Dear dont expect me to be your reactor engineering tutor. Its better if you do some study yourself.
As i said in my previous post, please read about indias FBR, its a classic example for any one who is in love with FBR design. If you dont find material online i promise i will send you a pdf file on your personal email. But please let us not test other people patience on this thread with our FBR "For -Against Debate."
And please don't consider my comments against FBR design as against india FBR reactor.
sir,with due respect,since you have failed to provide me with credible links,or even technical arguments stating the "flaws" or "inferiority of FBR vis-a-vis PWR",it is my turn to shed some light and take away your ignorance?
so here I begin
1) A breeder reactor is designed to create more fissile material (nuclear fuel) than it consumes. Depending on the Breeding Ratio of a reactor, it can produce new fuel at a greater or lesser rate. The Breeding Ratio represents the number of new fissile atoms created for each fission event. The theoretical upper limit for the Breeding Ratio is 1.8, while most breeder reactors are designed to produce just about as much fissile material as they consume.
The greatest advantage of FBR is after an initial loading of enriched U or Pu, it can thereafter be powered just by periodic loadings of unenriched (natural) uranium or thorium. Thorium is about four times more abundant in the Earth’s crust than uranium, poses very little weaponization risk, and produces nuclear waste which decreases in intensity to background levels much quicker than the waste from a conventional plant.
Breeder reactors can produce bomb-ready nuclear fuel, such as plutonium. This problem is addressed by a stage in nuclear preprocessing where other elements such as curium and neptunium are added in tiny quantities to the plutonium. This form of processing has no effect on the use of plutonium as a reactor fuel, but makes it extremely difficult to use the material to create an atomic bomb, even if utilizing a very sophisticated design.
2)sir,all conventional reactors have a burn up of about .5-.8(which means they produce about 50-80% of fissile material they consume),though the current trend is shifting towards manufacturing PWRs with very high burnups,they can never achieve the breeding ratios of a fast breeder reactor,infact in america,thanks to high burups of their reactor design,they are able to produce 1/3 of their total nuclear energy based on bred fissile material,so,in a way,FBR helps increase the productivity,it breeds enough fissile material for other reactors
indian has successfully mastered the 1st stage of breeder reactor(FAST breeder reactors) where initially a Pu loading is given in the core and the fuel cycles consists of subsequent loading of natural uranium,our 2nd stage is to design THERMAL fast breeder which sustains on only the subsequent fuel cycles of "thorium"(india's first experiemtal 45MWe FBR went critical in october 1985)
3)and FBR has a very distinct advantage in the sense that it also has the ability to process the radiotoxic wastes depending on the design of the reactor,In principle, breeder fuel cycles can recycle and consume all actinides, leaving only fission products. So, after several hundred years, the waste's radioactivity drops to the low level of the long-lived fission products. If the fuel reprocessing process used for the fuel cycle leaves actinides in its final waste stream, this advantage is reduced.(i mean subjected to the of presence of "breeding blanket" around the main fuel assembly)
4)now since you are a nuclear engineer,i assume your familiarity with the dwindling stock of uranium,infact as a matter of fact the thorium reserves are many times higher than those of uranium,it QUITE logical,that the whole world will have to look towards thorium based energy in near future
here are a few projects goin on in many countries
1)phenix and superphenix constructed by france(infact 1200MW SP is the world's largest FBR till now)
2)KNK-II of germany
3)indian FBR and later TFBR
4)british dounrey FBR
5)soviet BN-350 and BN-600
disadvantages-
here the coolant is liquid sodium,which means it cant be effectively used for naval propulsion,because a breach in the core would result in fire,and would spiral out of control,though FBRs,or TFBRs can be EFFECTIVELY USED in ground based platforms
sir,quite frankly,there aint any disadvantages of FBR,except itz cost,though that too would reduce as the newer technologies come in,AND THE SHEER ADVANTAGES OF A FBR HEAVILY OUTWEIGH ITZ cost-based "DISADVANTAGES"
in Pakistan we should use these bombs for achar really
