Table 8.

Suggested probability distributions and arithmetic means for the weathering half-life (T_w, d).^a

Element	Modeb	Minimum	Maximum	Arithmetic meanc
Growing vegetation
I	10	3	30	10.8
Cs	14	4	50	16.1
Sr	13	4	40	14.2
All others	15	4	60	17.8
Dormant vegetation
I	22	5	50	19.7
All others	30	8	100	32.9

^aAll distributions are log-triangular distributions (as plotted in logarithmic space) and are applicable for all plant types. Information sources included Martin (1965); Witherspoon and Taylor (1970); Heinemann and Vogt (1980); Simmonds and Linsley (1982); Millard et al. (1983); Miller and Hoffman (1983); Pinder and Doswell (1985); Pinder et al. (1987); Choi et al. (2002); IAEA (2009); Bengtsson et al. (2014).

^bParameter values are for the log-triangular distribution as plotted in logarithmic space.

^cThe arithmetic mean of the indicated distribution; this value can be used as a point estimate in deterministic assessments.