task 2.3 thermal-hydraulic analysis of the lfr and etdr
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Task 2.3 Thermal-hydraulic analysis of the LFR and ETDR. Konstantin Mikityuk Paul Scherrer Institut. Task 2.3 Thermal-hydraulic analysis of the LFR and ETDR ( PSI , CIRTEN, NRG, SRS,UJV). - PowerPoint PPT PresentationTRANSCRIPT
Task 2.3 Thermal-hydraulic analysis of the LFR and ETDR
Konstantin MikityukPaul Scherrer Institut
Technical DocumentsT56 : Thermal-hydraulics assessment of the ETDR core (M24: April 2012)T62 : Thermal-hydraulics assessment of the LFR cores (M30: Oct 2012)
Goal: to assess thermal-hydraulic core performance for the defined core geometry and power distributions provided by task 2.1 and 2.2. The results will be feed-backed to the mentioned task in order to avoid hot spots in the core (cladding and fuel) and to allow a satisfying natural circulation in case of loss of flow.
Task 2.3 Thermal-hydraulic analysis of the LFR and ETDR (PSI, CIRTEN, NRG, SRS,UJV)
T56: Table of Content1 INTRODUCTION (PSI) 32 1D THERMAL-HYDRAULIC ANALYSIS OF THE CORE (PSI) 6 2.1 1D CORE MODEL 6 2.2 POWER DISTRIBUTION AND COOLING GROUPS 63 CFD ASSESSMENT OF GRID SPACER DESIGNS (NRG) 10 3.1 EFIT SPACER DESIGN 10 3.2 SRS SPACER DESIGN 17 3.3 COMPARISON: EFIT SPACER VS. SRS SPACER 23 3.4 CONCLUSIONS TO SECTION 3 244 CFD ASSESSMENT OF PRESSURE DROPS AT FA INLET AND OUTLET (SRS) 25 4.1 ALFRED FA PROPOSAL 25 4.2 PRESSURE DROP EVALUATION 27 4.3 CONCLUSIONS TO SECTION 4. 365 CFD ASSESSMENT OF PRESSURE DROPS ALONG BARE FUEL BUNDLE (UJV) 386 CFD ASSESSMENT OF ALFRED FA: A ONE-TWELFTH MODEL (POLIMI) 39 6.1 INTRODUCTION 39 6.2 ALFRED FUEL ASSEMBLY MODEL 39 6.3 SIMULATION RESULTS 42 6.4 CONCLUSIONS TO SECTION 6 597 CONCLUSIONS (PSI) 608 REFERENCES 61
TRACE/FRED model of the ALFRED core
56
110
170
2
16
34
58
88
112
133
100
73
46
25
5
17
15
33
57
87
111
153
134
101
74
47
26
12
6
14
32
86
152
135
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48
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13
30
31
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85
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171
163
136
102
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28
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53
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84
150
164
137
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50
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82
83
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149
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165
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103
78
79
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81
107
108
148
139
104
105
106
146
147
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141
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143
144
145
166
167
1683
8
17
35
59
89
113
132
99
72
45
24
11
4
9
18
36
60
114
131
71
44
23
10
20
19
37
61
90
115
154
162
130
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70
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21
39
38
62
116
155
161
129
69
42
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40
64
63
91
117
156
160
128
97
68
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96
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120
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159
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171 parallel 1D channels and 171 heat structures representing one fuel rod per SA
