ML16189A255

Dresden Nuclear Plant Annual Assessment Meeting/Open House (Hand Out)

ML16189A255
Person / Time
Site:	Dresden
Issue date:	07/07/2016
From:	Division of Nuclear Materials Safety III
To:
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Download: ML16189A255 (1)

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Dresden Nuclear Power Station Units 2 and 3Annual Assessment Meeting Open HouseJune30, 20162015 Reactor Oversight ProcessNuclear Regulatory Commission -Region III Our MissionTo license and regulate the nation's civilian use of byproduct, source, and special nuclear materials to ensure adequate protection of public health and safety, promote the common defense and security, and protect the environment.

2 Materials ReactorsWasteWhat We Regulate Radon Military X-RaysWhat We Don't Regulate Some Nuclear Facts

• 100 nuclear power plants supply about 20 percent of the electricity in the U.S.

• Nuclear materials are used in medicine for diagnosis and cancer treatment.

• Nuclear materials are widely used in industry, such as in density gauges, flow measurement devices, radiography devices, and irradiators.

5 NRC Performance GoalsSafety-Ensure adequate protection of public health and safety and the environmentSecurity-Ensure adequate protection in the secure use and management of radioactive materials 6 How We Regulate Regulatory FrameworkNRC's Safety Mission Strategic Performance Areas Cornerstones Cross-Cutting AreasHuman Performance--Safety Conscious Work Environment--Problem Identification &

Resolution Reactor Oversight Process 9SafetyCornerstonesBaseline Inspection ResultsSignificance ThresholdAction MatrixSignificance ThresholdPerformance IndicatorResultsRegulatory ResponseStrategicPerformance AreasSafetyCornerstonesBaseline Inspection ResultsSignificance ThresholdAction MatrixSignificance ThresholdPerformance IndicatorResultsRegulatory ResponseStrategicPerformance Areas Significance ThresholdIncreasing Safety Significance Green WhiteYellow Red Performance Indicators Inspection Findings Green WhiteYellow RedIncreasing Safety Significance Action Matrix Columns Increasing

• Safety Significance

• Inspection

• Management Involvement

• Regulatory Action Licensee Response Regulatory Response Degraded Multiple/Repetitive Degraded Unacceptable

Performance 12National Summary of Plant PerformanceStatus as of 02/22/2016Licensee Response 90 Regulatory Response 7 Degraded Cornerstone 0 Multiple/Repetitive Deg. Cornerstone3 Unacceptable 0 IMC 0350 Oversight0 Total100 13National Summary

• Performance Indicator Results for 2015*

-Green 6686-White12-Yellow 0-Red 0*PIs are counted per plant per quarter

• Total Inspection Findings in 2015

1. -Green 782-White8-Yellow 0-Red 0# Finding data current as of 2/22/2016 NRC Annual Assessment SummaryExelon operated the station safely and in a manner that preserved the public health and safety and protected the environment.Dresden Unit 2 was in the Regulatory Response Column of the NRC's Action Matrix at the start of 2015 in first quarter of 2015 due to a White performance indicator for greater than 3 scrams per 7000 operating hours and remained there until August 7, 2015. for the last three quarters of 2015 due to a White finding on the inoperability of a Unit 2 ElectromaticRelief Valve and remained there until the end of the first quarter of 2016Dresden Unit 3 was in the Regulatory Response Column for the fours quarter of 2015 due to a White finding on the inoperability of a Unit 3 ElectromaticRelief Valve and remained there until December 2, 2015No Substantive Cross-Cutting Issues were identifiedDresden Nuclear Power Station 2015 14 14 NRC Inspection Activities5307 total hours expended by NRC on Reactor Oversight Process activities2360 inspector hours of direct inspection activity733 inspector hours reviewing and observing plant operating status1291 inspector hours of preparation for and documentation of inspection activities 923 hours0.0107 days <br />0.256 hours <br />0.00153 weeks <br />3.512015e-4 months <br /> for other Reactor Oversight Process elements (e.g., assessments and communications) 15Dresden Nuclear Power Station 2015 NRC Inspection Activities2 resident inspectors on site -residents produced four quarterly inspection reports and walked through the plant daily26 other inspectors participated in various inspections 4 major inspectionsTwo Supplemental Inspections for Regulatory Response Column entryInitial Reactor Operator License ExaminationsModifications/10 CFR 50.59 InspectionDresden Nuclear Power Station 2015 16 Significance ThresholdGreen Baseline InspectionWhiteRequires additional NRC oversightYellowRequires more NRC oversightRedRequires most NRC oversightPerformance Indicators Inspection FindingsGreenVery low safety issueWhiteLow to moderate safety issueYellowSubstantial safety issueRedHigh safety issue 17 Dresden PIs and FindingsGreen Performance Indicators with One White in first quarter of 201511 Green/Severity Level IV

