1CAN041301, Unit 1, Response to Request for Additional Information Related to 10 CFR 50.46 30-Day Report

Unit 1, Response to Request for Additional Information Related to 10 CFR 50.46 30-Day Report

ML13101A267
Person / Time
Site:	Arkansas Nuclear
Issue date:	04/10/2013
From:	Pyle S Entergy Operations
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
1CAN041301
Download: ML13101A267 (2)

Text

Entergy Operations, Inc.

1448 S.R. 333 Russellville, AR 72802 Tel 479-858-4704 Stephenie L. Pyle Manager, Licensing Arkansas Nuclear One 1CAN041301 April 10, 2013 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

Subject:

Response to Request for Additional Information Related to 10 CFR 50.46 30-Day Report Arkansas Nuclear One - Unit 1 Docket No. 50-313 License No. DPR-51

References:

1. Entergy letter dated March 20, 2012, 10 CFR 50.46 Report -

Significant Change in Peak Cladding Temperature (1CAN031202)

(ML12080A120)

2. NRC email dated November 8, 2012, RAI on the Review of 10 CFR 50.46 30-day Report (ML12313A440)

3. AREVA letter dated December 6, 2012, Generic RAI Response to a 30-Day 10 CFR 50.46 Report of Significant PCT Change, (AREVA Letter NRC:12:062) (ML12342A381)

4. Entergy letter dated December 17, 2012, Response to Request for Additional Information Related to 10 CFR 50.46 30 Day Report (1CAN121203) (ML12353A489)

5. NRC email dated March 21, 2013, Request for Additional Information - TAC No. ME9719 (ML13080A350)

6. AREVA letter dated March 28, 2013, Generic RAI Response to a 30-Day 10 CFR 50.46 Report of Significant PCT Change, (AREVA Letter NRC:13:014)

Dear Sir or Madam:

Entergy Operations, Inc. (Entergy) submitted a 30-day report to inform the NRC of two errors in the Arkansas Nuclear One, Unit 1 (ANO-1) Emergency Core Cooling System evaluation model (Reference 1). The errors resulted in no net changes to the Peak Clad Temperature calculated for the Large Break Loss-of-Coolant Accident. Each individual error as well as the sum of the absolute values of the two errors is greater than the requirement of 10 CFR 50.46.

1CAN041301 Page 2 of 2 On reviewing the submittal, the NRC staff requested additional information (RAI) to continue the review and issued Reference 2. References 3 and 4 provided the responses to the request.

Reference 5 provided the NRCs subsequent RAI. In response to this RAI, AREVA has prepared a generic response to address these questions. This response is provided by Reference 6.

This submittal contains no regulatory commitments.

Should you have any questions, please contact me.

Sincerely, Original signed by Stephenie L. Pyle SLP/rwc cc: Mr. Arthur T. Howell Regional Administrator U. S. Nuclear Regulatory Commission Region IV 1600 East Lamar Boulevard Arlington, TX 76011-4511 NRC Senior Resident Inspector Arkansas Nuclear One P. O. Box 310 London, AR 72847 U. S. Nuclear Regulatory Commission Attn: Mr. Kaly Kalyanam MS O-8 B1 One White Flint North 11555 Rockville Pike Rockville, MD 20852