By Erich R. Merz (auth.), Erich R. Merz, Carl E. Walter (eds.)
A survey of modern advancements within the box of plutonium disposal by means of the applying of complex nuclear structures, either serious and subcritical. present nationwide R&D plans are summarized. The actinide-fuelled serious reactors are linked to regulate difficulties, given that they generally tend to have a small not on time neutron fraction coupled with a small Doppler impact and a favorable void coefficient. present considering is popping to accelerator-driven subcritical platforms for the transmutation of actinides.
The book's end is that some of the structures proposed are technically possible, even if now not but technically mature. The booklet provides a distinct precis and evaluate of all suitable percentages for burning surplus plutonium, provided by way of specialists from a number of various disciplines and pursuits, together with the defence institution. the most obvious factor - the non-proliferation of nuclear guns - is key, however the topic represents a posh technological problem that still calls for an review in financial terms.
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Extra info for Advanced Nuclear Systems Consuming Excess Plutonium
These investigations were based on simplified lattice calculations . 7% if about 50 GWD / T HM discharge burnup should be reached with natural or dep leted uranium in the MOX. With such plutonium fractions in the MOX fuel it cannot be guaranteed, that the CDRC remains satisfactory. Starting from this experience, in reference 2 whole core calculations for pools of PWRs with full VOX and full MOX cores have been performed. In figure 1 the principle of this reactor scenario is shown. GJ GJ Figure 1: Scenario for plutonium mu lti-recycling in a pool of PWRs.
49. 6367 Tab le 6: CAPRA cores 04/94 with N p02- and BlIC-addition . An inev itable disadvantage of the addition of N p237 to the MOX fuel is t he considerable amount of Pu 238 produced during irradiati on. 10% if the percentage of PU238 in the unloaded fuel shou ld not exceed about 10% of the total plutonium, an amount which might require extra precautions in reprocessing this Pu 238-loaded fuel. 'T rc 8.... ,. ~ ---. '"'0 ;p (") i:l s (0 it' .... , Ul ;:;e-e-. (0 e-e- ~ ~ • <19 Outer core Inner core ~\ esc •«+ >.
At the condition of strict control inside one or a few closed nuclear centers any attempt of diversion of fissile materials for weaponry must be resulted in stopping the International control and so will be inevitably fixed. 6. CONCLUSION I. Russian concept of plutonium management is based on closed nuclear fuel cycle. No problems exist while plutonium of various isotopic composition including ex-weapons plutonium being utilized in fast power reactors . Presently the BN-800 fast reactor design due to both inherent features and additional technical adjustments meets up-to-date safety requirements for the new generation of NPPs with improved safety.