ML112031112

E-mail from R. Guzman to J. Dosa - Follow-Up Information Completed EPU ATWS Simulator Testing Plots and Data Tables

ML112031112
Person / Time
Site:	Nine Mile Point
Issue date:	07/22/2011
From:	Richard Guzman Division of Operating Reactor Licensing
To:	Dosa J Nine Mile Point
Guzman R, NRR/DORL, 415-1030
References
TAC ME1476
Download: ML112031112 (1)

Text

From: Guzman, Richard Sent: Friday, July 22, 2011 3:57 PM To: Dosa, John J

Subject:

Follow-up Information request re: EPU ATWS Simulator Testing Plots and Data Tables

John, As we discussed, while the data provided by NMPNS in February 2011 supports the NRC staffs review of the proposed EPU with respect to thermal and hydraulic design, the staff has determined that clarifying information is necessary to support its completion of the draft safety evaluation (SE) for ACRS review. Specifically, for the MSIV closure and turbine trip EPU ATWS events, the staff notes that the licensee has provided the appropriate data for both ATWS events via CD copy dated February 2011; however, the staff requests the following information to conclude its review on thermal and hydraulic design. The information should be submitted formally on the docket as the staff intends to reference the supplement in its SE as well as for presentation during the ACRS briefings.

1) Provide the sequence of each event with indication of the corresponding ATWS emergency operating procedure action(s).

2) For clarity of the data tables for both the MSIV closure and turbine trip ATWS EPU events, provide the full name/nomenclature with description or definition of each column field (e.g., rrpdome, nmapmfx_z, fwsla101, etc.).

Thanks, Rich Guzman Sr. Project Manager NRR/DORL US NRC 301-415-1030 Richard.Guzman@nrc.gov