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D2O-moderated 233-UO2-ThO2 lattices (Th3-HW/BNLTD2O)

7.01) Th3-HW-BNLLaboratory: BNL Brookhaven National laboratory (USA)

Facility: BNL Exponential Assemblies

These benchmarks are eight D2O moderated subcritical lattices of 3% 233UO2 - 97%
ThO2 rods in hexagonal patterns. Material bucklings were measured.

Pitch (cm)

bnl_thd2o1: 2.170
bnl_thd2o2: 3.758
bnl_thd2o3: 4.338
bnl_thd2o4: 5.738
bnl_thd2o5: 6.507
bnl_thd2o6: 7.821
bnl_thd2o7: 8.462
bnl_thd2o8: 11.481

Lattice geometry

Hexagonal

Water/fuel volume ratio

bnl_thd2o1: 3.0047
bnl_thd2o2: 11.7159
bnl_thd2o3: 16.0505
bnl_thd2o4: 29.1127
bnl_thd2o5: 37.8276
bnl_thd2o6: 55.2258
bnl_thd2o7: 81.3123
bnl_thd2o8: 120.4907

Moderator

D2O

Fuel material

3w% 233UO2 97w% ThO2

Fuel Density (g/cm3)

8.9618

Radius of fuel rods (cm)

0.5461

Clad material

Zircaloy-2

Clad Density (g/cm3)

6.8365

Outer radius of clad (cm)

0.63373

Thickness of clad (cm)

0.08763

Temperature (K)

293

Experimental buckling
(1/cm2)

bnl_thd2o1: 0.002054 0.000020
bnl_thd2o2: 0.002985 0.000022
bnl_thd2o3: 0.002864 0.000029
bnl_thd2o4: 0.002500 0.000016
bnl_thd2o5: 0.002232 0.000014
bnl_thd2o6: 0.001913 0.000027
bnl_thd2o7: 0.001467 0.000037
bnl_thd2o8:-0.001129 0.000020

References

[1] SEHGAL, B.R., Brookhaven 233UO2-ThO2 Thermal Lattice Experiments Presented at
EACRP Tokyo Meeting, October 1967.

[2] WINDSOR, H.H., TUNNE, W.J., PRICE, G.A., Exponential Experiments with Lattices of
Uranium-233 Oxide and Thorium Oxide in Light and Heavy Water, Nucl.Sci.and
Engn.42,150-161 (1970).
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