ML053180375
| ML053180375 | |
| Person / Time | |
|---|---|
| Site: | Hope Creek  |
| Issue date: | 04/30/2005 |
| From: | Thacker E, Yang A General Electric Co |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| DRF 0000-0029-5854, LCR H05-01, LR-N05-0329 NEDO-33185 | |
| Download: ML053180375 (50) | |
Text
Attachment 7 LR-N05-0329 LCR H05-01 NEDO-331 85 Hope Creek Cycle 13 TRACG DIVOM Study (ELLLA)
i GE Energy, Nuclear 3901 CastleHayne Road Wimington, NC 28401 NEDO-33185 Class I DRF 0000-0029-5854 Apfil 2005 Haope Creek Cycle 1;3 TRACG DIV+OM! Study (ELLLA)
Prepared by:
A.'1.Yanrg
-Approuvedby:
c 4M a
E.Geacker Erlject Manager Geneial Electiic Company
NEDO-33 185 General Electric Company Non Proprietary Notice This is a non-proprietary version of the document NEDO-33 185, 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 completeness, accuracy or usefulness of the information contained in this document, or that its use may not infringe privately owned rights.
ii
NEDO-33 185 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 4.0 DIVOM Methodology...........................
6 4.1 Channel Grouping...........................
7 4.2 Computer Codes...........................
9 5.0 Results and Discussion..........................
10 5.1 PANACA Subcriticality Results..........................
10 5.2 CRNC Channel Grouping..........................
14 5.3 TRACG Steady-State Analysis..........................
20 5.4 TRACG Transient Analysis..........................
21 5.5 Nominal DIVOM Curve..........................
31 5.6 Sensitivity Study Analysis..........................
35 6.0 Conclusions..........................
44 7.0 References....................................................................................................................45 iii
NEDO-33 185 Gcncral Elcetric Company ACRONYMS AND ABBREVIATIONS ltem ShortTorm Description --
1 BOC Beginning Of Cycle 2
BWROG Boiling Water Reactor Owners' Group 3
CPR Critical Power Ratio 4
DIVOM Delta CPR Over Initial MCPR Versus Oscillation Magnitude 5
EOC End Of Cycle 6
GENE General Electric Nuclear Energy 8
GNF Global Nuclear Fuels 9
HCOM Hot Channel Oscillation Magnitude 10 ICPR Initial Critical Power Ratio 11 LPRM Local Power Range Monitor 12 MCPR Minimum Critical Power Ratio 13 ELLLA Extended Load Line Limit Analysis 14 MOC Middle Of Cycle 15 MWt Megawatt Thermal 16 OLMCPR Operating Limit Minimum Critical Power Ratio 17 OM Oscillation Magnitude 18 OPRM Oscillation PowerRange Monitor 19 RPF Radial Peaking Factor 20 SLMCPR Safety Limit Minimum Critical Power Ratio 21 2RPT Two Recirculation Pump Trip 22 TLO Two Loop Operation iv
NEDO-33185 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) for use in Hope Creek Cycle 13 operation. The resulting curve defined as the Delta CPR over Initial MCPR Versus the Oscillation Magnitude (DIVOM) provides the basis for Option m 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 37% rated core flow along the highest licensed rod line (Extended Load Line Limit Analysis, ELLLA 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 I was used in this study, supplemented by the BWROG DIVOM Procedure Guideline (Reference 2) and an internal GENE/GNF 50.59 evaluation for TRACGO4.
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 TRACG computer code was used to simulate the transient. Plant-specific TRACG basedecks, which reflected Hope Creek Cycle 13 core loading (600 bundles of SVEA96+ and 164 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 (ACPR/ICPR) for the limiting bundles in the TRACG analysis.
For this application the TRACG04/PANACI1 codes were used in establishing the DIVOM curves. Based on the Cycle 13 core loading, which includes the first reload of GE14, [
Jl Because the calculated DIVOM is conservative, its applicability beyond Cycle 13 may be assessed for future application based on the similarity in core design and operating strategy.
