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Regional Basic Professional Training Course in Korea

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<strong>Regional</strong> <strong>Basic</strong> <strong>Professional</strong> <strong>Tra<strong>in</strong><strong>in</strong>g</strong> <strong>Course</strong> (BPTC) on Nuclear Safety<br />

Fig. (2.3) Radiation weight<strong>in</strong>g factor, wR, for neutrons versus neutron energy. In ICRP103, the<br />

factor for neutrons is now def<strong>in</strong>ed by a cont<strong>in</strong>uous function. The values are decreased <strong>in</strong><br />

low‐energy range.<br />

wR=<br />

⎧2.<br />

5<br />

⎪<br />

⎨5.<br />

0<br />

⎪<br />

⎪2.<br />

5<br />

⎩<br />

+ 18.<br />

2e<br />

+ 17.<br />

0e<br />

+ 3.<br />

25e<br />

2<br />

−[<br />

1n(<br />

En<br />

) ] / 6,<br />

2<br />

−[<br />

1n(<br />

2E<br />

n ) ] / 6,<br />

2<br />

−[<br />

1n(<br />

0.<br />

04 En<br />

) ] / 6,<br />

E<br />

n<br />

E<br />

< 1MeV<br />

1MeV<br />

≤ E ≤ 50MeV<br />

n<br />

> 50MeV<br />

S<strong>in</strong>ce many radiation fields consist of more than one component – for example, photons<br />

and neutrons with a range of energies – the overall equivalent dose is given by:<br />

❙ 66 ❙<br />

n<br />

HT= ∑ R<br />

R T R D W ,<br />

(2.1)

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