ML14164A450
| ML14164A450 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 06/13/2014 |
| From: | Michael Balazik Japan Lessons-Learned Division |
| To: | Edwards M Omaha Public Power District |
| References | |
| Download: ML14164A450 (3) | |
Text
1 NRR-PMDAPEm Resource From:
Balazik, Michael Sent:
Friday, June 13, 2014 9:05 AM To:
Uribe, Juan; Rankin, Jennivine; DiFrancesco, Nicholas; David.Distel@exeloncorp.com; 'NRR-PMDA-ECapture.Resource@nrc.gov.'; 'medwards@oppd.com' Cc:
Rankin, Jennivine; 'bhansher@oppd.com'; Sebrosky, Joseph
Subject:
Draft RAIs for Fort Calhoun Mr. Edwards, By letter to the Nuclear Regulatory Commission (NRC) dated March 31, 2014 (Agencywide Documents and Management System (ADAMS) (public) Accession No. ML14097A087), Omaha Public Power District (the licensee), submitted for NRC review the Seismic Hazard and Screening Report, Response NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident for Fort Calhoun Station (FCS), Unit 1.
The NRC staff has reviewed the information provided for FCS and has determined that additional information is required to complete its review. The draft requests for additional information (RAIs) related to the NRC staff review are provided below.
After reviewing the draft RAIs, please contact me by email or by phone at 301-415-2856 to discuss the need for a teleconference to clarify the draft RAIs and to establish a due date for the response.
Optionally, OPPD has an opportunity to discuss the RAIs in the upcoming public meeting with the NRC on June 17, 2014. There is no staff expectation for OPPD to provide a final answer at this venue.
Respectfully, Michael Balazik Project Manager Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Japan Lessons Learned Directorate michael.balazik@nrc.gov Tel: (301) 415-2856 DRAFT REQUEST FOR ADDITIONAL INFORMATION FORT CALHOUN STATION, UNIT NO 1 SEISMIC HAZARD AND SCREENING REPORT DOCKET NOS. 50-285 By letter to the Nuclear Regulatory Commission (NRC) dated March 31, 2014 (Agencywide Documents and Management System (ADAMS) (public) Accession No. ML14097A087), Omaha Public Power District (the licensee), submitted for NRC review the Seismic Hazard and Screening Report, Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident for Fort Calhoun Station (FCS), Unit 1. To complete its review, the Nuclear Regulatory Commission staff requests responses to the following request for additional information.
2
- 1) Prior to restart of the unit, the as found condition of Class I structural members inside containment and in the auxiliary building were determined to be outside the current licensing basis. These issues are documented in a May 14, 2014, inspection report, Fort Calhoun - NRC Integrated Inspection Report Number 05000285/2014007 (ADAMS Accession No ML14134A410). In the FCS seismic hazard and screening report submittal of March 31, 2014, the licensee indicated that it will not perform a risk evaluation because the FCS Individual Plant Examination of External Events (IPEEE) Hazard Spectra (IHS) exceeds the calculated Ground Motion Response Spectra (GMRS). To support your conclusion, please describe how these structural elements were evaluated and found to have sufficient seismic capacity consistent with the IHS.
- 2) The FCS seismic hazard and screening report submittal indicated that a risk evaluation will not be performed because FCSs IPEEE high confidence of a low probability of failure spectrum exceeds the calculated GMRS. However, in considering the soil erosion observed during the 2011 flood at the site, please explain if the erosion and related impact could have potentially weakened the foundation supporting materials, and therefore affected the estimation of the site-specific GMRS.
Hearing Identifier:
NRR_PMDA Email Number:
1361 Mail Envelope Properties (87B1F1BDFE5A554CA9DC5EAA75EB6D0D01541BF45C11)
Subject:
Draft RAIs for Fort Calhoun Sent Date:
6/13/2014 9:05:29 AM Received Date:
6/13/2014 9:05:00 AM From:
Balazik, Michael Created By:
Michael.Balazik@nrc.gov Recipients:
"Rankin, Jennivine" <Jennivine.Rankin@nrc.gov>
Tracking Status: None
"'bhansher@oppd.com'" <bhansher@oppd.com>
Tracking Status: None "Sebrosky, Joseph" <Joseph.Sebrosky@nrc.gov>
Tracking Status: None "Uribe, Juan" <Juan.Uribe@nrc.gov>
Tracking Status: None "Rankin, Jennivine" <Jennivine.Rankin@nrc.gov>
Tracking Status: None "DiFrancesco, Nicholas" <Nicholas.DiFrancesco@nrc.gov>
Tracking Status: None "David.Distel@exeloncorp.com" <David.Distel@exeloncorp.com>
Tracking Status: None
"'NRR-PMDA-ECapture.Resource@nrc.gov.'" <NRR-PMDA-ECapture.Resource@nrc.gov.>
Tracking Status: None
"'medwards@oppd.com'" <medwards@oppd.com>
Tracking Status: None Post Office:
HQCLSTR01.nrc.gov Files Size Date & Time MESSAGE 3621 6/13/2014 9:05:00 AM Options Priority:
Standard Return Notification:
No Reply Requested:
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