Method of nondestructive monitoring of fuel-element seal tightness
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A method of monitoring the seal tightness of fuel elements is described. The method is based on determining leaks of gaseous fission products during annealing of preirradiated samples. The basic steps using this method are described and mathematical expressions for determining the constants of the activation model of the leakage of gaseous fission products, which is used for processing and analyzing experimental results, are presented. The measurements results obtained using the method develop are compared with the results obtained in reactor tests of spherical fuel elements. An example using the technique is described: simulators, for which the temperature dependence of 135Xe leakage (to 1400 K) is obtained and a quantitative relation between the number of microfuel elements with damaged coatings and leakage of gaseous fuel products, are tested. It is found that technological contamination of graphite of the simulators by uranium is present.
KeywordsFission Product Fuel Element Uranium Dioxide Seal Tightness Momot
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- 1.G. V. Momot, V. F. Solenkov, and A. A. Khrulev, Inventor’s Certificate No. 950066, Class G21c17/06, “Method of determining the seal tightness of fuel element,” Byul. Otkr., Izobr., Prom. Obraz., Tov. Znaki, No. 29, 262 (1982).Google Scholar
- 2.OST 95 10315-2003, Monitoring Seal Tightness of Fuel Elements of High-Temperature Gas-Cooled Reactors (HTGR), Russian Science Center Kurchatov Institute (2003).Google Scholar
- 3.N. N. Ponomarev-Stepnoi and A. A. Khroulev, “Release of fission products from high temperature fuel elements,” in: 3rd Int. Conf. Therm. Electr. Generation, Session E-129, Julich, FRG (1972), pp. 1–7.Google Scholar
- 5.A. I. Smirnov,V. M. Talyzin, and V. I. Khvostionov, “Solution reactor for activation analysis,” Preprint IAE-1692 (1968).Google Scholar
- 6.“Fuel sample annealing stand OSA,” in: Proc. Int. Conf. Profiles of Facilities Use for HTR Research and Testing, IAEA, Vienna (1980), pp. 312–315.Google Scholar
- 7.G. V. Momot, A. A. Khrulev, V. P. Shmelev, et al., “Effect the contamination of structural elements of fuel elements by fuel on the seal tightness of HTGR fuel element,” Vopr. At. Nauki Tekhn. Ser. At.-Vodor. Energet. Tekhn., No. 1(14), 22–27 (1983).Google Scholar
- 8.M. M. Kozyrev, G. V. Momot, and A. A. Khrulev, “Method of weak irradiation as a means of technological development of microfuel and fuel elements based on them,” Vopr. At. Nauki Tekhn. Ser. Yad. Topl. Tekhnol., No. 6, 54–60 (1990).Google Scholar