Table A-4

MAJOR WATER AND IMPURITY ACTIVATION PRODUCTS IN REACTOR COOLANT

Nuclide

Half-life

Reaction

Natural Isotopic Abundance (%)

Average Activation Cross Sectiona

3H

12.3 y

2H(n,α)3H

0.015

0.53 mb(T)

 

 

6Li(n,α)3H

7.5

942 b (F)

 

 

10B(n,2α)3H

5.6 mb (F)

 

 

10B(n,α)7Li

3838 b (F)

 

 

235U(n,f)3H

0.01% fy

14C

5730 y

13C(n,γ)14C

1.11

0.9 mb (T)b

 

 

14N(n,p)14C

99.63

1.8b(F)b

 

 

17O(n,α)14C

0.038

240 mb (F)b

15C

2.45s

18O(n,α)15C

0.204

1.5 mb (F)

13N

9.97 m

16O(p,α)13N

99.76

50 mb (P)c

16N

7.13 s

16O(n,p)16N

99.76

19 mb (F)

19O

26.9 s

18O(n,γ)19O

0.204

160 mb (T)

18F

1.83 h

18O(p,n)18F

0.204

300 mb (P)

24Na

14.96 h

23Na(n,γ)24N

100

528 mb (T)

32P

14.28 d

31P(n,γ)32P

100

190 mb (T)

 

 

32S(n,p)32P

95

69 mb (F)

38Cl

37.2 m

37Cl(n,γ)38Cl

24.23

430 mb (T)

(a)Data for 20°C; T, F, and P in the parentheses indicate thermal and fast neutron and proton reactions, respectively; the activation cross-section data are adopted from References 1 and 2.

(b)P.J.Magno, et al, Proc. 13th AEC Air Cleaning Conf., P1047 (1972).

(c)M.S.Singh and L.Ruby, Nucl. Tech., 17, 104 (1973).



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