follows the BWROG DIVOM guideline. ((

))

This analysis is a Hope Creek-specific evaluation to establish a cycle-specific DIVOM value based on Cycle 14 core loading.

The base case stability analysis was performed at the power/flow state point corresponding to a post two-pump trip condition at 33.7% rated core flow along the highest licensed rod line. Once the limiting exposure is identified, two additional sensitivity cases are run at that exposure. One is a flow sensitivity in which post two-pump trip condition is set to 38.7% of rated core flow along the highest licensed rod line.

This analysis is used to identify any DIVOM curve sensitivity to core flow. The second is a radial peaking sensitivity in which the radial peaking factor is increased by 5% and 10% on the limiting channel. This analysis is used to represent expected variations in radial peaking factor as the result of normal plant operation.

The design inputs to these calculations are modeled in:

  • The1lope Creek Cycle 14 TRACGbasedecek,
  • The Hope Creek Cycle 14 PANACI I wrap-ups corresponding to three different cycle exposure points at rated power/flow conditions, and
  • The Hope Creek Cycle 14 ISCOR basedeck.

The following TRACG bases/assumptions are used in this analysis and reflected in the TRACG basedecks:

  • ((

3

NEDO-33186, Revision I General Electric Company 1]

  • Consistent with the standard stability TRACG methodology, ((

))

. The core is loaded with SVEA96+ and GE14 fuels according to Hope Creek Cycle 14 core loading.

The TRACG model incorporates twenty-six channel groups, including six individual bundles chosen as limiting hot channels. This is adequate for a regional stability analysis.

1]

  • Thc fccdwater cnthalpy is dcfincd as steady statc fbedwater cnthalpy at the post two recirculation pump trip (2RPT) power and flow conditions. The feedwater enthalpy was obtained from the ISCOR steady-state analysis case.

4

NEDO-33186, Revision I Gencral Electric Company 3.1 Plant Reference Conditions The Reference Conditions are defined by the reactor power and flow operating domain and further defined by the following:

  • The core load for Hope Creek Cycle 14 is composed of SVEA96+ and GE14.
  • The rated thermal power level, under normal plant operating conditions, is 3840 MWt, at which Hope Creek is licensed to operate the plant.

M The rated core flow is 100.0 Mlbm/hr.

  • The reactor dome pressure under normal plant operating conditions iR1020 psia.

The upper boundary of the reactor two loop operation (TLO) operating domain, at which Hope Creek is licensed to operate the plant. This corresponds to the MELLLA boundary for Hope Creek, with an upper intercept at 100% rated core power and 94.8% rated core flow.

  • Nominal radial peaking factor and nominal rod patterns as defined in the standard reload rod patterns for normal plant operation.

5

NEDO-33186, Revision 1 Gcneral Elcctric Company 4.0 DIVOM Methodology The NRC-approved licensing methodology as documented in Reference I was used in this analysis, supplemented by the DIVOM Procedure Guideline developed by the BWROG Detect and Suppress Committee.

All analyses have been performed utilizing the plant power and flow conditions and event scenarios reflecting reasonably limiting operations and the plant reference conditions.

The power/flow conditions for the base case represent a two-pump trip along the highest licensed rod line to the natural circulation line.

The PANACEA, CRNC, TRACG and ANALYZE calculations have been performed to evaluate the DIVOM curves for three cycle exposure conditions for Hope Creek Cycle

14. PANACEA calculations were performed to obtain three-dimensional power distribution, subcriticality and harmonic contour at 33.7% rated core flow. CRNC calculations were performed to obtain proper regional channel grouping. TRACG steady-state analyses-were performed to achieve steady-state conditions at 33.7% core flow.

TRACG transient analyses were performed to simulate the instability event. ANALYZE calculations were performed to extract the HCOM and ACPR/ICPR.

The TRACG analysis includes these steps:

Step 1. Steady-state plant conditions are obtained at prescribed power/flow/exposure points. This step is performed by utilizing TRACG implicit mode, which results in a stable solution.

Step 2. Channel thermal-hydraulic information is extracted from the steady-state conditions (TRACG dump file generated at the end of the steady state run). ((

))

Step 3. ((

))

TRACG graphics information is retrieved with GRIT computer code and analyzed with the ANALYZE computer code to determine the relationship between ACPR/ICPR and the oscillation magnitude.

