TY - CONF A1 - Erhard, Anton A1 - Wüstenberg, Hermann A1 - Mundry, Eberhard T1 - 90°-Longitudinalwellen-Winkelprüfkopf zum Nachweis oberflächennaher Risse T2 - Europäische Tagung für Zerstörungsfreie Materialprüfung CY - Mainz, Deutschland DA - 1978-04-24 PY - 1978 VL - 1 SP - 107 EP - 114 PB - Deutsche Gesellschaft für Zerstörungsfreie Prüfung CY - Berlin AN - OPUS4-8982 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erhard, Anton A1 - Wüstenberg, Hermann A1 - Mundry, Eberhard T1 - 90°-Longitudinalwellen-Winkelprüfkopf zum Nachweis oberflächennaher Risse T2 - DGZfP Europäischen Vortragstagung Zerstörungsfreie Materialprüfung CY - Mainz, Germany DA - 1978-05-08 PY - 1978 AN - OPUS4-18793 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Erhard, Anton A1 - Schuler, X. A1 - Otremba, Frank T1 - A new concept for steam generator tube integrity assessment N2 - Steam generator (SG) tubes are part of the primary circuit of pressurised water reactors and therefore also part of the pressure retaining boundary components. Furthermore, steam generator tubes are the components which guarantee the separation between the primary and secondary circuits. Therefore the knowledge of the loss of tube integrity as soon as possible is an essential. Optimised nondestructive testing methods based on the eddy current array technique are used to find material degradation, especially intergranular stress corrosion cracks during the periodical in-service inspection. These methods are supported by the measurement of the leakage rate during operation based on radioactivity and Tritium measurement regarding a high crack grows. Shutdown criteria depending on leakage rates which are described in the operation procedures but there are no specifications about the conditions for the measured leakage. Is the leakage coming from a single crack or are there multiple cracks or is this the leakage of a critical crack. With the help of FE calculations answer about the uncertainties of leakage rate versus critical crack grows were found. Shutdown criteria must guarantee to avoid critical crack sizes, i.e. between the measured tritium activity and the critical crack size must be a safety gap. KW - Steam generator tubes KW - Crack detection KW - Non destructive testing KW - Axial cracks KW - Critical crack sizes KW - Crack opening area KW - Leakage PY - 2012 U6 - https://doi.org/10.1016/j.nucengdes.2012.04.014 SN - 0029-5493 SN - 1872-759X VL - 249 SP - 297 EP - 303 PB - North-Holland Publ. Co. CY - Amsterdam AN - OPUS4-26025 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Erhard, Anton A1 - Kutzner, Jürgen A1 - Wüstenberg, Hermann A1 - Mundry, Eberhard T1 - Abhängigkeit der Echoanzeige von nutartigen Reflektoren vom Prüfkopfschallfeld und von der Frequenz PY - 1979 SN - 0340-7551 VL - 9 IS - 1 SP - 11 EP - 12 PB - Bundesanstalt für Materialprüfung CY - Berlin AN - OPUS4-9176 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Erhard, Anton A1 - Kutzner, Jürgen A1 - Wüstenberg, Hermann A1 - Mundry, Eberhard T1 - Abhängigkeit der Echoanzeige von nutartigen Reflektoren vom Prüfkopfschallfeld und von der Frequenz PY - 1977 SN - 0025-5300 VL - 19 IS - 9 SP - 379 EP - 382 PB - Carl Hanser Verlag CY - München AN - OPUS4-8759 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erhard, Anton A1 - Kutzner, Jürgen A1 - Wüstenberg, Hermann A1 - Mundry, Eberhard T1 - Abhängigkeit der Echoanzeige von nutartigen Reflektoren, Prüfkopfschallfeld und von der Frequenz T2 - DGZfP-Vortragstagung 1977 CY - Bremen, Germany DA - 1977-05-16 PY - 1977 AN - OPUS4-18791 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erhard, Anton A1 - Völzke, Holger A1 - Wolff, Dietmar T1 - Ageing Management - very long term storage of used nuclear fuel T2 - Technical Meeting on "Very long term storage of used nuclear fuel" CY - Vienna, Austria DA - 2011-04-26 PY - 2011 AN - OPUS4-23791 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erhard, Anton A1 - Völzke, Holger A1 - Probst, Ulrich A1 - Wolff, Dietmar T1 - Ageing management for long term interim storage casks T2 - PATRAM 2010 - 16th International symposium on the packaging and transport of radioactive materials CY - London, UK DA - 2010-10-03 KW - Ageing management KW - Lifetime KW - Material degradation PY - 2010 SP - 1 EP - 17 (Tuesday/T20/61) AN - OPUS4-23907 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Erhard, Anton A1 - Völzke, Holger A1 - Wolff, Dietmar A1 - Probst, Ulrich T1 - Ageing Management for Long Term Interim Storage Casks T2 - PATRAM 2010, 16th International Symposium on the Packaging and Transport of Radioactive Materials CY - London, England DA - 2010-10-03 PY - 2010 AN - OPUS4-22227 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Erhard, Anton A1 - Völzke, Holger A1 - Probst, Ulrich A1 - Wolff, Dietmar T1 - Aging management for long-term interim storage casks N2 - The aging management system for the mechanical components of nuclear power plants (NPPs) must be established and used by the licensee in such a way that the quality of safety relevant components is guaranteed for the completely designed lifetime of the NPP. This demands an extensive plant life management with special emphases on the knowledge of the degradation in material properties. The basic safety concept in Germany observes this circumstance. Lifetime extension of the German NPPs is an aim of the current valid coalition agreement of the German government. Operational extension of interim storage facilities requires, in comparison to the aging management system for NPP, an aging management system adapted to the Special circumstances of spent fuel storage casks. Extension of interim storage periods for spent fuel casks beyond the designed lifetime requires, in comparison to the components of an NPP, an increasing knowledge of material degradation with potential impact on cask integrity, e.g. leak tightness. Dry interim storage in Germany has been approved for 40 years. After that time, according to the present strategy, a final repository should be available. However, until now, such a final facility still does not exist, and the German exploration and licensing process is heavily delayed. Currently, discussions are continuing regarding further exploration of the Gorleben salt mine. There is willingness to overcome this situation that is clearly described in the available coalition agreement of the federal government. Anyway, however, the prediction is viewed; a repository for heat generating radioactive waste in Germany will not be available in the near future and may not be available when first storage facilities and casks reach their 40 years of approved lifetime, which will occur in ~25 years starting from now. Therefore, the question must be asked: what has to be done with the existing storage casks in the interim facilities? May these casks be fit for continued use, with an extension of the storage period? One option is to have an aging management system, which creates enough information about the technical condition of safety relevant cask properties. This is the basis for safety evaluation for extended storage periods. In the present paper, possible aging mechanisms for high level waste storage casks are discussed, as well as the influence of the time dependent changes of the component properties. KW - Long term interim storage KW - Storage casks KW - Aging mechanisms KW - Degradation mechanisms KW - Metal seals KW - Larson-Miller parameter PY - 2011 U6 - https://doi.org/10.1179/1746510910Y.0000000013 SN - 1746-5095 SN - 1746-5109 SN - 0957-476X VL - 22 IS - 1 SP - 46 EP - 53 PB - Ramtrans Publ. CY - Ashford AN - OPUS4-23890 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -