ML071510191

Pilgrim - Supplemental Follow-Up Response to NRC Generic Letter 2003-01

ML071510191
Person / Time
Site:	Pilgrim
Issue date:	05/22/2007
From:	Bethay S J Entergy Nuclear Operations
To:	Document Control Desk, NRC/NRR/ADRO
References
2.07.050, GL-03-001
Download: ML071510191 (2)

Text

Entergy Nuclear Operations, Inc.Pilgrim Nuclear Power Station 600 Rocky Hill Road Plymouth, MA 02360 Stephen J. Bethay Director, Nuclear Assessment May 22, 2007 U.S. Nuclear Regulatory Commission Attention:

Document Control Desk Washington, D.C. 20555-0001

SUBJECT:

Entergy Nuclear Operations, Inc.Pilgrim Nuclear Power Station Docket 50-293 License No. DPR-35 Supplemental Follow -Up Response to NRC Generic Letter 2003-01 1. Entergy Letter No. 2.06.019, "Follow-up Response to NRC Generic Letter 2003-01", dated March 20, 2006 (TAC MB9840)REFERENCE LETTER NUMBER: 2.07.050

Dear Sir or Madam:

Reference 1 provided the follow-up response to Generic Letter 2003-1 for Pilgrim Nuclear Power Station (PNPS). In the attachment to the letter, PNPS indicated that it planned on submitting a license amendment request to revise the licensing basis to adopt the remaining scope of AST applicability that would allow Control Room Envelope (CRE) inleakage greater than the current licensing basis.During the time since that letter was submitted, the inputs to the original dose consequence calculationwere reassessed.

The dose consequence calculation was revised to update inputs with a control room inleakage value of 400 scfm. This value is substantially greater than the measured inleakage of 121 +/- 26 scfm (Reference 1). The revised calculation demonstrates that the GDC-19 dose limits are met when the Control Room is placed in the isolated mode. Based on the results from the revised dose consequence analysis, PNPS is no longer planning to submit a request to adopt the AST methodology.

This letter contains no new commitments.

Should you require further information, please contact Bryan Ford at (508) 830-8403.Sincerely, S4teeJ etha'y Director, Nuclear Assessment

.MJG/dlý [ 0 -)-

Entergy Nuclear Operations, Inc Pilgrim Nuclear Station cc: Mr. James S. Kim, Project Manager Plant Licensing Branch I-1 Division of Operator Reactor Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission One White Flint North O-8C2 11555 Rockville Pike Rockville, MD 20852 Letter Number 2.07.050 Page 2 Regional Administrator, Region 1 U.S. Nuclear Regulator Commission 475 Allendale Road King of Prussia, PA 19406 Senior Resident Inspector Pilgrim Nuclear Power Station