ML100840084
| ML100840084 | |
| Person / Time | |
|---|---|
| Site: | University of California - Irvine |
| Issue date: | 03/23/2010 |
| From: | Geoffrey Miller University of California - Irvine |
| To: | Geoffrey Miller, Cindy Montgomery Research and Test Reactors Licensing Branch, University of California - Irvine |
| MONTGOMERY C, NRR/DPR/PRLB 415-3398 | |
| References | |
| Download: ML100840084 (2) | |
Text
From: George Miller [gemiller@uci.edu]
Sent: Tuesday, March 23, 2010 3:06 PM To: Montgomery, Cindy; George Miller (gemiller@uci.edu)
Subject:
Correction to FAQ response submitted- Appendix F.
Ms Montgomery:
In UCI's recent submission to your RAI, I have reviewed the response, and realized that the thyroid exposure predicted for our MHA was over estimated in several ways.
In addition to not adjusting for a realistic operating schedule instead of "infinite operation at full power", we did not allow for any plating of iodine isotopes on surfaces that would significantly reduce the airborne concentration, and hence significantly reduce the anticipated thyroid exposure rate and hence the total calculated exposure.
In Oregon State University's SAR, they adopted a method which suggests halogen release plates out to reduce the airborne concentrations to less than 25% of the initial release.
Thus I wish to revise my dose rate expected to the thyroid in the unlikely event of a water "free" fuel element cladding rupture, to 0.25 x 0.45 rads/second = 0.11 rads/second .
Given this rate and the 2 minute evacuation time for personnel from the facility, the revised maximum dose would be 13.2 Rads to the thyroid.
I hope you can accept this late revision to provide a more realistic, but still very conservative estimate of potential exposure.
Thank you.
Regards.
E-mail Properties Mail Envelope Properties (4BA910FA.9090906)
Subject:
Correction to FAQ response submitted- Appendix F.
Sent Date: 3/23/2010 3:05:44 PM Received Date: 3/23/2010 3:05:44 PM From: George Miller Created By: gemiller@uci.edu Recipients:
Cindy.Montgomery@nrc.gov (Montgomery, Cindy)
Tracking Status: None gemiller@uci.edu (George Miller (gemiller@uci.edu))
Tracking Status: None Post Office:
uci.edu Files Size Date & Time MESSAGE 3625 3/23/2010
Options Expiration Date:
Priority: olImportanceNormal ReplyRequested: False Return Notification: False Sensitivity: olNormal Recipients received: