By Christine L. Compston
This lecturers' consultant is designed to accompany Oxford's Pages from heritage sequence and starts off with the belief that the scholars who may be utilizing one of many volumes within the sequence have had very little event operating with fundamental resources. as well as taking a look at things like what a prime resource is and the result of educating with them, this teacher's advisor additionally comprises pattern classes.
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Additional info for A Teacher's Guide to Using Primary Sources (Pages from History)
The radiotoxicity of Th/Pu or U/Pu MOX from PWR is comparable with UOX fuelled MOX for the same fuel burnup. The reduction of radiotoxicity is possible only if the minor actinides are also extracted for incineration. In the ‘once-through’ thorium fuel cycle in thermal reactors, there is always a need of topping fissile material for extended burnup in order to get the maximum benefit from in-situ 233U. For this purpose, the best topping material is 233U as it would minimize formation of minor actinides.
Fast reactors In the fast neutron spectrum, 232Th is less fissile than 238U and has a higher fission threshold energy. In addition, the η value increases much less with energy for 233U than for 239Pu. 0 for multiple recycling of recovered thorium and uranium with or without other actinides. Thorium utilization has been investigated with the reference European fast reactor (EFR: 3 600 MWt, 1 450 MW(e)) and CAPRA cores. 96% 238Pu and the plutonium contained 2% 241Am. The EFR–like core contains axial (lower: 25 cm, upper: 15 cm) and radial (1 row of 78 assemblies) fertile 232Th blankets.
Moreover, the accelerator may provide a convenient control mechanism for sub-critical systems that would reduce (or even eliminate) the need of control rods. The sub-criticality itself adds an extra level of operational safety with regard to criticality insertion accidents. Among the various ADS concepts being studied, the principal ones are the (i) Energy Amplifier (EA) of the CERN Group proposed by Carlo Rubbia , (ii) the Waste Transmuter of Los Alamos National Laboratory advanced by Bowman , (iii) the ADS utilizing fast neutrons for incineration of higher actinides proposed at Brookhaven National Laboratory (Phoenix-project), now carried out in Japan as part of OMEGA programme  and (iv) the Russian accelerator driven technologies project .
A Teacher's Guide to Using Primary Sources (Pages from History) by Christine L. Compston