Post Irradiation Examination for the Spent Fuel Samples

Fukushima-Daiichi-3


Outline of Reactor and Post Irradiation Examination

Fukushima-Daiich-3 is BWR in Japan. Fuel Assembly is 8 by 8 type. From seven fuel assemblies, F3A1, F3A3, F3A5, F3A6, F3A7, F3A8, F3A9, 36 spent fuel samples were taken for the measurement of isotopic composition. The measurement was conducted in Japan Nuclear Fuel Development(NFD) under the auspices of Nuclear Power Engineering Corporation (NUPEC).

Main parameters of reactor

 

Reactor Name Fukushima Daiichi-3
Type of Reactor
BWR
Power
784 MWe
Initial U235 Enrichment (%)
1.45/1.87/2.22/3.01
Operation
1977-1982
Fuel Pin Fuel Pellet Diameter (mm)
11
Length of Pellet Stack in Fuel Rods (mm)
3658
Clad Thickness (mm)
0.86
Clad Material
Zry-2
Fuel Assembly Rod Array
8*8
Number of Rods
63
Fuel Rod Pitch (mm)
16.3
Control Rod Absorbing Material
-
Core Equivalent Diameter (mm)
-
Active Height (mm)
-
Number of Assembly
548
Inlet Temp (deg.)
-
Outlet Temp (deg.)
-

 

Operation History

 

Assembly
Burn-up [MWd/t]
1st Cycle
2nd Cycle
3rd Cycle
4th Cycle
F3A5
5800
-
-
-
F3A8
6100
-
-
-
F3A1
5400
14500
-
-
F3A6
5800
13800
-
-
F3A7
5600
14300
21300
-
F3A3
5500
14000
21100
28600
F3A9
5600
14300
20300
26100
F3A2
5700
13900
20300
27100
F3A4
5800
13300
19000
25900
F3A10
5600
15000
21000
28000

 

 

Spent Fuel Composition Data

 

Sample ID
Type
U-235
Entichment[%]
Burn up (GWd/t)
Sampling Position
Assembly
Pin
JPN1F3BWR-1 UO2
1.45
19.20
JPN1F3BWR-2 UO2
1.45
15.74
JPN1F3BWR-3 UO2
3.01
14.69
JPN1F3BWR-4 UO2
3.01
15.94
JPN1F3BWR-5 UO2-Gd2O3
3.01
13.92
JPN1F3BWR-6 UO2-Gd2O3
3.01
14.59
JPN1F3BWR-7 UO2
1.45
29.47
JPN1F3BWR-8 UO2
1.45
33.60
JPN1F3BWR-9 UO2-Gd2O3
3.01
28.13
JPN1F3BWR-10 UO2-Gd2O3
3.01
27.46
JPN1F3BWR-11 UO2
1.87
27.46
JPN1F3BWR-12 UO2
1.87
26.50
JPN1F3BWR-13 UO2
1.45
7.92
JPN1F3BWR-14 UO2
1.45
6.15
JPN1F3BWR-15 UO2
3.01
7.44
JPN1F3BWR-16 UO2
3.01
5.85
JPN1F3BWR-17 UO2-Gd2O3
3.01
5.59
JPN1F3BWR-18 UO2-Gd2O3
3.01
4.24
JPN1F3BWR-19 UO2
1.45
17.57
JPN1F3BWR-20 UO2
1.45
18.14
JPN1F3BWR-21 UO2
1.45
24.38
JPN1F3BWR-22 UO2
1.45
25.82
JPN1F3BWR-23 UO2
3.01
21.89
JPN1F3BWR-24 UO2
3.01
18.53
JPN1F3BWR-25 UO2-Gd2O3
3.01
21.98
JPN1F3BWR-26 UO2-Gd2O3
3.01
20.35
JPN1F3BWR-27 UO2
1.45
6.86
JPN1F3BWR-28 UO2
1.45
5.25
JPN1F3BWR-29 UO2
3.01
7.19
JPN1F3BWR-30 UO2
3.01
5.04
JPN1F3BWR-31 UO2-Gd2O3
3.01
5.75
JPN1F3BWR-32 UO2-Gd2O3
3.01
4.14
JPN1F3BWR-33 UO2
3.01
30.91
JPN1F3BWR-34 UO2
3.01
32.45
JPN1F3BWR-35 UO2
1.87
31.49
JPN1F3BWR-36 UO2
1.87
31.30

 

 

Core Configuration and Assembly Shuffling Information

 

No. Assemblies No. Assemblies
1 F3A1 6 F3A6
2 F3A2 7 F3A7
3 F3A3 8 F3A8
4 F3A4 9 F3A9
5 F3A5 10 F3A10

 

References

  1. Kurosawa,M., Naito,Y., Sakamoto,H., and Kaneko,T., "The Isotopic Compositions Database System on Spent Fuels in Light Water Reactors(SFCOMPO)," JAERI-Data/Code 96-036, Japan Atomic Energy Research Institute (February 1997).

Last reviewed: 20 March 2012