1
NEDO-33 185 Gcncral 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 l. The TRACG stability analyses have been used to establish this relationship between the HCOM 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 1, 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 IT 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 has made a Part 21 Notification (Reference 3) that identified the DIVOM deficiency.
Subsequently, the BWROG has developed a guideline (Reference 2) 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 (Reference 2). The calculated DIVOM curve reflects the core/fuel designs and plant operating strategy for Hope Creek Cycle 13.
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-33185 Gcncral Electric Company 3.0 Bases & Assumptions The Hope Creek Cycle 13 core contains both SVEA96+ and GE14 fuels. This cycle is the first reload of GE14 fuel.
The TRACG DIVOM calculations were performed based on specified operating conditions for Hope Creek Cycle 13. Three conditions at different exposure level were considered:
- 1) BOC (Cycle Exposure =0 MWDIST),
- 2) MOC (Cycle Exposure = 6000 MWD/ST), and
- 3) EOC (Cycle Exposure = 10347 MWD/ST).
The choice of three exposure points follows the BWROG DIVOM guideline (Reference 2). [
This analysis is a Hope Creek-specific evaluation to establish a cycle-specific DIVOM value based on Cycle 13 core loading. ((
)) (Reference 1).
The base case stability analysis was performed at the power/flow state point corresponding to a post two-pump trip condition at 37% rated core flow along the highest licensed rod line (Reference 4). 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 42% of rated core flow along the highest licensed rod line.
This analysis is used to identify any DIVOM curve sensitivity to core flow (Reference 2).
The second is a radial peaking sensitivity in which the radial peaking factor is increased by 5% to 10% on the limiting channel (Reference 4). This analysis is used to reasonably represent expected variations in radial peaking factor as the result of normal plant operation.
The design inputs to these calculations are modeled in:
- The Hope Creek Cycle 13 TRACG basedeck, The Hope Creek Cycle 13 PANACI I wrap-ups corresponding to three different cycle exposure points at rated power/flow conditions, and
- The Hope Creek Cycle 13 ISCOR basedeck.
3
NEDO-33 185 General Elcctric Company The following TRACG bases/assumptions are used in this analysis and reflected in the TRACG basedecks:
((
1]
- Consistent with the standard stability TRACG methodology, ((
Ji
- The core is loaded with SVEA96+ and GE14 fuels according to Hope Creek Cycle 13 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]
1]
The feedwater enthalpy is defined as steady state feedwater enthalpy 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-33185 General 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 13 is composed of SVEA96+ and GE14.
- The rated thermal power level, under normal plant operating conditions, is 3339 MWt, at which Hope Creek is currently licensed to operate the plant.
The rated core flow is 100.0 Mlbm/hr.
- The reactor dome pressure under normal plant operating conditions is 1020 psia.
- The upper boundary of the reactor two loop operation (TLO) operating domain, at which Hope Creek is currently licensed to operate the plant. This corresponds to the ELLLA boundary for Hope Creek, with an upper intercept at 100% rated core power and 87% rated core flow.
- Nominal radial peaking factor and nominal rod patterns as defined in the standard reload rod patterns for normal plant operation.
5
I *. NEDO-33185 Gcneral Electric 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 (Reference 2) and an internal GENE/GNF 50.59 evaluation of the TRACGO4 executable.
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
- 13. PANACEA calculations were performed to obtain three-dimensional power distribution, subcriticality and harmonic contour at 37% 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 37% 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). [
1))
Step 3. 1[
TRACG graphics information is retrieved with GRIT computer code and analyzed with the ANALYZE computer code to determine the relationship between ACPRIICPR and the oscillation magnitude.
6
NEDO-33185 Gcncral Electric Compam 4.1 Channel Grouping The CRNC channel grouping is based on radial peaking factor (RPF) and relative first power harmonics (RPINDS). The RPF and RPINDS 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 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 either the second radial peaking or 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.
