Inventory charge calculations in the nuclear fuel cycle

IkTo make use of Eq. '.29), a method is needed for quickly estimating the effective inventory time t , which was defined by Eq. ( 36).By use or this equation, values of t were calculated for various values of exposure time, Interest raze, and lead or lag time.These values are tabulated in Table A-3 of Apptmiix A. 3.1 Use of F~xed Charge Rate to Calculate Changes in Fuel Cycle Cost Making use of the definitions of Lj. and t^, the change in U_ can be expressed in terms of the fixed charge rate Lp and the effective unrentory time t^ as follows: hr <*» *C " J r P r &t r> AU_ = ^ m g </ F f .(30) 10 ' 9 M Z ± <?/ ice vase soot ie^ree cf cccpleteness was desired in the developeer.t«.-f trie theory, the r.v*d>er cf er-*ticns pretested ir. the previous sections is rather lar.;e.Cs-ly % few cf these equiticns ire needed for sost ordinary applicatitns.Ir. * satheeatical sense, it s*y be said that only one setnod h*s beer.presented sine* all the equations shewn are sut-iaily consistent.JTcc a practical computational viewpoint, hcvever, the equa*-icr.srepresent several different scheres for calculating inven tory charges.The user »*y cheese atscn^ these as he sees fit, depending en what seces easiest and acst logical tc r.ir.Tc help the user saice this choice, the ex5Rj4.essraevr.ir.this section are designed to illustrate i variety cf possible eetheds.As a further aid, tne specific approach has teer.condensei ir.v a step-by-step procedure.and is s-rr arize i ir.table 5.1.This pr ir.-ccor..: ether procedures outlined ir. the preeeui:.^sections.>.i Kxicplcr '.'si.v;Kr.T,'C Vc-urteer.single-bate:; exacpl'-'S were ran by seans cf 8EFCC.Input iata are succiri;:-.-'iir."«-.blc 5.~.Ihe examples were barei on the licht water reactor fuel cycle.The costs an J ether quantities used are for purposes of illustration only, and are not intended to represent estirsates of current costs.The Irruts that were varied include the unit costs of the various operations, the lead and la.-timer of expenditures, and the interest rates rr.debt and equity.?robler.s 1C1 through 231 include property taxes and insurance; probier.s'_-? through ~V, do net.The ?.K?"0 outputs are suranarizei in Table ;>..-.A fuel cycle cost breakdown by components was obtained ir. each case, jirect costs ar.d carrying charges are shown separately.:le ~.i.A rcceiure :'cr the '-vLeulatie:.of I^ver.tcr^..*:iap; _ Usiru; t:ie r.azic ci* Indirect.Jest tc lirect "est' 1 '--•.ir.'jc-^r i:."er*r*.r^'e: » iit I -i___ .