ML17310B077
| ML17310B077 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 02/24/1994 |
| From: | ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | |
| Shared Package | |
| ML17310B078 | List: |
| References | |
| NUDOCS 9403080057 | |
| Download: ML17310B077 (15) | |
Text
ENCLOSURE PALO VERDE NUCLEARGENERATING STATION UNIT 1 CYCLE 6 STARTUP REPORT 9403080057 940224 PDR ADOCK 05000528 P
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.",'q Page 1 of 8 TABLEOF CONTENTS Introduction Low Power Physics Testing Power Ascension Testing.
Cycle 5 Core Load Map.
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'ntroduction The Palo Verde Unit 1 Cycle 5 Core is designed for a burnup of 437 Effective Full Power Days (EFPD). The core loading is detailed in the followingtable (Core Map on page 8).
Assembly Designation G3 G2 Gl F5 F4 F3 F2 F1 FO E6 E4 E2 El EO B1 Number of Assemblies 48 24 12 32 16 24 16 Fuel Rods per Assembly 168 52 168 62 180 52 184 52 172 52 168 62 176 62 172 62 180 52 168 62 168 62 168 62 168 62 184 52 208 12 Nominal Enrichment 3.76 3.30 4.03 3.30 4.03 3.76 4.03 3.76 4.03 S.60 4.03 3.60 8.80 S.60 3.80 3.60 8.80 8.60 4.03 3.80 4.03 3.70 3.90 3.60 3.90 3.60 4.03 8.90 4.03 3.90 2.78 1.92 Shims per Assembly 16 16 0
12 16 12 0
16 16 16 16 0
16 Bate Average Exposure Gwd/T 0
0 0
0 21.786 21.332 20.907 22.172 18.647 12,997 32.639 37.105 30.606 35.106 27.667 18.462
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Page 3 of 8 The Cycle 5 core makes use of a low-leakage fuel management scheme, in which previously burned assemblies are placed on the core periphery. The majority ofthe fresh Batch 6 fuel is located throughout the interior ofthe core where they are mixed with previously burned fuel to minimize power peaking.
Initial criticalityfor Cycle 5 was declared at 04:04 on November 24, 1993.
Low Power Physics Testing began at 05:00 on November 24, 1998 and ended at 00:57 on November 25,1993. Power Ascension Testing began at 28:85 on November 27, 1993 and concluded at 12:00 on December 5, 1993.
The testing evolution is controlled by two procedures 72PY-9RX01 "Low Power Physics Testing" and 72PA-9ZZ07 "Reload Power Ascension Test."
The tests performed under the control of 72PY-9RX01 are:
AllRods Out (ARO), Hot Zero Power (HZP), Critical Boron Concentration Isothermal Temperature Coefficient Measurement Rod Swap Testing Inverse Boron Worth Measurement.
The tests performed under the control of 72PA-9ZZ07 are:
Radial Power Distribution - 20% Rated Thermal Power (RTP)
Radial Power Distribution - 70% RTP AxialPower Distribution - 70% RTP Radial Power Distribution - 100% RTP AxialPower Distribution - 100% RTP Hot Full Power, ARO, Critical Boron Concentration.
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Page 4 of 8 Test Criteria Critical Boron Concentration (HZP) g 100 ppm ofpredicted Isothermal Temperature Coefficient Measurement g 3 pcm/ F ofpredicted CEA 1bsting Reference Group g 10% ofpredicted g 15% or g 100 pcm of predicted g 10% ofpredicted g 15%
~ 10% ofpredicted g 0.1 RPD units
< 0.05 RMS g 10% ofpredicted g 0.1 RPD units
< 0.05 RMS g 10% ofpredicted g60 ppm
'II.st Group(s)
'Ibtal Worth Inverse Boron Worth Radial Power Distribution - 20%
Radial Power Distribution - 70%
Peaking Factors - 70%
Radial Power Distribution - 100%
Peaking Factors - 100%
Critical Boron Concentration (HFP)
The following acceptance criteria apply to each ofthe tests performed during Low Power Physics Testing and Power Ascension:
Low Power Physics Vesting AllRods Out (ARO) Critical Boron Concentration (CBC)
This test is performed by obtaining an RCS Boron Sample at equilibrium conditions near ARO (CEA Group 5 -130" W/D) and adjusting this concentration for the reactivity worth of withdrawing Group 6 to ARO.
The measured RCS concentration was 1557ppm which was adjusted to 1558 ppm. The Design HZP ARO CBC is 1656 ppm. This value was within the acceptance criteria.
