Energy From Thorium Discussion Forum

It is currently Feb 20, 2018 10:27 am

All times are UTC - 6 hours [ DST ]




Post new topic Reply to topic  [ 4 posts ] 
Author Message
PostPosted: May 04, 2013 5:34 am 
Offline

Joined: Jul 14, 2008 3:12 pm
Posts: 5057
Up to 4 new reactors are to be built in Turkey. Type is Atmea PWR, a fairly boring and overconventional design if you ask me but perhaps this makes it attractive.

http://www.world-nuclear-news.org/NN_Fi ... 05132.html

The cost is 22 billion for 4 reactors, so $5/Watt electric.

The design is very similar to the EPRs being built in Olkiluoto and Flamanville, and these are hideously cost-overrun.


Top
 Profile  
 
PostPosted: May 04, 2013 6:16 pm 
Offline
User avatar

Joined: Nov 30, 2006 9:18 pm
Posts: 1954
Location: Montreal
Like the EPR, the Atmea reactor includes a core catcher: Similar to dumping the fuel load in an MSR, except in this case you have to melt through an expensive pressure vessel first - a very costly type of "freeze plug" :lol:

Personally, I'd rather be dumping fluoride salt (or even metal) than oxides.


Top
 Profile  
 
PostPosted: May 04, 2013 9:18 pm 
Offline

Joined: Jun 05, 2011 6:59 pm
Posts: 1330
Location: NoOPWA
jaro wrote:
Like the EPR, the Atmea reactor includes a core catcher: Similar to dumping the fuel load in an MSR, except in this case you have to melt through an expensive pressure vessel first - a very costly type of "freeze plug" :lol:

Personally, I'd rather be dumping fluoride salt (or even metal) than oxides.
That would be an interesting modification to a LWR. Place a REAL freeze plug at the bottom of the PV and place boron lined catch cups on the floor below, catch cups with passive cooling. Well, maybe not... but then again.....

_________________
DRJ : Engineer - NAVSEA : (Retired)


Top
 Profile  
 
PostPosted: May 05, 2013 3:27 am 
Offline

Joined: Apr 19, 2008 1:06 am
Posts: 2239
With large stocks of fissile material present around, either as a result of reprocessing of used fuel or as surplus to weapons requirement, the fuel for thermal reactors should be a cermet of PuO2 ceramic in high melting metallic thorium. This will keep its shape even on drying of water by natural cooling.
A single capsule of such a fuel could be used as a thermal fuel candle by shifting the moderated core length upwards by filling lead at the bottom as some length of the candle is burnt. The neutrons going down will be reflected but some length towards the top will be irradiated and enriched with U-233. The whole capsule can be changed in a decade or two or three decades.
The water can be regularly fed as moderator-cum-coolant as in BWR as moderation falls and reactivity goes down. Lead filling and change of core levels just replaces the refueling. The spent fuel stays at bottom and continues to contribute the decay heat via lead. Conversion of some thorium to U-233 and burning in situ adds some candle effect.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC - 6 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group