(BMUB) on Topical Peer Review Ageing Management of Nuclear Power Plants
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Report by the Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety (BMUB) on Topical Peer Review Ageing Management of Nuclear Power Plants and Research Reactors Publisher: Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety (BMUB) Division RS I 5 · PO box 12 06 29 · 53048 Bonn · Germany E-Mail: [email protected] Website: http://www.bmub.bund.de Editors: Division RS I 5 (General and Fundamental Aspects of Reactor Safety, Nuclear Safety Codes and Standards, Multilateral Regulatory Cooperation) Date: 28th December 2017 Contents Contents List of Figures ................................................................................................................................. V List of Tables .................................................................................................................................. VI Abbreviations ................................................................................................................................ VII Executive Summary ........................................................................................................................ 1 Preamble ....................................................................................................................................... 2 1 General information ..................................................................................................... 3 1.1 Nuclear installations identification ................................................................................... 3 1.2 Process to develop the national assessment report ....................................................... 7 2 Overall ageing management programme requirements and their implementation ............................................................................................................ 8 2.1 German national regulatory framework ........................................................................... 8 2.2 International standards ................................................................................................. 12 2.3 Description of the overall ageing management programme ......................................... 12 2.3.1 Scope of the overall AMP .......................................................................... 12 2.3.1.a Nuclear power plants ................................................................................. 12 2.3.1.b Research reactors ...................................................................................... 15 2.3.2 Ageing assessment .................................................................................... 15 2.3.2.a Nuclear power plants ................................................................................. 15 2.3.2.b Research reactors ...................................................................................... 17 2.3.3 Monitoring, testing, sampling and inspection activities .............................. 18 2.3.3.a Nuclear power plants ................................................................................. 18 2.3.3.b Research reactors ...................................................................................... 20 2.3.4 Preventive and remedial actions ................................................................ 21 2.3.4.a Nuclear power plants ................................................................................. 21 2.3.4.b Research reactors ...................................................................................... 22 2.4 Review and update of the overall AMP ......................................................................... 23 2.4.a Nuclear power plants ................................................................................. 23 2.4.b Research reactors ...................................................................................... 24 2.5 Licensee’s experience of application of the overall AMP .............................................. 25 2.5.a Nuclear power plants ................................................................................. 25 2.5.b Research reactors ...................................................................................... 25 2.6 Regulatory oversight process ....................................................................................... 26 Contents 2.7 Regulator’s assessment of the overall ageing management programme and conclusions ................................................................................................................... 30 2.7.a Nuclear power plants ................................................................................. 30 2.7.b Research reactors ...................................................................................... 32 3 Electrical cables ......................................................................................................... 33 3.1 Description of ageing management programmes for electrical cables ......................... 33 3.1.1 Scope of ageing management for electrical cables ................................... 33 3.1.1.a Nuclear power plants ................................................................................. 33 3.1.1.b Research reactors ...................................................................................... 34 3.1.2 Ageing assessment of electrical cables ..................................................... 35 3.1.2.a Nuclear power plants ................................................................................. 35 3.1.2.b Research reactors ...................................................................................... 39 3.1.3 Monitoring, testing, sampling and inspection activities for electrical cables ......................................................................................... 40 3.1.3.a Nuclear power plants ................................................................................. 40 3.1.3.b Research reactors ...................................................................................... 41 3.1.4 Preventive and remedial actions for electrical cables ................................ 42 3.1.4.a Nuclear power plants ................................................................................. 42 3.1.4.b Research reactors ...................................................................................... 43 3.2 Licensee’s experience of the application of AMPs for electrical cables ........................ 43 3.2.a Nuclear power plants ................................................................................. 43 3.2.b Research reactors ...................................................................................... 44 3.3 Regulator’s assessment and conclusions on ageing management of electrical cables ............................................................................................................................ 45 3.3.a Nuclear power plants ................................................................................. 45 3.3.b Research reactors ...................................................................................... 48 4 Concealed pipework .................................................................................................. 49 4.1 Description of ageing management programmes for concealed pipework ................... 49 4.1.1 Scope of ageing management for concealed pipework ............................. 49 4.1.1.a Nuclear power plants ................................................................................. 49 4.1.1.b Research reactors ...................................................................................... 50 4.1.2 Ageing assessment of concealed pipework ............................................... 51 4.1.2.a Nuclear power plants ................................................................................. 51 4.1.2.b Research reactors ...................................................................................... 55 4.1.3 Monitoring, testing, sampling and inspection activities for concealed pipework ................................................................................... 56 4.1.3.a Nuclear power plants ................................................................................. 56 4.1.3.b Research reactors ...................................................................................... 59 Contents 4.1.4 Preventive and remedial actions for concealed pipework .......................... 60 4.1.4.a Nuclear power plants ................................................................................. 60 4.1.4.b Research reactors ...................................................................................... 60 4.2 Licensee’s experience of the application of AMPs for concealed pipework .................. 61 4.2.a Nuclear power plants ................................................................................. 61 4.2.b Research reactors ...................................................................................... 62 4.3 Regulator’s assessment and conclusions on ageing management of concealed pipework ........................................................................................................................ 62 4.3.a Nuclear Power plants ................................................................................. 62 4.3.b Research reactors ...................................................................................... 64 5 Reactor pressure vessels ........................................................................................