MODULE “PREPARING AND MANAGEMENT OF DOCUMENTATION” SAFE DECOMMISSIONING OF NUCLEAR POWER PLANTS...

MODULE “PREPARING AND MANAGEMENT OF DOCUMENTATION”

SAFE DECOMMISSIONING OF NUCLEAR POWER PLANTS

Project BG/04/B/F/PP-166005, Programme “Leonardo da Vinci”

Project BG/04/B/F/PP-166005, Programme “Leonardo da Vinci” 2

CONTENTS

1. Decommissioning plans:- conceptual plan;

- decommissioning plan;

- plan for final shut down of the nuclear facility.

2. Reports associated with decommissioning

Project BG/04/B/F/PP-166005, Programme “Leonardo da Vinci” 3

TRAINING OBJECTIVES

Upon completion of training trainees should be able to: Describe the structure and main parts of decommissioning

documentation. Explain the scope and content of the Conceptual Plan and the

Decommissioning Plan. Explain the scope and content of the Plan for Final Shut Down of the

Nuclear Facility. Describe the structure and the scope of the Decommissioning Safety

Analysis Report. Describe the structure and the scope of the Environment Impact

Report. Describe the structure and the scope of the Final Decommissioning

Report.

Project BG/04/B/F/PP-166005, Programme “Leonardo da Vinci” 4

STANDARD REGULATIONS

Holder of permit (licensee) for selection of site, design, construction, commissioning and licensee for nuclear facility operation develop initial and interim concepts and plans for nuclear facility decommissioning.

Stressing on the ethical principles – not to accrue burden on future generations in result of today’s generation activities – requires speeding up of decommissioning process.

Nuclear facility decommissioning is based on a concept used as a basis for choosing optimum and safe option for main activities performance and implementation phases during decommissioning.

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CONTENTS OF CONCEPT Long-term decommissioning concept; Technical measures and modifications facilitating

decommissioning activities:• appropriate layout of facilities, systems and components;• structural materials, equipment and systems easy to decontaminate.

Preliminary analyses and assessments of decommissioning impact on population and environment;

Financial assurance substantiation:• preliminary evaluation of needed finances;• ways and mechanisms to provide needed financial means and their

management in accordance with local current standard regulations.

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THE CONCEPT – A DEMONSTRATIVE INFORMATION DOCUMENT

Expected status of sites and equipment; Volume and activity of radioactive materials and waste; Radiological status; Decommissioning activities; Environmental status; Expected impact of activities on environment; Activities to decrease unfavorable impact; RAW and spent fuel management; Evaluation of advantages and disadvantages of different options.

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A CONCEPT PRIOR TO NUCLEAR FACILITY COMMISSIONING

Contains updated information related to:• existing facility status;• technologies for RAW and spent fuel management.

Defines requirements for registration and archiving of information important for preparation for decommissioning;

Contains detailed substantiation of changes in option selections, if any.

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DECOMMISSIONING PLAN – BASIS FOR DEVELOPMENT

Safety analysis report; Good practices, results, documents and data received in

the process of ongoing planning; Results of other analyses, studies and projects related to

decommissioning, including environmental impact assessment;

Analyses and substantiations that cover and justify availability, technical status, operational lifetime, and preparedness to perform the functions of existing systems and safety related equipment.

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DECOMMISSIONING PLAN – IMPROVED CONCEPTUAL PLAN

Based on the concept; Contains description of social aspects; Contains the two options for technical solution; Contains zero option in case of failure to implement

decommissioning.

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CONTENTS OF DECOMMISSIONING PLAN

Short description of main plan components; Description of facility and site; Description of conditions and events that occurred during operations

and reasons for decommissioning; List of standards used for decommissioning planning; Radiological criteria at decommissioning; Substantiation of selected decommissioning option; Schedule and description of decommissioning activities; Evaluation of generated radioactive and other hazardous materials; Classification of safety related systems and equipment for different

decommissioning phases; Description of planned modifications of existing systems and new

systems needed for decommissioning;

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CONTENTS OF DECOMMISSIONING PLAN – CONTND.

Description of decontamination activities; Description of technologies and technical means; RAW management program; Safety assessment program; Radiation protection concept; Radiation monitoring programs; Description of organization and responsibilities; Quality assurance program; Plant emergency plan; Documents identifying measures for physical protection; Evaluation of needed financial resources; Monitoring programs upon completion of decommissioning; Schedule for reporting to BNRA.

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MAIN TECHNICAL AND ECONOMIC PARAMETERS

Process costs per cause nature:• Costs for industrial activities;• Costs depending on time;• Single costs.

