ML14105A452

Duane Arnold Energy Center - Staff Assessment of the Seismic Walkdown Report Supporting Implementation of Near-Term Task Force Recommendation 2.3 Related to the Fukshima DAI-ICHI Nuclear Power Plant Accident (TAC No. MF0121)

ML14105A452
Person / Time
Site:	Duane Arnold
Issue date:	05/22/2014
From:	Chawla M L Plant Licensing Branch III
To:	Anderson R L NextEra Energy Duane Arnold
Mahesh Chawla, NRR/DORL 415-8371
References
TAC MF0121
Download: ML14105A452 (13)

Text

Mr. Richard L. Anderson Vice President NextEra Energy Duane Arnold, LLC 3277 DAEC Road Palo, lA 52324-9785 May 22, 2014

SUBJECT: DUANE ARNOLD ENERGY CENTER-STAFF ASSESSMENT OF THE SEISMIC WALKDOWNREPORT SUPPORTING IMPLEMENTATION OF NEAR-TERM TASK FORCE RECOMMENDATION 2.3 RELATED TO THE FUKUSHIMA DAI-ICHI NUCLEAR POWER PLANT ACCIDENT (TAC NO. MF0121)

Dear:

Mr. Anderson On March 12, 2012, the U.S. Nuclear Regulatory Commission (NRC) issued a request for information letter per Title 10 of the Code of Federal Regulations, Subpart 50.54(f) (50.54(f) letter). The 50.54(f) letter was issued to power reactor licensees and holders of construction permits requesting addressees to provide further information to support the NRC staff's evaluation of regulatory actions to be taken in response to lessons learned from Japan's March 11, 2011, Great Tohoku Earthquake and subsequent tsunami. The request addressed the methods and procedures for nuclear power plant licensees to conduct seismic and flooding hazard walkdowns to identify and address degraded, nonconforming, or unanalyzed conditions through the corrective action program, and to verify the adequacy of the monitoring and maintenance procedures. By letter dated November 27, 2012, NextEra Energy Duane Arnold, LLC (NextEra Energy Duane Arnold) submitted its Seismic Walkdown Report as requested in Enclosure 3 of the 50.54(f) letter for the Duane Arnold Energy Center. By letter dated September 13, 2013, NextEra Energy provided additional information on the completion of inaccessible items and the substitutions made to the list of inaccessible items in order to complete all walkdowns by the fourth quarter of 2014. By letter dated November 22, 2013, NextEra Energy Duane Arnold provided a response to the NRC request for additional information for the staff to complete its assessments. The staff acknowledges that an updated walkdown report incorporating the results of the deferred walkdowns will be provided 90 days after the end of the next refueling outage scheduled for the fourth quarter of 2013, consistent with the regulatory commitment. The NRC staff reviewed the information provided and, as documented in the enclosed staff assessment, determined that sufficient information was provided to be responsive to Enclosure 3 of the 50.54(f) letter.

R. Anderson -2 -If you have any questions, please contact me at 301-415-8371 or by e-mail at Mahesh.chawla@ nrc.gov. Docket No. 50-331

Enclosure:

Staff Assessment of Seismic Walkdown Report cc w/encl: Distribution via Listserv

Sincerely,Mahesh Chawla, Project Manager Plant Licensing Branch 111-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation STAFF ASSESSMENT OF SEISMIC WALKDOWN REPORT NEAR-TERM TASK FORCE RECOMMENDATION 2.3 RELATED TO THE FUKUSHIMA DAI-ICHI NUCLEAR POWER PLANT ACCIDENT 1.0 INTRODUCTION NEXTERA ENERGY DUANE ARNOLD. LLC DUANE ARNOLD ENERGY CENTER DOCKET NO. 50-331 On March 12, 2012,1 the U.S. Nuclear Regulatory Commission (NRC) issued a request for information per Title 10 of the Code of Federal Regulations, Subpart 50.54(f) (50.54(f) letter) to all power reactor licensees and holders of construction permits in active or deferred status. The request was part of the implementation of lessons learned from the accident at the Fukushima Dai-ichi nuclear power plant. Enclosure 3, "Recommendation 2.3: Seismic,"2 to the 50.54(f) letter requested licensees to conduct seismic walkdowns to identify and address degraded, nonconforming, or unanalyzed conditions using the corrective action program (CAP), verify the adequacy of monitoring and maintenance procedures, and report the results to the NRC. The 50.54(f) letter requested licensees to provide the following: a. Information concerning the plant-specific hazard licensing bases and a description of the protection and mitigation features considered in the licensing basis evaluation. b. Information related to the implementation of the walkdown process. c. A list of plant-specific vulnerabilities identified by the Individual Plant Examination of External Events (IPEEE) program and a description of the actions taken to eliminate or reduce them. d. Results of the walkdown including key findings and identified degraded, nonconforming, or unanalyzed conditions. e. Any planned or newly installed protection and mitigation features. f. Results and any subsequent actions taken in response to the peer review. In accordance with the 50.54(f) letter, Enclosure 3, Required Response Item 2, licensees were required to submit a response within 180 days of the NRC's endorsement of the seismic 1 ADAMS Accession N