7
NEDO-33185 Gencral Electric Company 19 19 19 17 19 17 17 19 17 17 17 19 19 17 7 17 7
19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 17 16 16 14 14 11 11 11 11 14 14 16 16 17 19 19 17 16 16 14 16 14 9
11 11 9
11 16 14 16 16 17 10 19 17 17 17 17 17 16 16 7 17 17 16 5 16 5 16 14 14 3 14 5 14 3 14 11 14 11 11 3 14 11 II I
11 11 1
I 1 1 I
I 9
11 9
11 11 8
3 11 14 14 11 11 3
16 16 3
19 17 17 17 7
17 7
17 5
16 5
14 3
14 5
5 14 3
14 3
14 1
16 S
16 7
17 17 17 19 19 17 17 17 17 7
17 17 17 7
17 17 16 5
16 16 5
16 16 17 5
16 16 16 5
16 16 17 17 19 19 18 18 18 8
18 18 18 8
18 18 18 8
18 18 18 18 8
17 17 17 7
17 17 17 7
17 17 17 19 19 18 18 15 15 6
15 15 15 6
18 15 15 6
15 15 6
15 18 18 8
18 18 18 8
18 18 18 18 19 19 18 18 18 6
15 13 15 6
13 15 15 6
13 13 13 13 6
18 15 15 8
18 18 18 8
18 18 18 19 19 18 18 15 8
18 15 15 4
12 12 12 4
15 15 4
12 12 13 6
15 18 18 8
18 18 18 19 19 18 18 18 18 18 6
12 12 12 4
12 13 13 12 4
13 12 13 6
18 18 18 18 18 19 19 18 15 15 6
12 4
12 2
10 2
2 12 2
12 4
13 6
15 18 18 19 19 18 15 15 13 13 12 10 2
12 12 2
12 13 15 13 15 15 18 19 19 19 18 15 15 13 15 12 10 12 12 10 13 15 15 15 18 18 10 19 19 18 15 15 13 13 12 12 12 12 13 13 15 15 18 19 19 19 19 19 19 19 19 19 19 19 19 19 19 19 11 1 11 3 11 11 11 3 11 11 14 3 14 11 11 14 16 16 17 19 14 5
16 16 17 3 11 3
16 5 16 5 17 16 17 17 17 7 17 7 19 17 19 19 17 10 17 17 19 17 19 Figure 4.1 CRNC Channel Grouping (BOC) 8
NEDO-33185 General Electric Company 4.2 Computer Codes The following computer codes are used in this analysis:
Table 4.1 Computer Codes Used
-name I Version I 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. An internal GENE/GNF 50.59 evaluation of the TRACGO4 versus 1RACGO2 DIVOM analysis showed essentially the same results. Therefore, the application of TRACGO4 for the current DIVOM evaluation is acceptable.
9
NEDO-33185 General Electric Compamn 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. ((
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 Hope Creek Cycle 13 Hlarmonics
.Cycle Tundamental.
Azimuthal 'I tSubcrfticality
'Subcitilcaliq- 'sSubcriticality Expoure cigenvalue irt' 1(st' (2n'd '
(3r'd
- Harmonic),
hamonic.,-haonic).
harmonlc)
_ _ _ _I _. _.-
e lg e n v a lu e
_..,-^;:.
BOC 1.011711 1.004754 0.006844 0.007074 0.012007 MOC 1.012061 1.004874 0.007067 0.007348 0.010109 EOC 1.011953 1.0U3016 0.007827 0.007965 0.009767 10
NEDO-33 185 Gcncral Electric Company KTIC13 BOC 56.0% P 37.0% F
-ThePO FIRST fM{A ICS WAS) FS L-Abn 9.E-r- -
r-
&.- L I- &-
_I I I I
I X1*"
aT Figure 5.1. First Harmonic Flux Distribution (BOC) 11
NEDO-33 185 Gencral Electric Company H S P-W M..
KTIC13 MOC 56.0% P 37.0% F FIRST HAM4ICS t1 hcr i.,
C_ _ _ _
_ I
= _C- _ !
I I I I i In
= m SI
___I
_R l
I
-_4-
_4-l.
11 Figure 5.2. First Harmonic Flux Distribution (MOC) 12
NEDO-33185 General Electric Company KTMC13 EOC 56.0% P 37.0% F ftti POr FIRST HAINICS E.
