[Global] Dry Cask Storage question.

[Nolen, Jeffrey Lebron]

TVA is currently using the HOLTEC HI-STORM FW cask system.  I was looking into re-flooding the annulus after drying (FHD for us) to reduce the dose rate for closure welding.  The annulus area must be drained for FHD.  We're seeing unshielded contact dose rates of 2000 to 3500 mrem/hour.  Is anyone re-flooding the annulus area after completion of  drying?  If so what dose rate reduction are you seeing?

Joel Armstrong
ALARA Engineer
Spent Fuel Services
SQN Office (423) 843-7375
Mobile (423) 280-3417



Jeff Nolen [cid:image001.png at 01D50992.8609EBD0]
Tennessee Valley Authority
Sequoyah, ALARA Specialist
o.423/843-8252
c.423/991-9100
SQN SB-2A
[TVA logo]<http://www.tva.com/>


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