NUCLEAR POWER PLANT LIFE MANAGEMENT

Transcription

1 Hauptabteilung für die Sicherheit der Kernanlagen HSK NUCLEAR POWER PLANT LIFE MANAGEMENT Materials and Components, Research, Human Resource, Radwaste and Regulatory Aspects October Ph. Tipping (a), D. Kalkhof (a), B. Raj (b), T. Jayakumar (b) and B.P.C. Rao (b) a) Swiss Federal Nuclear Safety Inspectorate (HSK), HSK-Villigen, CH 5232, Switzerland b) Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam , India address : TP@hsk.ch

2 Objectives of PLiM Objectives of PLiM Gains in safety, reliability and performance of SSCs by giving due emphasis to social and economic considerations. To apply PLiM Programme Sate of science and technology information/ approaches Well trained personnel in sufficient numbers to achieve safe and optimized operating life of the NPP. No. of NPPs Operational Reactors by Age Age, Years 2

3 Various Factors influenced to NPP life Technical and regulatory constraints Safety-related issues Life-time of nonreplaceable components Pressure vessel, containment... A major accident, wherever it happens Plant-specific or political pressure. Lack of cost-effectiveness Sale of electricity/heat does not cover cost of operation. Absence of industrial support Industry capacity for replacement SSC cannot cover demand. Lack of skilled personnel Dried-out human resource market Loss of public acceptance 3

4 General Approach to PLiM Feasibility Study, Life assessment of key SSCs, Regulatory requirements, Economic analysis, Detailed NPP life evaluation and establishment of PLiM programme. Set up screening criteria Understand ageing mechanisms. Replacement: Functional equivalence ALARA Principles Replacement or refurishment of SSCs At least functional equivalence and maintain or even increase the safety level. Re-qualification of new SSCs Regulatory acceptance SSCs Components Available? Consideration of Obsolescenct compoentns 4

5 Role of Research in PLiM Programmes Improved materials and inspection/monitoring techniques Reliability and Safety of NPP SSCs over the last 50 years. Modification of the environment : important factor determining degradation mechanisms A multi-disciplinary approach is essential. 5

6 Human Resource Requirements for PLiM Consider a significant effects of skilled or trained personnel for NPPs construction Establish management strategies to plan for H/R development programme in a timely manner Evolved ways to capture the people-centred tacit knowledge of retirees. NPPs should record, document, store and retrieve the personnel s expertise, trade and skills and share it with other personnel. 6

7 Radwaste management Long term operation will entail continual monitoring, inspections and replacements as well as strategies to deal with radioactive wastes generated. Spent fuel storage capacity must be sufficient 7

8 Regulatory Aspects in PLiM NPP with a continually updated ageing management and PLiM programme, Recognized by a regulator as having the necessary depth, focus on safety Allows for the developments in science and technology Utility is actively pursuing a policy of maintaining or increasing safety, Plants that have a history of forced outages through spontaneous failure or unexpected deterioration rates of SSC safety margins Receive correspondingly more regulatory attention Operational restrictions and could cause economic penalties 8

9 Conclusions Apply the state of art science and technology Results of experience, lessons-learned and advances in understanding of materials and human behaviour. Need the continued basic research materials selection, treatment and component fabrication methods. More Focus on crucial, large passive, non-replaceable items Maintenance, replacement, monitoring and regular servicing schedules with ageing management Consider NPP design Ease of access for inspection of installed SSCs facilitates enhanced data generation and insights. 9

10 Conclusions Examine all safety-relevant issues. Recruit new personnel is a vital management task Attracting talented and highly motivated young professionals through mentoring and other recruitment drives is essential knowledge management, capturing the tacit knowledge before retirement or loss of skilled personnel. Configuration management for Documentation control international efforts should be increased to create a common and comprehensive programme for the development in the area of nuclear technology and safety, which also includes ageing management, PLiM and LTO 10

11 Issues to be discussed with Panelists Technical cooperation among research organizations, utilities and University to develop human resource Research area through international cooperation Develop the technical guidelines Improved material application Residual Life time assessment to Passive components Regulatory Aspects Periodic safety review (PSR) for long term operation How can apply Licensing Renewal Application approach to NPPs outside USA Radwaste management 11

12 Request to Each Panellist Each panellist will explain his main idea on the main issues raised by chairman during 7 min Explain specific idea on the issued topics Find and discuss the differences among each panellists' talking and idea. Questions from audiences Find the common area from their explanation and facilitate concerns to discuss Summarize the discussion results 50 Min 35 Min Recommendations to the IAEA 12