ULNRC-06334, Supplement to Expedited Seismic Evaluation Process Report
| ML16287A758 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 10/13/2015 |
| From: | Herrmann T Union Electric Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| ULNRC-06334 | |
| Download: ML16287A758 (4) | |
Text
Callaway Plant P.O. Box 620 : Fulton, MO 65251 : AmerenMissouri.com October 13, 2016 ULNRC-06334 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.
RENEWED FACILITY OPERATING LICENSE NPF-30 SUPPLEMENT TO EXPEDITED SEISMIC EVALUATION PROCESS REPORT
References:
- 1. NRC Letter, "Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Recommendations 2.1, 2.3, and 9.3, of the Near Term Task Force Review of Insights from the Fukushima Dai-ichi Accident," dated March 12, 2012 (ADAMS Accession No. ML12053A340)
- 2. ULNRC-06161, 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 - Expedited Seismic Evaluation Process Report, dated December 22, 2014
- 3. ULNRC-06239, Supplement to Expedited Seismic Evaluation Process Report, dated September 9, 2015
- 4. ULNRC-06291, " Supplement to Expedited Seismic Evaluation Process Report, dated July 06, 2016
- 5. EPRI TR-3002000704, Seismic Evaluation Guidance: Augmented Approach for the Resolution of Fukushima Near-Term Task Force Recommendation 2.1 Seismic",
dated May 2013 (ADAMS Accession No. ML13102A142)
On March 12, 2012, the Nuclear Regulatory Commission (NRC) issued a 50.54(f) letter to all power reactor licensees and holders of construction permits in active or deferred status. Enclosure 1 of Reference 1 requested each addressee located in the Central and Eastern United States (CEUS) to
ULNRC-06334 October 13, 2016 Page2 submit a Seismic Hazard Evaluation and Screening Report within 1.5 years from the date of Reference
- 1. In accordance with the NRC-endorsed guidance in Reference 5, the Expedited Seismic Evaluation Process (ESEP) Report for Callaway Plant was provided under Reference 2.
On July 16, 2015, a teleconference between Ameren Missouri and NRC staff was conducted, and at that time, it was determined that additional components needed to be added to Callaway's Expedited Seismic Evaluation List (ESEL). Reference 3 served as a near term supplement to Reference 2, identifying the additional components added to the ESEL. Reference 4 transmitted the results of the completed walkdowns and engineering analysis for the added components.
All equipment evaluated for the ESEP for Callaway Plant was found to have adequate capacity for the required seismic demand as defined by the Augmented Approach (ESEP) guidance (Reference 5), with the exception of certain relays located in Motor Control Centers (MCCs) NG03C and NG04C, the Condensate Storage Tank (CST), and the Refueling Water Storage Tank (RWST). The MCC relays were addressed with a procedure change (FLEX Support Guideline revised). To address the CST, a new Hardened Condensate Storage Tank was constructed and put into service in May 2016. For the RWST, additional evaluation was required, as summarized below.
To address seismic capability concerns for the RWST, a seismic capability analysis was performed in which a High-Confidence-of-a-Low-Probability-of-Failure (HCLPF) value was calculated and compared to the Ground Motion Response Spectrum (GMRS). The calculated RWST HCLPF value (0.498g) was found to exceed the GMRS value (0.39g). Since the seismic capacity of the RWST is in excess of the GMRS, it is concluded that the Callaway RWST meets the requirements of the ESEP.
This letter serves to document closeout to Callaway Plant's ESEP regulatory commitments. No additional plant modifications are required as a result of ESEP, and no new commitments are identified.
Should you have any questions concerning the content of this letter, please contact Mr. Tom Elwood, Regulatory Affairs Supervisor, at (314) 225-1905.
I declare under penalty of perjury that the foregoing is true and correct.
Executed on:
/0/13 / ~0 I &
+,--~,~-------
EMP Timothy E. Herrmann Site Vice President
ULNRC-06334 October 13, 2016 Page 3 cc:
Mr. Kriss M. Kennedy Regional Administrator U. S. Nuclear Regulatory Commission Region IV 1600 East Lamar Boulevard Arlington, TX 76011-4511 Senior Resident Inspector Callaway Resident Office U.S. Nuclear Regulatory Commission 8201 NRC Road Steedman, MO 65077 Mr. L. John Klos Project Manager, Callaway Plant Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop O-8B1 Washington, DC 20555-2738
ULNRC-06334 October 13, 2016 Page 4 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 T. E. Herrmann B. L. Cox R. C. Wink T. B. Elwood J. T. Patterson B. E. Huhmann D. M. Stepanovic Corporate Communications NSRB Secretary STARS Regulatory Affairs Mr. John O'Neill (Pillsbury Winthrop Shaw Pittman LLP)