ULNRC-06095, Correction to Response to NRC Request for Information Per 10CFR50.54(f) Re Seismic Aspects of Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident - 1.5 Year Responses..

Correction to Response to NRC Request for Information Per 10CFR50.54(f) Re Seismic Aspects of Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident - 1.5 Year Responses..

ML14064A292
Person / Time
Site:	Callaway
Issue date:	03/04/2014
From:	Reasoner C Ameren Missouri, Union Electric Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
ULNRC-06095
Download: ML14064A292 (4)

Text

Cleve Reasoner

~~ Vice President Engineering "ii?iAmeren Ameren Missouri Callaway Energy Center T 573.676.8241 MISSOURI F 573.676.4056 March 04, 2014 ULNRC-06095 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 10 CFR 50.54(f)

Ladies and Gentlemen:

DOCKET NUMBER 50-483 CALLAWAY PLANT UNIT 1 UNION ELECTRIC CO.

FACILITY OPERATING LICENSE NPF-30 CORRECTION TO AMEREN MISSOURI RESPONSE TO NRC REQUEST FOR INFORMATION PURSUANT TO 10 CFR 50.54(f) REGARDING THE SEISMIC ASPECTS OF RECOMMENDATION 2.1 OF THE NEAR-TERM TASK FORCE REVIEW OF INSIGHTS FROM THE FUKUSHIMA DAI-ICHI ACCIDENT- 1.5 YEAR RESPONSES FOR CEUS SITES

References:

1. ULNRC-06030, Ameren Missouri Response to NRC Request for Information Pursuant to 10CFR50.54(f) Regarding the Seismic Aspects of Recommendation 2.1 of the Near-Term Task Force Review of Insights From the Fukushima Dai-ichi Accident- 1.5 Year Responses for CEUS Sites, dated September 12, 2013 On September 12, 2013, Union Electric Co. (dba Ameren Missouri) submitted a response (Reference

1) pursuant to 10 CFR 50.54(f) regarding the seismic aspects of Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident. It contained descriptions of subsurface materials and properties and base case velocity profiles prepared by the Electric Power Research Institute (EPRI). This report identified the Safe Shutdown Earthquake (SSE) control point for Callaway Unit 1 to be at the foundation level of the nuclear island at a depth of approximately 37 feet. This is incorrect in that the SSE control point is actually at the finished grade (surface). EPRI then used this information to prepare additional seismic hazard and screening information (Ground Motion Response Spectra (GMRS) curves).

Junction CC & Hwy 0 Fulton, MD 65251 AmerenMissouri.com PO Box 620, MC CA-460

ULNRC-06095 March 04, 2014 Page 2 As stated in Reference 1, the information provided was considered an interim product of seismic hazard evaluation efforts, with complete and final seismic hazard reports to be provided to the NRC by March 31, 2014. The corrected SSE Control Point, updated base case velocity profiles and GMRS curves will be provided in the March 31, 2014 submittal, which will also include the remaining seismic hazard and screening information.

This letter contains no new regulatory commitments.

Should you have any questions concerning the content of this letter, please contact Scott Maglio, Regulatory Affairs Manager, at 573-676-8719.

I declare under penalty of perjury that the foregoing is true and correct.

/~~r Sincerely, 5

Executed on:

Cleveland Reasoner Vice President, Nuclear Operations EMP

ULNRC-06095 March 04,2014 Page 3 cc: Mr. Marc L. Dapas Regional Administrator U. S. Nuclear Regulatory Commission Region IV 1600 East Lamar Boulevard Arlington, TX 760 11*A511 Senior Resident Inspector Callaway Resident Office U.S. Nuclear Regulatory Commission 8201 NRC Road Steedman, MO 65077 Mr. Fred Lyon Project Manager, Callaway Plant Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop 0-8B 1 Washington, DC 20555-2738 Mr. Eric Leeds Director, Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop 0-13H16M Washington, DC 20555-0001 Mr. Jack Davis Director, Mitigation Strategies Directorate Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

ULNRC-06095 March 04, 2014 Page4 Index and send hardcopy to QA File A160.0761 Hardcopy:

Certrec Corporation 4150 International Plaza Suite 820 Fort Worth, TX 76109 (Certrec receives ALL attachments as long as they are non-safeguards and may be publicly disclosed.)

Electronic distribution for the following can be made via Responses and Reports ULNRC Distribution:

F. M. Diya C. 0. Reasoner III D. W. Neterer L. H. Graessle S. A. Maglio T. B. Elwood J. L. Fortman J. T. Patterson D. M. Stepanovic Corporate Communications NSRB Secretary STARS Regulatory Affairs Mr. John O'Neill (Pillsbury Winthrop Shaw Pittman LLP)