I r-T-
r-T-
T-T-
T-T-T-
T-r-T-
T-T- T-T-
T-T-T- T-
--, rl---T---,F-I r-7-
r-T-
T-T-
V-V--
T-T-
T-T-
T-T-r-T-
t I1 1+
Figure 5.3. First Harmonic Flux Distribution (EOC) 13
NEDO-33185 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 Numberof Group Component Physical Group Component Physical Number Channels Number Channels 2
21 7
1 31 6
4 22 12 3
32 14 6
23 31 5
33 30 8
24 32 7
34 32 10 25 5
9 35 4
12 26 30 11 36 31 13 27 35 14 37 36 is 28 63 16 38 62 18 29 119 17 39 117 Single Channel 82 1
Single Channel 81 1
(I" highest RPF)
(I" highcst RPF)
Single Channel 84 1
Single Channel 83 1
(21 Ihighest RPF)
(2 n" IhighIest RPF)
Singlc Channel 86 1
Singlc Channcl 85 1
(I" hanrmonic)
(It Inannonic)
PeriphmraI Channcl 20 46 Peripherml Channncl 30 46 Total Number of Channels 383 Total Number of Channels 381 14
NEDO-33185 General Electric CompanY Table 5.3 CRNC Channel Grouping & TRACG Chaninel (Exposure = MOC)
Component Number CRNC Channel TRAC Channcl Numberof CRNC Channel TRAC Channcl Numberof Group Component Physical Group Component Physical Number Channels Number Channels 1
21 2
2 31 2
3 22 16 4
32 16 5
23 33 6
33 33 7
24 28 8
34 28 10 25 4
9 35 5
I 1 26 30 12 36 29 14 27 44 13 37 40 16 28 64 15 38 63 17 29 113 18 39 116 Single Chlnnel 82 1
Single CMannel 81 1
(1" highest RPF)
(I" highest RPF)
Single Channel 84 1
Single Channcl 83 1
(I" Iarmonic)
(I" hannonic)
SingIc Channel 86 1
Singlc Channel 85 1
(2 harmonic)
(2 nd harmonic)
Peripheral Channel 20 46 PcripihemI Channcl 30 46 Total Number of Channcls 383 Total Number of Channels 381 15
e b
s NEDO-33185 General Elcctric Company Table 5.4 CRNC Channel Grouping & TRACG Clianinel Component Number (Exposure = EOC)
CRNC Channel TRAC Channel Numberof CRNC Channel TRAC Channel Numberof Group Component Physical Group Component Physical Number Channels Number Channels 2
21 5
1 31 4
3 22 25 4
32 26 5
23 26 6
33 26 7
24 23 8
34 23 9
25 11 10 35 10 12 26 28 II 36 30 13 27 SI 14 37 50 15 28 70 16 38 71 18 29 94 17 39 93 Single Channel 82 1
Single Channel 81 I
1O" highest RPF) l(1 highest RPF)
Singlc Channel 84 1
Single Channcl 83 1
(1" harmonic)
(1 harmonic)
Sinalc Channcl 86 1
Single Channcl 85 1
(2; harmonic)
(2t'd harmonic)
Peripheral Channel 20 46 Periphe ml Channel 30 46 Total Number of Channels 382 Total Numbcr of Channels 382 16
-NEDO-33185 General Electric Company 30 30 30 39 30 39 39 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 39 39 38 38 38 38 37 37 38 37 37 36 35 36 36 36 36 36H 37 36 37 38 38 37 38 38 39 38 30 39 30 30 38 38 37 37 36 36 31 36 36 31 36 36 37 37 38 38 39 30 38 33 37 32 36 31 36 31 31 35 31 36 32 37 33 38 38 39 30 30 30 39 34 39 34 38 32 37 32 36 35 36 36 35 36 32 37 32 38 33 39 34 39 30 30 30 39 39 39 34 39 39 38 33 37 36 36 32 38 38 32 36 36 36 32 38 38 39 34 38 39 39 30 30 39 39 39 34 39 34 39 33 38 33 37 32 37 33 33 37 32 37 32 37 33 38 33 38 34 39 39 39 30 30 39 39 39 39 34 39 30 39 39 39 34 39 39 20 20 29 29 29 29 29 24 3429