6

NEDO-33 186 Revision I Gcncral Electric Company 4.1 Channel Grouping The CRNC channel grouping is based on.radial peaking factor (RPF) and relative first power harmonics. The RPF and harmonic data are obtained from the PANACEA analyses. CRNC channel grouping for the BOC case is illustrated in Figure 4.1 (19 channel groups with the peripheral channel group 19 split in two groups of 20 and 30 shown on Figure 5.4 makes for a total of 20 channel groups).

Next, six single channels are selected for use in the DIVOM calculation. To ensure hot channels are selected, the single channel selection criteria include the highest radial peaking channel, the channel with the highest first harmonic and the highest product of radial peaking factor and first harmonic. These six channels, plus the 20 channels from the original grouping make up the 26 channels used in a TRACG analysis.

Figure 4.1 depicts the typical BOC channel grouping generated by the CRNC computer code.

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NEDO-33 186, Revision 1 General Elcctric Company 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 10 10 10 10 10 8 8 8 8 8 8 8 7 7 19 19 19 10 10 15 10 15 10 15 18 18 18 8 18 8 17 7 7 19 19 19 10 6 6 6 15 6 6 10 10 10 8 8 8 17 7 7 7 7 19 19 10 6 4 4 14 6 15 6 15 10 10 18 8 18 7 17 7 7 7 7 19 19 19 15 6 14 4 14 4 4 6 15 6 15 15 8 18 8 7 7 17 9 17 9 17 19 19 19 10 614 12 12 4 4 15 15 6 6 15 15 8 8 17 17 7 9 16 16 16 9 9 19 19 10 6 4 4 12 12 14 4 15 15 15 6 15 18 8 18 17 17 9 17 16 16 5 5 9 9 19 19 10 6 4 4 12 2 14 4 14 4 6 6 6 10 8 8 7 7 7 16 9 16 5 16 5 5 9 7 19 19 6 15 4 12 2 2 4 14 4 4 4 15 10 18 18 8 17 7 9 9 16 9 5 5 13 5 16 9 19 19 6 4 14 2 2 14 15 4 2 12 14 6 10 18 18 7 7 17 16 5 9 16 16 5 5 13 5 9 19 19 614 414 415 14 4 4 14 14 6 10 18 18 7 7 17 16 5 5 16 16 5 13 5 16 9 19 19 6 4 2 414 414 4 14 4 6 6 18 8 8 17 7 9 9 16 5 16 5 13 3 3 5 5 19 19 10 14 414 2 2 4 4 4 6 6 15 10 18 18 7 17 9 9 5 3 3 3 3 13 3 16 9 19 19 614 2 412 12 12 4 15 15 18 10 18 18 17 17 7 17 16 16 3 13 11 13 3 3 16 5 19 19 615 4 414 12 14 4 15 15 18 8 18 18 17 17 9 17 16 16 3 11 11 11 3 1 13 5 19 19 10 15 414 4 4 4 4 6 10 10 18 8 17 17 9 16 5 5 3 3 3 1 1 13 3 13 9 19 19 6 6 4 4 14 6 15 6 15 10 10 8 18 7 7 17 5 5 3 13 3 13 3 13 3 1 3 5 19 19 10 15 614 615 15 6 6 15 18 8 8 17 17 9 5 13 13 3 3 13 16 3 13 3 13 5 19 19 10 614 6 615 15 10 6 15 18 8 8 17 17 9 5 13 11 1 3 16 13 1 1 13 3 5 19 19 10 15 614 6 610 15 10 10 8 18 7 17 17 9 16 3 3 3 13 3 1 1 11 316 5 19 19 8 10 6 6 15 615 10 15 8 8 8 7 7 9 5 5 5 3 13 3 13 1 11 3 3 5 9 19 19 10 10 6 615 15 18 10 18 18 17 717 16 5 16 16 16 3 13 11 11 3 3 5 9 19 10 10 10 15 15 15 10 8 1818 7 716 16 5 5 16 16 3 3 11 11 13 5 0 10 19 19 18 10 18 10 18 8 8 7 17 717 16 5 16 5 3 3 13 3 13 5 16 19 19 19 8 8 8 8 18 8 17 7 17 9 9 10 5 15 5 13 3 3 5 9 19 19 8 8 8 8 18 7 7 7 9 9 9 5 5 16 5 5 5 9 19 19 19 8 818 7 17 7 17 17 17 16 9 16 9 16 9 9 19 19 19 8 8 7 7 7 7 7 7 7 9 9 9 9 9 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 Figure 4.1 CRNC Channel Grouping (BOC) 8

