ML18187A190

NRC Comments Regarding Re-Calculation of the Maximum Potential Enrichment at the Cimarron Site

ML18187A190
Person / Time
Site:	07000925
Issue date:	07/05/2018
From:	Kenneth Kalman NRC/NMSS/DDUWP/MDB
To:	Lux J Burns & McDonnell
KKalman NMSS/DUWP/MDB 415.6664 T5C06
References
Download: ML18187A190 (1)

Text

From: Kalman, Kenneth To: NMSS_DUWP_Admin Resource

Subject:

FW: Re-calculation of maximum potential enrichment at the Cimarron site PLEASE ADD THIS EMAIL TO ADAMS Date: Thursday, July 05, 2018 1:55:15 PM Attachments: Form 665s.Recalc Cimm.doc From: Kalman, Kenneth Sent: Thursday, July 05, 2018 1:51 PM To: 'Lux, Jeff J' <jlux@burnsmcd.com>

Cc: Munson, Jeremy <Jeremy.Munson@nrc.gov>; Nelson, Robert <Robert.Nelson@nrc.gov>; Evans, Robert <Robert.Evans@nrc.gov>; Poston-Brown, Martha <Martha.Poston-Brown@nrc.gov>

Subject:

Re-calculation of maximum potential enrichment at the Cimarron site On April 18, 2018, Cimarron submitted a technical memorandum on the re-calculation of the maximum potential enrichment at the Cimarron site. This tech memo updated a 2015 tech memo, determining the maximum enrichment based on isotopic mass concentration instead of the previously calculated enrichment based on isotopic activity concentration. The tech memo concluded that because the previously calculated maximum enrichment value (which was used to demonstrate that criticality is not credible) was higher than the maximum enrichment calculated based on isotopic mass concentration, the previous criticality determination should still be considered to be bounding, and no additional nuclear criticality determination is needed.

NRC staff reviewed this submittal and has no objection to this approach.