-39 29 20 29 29 29 24 29 29 20 29 29 29 24 29 29 39 34 39 20 29 29 24 28 28 29 20 29 29 28 23 28 23 34 39 39 38 34 39 38 38 34 38 38 39 33 39 39 37 33 38 37 37 33 372 38 3 7 F_ 3 8 37 37 33 37 33 38 33 38 38 37 38 39 37 37 33 38 33 38 33 38 38 38 38 38 33 38 33 38 33 38 38 39 38 39 39 39 39 39 39 30 30 30 39 34 39 34 39 34 38 33 33 38 33 38 34 38 33 38 33 38 33 38 39 39 30 29 24 29 29 29 24 29 29 29 24 29 29 29 29 39 39 39 39 39 39 34 39 38 39 34 39 38 38 34 39 39 30 24 29 28 29 24 28 29 29 29 29 29 24 29 29 29 24 28 23 28 24 28 23 28 23 23 28 24 29 24 29 24 29 24 29 24 20 29 29 28 28 23 28 20 20 29 29 29 29 29 28 23 28 28 23 27 28 28 28 23 28 23 28 23 27 27 29 28 27 28 28 23 28 23 27 23 27 27 28M 27 28tl 27 23 27 27 28 23 27 29 29 23 29 28 28 24 28 28 29 24 28 29 29 24 29 29 29 24 29 24 29 24 29 29 29 29 29 29 29 29 29 29 20 20 20 20 29 29 29 24 28 23 28 23 27 22 27 22 27 23 23 27 22 27 23 28 23 29 24 29 24 29 29 29 20 20 20 29 20 29 29 29 24 29 29 29 23 23 28 26 22 26 27 26 21 22 26 26 25 27 26 27 26 26 25 22 26 27 22 26 27 27 23 23 28 29 24 29 29 29 24 29 29 29 20 20 20 20 29 28 28 23 26 22 26 21 25 21 21 26 21 26 22 27 23 28 29 29 20 20 20 29 20 28 29 28 28 27 28 27 27 26 28 25 26 21M 26 26 26 26 21 25 26 27 27 28 28 28 27 28 28 29
.28 29 29 20 20 20 20 29 28 28 27 27 26 26 26 26 27 27 28 28 29 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 39 39 39 39 34 34 39 39 39 39j 39 39 34 34 39 39 39 39 39 39 30 30 34 39 39 30 Figure 5.4 TRACG Channel Grouping (BOC) 17
NEDO-33185 Gencral Electric Company 30 30 30 30 3 20 20 20 20 20 20 20 20 20 30 39 39 39 39 3 29 29 29 29 29 29 29 29 29 20 30 30 39 39 39 39 39 3 29 29 29 29 29 29 29 29 29 29 20 20 30 39 39 39 39 39 39 3 24 29 29 24 28 28 28 28 29 29 29 20 30 39 39 39 34 39 34 39 343 24 24 28 23 28 23 28 23 28 29 29 20 30 30 39 34 39 34 39 34 39 34 39 3 29 29 28 28 23 28 23 28 24 29 24 29 20 20 30 39 39 39 39 39 34 38 38 39 34 3 29 29 28 23 28 27 27 23 28 29 29 29 29 20 30 39 38 38 33 38 39 38 33 38 38 39 34 29 29 24 28 28 28 23 28 28 28 23 28 28 29 20 30 39 39 38 33 37 33 38 33 38 33 39 34 3 24 24 29 23 28 23 27 23 27 23 27 23 28 29 29 20 30 39 38 37 36 32 36 33 38 38 38 34 39 3 29 29 29 28 23 27 27 27 22 26 22 26 27 28 29 20 30 38 37 37 32 36 36 37 33 37 3939 34 3' 29 29 29 24 29 28 27 22 26 26 26 22 27 27 28 20 30 38 38 36 35 32 36 36 37 33 939 