The Monju experimental reactor in Tsuruga Explained

@daniel_garcia_r explains how the Monju reactor is not a ticking time bomb (as the New York Times makes out) but a key part of the Japan's R&D in nuclear energy supply.
Japan plutonium sodium tsuruga breeder Reactor NYT MONJU nuclear
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JasonBall_GoodPeople @good_people
WTF?: Japan Strains to Fix a Reactor Damaged Before Quake http://nyti.ms/iI0wfu
Hiroko Tabuchi @HirokoTabuchi
In Japan, Another Nuclear Reactor Tests Nation’s Will http://nyti.ms/j1nnLN Not my big story, but important.. w/ photographer @kosukeokahara
Daniel Garcia-R @dgr4energy
I'm really sick of reading the press, specially foreign. They are and a full blow campaign of JP diffamation and can't stand it
Daniel Garcia-R @dgr4energy
I work at Monju & there is nothing wrong with "react" nor "Sodium" & no "repeated (failed) attempts" to recover IVTM, but 2 Ops (now 2nd)
Daniel Garcia-R @dgr4energy
Monju is a prototype, and because of a design problem (which is why you build prototypes to begin with), we dropped IVTM past summer
Daniel Garcia-R @dgr4energy
Bc IVTM (InVesselTransferMachine) is very hard to access & JAEA very cautious after 1995, it has taken up to now to prepare 2nd removal op
Daniel Garcia-R @dgr4energy
Monju has fuel but was stopped for 15y & it's not even enough to power it up (IVTM drop happened when prep for refuel for 40% power test)
Daniel Garcia-R @dgr4energy
Monju 1995 acc was not "1 of most serious nuke acc", bc it was not a "nuke accident", & fire wasn't "devastating"→ repairs could've be fast
Daniel Garcia-R @dgr4energy
In 1995 there was a Na leak on a circuit w/o radioactive materials/sodium (hence "no nuke acc"), steaming from a sensor (not pipe failure)
Daniel Garcia-R @dgr4energy
Bc that circuit was not part of the nuclear side of NPP, leak monitoring wasn't enough, and detection took long→ high corrosion, big hole
Daniel Garcia-R @dgr4energy
Problem was authorities at the time tried to minimize it, said "nothing had happened"→ someone sent video to media→people show hole→scared
Daniel Garcia-R @dgr4energy
For ref, similar Sodium Fast Reactor (SFR) prototypes like Phénix reactor (FR) have had ~1 Na leak/year for 30y of op. = "success" in FR
Daniel Garcia-R @dgr4energy
In JP it has taken us 15 years to gain back people's confidence simply bc officials lied over a single minor problem with no rad involved
Daniel Garcia-R @dgr4energy
& btw, Na reacts strongly with H2O (&moisture), but it's also what allows us to build react with passive cooling+no pressure= greater safety
JasonBall_GoodPeople @good_people
@daniel_garcia_r Pltutonium, Uranium, flamible gas to cool it, toxic gas to keep that 'stable'... sounds like a bad idea for no rtn!
Daniel Garcia-R @dgr4energy
Of course there is plutonium, key point of FBR (Fast Bread Reactor) is to recycle nuke waste + burn nat Ur (without enrich)
Daniel Garcia-R @dgr4energy
Would you rather store the Pu produced by LWR (Light Water Reactors = regular PWR, BWR) in your backyard or burn it and get rid of it?
Daniel Garcia-R @dgr4energy
Would you rather store spent fuel Ur produced over decades of LWR operation in your backyard or burn them to get rid of them?
Daniel Garcia-R @dgr4energy
Would you rather try to find a way of storing highest rad waste (minor actinides) for x100,000 of years, or turn those into x100 years?
Daniel Garcia-R @dgr4energy
Btw, Na is flammable, but not gas, it's a liquid metal, which is why we have no presure at all, much lower (~0) risk of pipe failure
Daniel Garcia-R @dgr4energy
Btw, Argon is toxic, but used everywhere in science labs to keep innert atmospheres, it's pretty much stantandard industrial / r&d gas
Daniel Garcia-R @dgr4energy
SFR (Sodium Fast Reactors) actually sound like a terrific idea for any nuclear nation (FR, JP, Rusia, India, China, Korea) but one: the US
Daniel Garcia-R @dgr4energy
So yes, I'm pretty fed up with US propaganda; don't want SFR/FBRs? I'm fine, keep increasing garbage like you always do; let us be different
Daniel Garcia-R @dgr4energy
Bottom line: Monju not "a nuke reactor", but a "PROTOTYPE nuke reactor": when we finally start it, more problms will come, that's the point
Daniel Garcia-R @dgr4energy
At JAEA we don't "make reactors", we make R&D and one-of-a-kind facilities, no-one can predict exact schedules, troubles in advance
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