ML020360342

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Memo Email Transmission Issues to Be Discussed in an Upcoming Conference Call (Tac No. MB3708)
ML020360342
Person / Time
Site: Limerick Constellation icon.png
Issue date: 02/07/2002
From: Gratton C
NRC/NRR/DLPM/LPD1
To: Clifford J
NRC/NRR/DLPM/LPD1
Gratton C, NRR/DLPM 415-1055
References
TAC MB3708
Download: ML020360342 (3)


Text

February 7, 2002 MEMORANDUM TO: James W. Clifford, Chief, Section 2 Project Directorate 1 Division of Licensing Project Management Office of Nuclear Reactor Regulation FROM: Christopher Gratton, Sr. Project Manager, Section 2 Project Directorate 1 /RA/

Division of Licensing Project Management Office of Nuclear Reactor Regulation

SUBJECT:

LIMERICK GENERATING STATION (LGS), UNIT 1, EMAIL TRANSMISSION, ISSUES TO BE DISCUSSED IN AN UPCOMING CONFERENCE CALL (TAC NO. MB3708)

The attached information was e-mailed on February 5, 2002, to Mr. David Helker of Exelon Generation Company, LLC (the licensee). This information was transmitted to facilitate an upcoming conference call in order to clarify the licensees submittal dated December 21, 2001. In the submittal, the licensee requested a change to the LGS Unit 1 Technical Specifications, Safety Limit Minimum Critical Power Ratios. This memorandum and the attached questions do not convey or represent a Nuclear Regulatory Commission staff position regarding the licensees request.

Docket No. 50-352

Attachment:

Issues for Discussion in Upcoming Telephone Conference CONTACT: Christopher Gratton, NRR (301) 415-1055

ML020360342 OFFICE PM/PD1-2 LA/PD1-2 NAME CGratton MOBrien DATE 2/07/02 2/07/02 REQUEST FOR ADDITIONAL INFORMATION RELATING TO PROPOSED AMENDMENT TO LICENSE NO. NPF-39 EXELON GENERATION COMPANY, LLC LIMERICK GENERATING STATION, UNIT 1 DOCKET NO. 50-352 The Nuclear Regulatory Commission (NRC) staff has reviewed the December 21, 2001, Exelon submittal regarding changes to the Limerick Generating Station Unit 1 Safety Limit Minimum Critical Power Ratios (SLMCPRs) and has the following questions and comments concerning of the submittal:

1. Figures 1 and 2 for Cycle 9 and Cycle 10 Reference Core Loading Pattern, respectively, should be updated to include Limerick cycle-specific fuel type, quantity, and when they are loaded in the core.
2. The NRC staff found discrepancies in data bases while conducting an audit of General Electrics GEXL14 correlation analysis. Provide a justification why the overall GEXL14 uncertainty for Limerick Unit 1 is still valid. Discuss the impact on the SLMCPR calculation due to these discrepancies.
3. SLMCPR value for two recirculation loop operation given in Table 1 of Attachment 4 decreased by 0.02, even though the same approach was used for both the power distribution uncertainty and the non-power distribution uncertainty for Cycles 9 and 10. Similarly, the SLMCPR value for single loop recirculation loop operation decreased by 0.03. Please discuss in detail the reasons for these decreases.

Attachment