YAYOI nuclear reactor of the University of Tokyo (Model-12)
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[5]: TKY-M12 (YAYOI Model 12)   Experimental system
Filter: Fe(150mm), Fe(150mm), Fe(200mm), Bi(100mm), Fe(800mm). E(ave)=0.045 MeV, Gamma contamination (E=2.973 MeV)=14.3 % at Gy level
Materials: Human peripheral blood (whole blood irradiation): Irradiation at 150mm apart from the surface of the filter.
Date: 1992.06.20
Dose No. of Aberrations Distribution of cells with indicated number of aberrations
(Gy) cells Tet Tri Dic Rc Ra aM F del S del Aber 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0 500 0 0 1 0 0 1 1 0 0 0 Dics 499 1
D+R 499 1
All 498 2
0.324 400 0 0 8 1 2 1 10 2 10 9 Dics 392 8
D+R 389 11
All 381 15 4
0.089 300 0 0 20 4 2 4 24 2 14 13 Dics 281 18 1
D+R 276 22 2
All 262 31 7
0.1173 250 0 0 24 6 6 4 33 4 13 12 Dics 226 24
D+R 217 30 3
All 206 36 7 1
0.1402 250 0 2 35 6 4 8 46 5 11 8 Dics 216 29 5
D+R 207 37 6
All 193 45 11 1
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Ref: Sasaki, M. S., Nomura, T., Ejima, Y., Utsumi, H., Endo, S., Saito, I., Itoh, T. and Hoshi, M. (2008) Experimental derivation of relative biological effectiveness of A-bomb neutrons
in Hiroshima and Nagasaki and implication for risk assessment. Radiat. Res., 170:101-117.
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TKY-M12:      E=0.444 MeV,      Luence rate=1.891E+06 n/cm2/sec/kW,       Kerma=5.226E-04 rad/sec/kW,       Kerma/n=2.765E-10 rad