Correlated fission gas release model for fast reactor.

Spent fuel shipping cask accident evaluation

“…The factors F and F, are defined by Equations (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19), (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) and in action 1. The thermal capacity of the cask wall was computed as a volumeweighted average of the thermal capacities of steel and uranium.…”

“…This was the same procedure followed in Section 2.1.1.3.1. The factors F^ and F^ are defined by Equations (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19), (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20), and in Section 1.2, and the factor F by Equation in Section 2. 1.1.3.1.…”

“…Equivalent forms of Equations , (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19), (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20), , and…”

“…The calculated radioactivities of these fission gases are presented in Tables 3-5 and 3-6. The fraction of this inventory of fission gases that is expected to migrate to the fuel pin voids during operation and be available for release, if the clads burst, was calcu- (19) lated using the following equation^ ' exp (-6.84 x 10"^ B) 6.84 X 10"^ B ] 0.421 exp (0.05Q)J (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18) where f = the fractional release Q = the local linear heat rate, kw/ft B = the local burnup, MWD/MT.…”

“…The circumferential or hoop stresses in the cladding of the pins in the fuel nodes are presented as functions of time after impact and fire in The outside diameters of the clads and their thicknesses, t, are specified in Table 2 and Table 4, therefore, d. = d^ -2t . (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22) As an example, for the PWR fuel pin…”