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Operating Feedback

Operating Feedback. The Use of Operating Experience by AVN J.J. Van Binnebeek - AVN. Responsibility of OEF activities. Responsibility for OEF=Licensee Analyse national & international events  detect & prioritise according to significance  detect precursors of severe conditions

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Operating Feedback

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  1. Operating Feedback The Use of Operating Experience by AVN J.J. Van Binnebeek - AVN Topical Condference on Operating Feedback-Cologne 2006

  2. Responsibility of OEF activities • Responsibility for OEF=Licensee • Analyse national & international events •  detect & prioritise according to significance •  detect precursors of severe conditions •  detect emerging trends • Applicable Lessons Learnt to their plant •  reports • Prevent occurrence or recurrence • International reporting= AVN Topical Condference on Operating Feedback-Cologne 2006

  3. Purpose of AVN’s OEF process • RB (inspection) activities: • Verify adequacy of OEF process by licensee • Enforce actions in case of deficiencies • AVN’S EOF process • Support inspection process (particularly in OEF) • Analyse events (BE+ international) • Identify safety relevance for BE • Propose actions to Inspection group (incl. Enforcement) • Select BE events candidate to international reporting • QS process Topical Condference on Operating Feedback-Cologne 2006

  4. Data sources used by AVN • BE • Inspection or expertise reports • Reports by licensees • International • IRS • IRSRR • FINAS • Official publications a.o. by USNRC • WGOE (+ other international WG) • Any other reliable information source Topical Condference on Operating Feedback-Cologne 2006

  5. Screening & selection of events • Specific teams for BE or international OEF • Basis: • Safety relevance, adverse trends & lessons learnt • Root causes: technical + HOF • Engineering judgement  experienced people • BE: • Criteria  Fiche • International • Mainly oriented toward BE applicability • Specific factors considered (generic, BE similarities, prior occurrence in BE, applicability of LL) • Databases Topical Condference on Operating Feedback-Cologne 2006

  6. Event Analysis • Applicability of Lessons learnt to the various BE plants • Potential occurrence & effects • Possible enforcement actions • Quarterly reports • Lessons Learnt & potential applications to other plants • Actions towards other plants decided by ad-hoc committee Topical Condference on Operating Feedback-Cologne 2006

  7. Event analysis • BE events • Assessment of Quality of reporting, Root cause analysis & corrective actions by licensee (Inspectorate) • PSAEA analysis on selected events • Yearly screening • Analyses • Reports  results to licensees Topical Condference on Operating Feedback-Cologne 2006

  8. Event analysis • Foreign events • More in-depth analysis whenever needed • Confirming potential applicability • Concerned licensees  requests • Cross-references • Follow-up • Assess answers to requested actions • Frameworks for further treatment (PSR, …) Topical Condference on Operating Feedback-Cologne 2006

  9. Overall results for AVN • Creation of overall expertise • For inspectors (knowledge of events & of their importance) • Build–up of inspector & experts knowledge • Necessity to make R&D to improve EOF activities • Analysis methods (root causes , HF) • PSA applications (PSAEA) Topical Condference on Operating Feedback-Cologne 2006

  10. Monitoring of the licensee EOF process • Monitoring fed by created inspectors’ expertise • Continuous monitory • Observations during inspections • Observations at the occasion of an event or of the publication of a foreign EOF situation • Specific monitoring • Thematic inspection of the EOF process • Overall process structure assessment • Assessment of outcomes Topical Condference on Operating Feedback-Cologne 2006

  11. AVN EOF Process requirements • On-line & timely results • Quick element to push the licensee when needed • Parallel sampling analysis to check the licensee’s process • Need for pro-activity, anticipation • Quick feedback reactions Topical Condference on Operating Feedback-Cologne 2006

  12. Specific cases • Sump Clogging • Example of inadequate licensee’s process • Need for AVN pushes • PSAEA analyses evidencing initiators / sequences not expected by safety cases • Mid-loop events • Success of PSAEA to show the seriousness of a problem not recognised otherwise Topical Condference on Operating Feedback-Cologne 2006

  13. Specific cases • Vessel head: • cracks (USNRC Order EA-03-009) • Discussion on NDT examination frequency • Grid reliability • Requirements from AVN based on a combination of requirements from USNRC (GL 2006-02) and from WANO (SOER 1999-1) adapted to the Belgian context • OEF related to installations not under the current responsibilty of Licensee -> contractual relationship with owner of the grid Topical Condference on Operating Feedback-Cologne 2006

  14. Specific cases • Pressure Locking • Early enforcement of NRC Bulletins • Full analysis and improvement programme by licensee • Actual realisation not fully satisfactory (Still Pressure locking cases discovered!) •  Question on the achievement of an actual solution of the problem Topical Condference on Operating Feedback-Cologne 2006

  15. Conclusions • RB EOF activities to cover Licensee’s EOF process • organisation • monitoring • Independent screening of national & foreign events (incl. Studies) to • Increase expertise • Verify licensee’s EOF process quality • Be sure important precursors or safety issues are not missed Topical Condference on Operating Feedback-Cologne 2006

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