NEDO-33186, Revision 1 General Electric Company 4.2 Computer Codes The following computer codes are used in this analysis:

Table 4.1 Computer Codes Used name :ode

. 't . .ersion PANACEA 11 CRNC 6 TRACG 4 GRIT 4 ANALYZE I ISCOR 9 TRACGO4, which implements the approved PANACI I kinetics, is used instead of TRACGO2 to perform the DIVOM stability analysis.

9

NEDO-33186, Revision I General Electric Company 5.0 Results and Discussion 5.1 PANACEA Subcriticality Results The PANACEA harmonic analysis results of the fundamental and azimuthal eigenvalues and core subcriticality are shown in Table 5.1. ((

))

The grouping was chosen based on the first harmonic output from PANACEA for all cases. The first harmonic plots are shown in Figures 5.1 through 5.3 for BOC, MOC, and EOC respectively.

Table 5.1 Ilope Creek Cycle 14 Ilarmonics TCvclc Fundamental 'Azlmulhal ,-Subcriticalltv :Subcriticalitvy :Subcritlcality

,ignvalue lposure (First; (ls -2nd - (3'd

_ of h.) lharm nc) harmonic eigvalue BOC 1.012115 1.005507 0.006493 0.006519 0.010308 MOC 1.012768 1.006359 0.006288 0.006277 0.008459 EOC 1.009649 1.002389 0.007173 0.007181 0.011063 10

NEDO-33186,Revision I Gcncral Electric Company RTlC14 BOC 52.9% P 33.7% F FIRST HARtlONICS I I I F I In i i i I I Ii I

