WIMS Library Update Project |
D2O-moderated uranium oxide critical lattices (UO2-HW/CRITD2O)
8.01)
UO2HW-AECLZED2
D2O-moderated uranium oxide critical lattices
Laboratory: AECL Atomic Energy of Canada Limited, Chalk River Nuclear Laboratories,
Chalk River, Ontario (Canada)
Facility: ZED-2 Numerous experiments with different fuel elements of CANDU
type
have been performed in the Canadian heavy water reactor ZED-2. They were made
using UO2 (natural) fuel on 37(a) and 28 hexagonal(b) and square(c) fuel clusters,
including buckling measurements and several parameters of the cells. Three of
these
experiments were selected:
a) Analysis of Experiments
with 37-rod Fuel clustersMeasurements have been
made at a single pitch 28.58 cm square, UO2 (natural) fuel, using heavy water
and air as coolants.
Pitch (cm) | 28.58 (square) |
Coolants | zed2t1d2o
: D2O zed2t1air : Air |
Moderator | D2O |
Number of rods | 37 (1/6/12/18) |
Radius of rod centers (cm) | 0.0/1.4885/2.8755/4.3305 |
Fuel material | UO2-nat |
Density of fuel material(g/cm3) | 10.50 |
Radius of fuel rods (cm) | Central:
0.5965 Others: 0.6050 |
Sheath material | Zry-4 |
Density of sheath material (g/cm3) | 6.55 |
Internal radius of sheath (cm) | 0.61 |
Thickness of sheath (cm) | 0.045 |
Material of pressure and calandria tubes | 1050 Al alloy |
Density
of pressure and calandria Tubes (g/cm3) |
2.7 |
Internal radius of pressure tube (cm) | 5.195 |
Thickness of pressure tube (cm) | 0.315 |
Internal radius of calandria tube (cm) | 6.35 |
Thickness of calandria tube (cm) | 0.32 |
Temperature (K) | 294.8 |
Experimental
buckling (1/cm^{2}) |
zed2t1d2o
: 0.00027 zed2t1air : 0.00020 |
Pitch (cm) | zed2t2p24:
24.0 zed2t2p40: 40.0 |
Lattice geometry | Hexagonal |
Coolant | D2O |
Moderator | D2O |
Number of rods | 28 (4/8/16) |
Radius of rod centres (cm) | 1.163/2.652/4.206 |
Fuel material | UO2-nat |
Density of fuel material (g/cm3) | 10.45 |
Radius of fuel rods (cm) | 0.71 |
Sheath material | Zry-2 |
Density of sheath material (g/cm3) | 6.55 |
Internal radius of sheath (cm) | 0.715 |
Thickness of sheath (cm) | 0.045 |
Material of pressure tube | 65s Al alloy |
Material of calandria tube | 50s Al alloy |
Density
of pressure and calandria tubes (g/cm3) |
2.7 |
Internal radius of pressure tube (cm) | 5.095 |
Thickness of pressure tube (cm) | 0.295 |
Internal radius of calandria tube (cm) | 6.23 |
Thickness of calandria tube (cm) | 0.14 |
Temperature (K) | 296.0 |
Experimental
buckling (1/cm^{2}) |
zed2t2p24:
0.0002804 zed2t2p40: 0.0002772 |
Pitch (cm) | 28.575 (square) |
Coolant | D2O |
Moderator | D2O |
Number of rods | 28 (4/8/16) |
Radius of rod centres (cm) | 1.163/2.652/4.206 |
Fuel material | UO2-nat |
Density of fuel material (g/cm3) | 10.0277 |
Radius of fuel rods (cm) | 0.7105 |
Sheath material | Zry-2 |
Density of sheath material (g/cm3) | 6.55 |
Internal radius of sheath (cm) | 0.7155 |
Thickness of sheath (cm) | 0.0454 |
Material of pressure tube | 65s Al alloy |
Material of calandria tube | 50s Al alloy |
Density
of pressure and calandria tubes (g/cm3) |
2.7 |
Internal radius of pressure tube (cm) | 5.0965 |
Thickness of pressure tube (cm) | 0.296 |
Internal radius of calandria tube (cm) | 6.23 |
Thickness of calandria tube (cm) | 0.139 |
Temperature (K) | 296.0 |
Experimental buckling (1/cm^{2}) | 0.000377 |
8.02)
UO2HW-JNCDIDCA
D2O-moderated uranium oxide critical lattices
Laboratory: Japan
Nuclear Cycle Development Institute (Japan)
Facility: DCA Deuterium Critical Assembly
DCA is a Japanese critical facility with 28 fuel elements of CANDU type.
The fuel is made of UO2 with slightly enriched uranium (1.2 w% U235).
Experiments were made including buckling measurements with different coolants:
heavy water, air and light water. Buckling measurements were performed at two
square lattice pitches of 22.5 and 25.0 cm.
Pitch (cm) | dcat1d22,a22,h22:
22.5 dcat1d25,a25,h25: 25.0 |
Lattice geometry | Square |
Coolants | dcat1d
: D2O dcat1a: Air dcat1h: H2O |
Moderator | D2O |
Number of rods | 28 (4/8/16) |
Radius of rod centres (cm) | 1.3125/3.0/4.7575 |
Fuel material | UO2-1.2w% |
Density of fuel material (g/cm3) | 10.36 |
Radius of fuel rods (cm) | 0.74 |
Sheath material | Al |
Density of sheath material (g/cm3) | 2.7 |
Internal radius of sheath (cm) | 0.7515 |
Thickness of sheath (cm) | 0.0850 |
Material of pressure and calandria tubes | Al |
Density of pressure and calandria tubes (g/cm3) | 2.7 |
Internal
radius of pressure tube (cm) |
5.84 |
Thickness
of pressure tube (cm) |
0.20 |
Internal radius of calandria tube (cm) | 6.625 |
Thickness
of calandria tube (cm) |
0.20 |
Temperature (K) | 295.15 |
Experimental
bucklings (1/cm^{2}) |
(1)
Void fraction: 87 %(99.82
atom % of D2O) dcat1d22(1): Br^{2}= 0.000247 Bz^{2}= 0.000766 dcat1a22(1): Br^{2}= 0.000236 Bz^{2}= 0.000647 dcat1h22(1): Br^{2}= 0.000247 Bz^{2}= 0.000859 (2) Void fraction: 70 %(88.88 atom % of D2O) dcat1d25(2): Br^{2}= 0.000247 Bz^{2}= 0.000781 dcat1a25(2): Br^{2}= 0.000231 Bz^{2}= 0.000725 dcat1h25(2): Br^{2}= 0.000245 Bz^{2}= 0.000727 |