Energy From Thorium Discussion Forum

It is currently Sep 22, 2018 4:38 am

All times are UTC - 6 hours [ DST ]




Post new topic Reply to topic  [ 38 posts ]  Go to page Previous  1, 2, 3
Author Message
PostPosted: Dec 30, 2013 4:20 am 
Offline

Joined: Apr 19, 2008 1:06 am
Posts: 2240
There is a Russian design of this type:-
http://www.gidropress.podolsk.ru/en/pro ... vbr100.php
It could possibly be scaled up to the size preferred. Various fuels could also be used so far as it remains a fast spectrum.


Top
 Profile  
 
PostPosted: Dec 30, 2013 4:20 am 
Offline

Joined: Apr 19, 2008 1:06 am
Posts: 2240
There is a Russian design of this type:-
http://www.gidropress.podolsk.ru/en/pro ... vbr100.php
It could possibly be scaled up to the size preferred. Various fuels could also be used so far as it remains a fast spectrum.


Top
 Profile  
 
PostPosted: Feb 24, 2014 5:01 am 
Offline

Joined: Feb 28, 2011 10:10 am
Posts: 354
I have a question about the LFR. What is the best way to mitigate solidification of lead in a LFR ? For example, during reactor maintenance the temperature of the molten lead has to be kept above 327 degree C. Heating elements might do the job, but this must be quite a challenge with tons of lead in the core. Solidification of lead can render such a reactor inoperable.


Top
 Profile  
 
PostPosted: Feb 25, 2014 3:27 am 
Offline

Joined: Jul 14, 2008 3:12 pm
Posts: 5045
camiel wrote:
I have a question about the LFR. What is the best way to mitigate solidification of lead in a LFR ? For example, during reactor maintenance the temperature of the molten lead has to be kept above 327 degree C. Heating elements might do the job, but this must be quite a challenge with tons of lead in the core. Solidification of lead can render such a reactor inoperable.


Pool type reactor. Lots of lead. And design it so that the outer layer of lead can freeze up, insulating the inner liquid lead near and inside the core.


Top
 Profile  
 
PostPosted: Feb 25, 2014 8:50 am 
Offline

Joined: Apr 19, 2008 1:06 am
Posts: 2240
There are low melting alloys of lead. Lead-Bismuth is used as coolant. There may be others of use.


Top
 Profile  
 
PostPosted: May 29, 2014 2:19 pm 
Offline

Joined: Dec 24, 2011 12:43 pm
Posts: 219
Location: Newport Beach, CA
jagdish wrote:
There are low melting alloys of lead. Lead-Bismuth is used as coolant. There may be others of use.


Lead-magnesium eutectic (Pb=97.7%, Mg=2.3%) looks interesting. It melts at 249C (between pure Pb and LBE), has better thermal conductivity, slightly better neutronics, less corrosive than LBE, but I think it also has a higher void coefficient.

Attachment:
lead alloy coolant properties.png
lead alloy coolant properties.png [ 24.28 KiB | Viewed 3120 times ]


OECD NEA study on LME


Top
 Profile  
 
PostPosted: May 29, 2014 7:49 pm 
Offline

Joined: Apr 19, 2008 1:06 am
Posts: 2240
Magnesium seems to make it better. Would it help further if Aluminium is added to the cocktail (alloy)?


Top
 Profile  
 
PostPosted: Aug 29, 2018 9:06 am 
Offline
User avatar

Joined: Jul 26, 2018 3:23 am
Posts: 27
Lead isotope Pb-208 seems to be the ultimate fast breeder reactor coolant.

Evgeny Kulikov et al.: Lead containing mainly isotope 208 Pb: New neutron moderator coolant and reflector for innovative nuclear reactors (PDF) CSVTS, 2011.

_________________
Transuranic heavy elements may not be used where there is life.
– Sapphire & Steel intro


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 38 posts ]  Go to page Previous  1, 2, 3

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:  
Powered by phpBB® Forum Software © phpBB Group