Video of reactor 1 at Fukushima plant • Hacker News Board

Re: Video of reactor 1 at Fukushima plant

#81

Post by cosmicray » Sat, Mar 12, 2011, 1:34 PM UTC

hartror wrote: post #32

brg wrote: post #26

Can someone provide background information on the type of reactor at Fukusima, it's age, and it's failsafe mechanism. I was under the impression that no modern reactor would sustain criticality in the event of a failure.

From wikipedia: "Fukushima I – 1 BWR First criticality: March 26, 1971". So it isn't a "modern" reactor, not sure what the fail safes are but I have read from some sources all the fail safes are older generations which require power.

The Three Mile Island accident occurred on Wednesday, March 28, 1979. TMI Unit 2 received its operating license on February 8, 1978. So the Fukushima I appears to be slightly older than TMI.

Re: Video of reactor 1 at Fukushima plant

#82

Post by patrickgzill » Sat, Mar 12, 2011, 1:57 PM UTC

adrianN wrote: post #75

oemera wrote: post #50

Real quick, what does that mean for the rest of the world? Do we have to fear something?

No. Even if shit gets real and the reactor goes Chernobyl, Japan is sufficiently far away from the western world that it doesn't matter at all. People weren't concerned about radiation from the nukes in Bikini either.

Except the prevailing winds called the westerlies would put the radiation over California in a matter of days.

Re: Video of reactor 1 at Fukushima plant

#83

Post by brown9-2 » Sat, Mar 12, 2011, 2:05 PM UTC

Does anyone know what the flashing colors and lines separating regions on the map of Japan in the lower right of the screen represent?

Re: Video of reactor 1 at Fukushima plant

#84

Post by elliottcarlson » Sat, Mar 12, 2011, 2:07 PM UTC

brown9-2 wrote: post #83

Does anyone know what the flashing colors and lines separating regions on the map of Japan in the lower right of the screen represent?

Areas under Tsunami watch (I believe)...

Re: Video of reactor 1 at Fukushima plant

#85

Post by jensnockert » Sat, Mar 12, 2011, 2:09 PM UTC

jensnockert wrote: post #72

foobarbazetc wrote: post #69

http://twitter.com/#!/martyn_williams/status/465371589153914... The reactor DID NOT explode. HN is becoming a bit sensationalist today. Edit: http://en.wikipedia.org/wiki/Boiling_Water_Reactor_Safety_Sy... Basically, this bit: The reactor building (the shield wall/missile shield) is also made of steel-reinforced, pre-stressed concrete 0.3 m to 1 m (1–3 feet) thick. The concrete surrounding the building is now gone (d…

While damage to internal containment structures are possible, the building is likely to be resistant to these kinds of explosions. A (what I guess) is a similar explosion happened in the reactor building in TMI, and the risk of an explosion such as this seems to be well known. The reactor building was probably prepared to absorb the explosion away from the containment structures, making it look much worse than it is.

Someone has compiled information about the structure of the reactor in question.

http://uvdiv.blogspot.com/2011/03/some-links-on-fukushima-da...

Re: Video of reactor 1 at Fukushima plant

#86

Post by jensnockert » Sat, Mar 12, 2011, 2:18 PM UTC

jensnockert wrote: post #78

Got a mail from WANO relayed to me, below is the interesting part about the explosion. ----- 1. Hydrogen explosion occurred at 15:36 between containment and reactor building of Fukushima Daiichi unit 1. Walls of reactor building were blown out or damaged. 2. It was confirmed that unit 1 containment integrity was maintained. Explosion was not inside the containment as it is inert. 3. Radiation level at the Fukushima D…

WNN (http://www.world-nuclear-news.org/RS_Battle_to_stabilise_ear...) was updated with news that the sea water injection has started.

Re: Video of reactor 1 at Fukushima plant

#87

Post by dablue » Sat, Mar 12, 2011, 2:24 PM UTC

Know why Japan is now clearing all this up now?

Cuz the USA offered to send emergency help.

Imagine the USA team going over and finding nothing really happened, an entire hoax.

This bombing was crafted to short the stock markets.

It's pitiful what the rich do for their market gains.

Re: Video of reactor 1 at Fukushima plant

#88

Post by mistermann » Sat, Mar 12, 2011, 2:26 PM UTC

buro9 wrote: post #62

LogicHoleFlaw wrote: post #55

Earlier quoted context omitted.

Well, the radius was doubled. The affected land area quadrupled.

Area of a 10km circle is 314 km2 Area of a 20km circle is 1257 km2 Assuming they go to 30km or 50km next: Area of a 30km circle is 2827 km2 Area of a 50km circle is 7854 km2

I have a feeling most people on HN know how to calculate the area of a circle. ;)

Re: Video of reactor 1 at Fukushima plant

#89

Post by by » Sat, Mar 12, 2011, 2:32 PM UTC

oemera wrote: post #50

Real quick, what does that mean for the rest of the world? Do we have to fear something?

The things we should fear are myocardial infarction [1] and cerebrovascular accident [2]. These are what will probably kill us in developed countries [3]. The good news is that we know how to prevent many of these deaths: regular exercise, not over-eating, not smoking and moderation in alcohol and drug consumption. Other causes of death and ill-health are also reduced by these actions.

[1] http://en.wikipedia.org/wiki/Myocardial_infarction [2] http://en.wikipedia.org/wiki/Stroke [3] http://en.wikipedia.org/wiki/List_of_causes_of_death_by_rate...

Re: Video of reactor 1 at Fukushima plant

#90

Post by Retric » Sat, Mar 12, 2011, 2:45 PM UTC

mistermann wrote: post #88

buro9 wrote: post #62

Earlier quoted context omitted.

Area of a 10km circle is 314 km2 Area of a 20km circle is 1257 km2 Assuming they go to 30km or 50km next: Area of a 30km circle is 2827 km2 Area of a 50km circle is 7854 km2

I have a feeling most people on HN know how to calculate the area of a circle. ;)

True, but calculating the land area by doing so is a mistake because ~50% of that 20KM circle is over the ocean. http://maps.google.com/maps?hl=en&biw=864&bih=471&#3...