ULNRC-06293, Mitigating Strategies Assessment (MSA) Report Submittal
| ML16097A615 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 04/06/2016 |
| From: | Hermann T Ameren Missouri, Union Electric Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| CAC MF1096, ULNRC-06293 | |
| Download: ML16097A615 (5) | |
Text
Timothy E. Herrmann, RE.
a P::_
Site Vice President Ameren Missouri Ameren Callaway Energy Center R7ISSOURI therrmann@ameren.com April 6, 2016 ULNRC-06293 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 CALLAWAY MITIGATING STRATEGIES ASSESSMENT (MSA) REPORT SUBMITTAL References : 1
. Letter dated March 1 2, 2012, from E. J. Leeds and M. R. Johnson, USNRC, to Adam.
C. Heftin, Callaway Plant, Union Electric Company, Request for Information Pursuant to Title 10 ofthe Code offederal Regulations 50.54(f) Regarding Recommendations 2.1, 2.3, and 9.3, ofthe Near-Term Task Force Review of Insights from the Fukushima Dai-Ichi Accident (ADAMS Accession No. ML12053A340)
- 2. ULNRC-05967, Flooding Hazard Reevaluation Report in Response to NRC Request For information Regarding Recommendation 2. 1, Flooding, ofthe Near-term Task Force Review of Insights From the Fukushima Dai-Ichi Accident, dated March 8, 2013 (ADAMS Accession No. ML13071A315)
- 3. Letter dated January 29, 2014, from C. F. Lyon, USNRC, to Fadi Diya, Callaway Plant, Union Electric Company, Callaway Plant, Unit 1 Request for Additional Information RE: Callaway Flooding Hazard Reevaluation Report (ADAMS Accession No. ML14028A264)
- 4. ULNRC-0608 1, Requested Information Regarding Callaway Flooding Hazard Reevaluation Report Submittal in Response to Near-Term Task Force Recommendation 2.1, dated February 27, 2014 (ADAMS Accession No. ML14059A232)
- 5. Letter dated October 29, 2014, from Robert F. Kuntz, USNRC, to Fadi Diya, Callaway Plant, Union Electric Company, Callaway Plant, Unit 1 StaffAssessment of Junction CC & Hwy 0 Fulton, MO 65251 AmerenMissouricom
- E P0 Box 620, MC C46O STARS AWance
ULNRC-06293 April 6, 2016 Page 2 Response to 10CFR 50.54(f) Information Request - Flood-Causing Mechanism Reevaluation (TAC No. MF1096) (ADAMS Accession No. ML14290A532)
- 6. Letter dated September 1, 2015, from William N. Dean, USNRC, to Power Reactor Licensees, Coordination of Requests for Information Regarding Flooding Hazard Reevaluations and Mitigating Strategies for Beyond-Design Basis External Events (ADAMS Accession No. ML15174A257)
- 7. Letter dated November 20, 2015, from Victor Hall, USNRC, to Fadi Diya, Callaway Plant, Union Electric Company, Callaway Plant, Unit 1 - Mitigating Strategies Assessment with Respect to the Reevaluated Flood Hazards Submitted in Response to the 10CFR50.54(f) Information Request - Flood-Causing Mechanism Reevaluation (CAC No. MF1096) (ADAMS Accession No. ML15314A108)
On March 12, 2012, the NRC issued Reference 1 to request information associated with Near-Term Task Force (NTTF) Recommendation 2.1 for Flooding. One of the Required Responses in Reference 1 directed licensees to submit a Flood Hazard Reevaluation Report (FHRR). For Callaway Plant, the FHRR was submitted on March 8, 2013 (Reference 2). The reevaluated flood hazard was further developed in response to requests for additional information (References 3 and 4). Per Reference 5, the NRC staff confirmed Ameren Missouris conclusions that the reevaluated hazard results for each flood-causing mechanism are bounded by the current design-basis flood hazard or do not inundate the plant site, and an Integrated Assessment is not necessary.
Reference 6 was issued on September 1, 2015, describing changes in the NRCs approach to flood hazard reevaluations. Reference 7, issued on November 20, 2015, stated in part, that, As described in the staff assessment, the NRC staff confirmed that the licensee responded appropriately to Enclosure 2 of the 50.54(f) letter. The NRC staff confirmed that the reevaluated hazard results for each reevaluated flood-causing mechanism are bounded by the current design-basis flood hazard and an integrated assessment or focused evaluation is not necessary for Callaway. The NRC staff has no additional information needs at this time with respect to Enclosure 2 of the 50.54(f) letter.
Reference 7 went on to state, The licensee is expected to perform an MSA (Mitigating Strategies Assessment) for Callaway. In order to clarify the expectation for Callaway, a telecon was held between NRC and Callaway Plant staff on December 1, 2015. During this call, it was clarified by NRC staff that the expectation for Callaway is to submit a brief response stating that the reevaluated flood hazard is bounded by the current design basis and therefore no further action, including performance of an MSA, is required. Accordingly, Callaway confirms that the reevaluated flood hazard is bounded by the current design basis, and an MSA will not be performed.
This letter does not contain new commitments. If you have any questions concerning the content of this letter, please contact Roger Wink, Regulatory Affairs Manager, at 573-310-7025.
I declare under penalty of perjury that the foregoing is true and correct.
ULNRC-06293 April 6, 2016 Page 3 Sincerely, Executed on: AL 2o1 Timothy E. Henniann Site Vice President
ULNRC-06293 April 6, 2016 Page 4 cc:
Mr. Marc L. Dapas 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-06293 April 6, 2016 Page 5 Index and send hardcopy to QA File A160.0761 Hardcopy:
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Electronic distribution for the following can be made via Responses and Reports ULNRC Distribution:
F. M. Diya T. E. Herrmann M. A. McLachlan R. C. Wink T. B. Elwood B. E. Huhmann J. T. Patterson D. M. Stepanovic Corporate Communications NSRB Secretary STARS Regulatory Affairs Mr. John O'Neill (Pillsbury Winthrop Shaw Pittman LLP)
Missouri Public Service Commission