_~~~

S _ 4

_~~~~ x SS:

~~~

_~~~ 5fx5

_~~~ _

, I

_S:OS so _

11

_5ss=I I

-. 71

--;- ;-;  ;-lI r r r _ r _r ._r _

I*"1I fr Figure 5.1 First Harmonic Flux Distribution (BOC) 11

NEDO-33 186, Revision 1-Gcneral Electric Compam KT1C14 MOC 52.9% P 33.7% F

- W FPOc MMP "R SD Mr# FE FIRST WPO)NICS

- f i I I1 5 . .I . .- . I I - r . . . .-

I11I I I i

-4. I I i_

_= -

I

=3-

.~~~

1Ml- 6e-Figure 5.2 First Harmonic Flux Distribution (MOC) 12

NEDO-33186. Revision 1 General Electric Company KT1C14 EOC 52.9% P 33.7% F

- Aib Fwo l"I MI. &.Ua -fr(

FIRST HARMONICS

- t. t-*.

1 IF=

l l-m- T-I I In I I_ I IhII I I IIn I I IM

= = l l

_ I-I I I I_

I I I I I I It

-+

-rT-rr Oml Oh-Figure 5.3 First Harmonic Flux Distribution (EOC) 13

NEDO-33186, Rcvision 1 General Electric Company 5.2 CRNC Channel Grouping The channel groupings are shown in Tables 5.2 through 5.4. The corresponding TRACG channel components are shown in Figures 5.4 through 5.6.

Table 5.2 CRNC Channel Grouping & TRACG Channel Component Number (Exposure = BOC)

CRNC Channel TRAC Channel Number of CRNC Channel TRAC Channel Number of Group Component Physical Group Component Physical Number Channels Number Channels 1 21 7 2 31 7 3 22 46 4 32 46 5 23 53 6 33 53 7 24 51 8 34 51 9 25 48 10 35 48 11 26 11 11 36 11 13 27 29 12 37 29 16 28 47 15 38 48 17 29 41 18 39 40 Single Channel 82 1 Single Channcl 81 1 (I" highiest RPF) (I" highest RPF)

Single Channel 84 1 Single Channel 83 1 (1" harmonic) (1"hannoric)

Single Channel 86 1 Single Channcl 85 1 (It product) (I" product)

Pcripheral Chnnncl 20 46 Pcriphebrl Channcl 30 46 Total Numberof Channels 382 Total Number of Channels 382 14

NEDO-33186, Revision 1 .

Gcneral Electric Company Table 5.3 CRNC Channel Grouping & TRACG Channel Component Number (Exposure = MOC)

CRNC Channel TRAC Channel Numberof CRNC Channel TRAC Channel Number of Group Component Physical Group Component Physical Number Channels Number Channels 1 21 6 2 31 6 3 22 43 4 32 43 5 23 43 6 33 43 8 24 52 7 34 60 9 25 61 10 35 53 I1 26 4 12 36 4 13 27 32 14 37 32 15 28 40 16 38 40 18 29 52 17 39 52 Single Channel 82 1 Single CILanncl 81 I (1"hiighest RPF) (I" highest RPF)

Single Channcl 84 1 Single Channel 83 1 (I" harmonic) (I" hannonic)

SinglC ChannCl 86 1 Single Channel 85 1 (l product) (I product) _

1Peripheral Clanncl 20 46 Periphe al Channel 30 46 Total Number of Channels 382 Total Numbcr of Channels 382 15

- - n ANEDO-33186,Rcvision I Gcneral Electric Company Table 5.4 CRNC Channel Grouping & TRACG Channel Component Number (Exposure = EOC)

CRNC Channel TRAC Channel Numberof CRNC Channel TRAC Channel Numberof Group Component Physical Group Component Physical Number Channels Number Channelq 2 21 3 1 31 3 3 22 38 4 32 41.

6 23 50 5 33 47 7 24 55 8 34 56 10 25 59 9 35 58 12 26 2 1I 36 3 13 27 40 14 37 39 16 28 45 15 38 45 18 29 41 17 39 41 Single Channel 82 1 Single Channel 81 1 (I" Ihighest RPF) (I" higthest RPF)

Singlc Chunnel 84 1 Single Channel 83 1 (I" harmonie) _(l harmonic)

Single Channcl 86 1 Single Channel 85 1 (I"product) (1l product)

Peripheral Channel 20 46 Periphcral Channel 30 46 Total Number of Channels 382 Total Number of Channels 382 16

