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lead core
The lead-cooled fast reactor is a nuclear reactor design that features a fast neutron spectrum and molten lead or lead-bismuth eutectic coolant.
Molten lead or lead-bismuth eutectic can be used as the primary coolant because especially lead, and to a lesser degree bismuth have low neutron absorption and relatively low melting points.
Neutrons are slowed less by interaction with these heavy nuclei (thus not being neutron moderators) and therefore, help make this type of reactor a fast-neutron reactor. In simple terms, if a neutron hits a particle with a similar mass (such as hydrogen in a Pressurized Water Reactor PWR), it tends to lose kinetic energy. In contrast, if it hits a much heavier atom such as lead, the neutron will "bounce off" without losing this energy.
The coolant does, however, serve as a neutron reflector, returning some escaping neutrons to the core.
Fuel designs being explored for this reactor scheme include fertile uranium as a metal, metal oxide or metal nitride.
Smaller capacity lead-cooled fast reactors (such as SSTAR) can be cooled by natural convection, while larger designs (such as ELSY) use forced circulation in normal power operation, but will employ natural circulation emergency cooling. No operator interference is required, nor pumping of any kind to cool the residual heat of the reactor after shutdown.
The reactor outlet coolant temperature is typically in the range of 500 to 600 °C, possibly ranging over 800 °C with advanced materials for later designs.
Temperatures higher than 800 °C are theoretically high enough to support thermochemical production of hydrogen through the sulfur-iodine cycle, although this has not been demonstrated.
The concept is generally very similar to sodium-cooled fast reactor, and most liquid-metal fast reactors have used sodium instead of lead.
Few lead-cooled reactors have been constructed, except for some Soviet nuclear submarine reactors in the 1970s, but a number of proposed and one in construction new nuclear reactor designs are lead-cooled.
The lead-cooled reactor design has been proposed as a generation IV reactor.
Plans for future implementation of this type of reactor include modular arrangements rated at 300 to 400 MWe, and a large monolithic plant rated at 1,200 MWe.
Pictured Chinese mfg ammo, imported during the 90s I believe. Just over 700 rounds total, one box of Wolf not pictured. 300+ rounds loose, the rest in boxes as pictured.
In Albany
May trade for 300blk subsonic, 9mm 147gr, decent optics, send list.
New 2x 500 round bags. Great running suppressed & easy on steel plates due to lead core. Sealed primers. Stored in air tight container with desiccants.
Can split but would prefer to sell both together.
$250 per 500 round pack. $480 if you take both.
500 rds of 5.56 Magtech 62gr lead core, brass cased for $225. Lowered price 1/14/24 and revised ad.
The slightly heavier bullet weight works well in shorter barrels and faster twist barrels.
I can meet around town and to Albany.