DESIGN DATA | FUEL REVIEW Mixing vaned mid grid (conformal spring & dimple for reducing fretting wear)
Inconel bottom grid for high burnup
Debris filtering bottom nozzle
Debris filtering protective grid Advanced fuel rod for high burnup Advanced cladding & guide tube material Low volume plenum spring Inconel grid for high burnup
Framatome HTP
8.7/11.5 15x15
-
205 20
3298/4179 215
2977/3860 10.75 11
9.13
10.55 - - -
M5/Duplex 0.725
Q12/HPA-4/ Alloy 718
- -
510/669
KWU-type plants 11.3/12.8
16x16 -
236 20
4182/4827 230
3845/4405 10.75 11
9.11
10.45 - - -
M5/Duplex 0.725
HPA-4/ Alloy 718
- -
740/846 12.8 18x18
300 24
8/10 14x14
Westinghouse-type plants 12
15x15
204 21
12 17x17
264 25
EPR 13.8
17x17
- ---- 179 17
4827 230
4405 9.5 9.8
8.05 10.45
2900/3476 197
2635/3209 10.75 11
9.33/9.11 10.4
4057 214
3863 10.77 10.4 9.06
10.52
4061 214
3866 9.5 10
8.19 10.52
265 24
4802 214
4550 9.5
13.5 8.19
10.52
- ---- - ---- - ----
M5 0.64
HPA-4/ Alloy 718
M5/Duplex 0.635 / 0.725
HPA-4/ Alloy 718
M5
0.76 Zy4/
Alloy 718 M5 0.57 Q12/ Alloy 718 M5 Fuel rods with gadolinia absorber 0.57 Q12/ Alloy 718 844
- ---- - ---- 484
660 678 Alloy 718 high burnup bottom grid 788 Westinghouse 17NGF Westinghouse Westinghouse CE
Standard Standard Modified System 80 14x14
16x16 176 16x16 236 16x16 236 NGF 16x16 236
Westinghouse Atom (KWU)
Standard Standard 16x16
18x18
------- 236
236
3994 207
55555 20 4491 207
4486 207
3733 11.18 11.58 9.68 10.47 20.34
4111 9.7
9.91 8.27
10.47 17.72
4111 9.7
9.91 8.27
10.47 *
4524 207
4112 9.7
9.91 8.27
10.47 18.37
4491 207
4129 9.5
9.83 8.19
10.47 19.03
4827 229.5 4425 10.75 11
9.11 M
300 24
4827 229.5 4422 9.5 9.7
8.05
96.05% 96.05% *
*
******* *******
Zirc-4/Zirlo Zirc-4/Zirlo 0.66
0.635
Zirc-4 *
596
Inconel/ Zirc-4
*
Zirlo 0.635
Inconel/ Zirlo
* 657
Zirc-4/Zirlo Optimized Zirlo
0.635
Inconel/ Zirc-4
* 649
Inconel/ Zirlo
* 642
Optimized Zirlo
Inconel/ Zirlo
78.2
***** 67 657
859
Optimized Zirlo
0.572 0.65 (min.) 0.59 (min.)
Inconel/ Zirlo
74.0/76.1 67
846-854
B P
M
Debris protection - Debris filter bottom nozzle (DFBN) - Inconel protective grid - Zirconium oxide protective coating
HMP spacer Lower tie plate M M
I I
M I I
M I
• Optimised Zirlo • Zirconium diboride (ZrB2 integral burnable absorber
) M5 fuel rods
Five intermediate flow mixers for enhanced heat transfer
Guide tubes T
Westinghouse integral nozzle (WIN)
Upper tie plate HMP spacer
Alloy 718 robust protective grid Stainless steel standardized debris filter bottom nozzle
Framatome GAIA-14 Zirlo intermediate flow mixer grids
Enusa 17x17 MAEF-2012 Hold down spring
Stainless steel removable integral top nozzle Alloy 718 top grid
Zirlo guide thimbles & instrumentation tube Optimized Zirlo/Zirlo fuel rods
Kepco Nuclear Fuel PLUS7 (see table PWR Design Data on page 22)
Reconstructable top nozzle
Zirlo RFA-02 LSR mid grid
GAIA mixing grid
www.neimagazine.com | September 2025 | 21
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