NEDO-33186Reivision 1 General Electric Compan) 30 30 30 30 30 30 30 30 30 30 30 30 20 20 30 35 35 35 35 35 34 34 34 34 34 34 34 24 24 20 30 30 35 35 38 35 38 35 38 39 39 39 34 39 34 29 24 24 20 20 30 35 33 33 33 38 33 33 35 35 35 34 34 34 29 24 24 24 24.20 30 35 33 32 32 37 33 38 33 38 35 35 39 34 3 24 29 24 24 24 24 20 30 30 38 33 37 32 37 32 32 33 38 33 38 38 34 39 34 24 24 29 25 29 25 29 20 20 30 35 33 37 36 36 32 32 38 38 33 33 38 38 34 3 292924 25 28 28 28 25 25 20 30 35 33 32 32 36 36 37 32 38 38 38 33 38 39 34 3 29 29 25 29 28 28 23 23 25 25 20 30 35 33 32 32 36 31 37 32 37 32 33 33 33 35 34 34 24 24 24 28 25 28 23 28 23 23 25 24 20 30 33 38 32 36 31 31 32 37 32 32 32 38 35 39 39 34 29 24 25 25 28 25 23 23 27 23 28 25 20 30 33 32 37 31 31 37 38 32Ei 36 37 33 35 39 3 24 29 28 23 25 28 28 23 23 27 23 25 20 30 33 37 32 37 32 38 37 32 32 37 37 33 35 39 3 24 24 29 28 23 23 28 28 23 27 23 28 25 20 30 33 32 32 37 32 37 32 37 32 33 33 39 34 29 24 25 25 28 23 28 23 27 22 22 23 23 20 30 35 37 32 37 31 32 32 32 33 33 38 35 39 3 24 29 25 25 23 22 22 22 22 27 22 28 25 20 30 33 37 31 32 36 36 36 32 38 38 39 35 39 3 2929 24 29 28 28 22 27 26 27 22 2 28 23 20 30 33 38 32 32 37 36 37 32 38 38 39 34 39 3 29 29 25 29 28 28 22 26 26 26 22 21 27 23 20 30 35 38 32 37 32 32 32 32 33 35 35 39 292925 28 23 23 22 22 22 21 27 22 27 25 20 30 33 33 32 32 37 33 38 33 38 35 35 343 24 24 29 23 23 22 27 22 27 22 27 22 22 23 20 30 35 38 33 37 33 38 38 33 33 38 39 34 3 29 29 25 23 27 27 22 22 27 28 22 27 22 27 23 20 30 35 33 37 33 33 38 38 35 33 38 39 34 34 29 29 25 23 27 26[M 22 28 27 21 21 27 22 23 20 30 35 38 33 37 33 33 35 38 35 35 34 392 29 29 25 28 22 22 22 27 22 21 21 26 22 28 23 20 30 34 35 33 33 38 33 38 35 38 34 34 34 24 24 25 23 23 23 22 27 22 27 21 26 22 22 23 25 20 30 35 35 33 33 38 38 39 35 39 3 29 24 29 28 23 28 28 28 22 27 26 26 22 22 23 25 20 30 35 35 38 38 38 35 34 39 3 24 24 28 28 23 23 28 28 22 22 26 26 27 23 25 20 30 30 39 35 39 35 39 34 3 2429 2429 28 23 28 23 22 22 27 22 27 23 28 20 20 30 34 34 34 34 39 3 29 24 29 25 25.28 23 28.23 27 22 22 23 25 20 30 34 34 34 34 3 24 24 24 25 25 25 23 23 28 23 23 23 25 20 30 30 34 34 3 24 29 24 29 29 29 28 25 28 25 28 25 25 20 20 30 34 3 24 24 24 24 24 24 24 25 25 25 25 25 20 30 3 20 20 20 20 20 20 20 20 20 20 20 20 Figure 5.4 TRACG Channel Grouping (BOC) 17

NEDO-33 186. Revision 1 Geneml Electric Company 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 34 34 34 34 34 34 34 35 35 35 35 35 35 35 30 30 30 34 33 38 33 38 33 38 38 39 39 34 39 35 39 35 35 30 20 30 33 32 32 32 37 32 32 33 33 34 34 34 34 39 35 35 35 3N 20 30 34 33 32 31 36 32 37 32 37 33 33 38 34 39 35 39 35 3 24 24 20 30 30 38 33 37 32 36 31 32 32 37 32 38 38 34 38 34 35 353 2429 24 29 20 20 30 33 33 37 37 37 31 32 38 38 33 33 38 38 34 34 39 39 353 29 29 29 24 24 20 30 34 32 32 31 37 37 37 32 38 38 38 33 38 38 34 39 39 393 29.29 29 25 25 25 24 20 30 34 33 32 36 31 37 32 37 32 33 32 33 33 34 34 34 353 224 29 25 29 25 25 25 24 20 30 34 38 32 36b 32 32 377132 32 37 33 38 39 34 393 24 29 24 25 25 28 25 29 24 20 30 34 33 37 31 32 38 38 32 32 37 37 33 34 39 39 35 35 29 29 24 25 29 29 25 23 28 25 24 20 30 34 37 32 37 32 38 38 322 37 38 33 34 39 39 3532 29 29 25 25 29 29 25 28 23 28 25 20 30 34 33 32 32 37 32 37 32 37 33 33 33 38 3535 24 25 28 25 28 23 28 23 23 25 25 