Community Research and Development Information Service - CORDIS

Abstract

Three methods of non-destructive determination (NDE) of fission gas release in LWR fuel rods will be presented: (1) A NDE method based on gamma spectrometric evaluation of 85-Kr activity in the fuel rod plenum region: This method has been applied since 1980 at HFR for all ongoing LWR transient test programmes. In addition to a description of the NDE technique used, the data from the destructive PIE and the 85-Kr method is reviewed. The 85-Kr method offers, at low costs and within a short time interval after the irradiation is terminated, the possibility of determining the fission gas release of a fuel rod exposed to multiple power ramps at different burnup levels after each consecutive transient test. (2) A quasi NDE method based upon the conventional fission gas release measuring technique, but using a laser based puncturing and welding device in a hot cell: This device provides the capability of puncturing, refilling and resealing of the puncture by welding of fuel rods, thus facilitating intermediate fission gas analysis, re-irradiation, storage and reprocessing of a non-defective fuel rod. (3) Another quasi NDE method using the conventional technique of analysing fission gas release, but providing re-instrumentation of pre-irradiated fuel rods with pressure sensors and a sampling connection with valve facilitating in-pile transient fission gas release monitoring and intermediate fission gas analysis: A new irradiation device at the HFR offers these features. The re-instrumentation procedure and the method of fission gas sampling, void volume determination and refilling will be described.

Additional information

Authors: MARKGRAF J F W JRC PETTEN ESTAB DASSEL G ENERGIEONDERZOEK CENTRUM NEDERLAND, PETTEN (THE NETHERLANDS) FISCHER G KRAFTWERK UNION A.G. (KWU), ERLANGEN RUYTER I KERNFORSCHUNGSANLAGE JUELICH GMBH WUERTZ R KWU, KARLSTEIN (GERMANY) , JRC PETTEN ESTAB;ENERGIEONDERZOEK CENTRUM NEDERLAND, PETTEN (THE NETHERLANDS);KRAFTWERK UNION A.G. (KWU), ERLANGEN;KERNFORSCHUNGSANLAGE JUELICH GMBH;KWU, KARLSTEIN (GERMANY)
Bibliographic Reference: IAEA SPECIALISTS' MEETING ON POST IRRADIATION EXAMINATION AND EXPERIENCE, TOKYO (JAPAN), NOV. 26-30, 1984 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31878 ORA
Availability: Can be ordered online
Record Number: 1989123033400 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en