Isothermal Temperature Coefficient (ITC)
This test is performed by raising and lowering the RCS Temperature and measuring the associated changes with Core Reactivity. The measured ITC with Group 5 at approximately 139" W/D was -1.28 pcm/'F. The prediction forDesign ITC was -1.32 pcm/ F and was corrected to test
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The corrected Design ITC was -1.37 pcm/ F. The measured ITC met the acceptance criteria and satisfied the surveillance requirement ofTechnical Specification 4.1.1.8 Rod Worth Measurements The Rod Swap Measurement method was utilized to test the worth of ALL Shutdown and Regulating CEA Groups.
The basic technique associated with Rod Swap is measuring one Group through the Boration/
Dilutionmethod (Reference Group) and then swapping itwith each ofthe remaining Groups ('II.'st Groups). The results are summarized in the followingtable:
Test Group(s)
Grp 5, SD A(20) 94.00 99.56 Measured Adjusted Position Position Measured Worth
-610.8 Design Worth
-578.2 Percent Difference
-5.33 Grp 2,4 109.50 109.87
-667.7
-647.6
-3.01 D B(9)
Grp 1 109.50 110.24 114.75 114.60 116.25 116.33
-670.4
-692.6
-700.8
-645.0
-657.4
-666.7
-3. 9
-5.09
-4.88 SD B(10) 108.25 108.22
-659.1
-647.5
-1.76 D
(8)
SD B(6)
SD A(21)
D B(7) eference Group (Grp 3) 95.50 95.36 96.47 95.81 126,02 125.88 126,77 126,52
-584.7
-744.1
-587.5
-741,6
-782.5
-575.5
-720.2
-576.0
-720.8
-778.0
-1.58
-8.20
-1.96
-2.82
-0,58
'Ibtal Worth
-7441.8
-7212,9
-8.08 Alltest results met the acceptance criteria.
Inverse Boron Worth The Inverse Boron Worth (IBW)is determined by obtaining the measured worth ofthe CEA Reference Group (Group 3) from Rod Swap Testing and the change in Boron Concentration to get the Reference Group Diluted to the Lower Electrical Limit.The measured IBWwas 125.28 ppm/%EX/K The design IBWwas 123.8 ppm/%6K/K The acceptance criteria was met.
Page 6 of 8
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Power Ascension Testing Flux Symmetry Verification - 20% RTP This test is performed by obtaining a flux map from the Fixed Incore Detector System and processing this information with CECOR. The output from CECOR yields a full core map of Relative Power Density.
The maximum deviation obtained was 8.626%
and the minimum deviation was'-5.455%. The acceptance criteria for this test was met.
Core Power Distribution Verification - 70% RTP This test is performed by obtaining a flux map from the Fixed Incore Detector System and processing this information with CECOR. The output from CECOR yields a full core map of Relative Power Density.
The maximum deviation obtained was 0.0587. The Root Mean Square (RMS) deviation was -0.0159, Allacceptance criteria for the Radial Power Distribution were met.
The second portion of testing at 70% includes the verification ofthe Axial Power Distribution. This involves a comparison of the Axial Shape through 51 nodes with predicted, and a RMS evaluation. Both of these measurements were found to exceed the acceptance criteria. The Axial Deviation was -0.1055 (g 0.1) and the RMS was 0.0628 (~0.05). ARer discussions with ABB/CE it was determined that the Predictions provided did not model the End of Cycle (EOC) 4 adequately. At EOC-4 there was an extensive coastdown performed involving both power reductions and temperature reductions. The model used to predict Cycle 5 values did not include this coastdown.
ABB/CE delivered new predictions for 70% RTP and 98% RTP which properly modelled EOC-4. The data collected at 70% RTP was re-evaluated. The maximum deviation on the AxialPower Distribution was
-0.0769 and the RMS was 0.0233. All acceptance criteria for this measurement were met.
Peaking factor comparisons (percent difference from predictions) were as follows: Fzy Oe359%> Fr Oo'208%<
Fz Ool10%> and Fq 1o596%o AO parameters met the acceptance criteria.
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Stm'hip Report.'age 7 of8 Core Power Distribution Verification - 100% RTP This test is performed by obtaining a flux map from the Fixed Incore Detector System and processing this information with CECOR. The output from CECOR yields a full core map of Relative Power Density.
The maximum deviation obtained was 0.0697 and the minimum deviation was 0.0149. Allacceptance criteria for this measurement were met.