20 30 34 38 32 37 32 32 32 32 33 33 34 38 34 39 29 24 25 25 23 23 23 23 27 23 28 25 20 30 34 38 33 32 37 37 37 33 38 39 39 35 39 3 29 29 24 29 29 28 23 27 27 27 22 23 28 25 20 30 34 38 33 32 37 37 37 33 38 39 39 35 39 3 29 29.24 29 29 28 23 27 27 27 22 23 28 25 20 30 34 38 33 37 33 33 33 33 34 34 35 39 32929 25 28 25 23 23 22 22 2222 27 22 28 25 20 30 34 34 33 33 38 33 38 34 38 34 353 2924 24 28 23 23 23 27 22 27 22 27 22 22 23 25 20 30 34 38 33 38 34 39 39 34 4393 24 24 29 29 25 23 28 27 22 22 28 28 22 27 22 27 25 20 30 35 34 38 33 34 39 39 34 35 39 3 24 24 29 29 25 23 27 27 22 2228 28 22 21 27 23 25 20 30 35 39 34 38 34 34 35 39 35 3 229 25 29 28 23 27 22 22 27 22 22 26 22 28 25 20 30 35 35 34 34 39 34 39 35 3 2424 25 2525 23 23 22 23 22 27 22 27 21 26 22 23 25 20 30 35 34 34 34 39 39 24 29 29.25 28 28 23 28 28 28 22 27 27 27 21 22 22 25 20 30 35 35 39 39 39 24 24 29 29 25 25 28 28.23 23 28 28 22 21 27 27 27 23 23 20 30 30 39 35 393 29 24 2425 28 25 28 28 22 27 22 22 21 26 22 27 23 28 20 20 30 35 3 2424 29 24 29 25 28 23 23 27 22 27 22 26 21 22 23 25 20 3 24224 24 29 25 25 25 25 23 23 22 22 27 22 22 22 23 20 3 20 24 24 29 24 29 25.29 20 28 28 23 28 23 28 23 25 20 20 20 24 24 24 24 24 24 24 25 25 25 25 25 25 25 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 Figure 5.5 TRACG Channel Grouping (MOC) 18

NEDO-33186, Revision 1 Gencral Electric Company 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 34 35 35 35 35 35 34 34 34 34 34 34 34 34 30 35 33 39 33 39 33 39 38 38 38 34 38 34 38 34 20 20 30 33 32 32 37 32 33 33 35 35 35 35 34 38 34 3 24 24 20 30 35 32 32 37 32 37 32 39 33 35 39 35 38 34 3 34 24 24 24 20 30 30 39 33 32 37 31 32 32 37 33 39 39 35 38 34 34 28 24 28 24 28 20 20 30 35 33 37 37 32 32 37 37 33 33 39 39 35 34 38 3 24 24 28 28 28 24 24 20 30 35 32 32 32 37 37 32 37 37 37 33 39 39 35 38 38 38 24 28 28 28 25 25 25 24 20 30 35 33 32U3 37 32 37 32 33 33 33 33 35 35 34 3 24 28 24 28 25 29 25 25 25 24 20 30 35 39 32 36. 32 36 32 32 32 37 33 39 38 34 3 24 24 24 28 25 25 25 29 25 28 24 20 30 35 33 37 31 32 37 32 32 37 37 33 35 39 38 34 34 28 28 24 25 29 29 25 23 29 25 24 20 30 35 37 32 37 32 37 32 32 37 39 33 35 38 38 3 22828 25 25 29 29 23 29 23 29 25 20 30 35 33 32 32 37 37 :81 37 33 33 33 39 35 34 3 24 24 25 29 23 29 23 29 23 23 25 25 20 30 35 39 32 37 32 32 32 33 33 33 39 35 24 28 25 25 25 23 23 23 23 27 23 29 25 20 30 35 39 33 32 37 37 33 39 39 39 35 38 28 28 25 28 29 29 23 27 29 29 23 23 29 25 20 30 35 39 33 33 39 37 33 39 39 38 35 38 28 28 25 29 29 29 23 27 27 27 22 23 29 25 20 30 35 39 33 37 33 33 33 35 35 35 38 34 28 25 29 23 23 23 22 22 22 22 27 22 29 25 20 30 35 35 33 33 39 39 33 39 35 34 24 25 29 23 23 23 27E 27 22 27 22 22 23 25 20 30 34 39 33 39 33 39 35 35 38 U24 28 28 25 23 29 27 22 22 27 27 22 27 22 27 25 20 30 34 35 39 33 35 39 35 34 38 24 24 28 29 25 23 27 27 22 22 27 27 22 21 27 23 25 20 30 34 38 35 39 35 35 38 34 28 24 28 29 23 27 22 22 22 27 22 2-2N 26 22 29 25 20 30 34 35 35 35 39 38 34 38 24 25 25 23 23 23 23 22 27 22 27 21 260 22 23 25 20 30 34 35 35 35 38 38 34 28 28 28 25 29 29 23 27 27 27 22 27 27 27 22 22 22 25 20 30 34 34 38 38 34 34 28 28 24 25 29 29 23 23 27 27 22 22 27 27 27 23 25 20 30 30 38 34 24 24 24 28 25 29 29 23 27 22 22 21 27 22 27 23 29 20 20 30 34 24 28 24 28 25 29 25 23 29 23 27 22 27 22 22 23 25 20 30 24 24 28 24 25 25 25 25 23 23 23 27 22 23 23 25 20 30 24 24 28 24 28 24 28 28 28 29 23 29 23 29 23 25 20 20 20 24 24 24 24 24 24 24 24 25 25 25 25 25 24 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 Figure 5.6 TRACG Channel Grouping (EOC) 19

