GNRO-2012/00065, Regulatory Commitment Pertaining to License Amendment Request for Extended Power Uprate

Regulatory Commitment Pertaining to License Amendment Request for Extended Power Uprate

ML12165A250
Person / Time
Site:	Grand Gulf
Issue date:	06/12/2012
From:	Krupa M Entergy Operations
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
GNRO-2012/00065
Download: ML12165A250 (4)

Text

Entergy Operations, Inc.

P. O. Box 756 Port Gibson, MS 39150 Michael A. Krupa Director, Extended Power Uprate Grand Gulf Nuclear Station Tel. (601) 437-6694 GNRO-2012/00065 June 12, 2012 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

SUBJECT:

Regulatory Commitment Pertaining to License Amendment Request for Extended Power Uprate Grand Gulf Nuclear Station, Unit 1 Docket No. 50-416 License No. NPF-29

REFERENCES:

1. Entergy Operations, Inc. letter to the NRC (GNRO-2010/00056),

License Amendment Request - Extended Power Uprate, September 8, 2010 (ADAMS Accession No. ML102660403)

2. NRC e-mail to Entergy Operations, Inc., June 11, 2012

Dear Sir or Madam:

In Reference 1, Entergy Operations, Inc. (Entergy) submitted to the NRC a license amendment request (LAR) for an extended power uprate (EPU) for Grand Gulf Nuclear Station, Unit 1 (GGNS). In Reference 2, the NRC transmitted to Entergy two requests for information pertaining to analysis performed for the replacement steam dryer, as follows:

• Request for Information #1 The licensee is requested to provide the following additional information. For the first three high-stress locations in the steam dryer (bank top cap-inner, hoods-inner, outer end plates-inner), the licensee is requested to provide: (a) the contribution to the alternating stress intensity from the HF (SRV Resonance frequencies) range and the contribution from the LF range; and (b) PSD stress-versus-frequency plots and accumulative PSD stress-versus-frequency plots for the three high-stress locations.

• Request for Information #2 In Attachment 1 to Entergy letter GNRO-2011-00088 dated October 10, 2011 as a response to audit Action Item #9, the licensee stated that the maximum stress intensity approach assumes that the peak stress intensity range is equal to twice the maximum stress intensity.

If there is a complete reversal of the stress state against the one which the maximum stress

GNRO- 2012/00065 Page 2 of 2 intensity occurs, both the maximum stress intensity approach and the alternating stress intensity approach as defined in ASME Code would yield the same alternating stress intensity. Otherwise, the maximum stress intensity approach would give a conservative approach.

The licensee is requested to quantify for the three high-stress locations of the steam dryer, the peak stress intensity value and the amplitude of the alternating stress intensity to determine whether there is a complete reversal of the stress state, and how much conservatism is present.

By this letter, Entergy commits to include the requested information with the summary report of data from the main steam line strain gages and on-dryer instrumentation as stipulated in proposed Operating License Condition 2.C.(46)(a)3. GGNS shall not increase power above 3898 MWt until the NRC Project Manager notifies GGNS the NRC accepts the requested information or NRC questions regarding the information have been addressed. If no questions are identified within 240 hours0.00278 days <br />0.0667 hours <br />3.968254e-4 weeks <br />9.132e-5 months <br /> after the NRC receives the information, power ascension may continue.

If you have any questions or require additional information, please contact Guy Davant at (601) 368-5756.

I declare under penalty of perjury that the foregoing is true and correct; executed on June 12, 2012.

Sincerely, MAK/ghd

Attachment:

List of Regulatory Commitments cc: Mr. Elmo E. Collins, Jr. State Health Officer Regional Administrator, Region IV Mississippi Department of Health U. S. Nuclear Regulatory Commission P. O. Box 1700 612 East Lamar Blvd., Suite 400 Jackson, MS 39215-1700 Arlington, TX 76011-4005 U. S. Nuclear Regulatory Commission NRC Senior Resident Inspector ATTN: Mr. A. B. Wang, NRR/DORL (w/2) Grand Gulf Nuclear Station ATTN: ADDRESSEE ONLY Port Gibson, MS 39150 ATTN: Courier Delivery Only Mail Stop OWFN/8 B1 11555 Rockville Pike Rockville, MD 20852-2378

ATTACHMENT GNRO-2012/00065 LIST OF REGULATORY COMMITMENTS

Attachment to GNRO-2012/00065 Page 1 of 1 LIST OF REGULATORY COMMITMENTS The following table identifies those actions committed to by Entergy in this document. Any other statements in this submittal are provided for information purposes and are not considered to be regulatory commitments.

TYPE SCHEDULED (Check one)

COMMITMENT COMPLETION ONE-CONTINUING DATE TIME COMPLIANCE (If Required)

ACTION Entergy will include the requested information with the With submittal summary report of data from the main steam line strain of the gages and on-dryer instrumentation as stipulated in summary proposed Operating License Condition 2.C.(46)(a)3. report required GGNS shall not increase power above 3898 MWt until by proposed the NRC Project Manager notifies GGNS the NRC Operating accepts the requested information or NRC questions License regarding the information have been addressed. If no Condition questions are identified within 240 hours0.00278 days <br />0.0667 hours <br />3.968254e-4 weeks <br />9.132e-5 months <br /> after the NRC 2.C.(46)(a)3 receives the information, power ascension may continue.