3 channels for bypasses -- between FAs; -- through reflector; and -- through CAs
BC on inlet coolant temperature (400C) and flowrate (25458 kg/s)
Power distribution in fuel assemblies and non-fuel regions, MW
Fuel assemblies 294.0Reflector assemblies 3.1Control assemblies 1.7Coolant in the gap between fuel assemblies 1.2Total 300.0
Power distribution (D7)
SA-wise power distribution over core radius (CEA)
0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 11 0 1 2 0 1 3 0 1 4 0R ad iu s , cm
0 .50 .60 .70 .80 .91 .01 .11 .21 .31 .41 .5
SA
pea
king
fac
tor
B O C 1E O C 1B O C 2E O C 2B O C 3E O C 3B O C 4E O C 4B O C 5E O C 5A v erag e
Power distribution (D7, Figs. 7-11) SA-wise power distribution and proposal for cooling groups (CEA)
0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 11 0 1 2 0 1 3 0 1 4 0 1 5 0 1 6 0 1 7 0 1 8 0S A n u m b e r
0 .6
0 .7
0 .8
0 .9
1 .0
1 .1
1 .2
1 .3
1 .4
SA
-wis
e po
wer
pea
king
fac
tor
CG1
CG2
CG3
CG4
0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 11 0 1 2 0 1 3 0 1 4 0R ad iu s , cm
0 .50 .60 .70 .80 .91 .01 .11 .21 .31 .41 .5
SA
pea
king
fac
tor
B O C 1E O C 1B O C 2E O C 2B O C 3E O C 3B O C 4E O C 4B O C 5E O C 5A v e rag e
Cooling groups Proposal for cooling groups
CG1 : 1 – 87CG2 : 88 – 111CG3 : 113 –117 120 – 125 127 – 132 134 – 139 141 – 146 148 – 153CG4 : 112, 119, 126, 133, 140, 147 154 – 171CG 5: 172CG 6: 173CG7: 174
56
110
170
2
16
34
58
88
112
133
100
73
46
25
5
17
15
33
57
87
111
153
134
101
74
47
26
12
6
14
32
86
152
135
75
48
27
13
30
31
55
85
151
171
163
136
102
76
49
28
29
53
54
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150
164
137
77
50
51
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82
83
109
149
169
165
138
103
78
79
80
81
107
108
148
139
104
105
106
146
147
140
141
142
143
144
145
166
167
1683
8
17
35
59
89
113
132
99
72
45
24
11
4
9
18
36
60
114
131
71
44
23
10
20
19
37
61
90
115
154
162
130
98
70
43
22
21
39
38
62
116
155
161
129
69
42
41
40
64
63
91
117
156
160
128
97
68
67
66
65
93
92
118
127
96
95
94
120
119
126
125
124
123
122
121
159
158
157
Outlet coolant temperatures TRACE results : 474 – 491 C. The maximum difference is ~17 C
0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 11 0 1 2 0 1 3 0 1 4 0 1 5 0 1 6 0 1 7 0 1 8 0S A n u m b er
4 7 4
4 7 5
4 7 6
4 7 7
4 7 8
4 7 9
4 8 0
4 8 1
4 8 2
4 8 3
4 8 4
4 8 5
4 8 6
4 8 7
4 8 8
4 8 9
4 9 0
4 9 1
Out
let c
oola
nt te
mpe
ratu
re (
C)
0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 1 1 0 1 2 0 1 3 0 1 4 0R ad iu s , cm
0 .50 .60 .70 .80 .91 .01 .11 .21 .31 .41 .5
SA
pea
king
fac
tor
B O C 1E O C 1B O C 2E O C 2B O C 3E O C 3B O C 4E O C 4B O C 5E O C 5A v erag e
0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 1 1 0 1 2 0 1 3 0 1 4 0R ad iu s , cm
0 .50 .60 .70 .80 .91 .01 .11 .21 .31 .41 .5
SA
pea
king
fac
tor
B O C 1E O C 1B O C 2E O C 2B O C 3E O C 3B O C 4E O C 4B O C 5E O C 5A v erag e
0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 1 0 0 11 0 1 2 0 1 3 0 1 4 0 1 5 0 1 6 0 1 7 0 1 8 0S A n u m b er
8 0
1 2 0
1 6 0
2 0 0
2 4 0
2 8 0
Coo
lant
flo
wra
te (
kg/s
)
C G 1
C G 2
C G 3
C G 4
R e flec to r
A ll C A s
B y p ass b tw F A s
Flowrate
Coolant flowrate distribution in the core, kg/s
Cooling group number
Average per channel
Averagetotal
1 FAs 172.3 149902 FAs 145.2 34843 FAs 117.5 42314 FAs 93.4 22415 Reflector 261 2616 Control assemblies 143 1437 Bypass between FAs 110 110
T62: LFR core thermal hydraulics
What is expected?
1D TH analysis of the core?