This title appears in the Scientific Report :
2008
Eine interdisziplinäre Studie zum Einfluss der Betriebsbedingungen im Reaktorsicherheitsbehälter auf die Wirksamkeit von katalytischen Wasserstoffrekombinatoren
Eine interdisziplinäre Studie zum Einfluss der Betriebsbedingungen im Reaktorsicherheitsbehälter auf die Wirksamkeit von katalytischen Wasserstoffrekombinatoren
At the Emsland nuclear power station, a total of 58 autocatalytic hydrogen recombiners were backfitted in 1999 as an additional measure of risk reduction in connection with major hydrogen releases after events going beyond the design basis. Annual in-service inspections after 2002 revealed that some...
Saved in:
Personal Name(s): | Kelm, St. |
---|---|
Reinecke, E.-A. / Dornseiffer, J. / Hofmann, D. / Leistner, F. / Schoppe, L. / Jühe, S. | |
Contributing Institute: |
Troposphäre; ICG-2 Zentralabteilung für Chemische Analysen; ZCH Sicherheitsforschung und Reaktortechnik; IEF-6 |
Published in: | Atw, 53 (2008) S. 254 - 257 |
Imprint: |
2008
|
Physical Description: |
254 - 257 |
Document Type: |
Journal Article |
Research Program: |
Atmosphäre und Klima Nukleare Sicherheitsforschung |
Series Title: |
ATW - internationale Zeitschrift für Kernenergie
53 |
Subject (ZB): | |
Publikationsportal JuSER |
At the Emsland nuclear power station, a total of 58 autocatalytic hydrogen recombiners were backfitted in 1999 as an additional measure of risk reduction in connection with major hydrogen releases after events going beyond the design basis. Annual in-service inspections after 2002 revealed that some of the catalyst sheets developed startup delays and marked evolutions of smoke and smell. Recombiners not meeting the inspection criterion were completely regenerated as a measure of precaution.A preventive study was conducted jointly with institutes of the Julich Research Center and the Aachen Technical University to analyze the composition of the deposits, which was then compared with the chemical characteristics of potential sources in the reactor containment. At the same time, the influence on effectiveness of the catalyst sheets was examined.On the basis of a random evaluation of the in-service inspection logs of the past few years, representative samples were taken whose startup behavior and operating characteristics were studied in a test rig alongside chemical analyses so as to allow a correlation to be established between the analytical findings and the catalytic activity of the samples. The findings made allowed internal sources of the catalyst deposits to be excluded. The impurities are introduced with the outside air. As a consequence, the air ducts in the vicinity of the respective recombiners were inspected and optimization steps were taken in connection with in-service inspections and regeneration procedures. |