April 2nd, 2011 – Estimated 10-30%/daily drywell turnover leakage from failed penetrations – Please delete after reading

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From: Marksberry, Don
Sent: Saturday, April 02, 2011 12:23 PM
To: Tinkler, Charles; Helton, Donald; Esmaili, Hossein; Arndt, Steven; Schaperow, Jason; Salay, Michael
Cc: Drouin, Mary
Subject: New Status Info from 11:00 RST Call today (Saturday)

* Unit 1 – The Japanese estimated a 10 to 30% per day drywell turnover leakage; most likely from failed penetration(s). This info came from the Site Team during the 3:00 am call.

* Unit 1 – Concerning H2 and 02 concentrations:

o The Japanese estimates concentrations of 1-3% 02 and 1-12% H2 (no one knows how they came up with this estimate).

o GEH or EPRI (not sure who was talking) estimated concentrations of 8% 02 and 45% H2 Please delete after reading (since this is second or third hand information).

Thanks.

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