NEDO-33186.~Revision 1 Gcncral Electric Company 53 TRACG Steady-State Analysis All TRACG steady-state analyses have been run long enough to ensure the steady-state conditions have been achieved.

The radial peaking factors for the hot channels are shown in Table 5.5.

Table 5.5 TRACG Hot Channel Information Cycle Cha'nnel' :Channel I Channel 'Channel' ;Channl,' Channel QExpoiure~ .81 - 82 4 :8 83 85 oc'ation' Loction, Location Location' Loution eLocation

-RPF RPF RPF . RPF .RPF- IRPF:

(10.11) (21.20) (4.13) (27.18) (7.14) (24.17)

"3C 1.369 1.369 1.170 1.170 1.308 1.308 (10,10) (21.21) (5,9) (26.22) (6,10) (25.21)

MOC 1.387 1.387 1269 1.269 1.305 1.305 EOC (9,13) (22,18) (5.9) (26.22) (6,10) (25,21) 1.371 1.371 1 .252 1 .252 1.308 1.308 20

,.-. . NEDO-33186, Revision 1 ...

Gcneral Electric Company 5.4 TRACG Transient Analysis Figure 5.7 shows the hot channel flow rates as a function of time, Figure 5.8 displays the hot channel power variation as a function of time and Figure 5.9 illustrates CPR variation as a function of time for the Hope Creek BOC condition. Figures 5.10 through 5.12 show the corresponding curves for Hope Creek MOC condition. Figures 5.13 through 5.15 show the corresponding curves for the Hope Creek EOC condition.

21

NEDO-33186, Revision I Gcncral Electric Company

))Figure 5.7 Transient Stability Analysis. Channel Flow Oscillations.

cycle Expnsiure = TROC.

22

NEDO-33186, Revision I General Electric Compamn

((

JiFigure 5.8 Transient Stability Analysis. Channel Power Oscillations.

Cycle Exposure = BOC 23

))Figure 5.9 Transient Stability Analysis. Chan CPR Oscillations.

Cycle Exposure = BOC 24

NEDO-33186, Revision I General Electric Company

))Figure 5.10 Transient Stability Analysis. Channel Flow Oscillations.

Cycle Exposure = MOC 25

NEDO-33186,Revision I General Electric Company

[I

))Figure. 5.11 Transient Stability Analysis. Channel Power Oscillations.

Cycle Exposure = MOC 26

NEDO-33186, Revision I General Elcctric Company

))Figure 5.12 Transient Stability Analysis. Channel CPR Oscillations.

rcycle Exposure = MOC 27

NEDO-33 186, Revision 1 Gencral Electric Company

((

flFigure 5.13 Transient Stability Analysis. Channel Flow Oscillations.

Cycle Expnnire = EOC 28

NEDO-33 186, Revision 1 General Electric Company 1[

))Figure 5.14 Transient Stability Analysis. Channel Power Oscillations.

Cyele Expomire = EOC 29

NEDO-33186,Revision 1 Gencral Electric Company

))Figure 5.15 Transient Stability Analysis. Channel CPR Oscillations.

Cycle Fxpnciire = EOC t 30

NEDO-33186. Revision I Gcneral Electric Company 5.5 Composite DIVOM Curve The BWROG Procedure Guideline defines a new process that takes into account that the channel with the highest ACPRJICPR oscillations may not have the highest power oscillations, resulting in an unnecessarily conservative (i.e. too steep) DIVOM slope.

1]

If I]

For BOC the composite channel was H[

1]

