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A n n u a l M e e t i n g o n t h e S a f e t y a n d L i c e n s i n g o f R e s e a r c h R e a c t o r s

ENRRA Cairo, Egypt 28 August – 01 September 2016

State te O Offi ffice f for Nucle lear S Saf afety Czec ech R Repu epublic

Periodic Safety Review Process for Research Reactors

Objectives

• PSR on Research Reactors – the reason?
• Regulatory requirements for Periodic Safety Review (PSR)

– current status

• PSR process on Nuclear Power Plants
• Graded approach for PSR application on Research

Reactors

• New regulatory requirements for PSR and their application
• n Research Reactors
• Conclusion

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Periodic Safety Review Process for Research Reactors

Overview of Research Reactors

Research Reactor LR-0 Nominal power: 1 kW thermal Nuclear fuel: VVER-1000 / VVER-440 Utilization: core physics and shielding of VVER experiments Training Reactor VR-1 Vrabec Nominal power: 1 kW thermal Nuclear fuel: type IRT-4M, enrichment 19,75 % U235 Utilization: training tasks Research Reactor LVR-15 Nominal power: 10 MW thermal Nuclear fuel: type IRT-4M, enrichment 19,75 % U235 Utilization:

material research and corrosion tests of I. circuit of NPPs radiopharmaceuticals and radioisotopes production silicone doping

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Periodic Safety Review Process for Research Reactors

PSR on Research Reactors – WHY?

• PSR is a standard requirement for security assessment on nuclear

installations, which is conventionally provided on both - the power reactors and on the Research Reactors nuclear installations. Outputs from the PSR serve as a basis for an application for a permit to operate license.

• Based on the experience of participating countries presented at the IAEA

workshop on PSR, which was held in Vienna, they are carrying the PSR on their research reactors and they have highlighted positive results from the view of improving nuclear safety and radiation protection, as well as demonstrable detecting deviations from current good practice in terms of safety of Research Reactors. Workshop therefore recommended that all Research Reactors operating organizations who have not established the PSR for their research reactors should do so.

• PSR will be legislatively required as a condition for the granting of

permits to operating license in all nuclear installations, including Research Reactors in Czech Republic.

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Periodic Safety Review Process for Research Reactors

Regulatory requirements for PSR – current situation

ATOMIC ACT General Requirements and obligations:

• Activities relating to nuclear energy or radiation utilization shall be justified and nuclear safety and radiation

protection shall be ensured as a matter of priority.

• A licensee shall assess in a systematic and comprehensive manner the fulfilment of requirements, from the

aspect of the current level of science and technology, and ensure that the assessment results are put into practice.

CONDITIONS OF OPERATING LICENSE (applied for NPPs only) Operating license for Dukovany NPP, 1. Unit (LTO), issued by SÚJB 30.3.2016

• The Applicant shall submit the methodology and criteria of PSR to SÚJB, T:30.6.2020
• The Applicant shall perform PSR and submit the final report to SÚJB, T: 30.4.2025
• The Applicant shall submit the results of meeting the schedule of completing corrective actions to SÚJB, T: annually

REGULATORY GUIDE:

• Regulatory guide BN-JB-1.2, Rev. 1 – Safety Instructions for Periodic Safety Review

INTERNATIONAL STANDARDS:

• IAEA Safety Standards Series No. SSG-25 - Periodic Safety Review for Nuclear Power Plants
• WENRA Safety Reference Levels for Existing Reactors - Issue P (Periodic safety review), 2014

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Periodic Safety Review Process for Research Reactors

WENRA Safety Reference Levels for Existing Reactors Issue P - Periodic Safety Review, 2014

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Periodic Safety Review Process for Research Reactors

PSR structure and methodology on Nuclear Power Plants

According to the IAEA Safety Standards Series No. SSG-25 - Periodic Safety Review for Nuclear Power Plants and

defined PSR safety factors which are divided into five subject areas to facilitate the review and

IAEA-TECDOC (under development) for Periodic Safety Reviews for Research Reactors

Basis for PSR

• National Legal Requirements
• WENRA Reference Levels
• IAEA Safety guides and international best practice
• Regulatory guides, Normative documentation, ...

Methodology

• Collecting of documents and information relating to the criteria
• Evaluate and compare the information on the actual status with

the requirements of criteria (Best Practice)

• Identify strengths
• Identify deviations and propose corrective measures

Source for evaluation consist of design and licensing documentation (especially Safety Report Analysis), control and work documentation, reports of the findings of internal and external audits and controls (OSART, WANO Peer Review, SÚJB inspections and other), records

• f the procedures and other documents, which are demanded for

assessment purpose.

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Periodic Safety Review Process for Research Reactors

Phases of PSR

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1. Phase – preparation of PSR

• Specifications of the scope of assessments, defining legislative and normative base
• Outputs: Strategy of Approach to PSR, the Methodology and Criteria, a draft schedule of

each stage of PSR.

