CNRO-2007-00034, Request for Alternative GG-ISI-002, Response to Request for Additional Information

Request for Alternative GG-ISI-002, Response to Request for Additional Information

ML072410257
Person / Time
Site:	Grand Gulf
Issue date:	08/27/2007
From:	Mccann J Entergy Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
CNRO-2007-00034, GG-ISI-002
Download: ML072410257 (3)

Text

Entergy Operations, Inc.

1340 Echelon Parkway Jackson, Mississippi 39213-8298 Tel 601-368-5000 John F. McCann Director, Nuclear Safety &Licensing CNRO-2007-00034 August 27, 2007 U. S. Nuclear Regulatory Commission Attn.: Document Control Desk Washington, DC 20555-0001

SUBJECT:

Request for Alternative GG-ISI-002 Response to Request for Additional Information Grand Gulf Nuclear Station Docket No. 50-416 License No. NPF-29

REFERENCE:

Entergy Operations, Inc. letter CNRO-2006-00043 to the NRC, dated September 22, 2006

Dear Sir or Madam:

In the referenced letter, Entergy Operations, Inc. (Entergy) submitted Request for Alternative GG-ISI-002, which requests approval to implement a risk-informed inservice inspection (ISI) program at Grand Gulf Nuclear Station (GGNS). The program is to be based on ASME Code Case N-716, Alternative Piping Classificationand Examination Requirements, Section X1 Division 1.

In a telephone call held on August 20, 2007 to discuss GG-ISI-002, the NRC staff asked Entergy to specify which method or technique was use to estimate piping failure frequency in the GGNS flooding analysis, which supports the request. For the GGNS flooding analysis, Entergy calculated the initiating event frequency based on the number of feet of pipe in the flood area and pipe failure rate taken from INEL Report EGG-SSRE-8875 (Feb. 1990).

Should you have any further questions regarding GG-ISI-002, please contact Guy Davant at (601) 368-5756.

This letter contains no new commitments.

Sinccer ly, JFM/GHD/ghd & 47

CNRO-2007-00034 Page 2 of 2 cc: Mr. J. S. Forbes (ECH)

Mr. 0. Limpias (ECH)

Mr. W. R. Brian (GGNS)

Dr. Bruce S. Mallett Regional Administrator, Region IV U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 NRC Senior Resident Inspector Grand Gulf Nuclear Station Route 2, Box 399 Port Gibson, MS 39150 U.S. Nuclear Regulatory Commission Attn: Mr. B. K. Vaidya MS 0-7 D1 Washington, DC 20555-0001

CNRO-2007-00034 bcc: Mr. W. B. Abraham (G-ADM2-LIC)

Mr. C. A. Bottemiller (G-ADM2-LIC)

Mr. C. A. Bregar (N-TSB-56)

Ms. K. S. Cook (W-GSB-310)

Mr. J. J. Costedio (K-JAF-H145)

Mr. M. L. Crawford (G-SSB1-NSR)

Ms. C. D. Faison (K-WPO-12C)

Ms. S. S. Fey (W-GSB-318)

Ms. S. T. Fontenot (W-GSB-318)

Mr. B. S. Ford (P-PILG-1)

Mr. K. W. Hall (M-ECH-36)

Mr. D. E. James (N-GSB-64)

Mr. M. A. Krupa (G-ADM1-NSR)

Mr. R. S. Lewis (M-ECH-36)

Mr. D. N. Lorfing (R-GSB-42)

Ms. K. A. Maher (R-GSB-42)

Mr. D. J. Mannai (V-VYP-103)

Mr. R. J. Murillo (W-GSB-318)

Mr. J. C. Roberts (R-GSB-42)

Mr. S. R. Scott (M-ECH-36)

Ms. D. S. Waldron (N-GSB-64)

Mr. R.W. Walpole (K-IP-GSB2D)

Echelon Information Management File [4]