For MOC the composite channel was ((

1]

No DIVOM curve for EOC was drawn since it represents limit cycle oscillation with very small amplitude with no appreciable CPR degradation (Figures 5.13 through 5.15).

))

31

NEDO-33186, Revision 1 General Electric Company flFigure 5.16 OM vs. Time (BOC) 32

  • ... NEDO-33186, Revision I Gcncral ]Ecctric Company I[

))Figure 5.17 ACPR/ICPR vs. Time (BOC) 33

NEDO-33 186, Revision 1 Gcnmeral Elcctric Company

[I

))Figure 5.18 DIVOM Slope for Cycle Exposure = BOC, MOC 34

NEDO-33 186, Revision I Gencrl Elcctric Company

((

))Figure 5.19 OM vs. Time (MOC) 35

NEDO-33186, Revision I Gcncral Electric Company

((

))Figure 5.20 ACPRIICPR vs. Time (MOC) 36

NEDO-33186, Revision I General Electric Company 5.6 Sensitivity Study Analysis 5.6.1 Core Flow Sensitivity The core flow sensitivity was performed by increasing the rated core flow from 33.7% to 38.7%

at the MOC exposure since the oscillation amplitude is very small at the BOC exposure with 5%

flow sensitivity. The 5% flow sensitivity is specified in the BWROG DIVOM Guideline. The TRACG results for this case are shown in Figures 5.21 through 5.23. The corresponding composite DIVOM slope is 0.485 as shown in Figure 5.24. Therefore, no flow sensitivity in the DIVOM slope was found and the state-point representing natural circulation is used.

5.6.2 Radial Peaking Factor Sensitivity

))

37

NEDO-33186, Revision 1 Gcncral Electric Company

))Figure 5.21 Transient Stability Analysis. Channel Flow Oscillations.

Cycle Exposure = MOC, Core Flow Sensitivity 38

NEDO33186, Revision 1 General Elcctric Company

))Figure 5.22 Transient Stability Analysis. Channel Power Oscillations.

Cycle Exposure = MOC, Core Flow Sensitivity 39

NEDO-33186, Revision 1 Gcneral Electric Company I[

))Figure 5.23 Transient Stability Analysis. Channel CPR Oscillations.

Cycle Exposure = MOC, Core Flow Sensitivity 40

- NEDO-33186, Revision 1 ,- I Gcncral Ekctric Company

))Figure 5.24 DIVOM Curve for Cycle Exposure = MOC, Core Flow Sensitivity 41

NEDO-33186, Revision I General Electric Company

((

JiFigure 5.25 Transient Stability Analysis. Channel Flow Oscillations.

Cycle Exposure = BOC, Radial Peaking Sensitivity 42

rl %,

NEDO-33186,Revision I Gcneral Elcotric Company

))Figure 5.26 Transient Stability Analysis. Channel Power Oscillations.

Cycle Exposure = BOC, Radial Peaking Sensitivity 43

NEDO-33186,Revision 1 General Electric Company JiFigure 5.27 Transient Stability Analysis. Chan CPR Oscillations.

Cycle Exposure = BOC, Radial Peaking Sensitivity 44

NEDO-33 186, Revision 1 Gcncrat Elcctric Company

))Figure 5.28 DIVOM Curve for Cycle Exposure = BOC, Radial Peaking Sensitivity 45

- QI NEDO-33186. Revision I General Electric Company 6.0 Conclusions For Hope Creek Cycle 14 MCAR. the bounding DIVOM curves are calculated to be ((

1]

46

NEDO-33186, Revision I General Electric Company 7.0 References

1. NEDO-32465-A, Licensing Topical Report, "Reactor Stability Detect and Suppress Solutions Licensing Basis Methodology for Reload Applications," August 1996.
2. MFN-01-046, GENE 10 CFR Part 21 Notification, Stability Reload Licensing Calculations Using Generic DIVOM Curve, August 31, 2001.

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