Inspection Findings1 White Inspection Finding associated with the Mitigating Systems CornerstoneJanuary 1 through December 31, 2015 18 Safety Significant FindingsNRC Identified one Unit 3 White finding in Fourth Quarter of 2014 which carried over to 2015NRC Identified one Unit 2 White finding in Second Quarter of 2015Both Findings Involved one of four Electromatic Relief Valves on each Unit's Main Steam LinesValves are designed to rapidly reduce reactor vessel pressure if neededLicensee failed to ensure continued operability of valve with increased steam flows after implementing an approved power uprateDresden Nuclear Power Station NRC Inspection FindingsFailure to prevent foreign material (teflontape) from degrading a relay in the starting circuit of a emergency diesel generator resulting in diesel generator inoperabilityFailure to perform Ultimate Heat Sink surveys in accordance with the Quality Assurance ProgramFailure to ensure procedure revisions did not result in conditions that could cause the Isolation Condenser to be outside of its design conditionsDresden Nuclear Power StationSome Examples of Green Findings 20 NRC Inspection Plans for 2016NRC Plans Baseline Inspections for 2016. This includes the following major team inspections:Component Design Basis Inspection (completed)Biennial Problem Identification and Resolution Inspection (completed)Initial Reactor Operator License Examinations 21Dresden Nuclear Power Station 22Mitigating Strategies (MS) & Spent Fuel Pool Instrumentation (SFPI) Order

• MS Order requires strategies to cope with a long term loss of safety systems

• SFPI Order requires plants to be able to tell if water is at or above certain levels

• Site Audit was performed in August 2015

• Site Safety Evaluation scheduled to be issued after the NRC receives the site compliance letter

• Regional inspection of MS inspection (TI 191, Rev 1) will be performed after Safety Evaluation issuedDresden FukushimaRecommendations Status 23-Requires that the hardened vents be capable of operating under severe accident conditions

-Licensee Combined Phase 1/Phase 2 Plan submitted in December 2015

-Site Audit Reports will be developed after Sites come into compliance with each Phase of the Order

-Completion expected in 2017 to 2018

-Site inspection will followHardened Vent Order Dresden Fukushima Flooding Response Status

• Flooding Hazard Reevaluations

-Reevaluate Hazards using present-Day information

-Licensee Flooding Evaluation was submitted in 2013 with followupanswers to questions in 2014

-Staff assessment issued March 31, 2015 and found Licensee's actions sufficient for identified flooding

scenarios-Inspectors completed TI-190 which verified a licensee's actions were appropriate to mitigate the evaluated flood levels 24 25*Seismic Walkdowns

-Verify that the site can meet its current requirements for hazard protection

-Walkdownsare complete; Staff assessments issued

• Seismic Hazard Reevaluations

-Reevaluate Hazards using present-Day information

-Initial Seismic Reevaluations submitted March 31, 2014

-NRC assessment of the initial licensee submittal was issued on April 27, 2015

-NRC assessment in letter dated October 27, 2015, stated licensee full assessment expected in June 2019

• Sites will evaluate the impacts of the updated Seismic hazards as part of their mitigating strategies assessment.Dresden Fukushima Seismic Response Status Actions in Response to the Japan Nuclear Accident

• Actions in response to Japan Nuclear Accident: http://www.nrc.gov/japan/japan-info.html*Mailbox for comments on staff actions: JLD_Public.Resource@nrc.gov

• Office of Public Affairs Point of Contact: OPA.resource@nrc.gov or 301-415-8200 26 NRC Social Media Channels*Blog:http://public-blog.nrc-gateway.gov/

• Flickr:http://www.flickr.com/photos/nrcgov/

• Twitter:https://twitter.com/#!/nrcgov

• YouTube: http://www.youtube.com/user/NRCgov

• RSS:http://www.nrc.gov/public-involve/listserver.html#rss 27 28Reference Sources

• Reactor Oversight Process

-http://www.nrc.gov/NRR/OVERSIGHT/ASSESS/index.html

• Public Electronic Reading Room

-http://www.nrc.gov/reading-rm.html

• Public Document Room 800-397-4209 (Toll Free)