Labour-consuming; Stuffing; Duration of the process.

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PARAMETERS CHARACTERISING IMPACT ON STAFF

Individual exposure dose:• External radiation;• Absorbed radiation.

Collective exposure dose.

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ENVIRONMENT IMPACT PARAMETERS

Gaseous releases; Liquid releases.

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PARAMETERS CHARACTERIZING THE NEED FOR WASTE DISPOSAL

Quantity of generated by-product waste; Possibility for temporary storage of waste; Number of containers with conditioned RAW for pre-

surface disposal; Number of containers with conditioned RAW for disposal

in deep geological formations; Possibilities for long-term storage of waste prior disposal.

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OTHER PARAMETERS

Weight of the metal for unlimited usage; Weight of re-cycled material generated during demolition

of construction sites; Volume of non-radiated material; Weight of contaminated metal for disposal; Liquid waste generated during decommissioning; Solid waste generated during decommissioning; Consumption parameters.

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DOCUMENTS DEVELOPED DURING DECOMMISSIONING

Plan at the stage of final shutdown of a nuclear facility Required documentation for granting a permit at

decommissioning phase Plan of a phase during decommissioning

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OBJECTIVES OF FINAL SHUTDOWN DOCUMENTATION

Identification of safe, reliable and efficient method of operation of equipment needed at that phase;

Identification of equipment and sites not needed for further operation;

Identification of methods for shutdown and safe separation of equipment.

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FINAL SHUTDOWN DOCUMENTATION - CONTENTS

Description of new supporting venting systems or restoration of available systems;

Description of maintenance, repair and reconstruction; Installation of modular boxes; Installation of laundry equipment and RAW treatment

equipment; Erection of disposal facilities; Implementation of new monitoring systems.

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DOCUMENTATION FOR GRANT OF PERMIT (LICENSE) FOR DECOMMISSIONING

Identification data of the applicant; Type of requested permit (license); Term of permit (license); General description of site main

characteristics; Data for administrative acts; List of attached documents.

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ATTACHMENTS TO APPLICATION

Legal documents; Documents concerning the applicant; Substantiation of term duration; List of applicable standards; Safety assessment report; Decommissioning plan; Operational regulations; Operational procedures; Decision on the assessment of environment impact.

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DOCUMENTS FOR PERMITION OF A PHASE DURING DECOMMISSIONING

Updated decommissioning plan for corresponding phase; Activity organization and implementation plan; Operational regulations; Operational procedures; Updated SAR for the phase.

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CONSTITUENT PARTS OF PHASE PLAN

Results of radioactive control; Program for control; Substantiation of changes in operating limits and

conditions; Substantiation of selected equipment.

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TYPES OF PHASE PLANS

Plan for preparation of safe enclosure phase; Plan for safe enclosure phase; Plan for finishing phase.

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SAFETY ASSESSMENT REPORT

Description of nuclear facility and its ambient media; Concept for decommissioning; Spent fuel management; Radioactive waste and other hazardous materials

management; Radiation protection; Release from control of materials; Legal requirements; Description of decommissioning activities;

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SAFETY ASSESSMENT REPORT – CONTND.

Description of decommissioning technologies; Description of the new and reconstructed systems; Safety analyses; Description of hazardous substances inventory; RAW description and classification; Description of radioactive releases; Monitoring program; Description of procedures for radiological protection of

staff; Description of organization of decommissioning.

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ENVIRONMENT IMPACT ASSESSMENT REPORT

Structure similar to the one of safety report; Compares several options of decommissioning process; Covers in details decommissioning costs and losses; Developed on the basis of updated decommissioning

conceptual plan.

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FINAL DECOMMISSIONING DOCUMENTATION

Final report; Site radiological status assessment; Application for issuance of permit for release of nuclear

facility:• Description of nuclear facility status;• Description of decommissioning activity;• Report on professional exposure doses;• Inventory of radioactive materials;• Inventory of materials cleared from regulatory control;• List of retrieved information;• Report on final radiological survey and independent review report.

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REFERENCES

Decommissioning of Nuclear Power Plants and Research Reactors, Safety Guide, SS № WS-G-2.1 (1999)

Organization and Management for the Decommissioning of Large Nuclear Facility, TRS № 399 (2000)

The Decommissioning of WWER-Type Nuclear Power Plants, IAEA-TECDOC-1133 (2000)

Act on the Safe Use of Nuclear Energy, 2002 Regulation for the Safety of the Decommissioning of

Nuclear Facilities, 2004 Regulation for the Procedure for Issuing Licenses and

Permits for Safe Use of Nuclear Energy, 2004