[ RadSafe ] [Bulk] Ft. Calhoun

[Thompson, Dewey L]

Ummm, well.  The reactor at Ft. Calhoun is reloaded with the next cycles fuel in the core.  They have been shut down since early April and will stay that way until the flooding subsides.  

What that means is that there is little concern for quick over heat of the core.  They DO have to keep the core cool, however this core has a LOT less decay heat in it than it did in April.  The pumps and diesels and such are in flood protected areas, and there is little danger of losing the diesel fuel tanks.  

Short answer to your question would be "slow temperature build up", Plant Operators would have time to activate backup plans. 

The berm that collapsed was for protection of the switchyard and site access.  The plant was designed around a 1014 sea level, the flood waters are right now at 1006 feet or so. They have isolated the transformers and are running diesels, although I expect they will reconnect off site power later.  Last projection I saw for river level was 1008 ft.  

Regards

Dewey



: : : : : : : : : : : : : : : : : : : : : : : : : 
DEWEY THOMPSON 
Staff HP
Radiation Protection Department
T 314.225.1061
F 573.676.4484
E DThompson3 at ameren.com

-----Original Message-----
From: radsafe-bounces at health.phys.iit.edu [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Tom Simpson
Sent: Monday, June 27, 2011 9:00 AM
To: The International Radiation Protection (Health Physics) Mailing List
Subject: Re: [ RadSafe ] [Bulk] Ft. Calhoun

Question to the list: with the current status of the reactor at Ft. 
Calhoun, , what would be the consequences of a total loss of power for 
coolant circulation, etc?

-Tom


On 06/27/2011 09:39 AM, Jeff Terry wrote:
> Been collapses at Ft. Calhoun.
> http://abcnews.go.com/m/story?id=13932406
>
> NRC activates incident response center. Flood at 1006 ft, design basis is 1014 ft. River expected to crest at 1008 ft.
>
> http://www.nrc.gov/reading-rm/doc-collections/news/2011/11-031.iv.pdf
>
> Jeff
>
>
> Sent from my iPhone
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