ACORN: a computer program for plotting fault trees. [In FORTRAN for CDC Cyber 74]

TRECII: a computer program for transportation risk assessment

“…TRECII uses a sequential search technique and Equation (2)(3) to locate isopleths, lines of constant concentration. Eleven isopleths are located; one represents the maximum concentration (minimum distance from the release and directly downwind) and the others represent incremental reductions in concentration.…”

“…is duration of inhalation exposure; (sec) E is time-integrated air concentration; (g-sec/cm 3 ). (2)(3)(4)(5) The time-integrated air concentration, E, is obtained from the atmospheric dispersion model discussed in Section 2.2.…”

“…Combining Equation (2)(3)(4) with Equation (2)(3)(4)(5) and normalizing the result to the quantity released yields: [2][3][4][5][6] The array of conversion factors, CNVl (discussed in Section 3.2.2), are values of K for individual isotopes. Note that the evaluation of these conversion factors is done external to TRECII and the factors themselves are considered input.…”

“…times the expected frequency of occurrence of the release sequence, where: = P _ P P P P (a) E jkim -k j/k ~/m m j is the atmospheric stability classification index k is the wind speed index ~ is the population density index in zone m of the U.S. m is the zone index for the shipping routes. (2)(3)(4)(5)(6)(7)(8) (a) P j / k should be read as the probability of index j given index k has occurred.…”

“…The default values for the IIp li in Equation (2)(3)(4)(5)(6)(7)(8) are obtained from the following tables in this section: P k - Table 1, Column 3 P j / k - Table 1, Columns 4-7 P £/m - Table 2 Pm - Table 2 By ~pecifying a value for j, k, ~, and m, one can obtain the expected . frequency that an environmental condition will be experienced during a shipment.…”