3934 29 24 28 28 28 23 26 26 26 21 25 26 28 28 20 30 38 37 36 36 32 36 32 37 33 38 34 39 34 24 28 23 28 23 27 22 26 21 26 26 27 28 20 30 38 36 32 36 35 36 32 37 37 37 33 38 39 39 29 29 28 23 27 27 27 22 26 25 25 22 26 27 20 30 38 37 36 32 37 38 38 33 37 37 38 33 39 39 29 29E 28 27 27 23 28 27 27 22 26 27 27 20 30 37 37 36 32 37 37 38 33 37 37 38 39 39 29 29 23 28 27 27 23 28 27 27 22 26 27 28 20 30 37 36 32 35 35 36 32 37 37 37 33 38 39 3 29 29 28 23 27 27 27 22 26 26 26 22 26 27 20 30 38 37 36f 36 31 36 32 37 33 38 33 38 24 29 24 28 23 27 22 26 22 26 26 27 28 20 30 38 38 36 35 31 36 3636 33 38 39 38 34 3 29 242929 28 23 27 26 26 22 25 26 28 28 20 30 38 37 37 32 36 36 36 32 37 38 39 34.39 3 29 29 24 29 29 27 23 27 26 26 22 27 27 28 20 30 39 38 37 36 32 36 32 37 37 37 33 38 39 393 29 29 24 28 27 27 23 26 22 26 27 28 29 20 30 39 39 38 33 37 33 37 33 37 33 38 33 39 34 34 29 24 28 23 28 23 28 23 27 23 28 29 29 20 30 39 38 38 33 38 38 38 33 38 38 38 34 39 3 24 29 28 28 23 28 29 28 23 28 28 29 20 30 39 39 39 39 39 33 37 37 38 33 39 39 3 29 24 29 28 28 24 29 29 29 29 29 20 30 30 39 34 39 34 38 33 38 33 38 38 39 3 29 29 24 29 24 29 24 29 24 29 20 20 30 39 39 38 33 38 33 38 33 38 34 34 29 24 29 24 29 24 29 29 29 20 30 39 39 39 38 38 38 38 34 39 39 34 29 29 29 29 29 29 29 20 30 30 39 39 39 39 39 39 39 39 39 3 29 29 29 29 29 29 20 20 30 39 39 39 39 39 39 39 39 3 29 229 29 29 20 30 30 30 30 30 30 30 30 3 20 20 20 20 20 Figure 5.5 TRACG Channel Grouping (MOC) 18
NEDO-33185 Gencral Electric Company 30 30 30 30 30 30 30 3 20 20 20 20 20 20 30 39 39 39 39 39 39 39 3 29 29 29 29 29 29 20 30 30 39 39 39 39 39 39 39 39 3 29 29 29 29 29 29 29 20 20 30 39 39 38 38 38 38 38 34 39 3 24 29 29 29 29 29 29 29 20 30 39 39 38 33 37 33 38 33 39 34 3 29 24 28 24 28 23 28 29 29 20 30 30 39 34 38 33 37 33 38 33 38 38 39 3 29 29 24 28 23 28 23 28 24 29 20 20 30 39 38 38 37 37 32 37 37 38 33 38 39 3 29 24 28 28 27 23 28 28 28 28 29 20 30 39 38 37 32 37 37 37 32 37 37 38 34 39 3 24 28 28 28 23 27 27 27 23 27 28 29 20 30 39 39 38 32 36 32 37 32 37 33 38 33 39 34 3 29 24 28 23 27 22 27 22 27 23 28 29 29 20 30 39 38 37 36 32 35 32 37 37 37 33 38 39 3 29 29 29 24 28 27 27 22 26 22 26 27 28 29 20 30 38 38 37 32 36 35 36 32 37 38 38 34 39 3 29 29 24 29 28 27 22 26 26 26 22 27 28 29 20 30 38 38 36 3M 36 35 36 32 38 38 38 34 3 29 24 28 29 28 23 27 26 26 21 26 27 28 28-20 30 38 38 3610 36 31 35 32 37 33 38 33 38 34 24 29 24 28 23 27 22 25 21 26 21 26 28 28 20 30 38 37 32 36 35 3 5 TI 36 7 3 7 3 3 3 8 39 3 29 29 28 23 27 27 26 21 26 25 26 22 27 28 20 30 38 37 37 32 36 35 36 32 37 37 38 33 39 3 29 29 23 28 27.27 22 26 25 26 22 27 27 28 20 30 38 37 