Japan Earthquake

Japan Earthquake | Page 1664

@radioguy Fuku's mox was delivered in 1999 and they have about a 6mo window between making it and it arriving.
by lillymunster 6/17/2011 2:28:10 AM

@dean No common pool, 1 reactor unit, 10 slots in cask storage. Let me go grab the brochure. The horse shoe building is just concrete.
by lillymunster 6/17/2011 2:28:56 AM

OPPD consumer brochure on the plant. Talks about the buildings www.oppd.com
by lillymunster 6/17/2011 2:30:28 AM

I saw it listed as the spent fuel holding site for all of the Nebraska NPPs. Is that correct?
by radioguy 6/17/2011 2:32:19 AM

• Initially upon removal from the reactor, used fuel is stored in a pool inside of the plant until it has cooled sufficiently to be safely stored in an air cooled Independent Spent Fuel Storage Installation (ISFSI).
by dean 6/17/2011 2:32:49 AM

This has links and photos related to calhoun's spent fuel also info on cooper station www.houseoffoust.com
by lillymunster 6/17/2011 2:33:20 AM

• The spent fuel pool is a reinforced concrete structure lined with stainless steel and has the capacity to hold 1083 fuel assemblies. The pool is full of boronated water and is cooled by a separate cooling and purification system to maintain normal water temperatures below 120°F.
• After assemblies have sufficiently been cooled and decay heat generation is minimized, the assemblies are then loaded into stainless steel canisters which hold a total of 32 spent fuel assemblies each. The canisters are then drained, vacuum dried and filled with an inert gas after seal welding redundant lids onto the top of the canisters.
• By use of an engineered cask transfer system, the canisters are then placed horizontally into concrete horizontal storage modules located within the protected area of the station, with concrete shield walls, concrete approach slabs, all built on an elevated basemat.
• The site is built to hold up to forty of the horizontal storage modules in rows of 20 each, back-to-back.
by dean 6/17/2011 2:33:33 AM

@radioguy Nope that is not correct. The link I just posted has all the info.
by lillymunster 6/17/2011 2:34:00 AM

So smoss's question again, since it's way down the scroll now: The Am-241 level in stored plutonium
increases about 0.5% per year, with corresponding decrease in fissile value of the plutonium. Does this decay of Pu241 continue while the MOX FAs sit in the SFP? If so, this becomes another issue with inserting old MOX into a reactor core (speaking of degredation of cladding as the other issue).
by radioguy 6/17/2011 2:34:49 AM

Nebraska has 2 NPP - Ft. Calhoun and Cooper Station. Both have their own spent fuel pool and cask storage on site. There is a 3rd reactor that is a medical reactor at the VA hosptial that is being decomissioned it is only a 20kw unit
by lillymunster 6/17/2011 2:34:56 AM

OK...cool. I wondered how they would move it about.
by radioguy 6/17/2011 2:35:07 AM

@radioguy Yes. That matches up with one of the documents found for another reactor that documented the percentage change to am-241. That fuel at that reactor only sat for IIRC 4 months and had a 15% conversion. Fuku's fuel sat for 10 years.
by lillymunster 6/17/2011 2:36:26 AM

@radioguy Hey I showered this morning! :-P
by lillymunster 6/17/2011 2:37:13 AM

@you heh... so that's once through the halflife. ~50% conversion.
by radioguy 6/17/2011 2:38:24 AM

@radioguy eep. What would that do to the fuel?
by lillymunster 6/17/2011 2:39:37 AM

that would be just the Pu-241 I guess, but still.
by radioguy 6/17/2011 2:39:58 AM

@radioguy I don't know what happens to the Am-241, does it stay in the fuel? If it does did it change how the fuel behaves?
by lillymunster 6/17/2011 2:42:23 AM

@lillymunster , that would lessen its burn value.
by Peter Melzer 6/17/2011 2:42:37 AM

So that long delay upped the half-life level of whatever the % of Pu-241 is by about 450 years before it even went in the reactor?

@Peter Melzer by how much, do you suppose when stored for 12 years?
by radioguy 6/17/2011 2:46:05 AM

How long would they have expected in life-span vs how much they'd get?
by radioguy 6/17/2011 2:46:55 AM

Radiation screening in high demand in Fukushima www.asahi.com
by Panserbjorne9 6/17/2011 2:48:10 AM

@lillymunster Yes, the atoms just change in place, Alchemy. Real alchemy. Real dangerous alchumy.
by radioguy 6/17/2011 2:48:30 AM

Lack of will on implementing Fukushima nuclear lessons www.thehindu.com
by Panserbjorne9 6/17/2011 2:49:24 AM

America's energy ethos: Do, regardless of harm www.sfgate.com
by Panserbjorne9 6/17/2011 2:50:32 AM

is my time for rest.. look forward to tomorrow .. lots more to research .. PEACE to all
by dean 6/17/2011 2:58:27 AM

Fukushima's emergency power failure traced to U.S. design
www.asahi.com
by Veenie 6/17/2011 3:02:10 AM

I just like to state, that they had 40 yrs to learn it, upgrade it AND they ALWAYS claimed to be THE Electronics Leader in the world.....so this REALLY pisses me off !!
by Veenie 6/17/2011 3:03:10 AM

@Veenie I wish they would be more accurate and put GE design. There were plenty of people pointing out the flaws in that reactor design in the US. WE didn't sell it to the Japanese. GE did.
by lillymunster 6/17/2011 3:05:45 AM

@radioguy Thanks! @lillymunster Do you happen to have the link on the other reactor? Can I find it on SIMPLYINFO?
by smoss 6/17/2011 3:10:18 AM

@lillymunster Yes, the one that documented the Pu 241 decay over a 4 month period.
by smoss 6/17/2011 3:12:16 AM

@smoss I probably have it in my notes, let me go look.
by lillymunster 6/17/2011 3:15:54 AM

@Veenie , I see this just as a lame attempt at passing the buck. It will lead nowhere. Most of their plants were built in collaboration with Toshiba.
by Peter Melzer 6/17/2011 3:32:43 AM