• 2. Phase – execution (perform) of the PSR Assessment
• Systematic evaluation (detailed comparison of the actual state, with the requirements of

the applicable criteria)

• Outputs: Reports on evaluation of individual thematic areas of PSR, a list of strengths and

a list of deviations ranked and sorted by severity.

• 3. Phase – corrective actions from findings in PSR
• Formulation of safety deviations findings and setting the method of implementing

corrective actions

• Outputs: Schedule of corrective actions on safety findings and final report of the PSR

preparation.

Periodic Safety Review Process for Research Reactors

PSR Schedule Plan on NPP

PSR starting phase PSR preparation phase Methodology and Criteria, Strategy of PSR

• 6 months

PSR performing phase PSR Reviews 12 months PSR reports finalization phase Preparation of the Action Plan of Corrective Actions 6 months Submission of PSR results to SÚJB latest in term stated in License PSR finalization phase Answering SÚJB comments, PSR Final Report finalization 6 months Agreement between

• perating organization and

regulatory body on general scope and requirements for PSR and its expected

• utcome

Approval of an Action Plan of Corrective Actions

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Periodic Safety Review Process for Research Reactors

PSR Evaluation Sheet and process of verification

Evaluation Sheet PSR EDU 30

No and version of AS OXFYKZN(WIJ)(S,SK)v0 Area X Name of the area Factor Y Name of the factor Criteria Z The overall text of criteria Documentation used for the evaluation of criteria (Unique identification of used documentation, including revision / date of issue) Background Commentary Descriptive part of the evaluation of criteria: (describing how was the criteria evaluated, how is the criteria fulfilled, whether are there deviations or suspected non-fulfillment of criteria, which one? Whether is current status better than Best Practice, in which area and in what way?). Evaluation of Block differences: (differences among blocks will be listed with a brief commentary

• nly in case they would lead to the deviations or strengths)

Other insights, comments and suggestions: (Mention important facts related to the evaluation, including feedback and recommendations useful in future assessments of criteria. In case of unavailability of necessary documents for criteria assessment, state: CRITERIUM CAN NOT BE ASSESSED) Were identified strengths? (Individual strengths will be listed and numbered. The facts leading to their formulation must be listed with description. In case they were not identified put NOT). Were identified deviations in criteria fulfillment?(All deviations will be listed and numbered. . The facts leading to their formulation must be listed with description. In case they were not identified put NOT, CRITERIUM IS FULFILLED) Proposal for recommendations for corrective actions to resolve deviations: (Corrective actions to resolve the deviations will be listed there). Name and surname of the reviewer: Date of evaluation completing: Name and surname of the guarantee: Date of validation: Name and surname of the opponent: Date of opponency:

• Reviewer have to cover all criteria for

particular factor before evaluating it.

• Reviewer should be experienced in particular

area for its evaluating.

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Periodic Safety Review Process for Research Reactors

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Graded Approach in PSR on RRs

• § 5 Atomic Act (2017) Sec. 8 imposes the obligation to operators of Nuclear

Facilities to use a graded approach, which must conform to:

• a)

type of the nuclear installation or category of workplaces with ionizing radiation

• b)

the type of nuclear material and RAW which is located in the nuclear facility and

• c)

the scope of operation activities.

• Subject to agreement between the operator and the regulatory body before

conducting the PSR on RRs will define relevant areas covered in PSR - different requirements of assessment process will be covered on the VR-1 training reactor and LR-0 and LVR-15 research reactors.

• Graded approach on RRs lies in defining the scope of the assessed areas,

but not at grading the time frequency to perform PSR on RRs. (It is good practice to conduct the PSR on RRs in regular repetition of every 10 years.)

• Similarly, the scope and content of the relevant documents, which are

the output of all three phases of the PSR on RRs will be discussed and agreed on.

Periodic Safety Review Process for Research Reactors

• The Atomic Act and the whole set of its implementing Decrees is currently under

substantial amendment

• Requirements are set for all types of nuclear installation with nuclear reactor generally,

graded approach is applied

• PSR requirements will be part of legal framework (Atomic Act + Decrees) and they will be

applied with graded approach on RRs

• Requirements for PSR introduced into legal framework:
• New Atomic Act (legal effect in 2017)
• § 47 Safety assessment
• Sec. 1 - Nuclear safety shall be assessed during a life cycle of a nuclear

installation regularly, systematically a comprehensively. This assessment shall be verifiable and be documented.

• Sec. 2 - Nuclear safety assessment shall include periodic safety review.