The second portion of testing at 98% RTP includes the verification ofthe AxialPower Distribution. This involves a comparison ofthe AxialShape through 51 nodes with predicted, and a Root Mean Square evaluation.
The AxialDeviation was -0.0901 Q 0.1) and the RMS was 0.0315 (g0.05).
Allacceptance criteria for this measurement were met.
Peaking factor comparisons (percent difference from predictions) were as follows: F~ -1.147%, Fr -0.072%,
F~ 1.746%,
and F< -1.231%. All parameters met the acceptance criteria.
Critical Boron Concentration - 100% RTP This test is performed at ARO HFP equilibrium conditions. A RCS Sample is taken and corrected to the nominal conditions which the prediction was calculated. The measured RCS concentration was 1019 ppm which was adjusted to 1013 ppm. The Design HZP ARO CBC was 1052 ppm. The measured value was within the acceptance criteria.
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Unit 1"Cycle 5
SCartup Repor'C'"'"'age 8 of 8 Cycle 5 Core Load Map T
S R
P N
M L
K I
H G
F E
D C
B A
17 241 240 PIE420 PIE429 PIE012 PIE003 PIE009 PIE412 PIE427 P2E110 PIE114 PIE018 PIG001 PIF521 PIC111 PIG004 PIE021 PIE107 P2E105 15 210 P2E114 PIE209 PIG103 221 PIFill 220 219 PIG215 PIF119 206 208 PIF401 PIG346 218 PIF512 217 PIE019 216 PIC219 PIC327 PIF501 215 PIF122 201 214 PIG208 PIC317 PIF416 2D PIF112 211 PIE210 197 196 PIGI06 P2E109 195 194 PIEIO9 PIF114 191 PIC302 189 PIG340 188 187 PIF307 PIG326 186 183 PIF517 PIG341 184 183 PIF403 PIG214 182 181 PIF109 PIE110 180
~ PIFA23 179 178 PIE001 PIG218 176 PIC333 PI F201 174 PIC322 PIC323 171 PIF531 170 PIC330 169 PIF203 167 166 165 PIC217 PIE022 PIFA15 163 11 ~ PIE419 146
~ PIE024 162 161 PIC008 PIFI23 145 144 PIF518 PIC209 PIC321 143 PIFSIS 159 142 PIC328 158 PIC311 141 140 PIFS32 PIC303 156 PIC305 139 PIF121 154 PIC304 138 137 PIF124 PIF103 152 PIC343 136 135 PIC307 PIF520 151 150 PIF530 PIG314 D4 133 PIC33S PIF511 149 PI F120 PIC003 132 131 PIC211 PIF522 147 PIFA28 129
~ PIE014 112
~ PIEOIO
~ PIE417 128 127 PIC107 PIE011 111 110 PIF503 PIC221 94 93 PIC007 PIF118 126 PIG331 PIC319 108 PIG345 91 PIFSI3 124 123 PIG318 PIF409 107 106 PIFS02 PIC316 PIC339 PIF301 106 PIFI06 PIC310 121 120 PIB122 PIFIOI 104 103 PIF116 PIF102 PIF413 PIC312 119 118 PIF412 PIG332 102 101 PIC301 PIF519 PIF302 PIC334 117 116 PIF308 PIG329 100 99 PIG347 PIF514 115 PIEOIS 81 PI F105 II4 ID PIE430 78
~ PIE422 77 76 PIE017 PIC216
'74 PIF202 PIG336 PIF523 69 PIG324 PIFSIO PIG325 PIF204 PIC337 PIF411 62 PIFA02 61 60 PIE112 PIF113 P2E107 PIG108 31 PIE211 PIC212 PIFIIS PIC342 PIF516 42 41 PIF41S PIC320 28 27 PIG222 PIF104 PIG213 PIF305 PIC338 39 38 PIG344 PIF527 25 24 PIE005 PIG220 82 51 PIF504 PIC315 37 36 PIC313 PIF410 PIF117 PIG210 50 49 PIF406 PIG206 PIC201 PIRM1 21 20 PIF110 PIGIIO 48 47 PIFI07 PIE106 PIC102 P2E112 19 PIE208 18 P2EIII 17 PIE116 16 15 PIE020 PIC005 14 PIF528 13 12 PIG112 PIF524 PIG002 10 PIE016 9
PIE118 P2E115
'7 6
PIE421 PIE432 5
PIE006 3
PIE013 PIE007 2
I PIE431 PIE418
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