37 32 36 36 36 32 37 37 38 33 39 3 29 29 23 28 27 27 22 26 25 26 22 27 27 28 20 30 38 37 32 36 35 36 31 36 37 37 33 38 39 3 29 29 28 23 27 27 26 25 25 26 22 27 28 20 30 38 38 36 32 38 31 35 32 37 33 38 34 39 24 28 23 28 23 27 22 25 21 28 2 28 28 20 30 38 38 37 36 31 36 36 36 33 38 393834 3 29 24 28 28 28 22 26 25 26 25 26 28 28 20 30 39 38 37.32 36 36 36 32 37 38 39 34 39 3 29 29 24 28 28 27 22 26 25 26 22 27 28 29 20 30 39 38 37 36 32 36 32 37 37 38 34 39 39 3 29 2928232727272225222627282920 30 39 39 38 33 37 32 37 32 37 33 38 34 3 2424 29 23 28 23 27 22 27 22 26 22 28 29 29 20 30 39 38 37 33 37 37 37 33 38 38 38 34 29 29 24 28 27 27 22 27 27 27 22 27 28 29 20 30 39 38 38 38 38 33 37 38 38 34 39 29 29 28 23 28 27 27 22 27 27 28 28 29 20 30 30 30 34 38 33 38 33 38 34 39 39 29 20 28 28 23 28 23 27 23 28 24 20 20 20 30 39 39 38 33 38 34 38 34 39 24 24 29 23 28 23 27 23 28 29 29 20 30 39 39 39 39 39 39 39 34 29 29 24 28 28 28 28 28 29 29 20 30 30 39 39 39 39 3939 31 29 29 29 29 29 29 29 29 29 20 20 30 39 39 39 39 39 39 29 29 29 29 29 29 29 29 20 Figure 5.6 TRACG Channel Grouping (EOC) 19
NEDO-33185 Gencral Elcctric 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
- lCycle iChannel
- Channel 3.Channel, Channel -Channcl Channel
- Exposure, 81 :
_83
-.85..
86 K
- Location Location Location Location sLocation' Location
-RPF -*tRPF--KiFPF FPF
.2RPF.
.iRPF F
BOC (11.16)
(20.15)
(11.15)
(20.16)
(3.17)
(28.14) 1.523 1.525 1521 1.524 1.296 1.296 IO (13.16)
(18.15)
(5,18)
(26.13)
(5.13)
(26,18)
C 1.503 1.510 1.418 1.425 1.422 1.418 EOC (8.14)
(23,17)
(5,13)
(26.18)
(6,12)
(25.19) 1.507 1.508 1.389 1.386 1.439 1.438 20
NEDO-33185 Gencral 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 forthe Hope Creek EOC condition.
21
NEDO-33185 Gcneral Electric Company
((
))Figure 5.7 Transient Stability Analysis. Channel Flow Oscillations.
Cycle Exposure = BOC 22
NEDO-33 185 Gcncral Electric Company
))Figure 5.8 Transient Stability Analysis. Channel Power Oscillations.
Cycle Exposure = DOC 23
NEDO-33 185 Gencral Electric Company
((
))Figure 5.9 Transient Stability Analysis. Chan CPR Oscillations.
Cycle Exposure = BOC 24
NEDO-33185 General Electric Company JlFigure 5.10 Transient Stability Analysis. Channel Flow Oscillations.
Cycle Exposure = MOC 25
NEDO-33185 Gcncmal Electric Company
))Figure 5.11 Transient Stability Analysis. Channel Power Oscillations.
Cycle Exposure = MOC 26
NEDO-33185 Gener11 Elcctric Company
))Figure 5.12 Transient Stability Analysis. Channel CPR Oscillations.
Cycle Exposure = MOC 27
- .. - NEDO-33185 General Elctric Company flFigure 5.13 Transient Stability Analysis. Channel Flow Oscillations.
