Requirements management in licensing process for IFMIF-DONES. Antti Rantakaulio, Jaakko Iivanainen

Transcription

1 Requirements management in licensing process for IFMIF-DONES Antti Rantakaulio, Jaakko Iivanainen

2 We offer a wide range of nuclear services Our expertise is based on nuclear experience since the 1960 s Highly efficient software Apros for simulating all processes of a power plant and testing I&C; different simulators. Method of system engineering ADLAS for licensing and safety systems design. Consulting for safety upgrade, power upgrade, lifetime extensions, new-build projects. One of the World s most effective solutions for purification of radioactive liquids NURES Methods ReMaint for optimization of maintenance activities and execution of annual outages to increase nuclear plants availability and safety. Solutions for interim storage and final disposal of nuclear waste. Decommissioning services. Applications of virtual reality, augmented reality, 360 video for training and more efficient maintenance and projects execution. 2

3 Licensing of nuclear facility Is part of the lifecycle of the facility Design, construction, commissioning, operation, decommissioning Idea is to show that the facility is safe to operate To workers, public and environment Key elements of design phase Requirements management Design, regulatory requirements, codes and standards etc Safety analysis Safety demonstration (of independence and strength of Defencein-Depth levels) in the licensing documentation 3

4 Licensing in Finland Construction license, operating license, periodical safety reviews Nuclear Energy Act, YVL Guides etc Licensing documents PSAR/FSAR etc Also, fulfillment of regulatory requirements has to be shown Requirements management Fortum s experience Loviisa NPP: I&C modernization, safety upgrades External projects: Hanhikivi-1 etc 4

5 Requirements management Way to communicate For example stakeholders have interests of the project/product Car shall have four wheels Car shall two turning wheels There are different requirements, some examples: Technical e.g. the product/project outcome Process e.g. how the product/project outcome is achieved Functional e.g. shall move only in x direction Non-functional shall be pink Regulatory body has different requirements Acceptance criteria - e.g. dose limits Also, usually have specific technical requirements e.g. N+1 criteria Refer to standards etc 5

6 Requirements management Modern approach is to give hierarchy and traceability for: Design Requirements Verification and validation Clear and transparent processes Transparent requirement elaboration from regulatory requirements to actual design requirements in different levels of hierarchy Also, connecting V&V results to design requirements Fulfillment of requirements is shown! Requirements management process connects 6

7 Fortum s participation in requirements management EUROfusion IFMIF-DONES in WPENS project In 2017 Purpose of the feasibility study was to investigate the traceability of the plant s safety functions and safety requirements and to propose recommendations for requirements management using the Electrical Power System (EPS) as an example In 2018 Continue investigation of traceability of requirements and develop feasibility study further One interesting topic is the safety classification of SSCs 7

8 Example of requirement traceability Requirements for redundancies of EPS: Plant Design Requirements: A number of relevant level of requirements will apply to SIC systems (e.g. design, quality functional, integrity, redundancy, monitoring) depending on the required safety function. System Requirement Document: Electrical Power Supply: SIC-1 loads: they will be powered from both conventional Electric Distribution System and from Emergency Power System. It has been considered that all SIC-1 loads will be redundant (2x100%), and that each redundant load will receive power supply from its own electric redundancy of the Electric Distribution System. And this requirement is taken into account in design, Design Description Document: Electrical Power Supply: The SIC emergency power supply is divided into two trains, A and B, which meet the requirements stated in section in terms of redundancy, independence and segregation. Requirement is traced to the plant level 8

9 Questions? 9