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New regulatory requirements for PSR and their application on RRs (1/4)

Periodic Safety Review Process for Research Reactors

New regulatory requirements for PSR and their application on RRs (2/4)

New Decree of Nuclear Safety Assessment (common for NPPs and RRs as well) –

specifies requirements on PSR set in Atomic Act

The general requirements for conducting of PSR

• PSR shall
• assess a level of nuclear safety, radiation protection, technical safety, radiation monitoring and accident

management according to the legal requirements and state of the art science and technology and the best practice

• be carried out according to a strategy developed in advance
• review a status of operation phase and decommissioning
• include definition of set of safety requirements and corresponding acceptance criteria
• include evaluation of safety significance of identified deviations and specify corrective actions accordingly and

schedule for their implementation

• verify if all deviations identified during operation or decommissioning or during previous PSR have been resolved

Terms to carry out PSR

• The first PSR no later then 6 years after start of operation, then in 10 years intervals and at the every phase of

decommissioning Scope of PSR

• 14 safety factors according to IAEA Safety Standards Series No. SSG-25
• NPPs – all safety factors
• RRs - scope of safety factors commensurate to design and operation features, + additional SF Experiments

Subject of PSR

• Subject of PSR is specified for each Safety Factor (IAEA Safety Standards Series No. SSG-25)

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Periodic Safety Review Process for Research Reactors

Subject of PSR on RRs

• § 14 Sec. (2) nuclear facilities without a nuclear reactor or with the nuclear reactor

with a power lower than 50 MW shall use graded approach for setting the scope of periodic safety review according to the characteristics of the project of a research reactor and the method of operation of a research reactor: 1. the actual use and utilisation of RR and predicted modifications and changes 2. the appropriateness of existing internal regulations 3. the efficiency in processes and activities management 4. documentation changes 4. effects of the use and utilisation of the RR on its nuclear safety, radiation protection, technical safety, radiation monitoring, managing radiological emergencies and security and physical protection 5. the appropriateness of OLC 6. process of ageing management 7.

• perational staff training and qualification

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New regulatory requirements for PSR and their application on RRs (3/4)

Periodic Safety Review Process for Research Reactors

New regulatory requirements for PSR and their application on RRs (4/4)

Documentation required for Periodic Safety Review

(1) Strategy of PSR (2) Methodologies for each safety factor (3) Records of the PSR – results of individual safety reviews (4) Partial reports from PSR – results of individual areas review (5) Final report – shall be submitted to SÚJB latest 3 months after finishing the PSR process Final Report shall include a) brief description of PSR process, objectives, scope, procedures, used resources and documentation, b) for other than the first PSR factors according to status during the previous PSR, c) a summary of the results and findings giving all deviations from safety requirements and corresponding corrective measures, d) conclusion on the overall level of nuclear safety, radiation protection, technical safety, monitoring of radiation situation and management of radiological emergencies achieved in the period under review, e) an action plan for implementation of the corrective measures, including a schedule.

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Periodic Safety Review Process for Research Reactors

PSR on research reactor (example – Slovenia 250 kW TRIGA Mark II)

• PSR is mandatory and implemented on RR – like a condition for issuing the licence for
• peration (periodicaly repeated every 10 years)
• PSR is prepared corresponding to IAEA document SSG-25 PSR for Nuclear Power Plants and

WENRA requirements.

• Graded approach is applied.
• Duration of PSR - 36 months
• Inspections of SSCs - did not recognize any inappropriate safety relevant issues
• During PSR visual and ultrasonic inspection of the reactor vessel was performed
• Visual inspection of all inner surfaces, welds, bolting materials and internal components
• Detection of possible degradation processes (corrosion, cracks and mechanical deformations)
• By reviewing of 14 safety factors 100 findings has been detected and merged to 85

corrective actions or improvements

• Schedule for taking corrective actions in 5 next years
• PSR costs and costs of undertaking corrective messures in total - 700 000€

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Periodic Safety Review Process for Research Reactors

Schedule of relicencing the LVR-15 and LR-0

Part of the preparedness for application for License as evaluation of the previous operation will be performing of the PSR, in the case of LVR-15 also INSARR mission.

• Design of criteria for PSR to Office (30 September 2017)
• Agreeing on the criteria for the PSR (31 December 2017)
• Self Assessment (31 December 2018)
• Documentation for INSARR (30 March 2019)
• Execution of INSARR (30 June 2019)
• Results of INSARR (30 September 2019)
• Results of PSR (31 December 2019)

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Periodic Safety Review Process for Research Reactors

Conclusion

• Performing of PSR is currently required only for NPPs by force of conditions of
• perating license.
• PSR is implemented on NPPs, and will be implemented on RRs with application
• f graded approach.
• New legal basis will include requirements on PSR for both, NPPs and RRs,

according to new legislative demands – Atomic Act and Nuclear safety Decrees.

• Challenge – application of graded approach for PSR on RRs and setting the best

possible grading in performing PSR on RRs.

• The new IAEA guide for PSR on RRs will be helpful tool for making the

application process easier.

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Periodic Safety Review Process for Research Reactors

You will be welcomed in Prague, Czech republic

Periodic Safety Review Process for Research Reactors

Thank you for your attention

Contact details email: michal.hodan@sujb.cz tel.: +420 221 624 232 State Office for Nuclear Safety Senovážné nám. 9, Praha 1 Czech Republic

Periodic Safety Review Process for Research Reactors