Projets

Grandeurs Limite de libéra- Limite d’autori-Valeurs directrices

d’appréciation tion sation

Nucléide Période Mode de désinté-einh eing h10 h0,07 hc0,07 LL LA CA CS Nucléide de

gration / rayon- Sv/Bq Sv/Bq (mSv/h)/G (mSv/h)/GBq à (mSv/h)/ Bq/g Bq Bq/m3 Bq/cm2 filiation instable nement Bq à 1 m 10 cm de (kBq/cm2)

de distance

distance

1 2  4 5 6 7 8 9 10 11 1213

Ac-225 10.0 d  / ph 6.50E-06 2.40E-08 0.005 20 0.1 1.E+01 [2] 9.00E+02 1.00E+00 10  Fr-221 etc. Ac-226 29.37 h ^, ec,  / ph 1.00E-06 1.00E-08 0.024 1000 1.3 1.E+02 [2] 6.00E+03 8.00E+00 3  Th-226, Ra-226,

Fr-222 Ac-227 21.772 a ^,  / ph 6.30E-04 1.10E-06 <0.001 <1 <0.1 1.E-02 [2] 1.00E+01 1.00E-02 0.1  Th-227, Fr-223 Ac-228 6.15 h ^/ ph 2.90E-08 4.30E-10 0.145 2000 1.8 1.E+01 [1] 2.00E+05 3.00E+02 3  Th-228 Th-226 30.57 min  / ph 7.80E-08 3.60E-10 0.002 100 0.3 1.E+03 [1] 8.00E+04 1.00E+02 30  Ra-222 etc. Th-227 18.68 d  / ph 7.60E-06 8.90E-09 0.023 200 0.2 1.E+01 8.00E+02 1.00E+00 10  Ra-223 Th-228 1.9116 a  / ph 3.20E-05 7.00E-08 0.002 3 <0.1 1.E-01 [2] 2.00E+02 3.00E-01 3  Ra-224 Th-229 7.34 E3 a  / ph 6.90E-05 4.80E-07 0.027 300 0.5 1.E-01 [2] 9.00E+01 1.00E-01 0.3  Ra-225 Th-230 7.538 E4 a  / ph 2.80E-05 2.10E-07 0.001 3 <0.1 1.E-01 2.00E+02 3.00E-01 1  Ra-226 Th-231 25.52 h ^/ ph 4.00E-10 3.40E-10 0.019 700 0.8 1.E+03 2.00E+07 2.00E+04 10  Pa-231 Th-232 1.405 E10 a  / ph 2.90E-05 2.20E-07 0.001 3 <0.1 1.E-01 [2] 2.00E+02 3.00E-01 1  Ra-228 Th-234 / Pa-234m 24.10 d ^/ ph 5.80E-09 3.40E-09 0.008 1000 1.9 1.E+02 [2] 1.00E+06 1.00E+03 3  Pa-234

Th nat (+ filles) 0.355 6000 5.4 voir an-1

nexe 2

Pa-227 38.3 min , ec / ph 9.70E-08 4.50E-10 0.007 5 <0.1 1.E+01 [1] 6.00E+04 9.00E+01 300  Ac-223 Pa-228 22 h ec, ^,  / ph 5.10E-08 7.80E-10 0.168 400 0.9 1.E+01 1.00E+05 2.00E+02 10  Th-228, Ac-224 Pa-230 17.4 d ec, ^,  / ph 5.70E-07 9.20E-10 0.108 200 0.3 1.E+01 1.00E+04 1.00E+01 30  Th-230, U-230,

Ac-226 Pa-231 3.276 E4 a  / ph 8.90E-05 7.10E-07 0.020 40 0.1 1.E-02 7.00E+01 9.00E-02 0.3  Ac-227 Pa-232 1.31 d ^, ec / ph 6.80E-09 7.20E-10 0.151 1000 1.3 1.E+01 9.00E+05 1.00E+03 3  U-232 Pa-233 26.967 d ^/ ph 3.20E-09 8.70E-10 0.041 2000 1.4 1.E+01 2.00E+06 3.00E+03 3  U-233 Pa-234 6.70 h ^/ ph 5.80E-10 5.10E-10 0.281 2000 2.9 1.E+01 1.00E+07 1.00E+04 3  U-234 U-230 20.8 d  / ph 1.20E-05 5.50E-08 0.003 6 <0.1 1.E+01 [2] 5.00E+02 7.00E-01 3  Th-226 U-231 4.2 d ec,  / ph 4.00E-10 2.80E-10 0.032 10 0.1 1.E+02 2.00E+07 2.00E+04 100  Pa-231, Th-227 U-232 68.9 a  / ph 2.60E-05 3.30E-07 0.002 6 <0.1 1.E-01 [2] 2.00E+02 3.00E-01 1  Th-228 U-233 1.592 E5 a  / ph 6.90E-06 5.00E-08 0.001 2 <0.1 1.E+00 9.00E+02 1.00E+00 3  Th-229 U-234 2.455 E5 a  / ph 6.80E-06 4.90E-08 0.002 3 <0.1 1.E+00 9.00E+02 1.00E+00 3  Th-230 U-235 7.04 E8 a  / ph 6.10E-06 4.60E-08 0.028 100 0.2 1.E+00 [2] 1.00E+03 1.00E+00 3  Th-231 U-236 2.342E7 a  / ph 6.30E-06 4.60E-08 0.002 1 <0.1 1.E+01 [1] 1.00E+03 1.00E+00 3  Th-232