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WWER-type UO2-H2O critical lattices (UO2-LB/WWER)

3.01) UO2-LB-CRIP ZR6

WWWER-type lattice criticality benchmarks

Laboratory: Central Research Institute for Physics of the Hungarian Academy
of Sciences, Budapest (Hungary)

Facility: ZR-6

These benchmarks are 25 regular WWER-type UO2-H2O lattices. Material bucklings
were measured. Lattices are identified by lattice pitch, atomic enrichment,
boron concentration and temperature.

Lattices are identified by a code, Pi/Wj/Bk/Tl, where
P: LATTICE PITCH [cm]
W: ATOMIC ENRICHMENT [at. %]
B: BORON CONCENTRATION [g H3BO3/l]
T: TEMPERATURE [C]
and the indices correspond to the following values:

Index 0 1 2 3 4 5 6 7
Values
P
  
1.10
1.27
1.50
1.905
      
W
  
1.6
3.6
4.4
        
B
0.0
0.64
1.0
1.41
1.85
4.0
5.8
7.2
T
  
21
80
130
        

 

Lattices identification and experimental bucklings.

P/W/B/T Lattice

WLUP Name Code Buckling
(1/m2)		 Deviation
(1/m2)
1.27/1.6/0.00/21
1.27/1.6/1.85/21
1.50/1.6/0.00/21
1.27/3.6/0.00/21
1.27/3.6/0.00/80
1.27/3.6/0.00/130
1.27/3.6/4.00/21
1.27/3.6/4.00/80
1.27/3.6/4.00/130
1.27/3.6/5.80/21
1.27/3.6/5.80/80
1.27/3.6/5.80/130
1.27/3.6/7.20/21
1.10/3.6/0.00/21
1.10/3.6/0.00/80
1.10/3.6/0.00/130
1.10/3.6/1.0/21
1.10/3.6/0.00/21
1.50/3.6/0.00/21
1.50/3.6/4.00/21
1.905/3.6/0.00/21
1.27/4.4/0.00/21
1.27/4.4/0.64/21
1.27/4.4/7.20/21
1.50/4.4/0.00/21
wwer_cra11
wwer_cra12
wwer_cra23
wwer_cra01
wwer_cra02
wwer_cra03
wwer_cra04
wwer_cra05
wwer_cra06
wwer_cra07
wwer_cra08
wwer_cra09
wwer_cra10
wwer_cra16
wwer_cra17
wwer_cra18
wwer_cra19
wwer_cra20
wwer_cra21
wwer_cra22
wwer_cra25
wwer_cra13
wwer_cra14
wwer_cra15
wwer_cra24
 p2w1b0t1
p2w1b4t1
p3w1b0t1
p2w2b0t1
p2w2b0t2
p2w2b0t3
p2w2b5t1
p2w2b5t2
p2w2b5t3
p2w2b6t1
p2w2b6t2
p2w2b6t3
p2w2b7t1
p1w2b0t1
p1w2b0t2
p1w2b0t3
p1w2b2t1
p1w2b3t1
p3w2b0t1
p3w2b5t1
p4w2b0t1
p2w3b0t1
p2w3b1t1
p2w3b7t1
p3w3b0t1
 50.57
33.32
48.90
100.41
96.55
90.27
74.16
72.07
67.63
64.95
61.69
59.02
56.54
66.01
64.02
59.76
62.14
61.70
120.36
70.25
108.20
112.58
106.60
69.03
136.80
1.15
1.30
0.65
0.40
1.29
0.91
0.34
0.21
0.20
0.26
0.20
0.13
0.39
0.47
0.49
0.31
0.62
0.53
0.65
0.81
1.56
1.65
1.84
1.06
0.64



 

 

 

 

 

 

 

 

 

Lattice geometry

Hexagonal

Moderator

H2O with different concentrations of H3BO3

Fuel material

UO2
Enrichment (at/o) 1.6, 3.6, 4.4
Fuel density (g/cm3)

1.6 %: 10.17
3.6 %: 10.28
4.4 %: 10.32
U-234 content (at/o)

1.6 %: 0.0102
3.6 %: 0.0351
4.4 %: 0.0344

Radius of fuel rods (cm)

0.3800

Clad material

Zr+1 w/o Nb (0.03 w/o Hf)
Clad density (g/cm3) 6.55

Outer radius of clad (cm)

0.4525

Thickness of clad (cm)

0.0650
Temperature (C) 21, 80, 130

 

 

 

 

 

 

 

 

 

 

References

[1] Final Report of TIC: Experimental Investigations of the Physical Properties of
WWER-Type Uranium-Water Lattices, Volume 1, Akademiai Kiado, Bupapest 1985

[2] Final Report of TIC: Experimental Investigations of the Physical Properties of
WWER-Type Uranium-Water Lattices, Volume 3, Akademiai Kiado, Bupapest 1991.

[3] NUCLEAR ENERGY AGENCY, THE VVER EXPERIMENTS: REGULAR AND
PERTURBED HEXAGONAL LATTICES OF LOW-ENRICHED UO 2 FUEL RODS IN
LIGHT WATER NEA/NSC/DOC/(95)03/IV, Volume IV, LEU-COMP-THERM-015,
International Handbook of Evaluated Criticality Safety Benchmark Experiments,
September 2001 Edition Nuclear Science Committee, Nuclear Energy Agency,
OECD (2001).
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