Cycle Exposure = EOC 28
NEDO-33185 Gcneral Electric Company
((
))Figure 5.14 Transient Stability Analysis. Channel Power Oscillations.
Cycle Exposure = EOC 29
NEDO-33185 General Elcetric Company ri JiFigure 5.15 Transient Stability Analysis. Channel CPR Oscillations.
Cycle Exposure = EOC 30
NEDO-33185 General Electric Company 5.5 Nominal DIVOM Curve The DIVOM result based on nominal radial peaking for the BOC exposure is shown in Figure 5.16.
5.5.1 Composite DIVOM Curve New BWROG guideline (Reference exposure ((
- 2) defines the new process to determine the limiting
))
1]
The composite channel was [(
)) No DIVOM curves for MOC and EOC were drawn since they represent limit cycle oscillations with very small amplitude with no appreciable CPR degradation (Figures 5.10 to 5.15).
31
NEDO-33 185 Gcncral Elcctnc Company flFigure 5.16 DIVOM Slope for Cycle Exposure = BOC 32
I NEDO-33185 General Electric Company flFigure 5.17 OM vs. Time (BOC) 33
NEDO-33185 General Elcctric Company J]Figiure 5.18 ACPR/ICPR vs. Time (BOC) 34
NEDO-33185 Gencral 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 37% to 42% at BOC exposure. The 5% flow sensitivity is specified in the BWROG DIVOM Guideline (Reference 2). The TRACG results for this case are shown in Figures 5.19 through 5.21. The corresponding DIVOM slope is 0.50 as shown in Figure 5.22. Therefore, no flow sensitivity in the DIVOM slope was found and the state-point representing natural circulation can be used.
5.6.2 Radial Peaking Factor Sensitivity
((I 35
NEDO-33 185 Gencral Electric Compainy JiFigure 5.19 Transient Stability Analysis. Channel Flow Oscillations.
Cycle Exposure = BOC,-Core Flow Sensitivity 36
NEDO-33185 General Electric Company
))Figure S.20 Transient Stability Analysis. Channel Power Oscillations.
Cycle Exposure = BOC, Core Flow Sensitivity 37
NEDO-33185 General Elcctric Company
[I
))Figure 5.21 Transient Stability Analysis. Channel CPR Oscillations.
Cycle Exposure = BOC, Core Flow Sensitivity 38
NEDO-33185 Gcneral Elcetric Company
((
))Figure 5.22 DIVOM Curve for Cycle Exposure = BOC, Core Flow Sensitivity 39
NEDO-33185 Gencral Electric Company
[I
))Figure 5.23 Transient Stability Analysis. Channel Flow Oscillations.
Cycle Exposure = DOC, Radial Peaking Sensitivity 40
NEDO-33185 Gcncral Electric Company
))Figure 5.24 Transient Stability Analysis. Channel Power Oscillations.
Cycle Exposure = BOC, Radial Peaking Sensitivity 41
11 il NEDO-33185 Gcneral Electric Company
))Figure 5.25 Transient Stability Analysis. Chan CPR Oscillations.
Cycle Exposure = BOC, Radial Peaking Sensitivity 42
NEDO-33 185 Gcneral Electric Compan
((
))Figure 5.26 DIVOM Curve for Cycle Exposure = BOC, Radial Peaking Sensitivity 43
NEDO-33185 General Electric Company 6.0 Conclusions For Hope Creek Cycle 13, the reasonably bounding DIVOM curves are calculated to be ((
11 44
NEDO-33 185 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. GE-NE-0000-0028-9714-RO, "Plant-Specific Regional Mode DIVOM Procedure Guideline,"
June 2004.
- 3. MFN-01-046, GENE 10 CFR Part 21 Notification, Stability Reload Licensing Calculations Using Generic DIVOM Curve, August 31, 2001.
- 4. Hope Creek Cycle 13 TRACG DIVOM Evaluation Design Input Request (DIR), DRF 0000-0029-5864, November 18, 2004.
- 5. TDP-0138, "TRACG Procedure for Stability Applications," Revision 0, January 2003.
45