From: RST09 Hoc
Sent: Friday, April 01, 2011 12:33 AM
To: Lee, Richard
Cc: RST01 Hoc
Subject: TASKING FROM RST
Please find attached two documents from the site team in Japan. Tepco is planning to use a chemical “fix-it” to various surfaces at the site(building walls, ground, etc.) to prevent dispersion of contamination. The site team and the RST are concerned the material might end up in the spent fuel pools and cause potentially significant issues (with heat transfer, clogging, degradation of the material, etc.).
Additionally, find attached the assessment of this issue done by INPO.
ACTION: Please get the INPO recommendation peer reviewed (perhaps by Dana Powers or someone else that has been looking at the sump clogging issues), and provide peer review comments and recommendations, if any to RST by 1800, 1 April 2011 (EDT).
From: Powers, Dana A rmailto:dapowerbsandia.govl
Sent: Friday, April 01, 2011 11:43 AM
To: Lee, Richard
Subject: RE: TASKING FROM RST
Richard, I am not immediately finding information on Kuricoat. I think it a polyamide, but that is more guess than knowledge. I do know that there was extensive use of sprayed polymers at the Chernobyl site for exactly the same reason.
I think the overall experience with the polymer – I don’t know what was used – was positive.
Dose rates in the region of proposed spray will not adversely affect most polymers greatly – there will be some hydrogen production, but it will not be of great importance.
I am unaware of difficulties encountered in the Chernobyl operation with mechanical equipment in the vicinity of the sprayed material – robotic or otherwise.
There were great difficulties with robotics at Chernobyl but this had more to do With lack of radiation hardening of the electronics than any sprayed material.
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