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Abstract

The project of replacing the HFR originated in 1974 when results of several research programmes confirmed severe neutron embrittlement of aluminium alloys suggesting a limited life of the existing facility. This report contains the detailed chronology of events concerning preparation and execution of the replacement. After a 14 months' outage the reactor resumed routine operation on 14th February, 1985. At the end of several years of planning and preparation the reconstruction proceded in the following steps: - unloading of the old core, decay of short-lived radioactivity December 1983 - removal of the old tank and of its peripheral equipment January - February 1984 - segmentation and waste disposal of the removed components March - April - decontamination of the pools, bottom penetration overhauling May - June - installation of the new tank and other new components July - September - testing and commissioning, including minor modifications October - December - trials runs and start-up preparation January - February 1985 The new HFR Petten features increased and improved experimental facilities. Among others the obsolete thermal column was replaced by two high flux beam tubes. Moreover the new plant has been designed for future increases of reactor power and neutron fluxes. For the next three to four years the reactor has to cope with a large irradiation programme, claiming its capacity to nearly 100%.

Additional information

Authors: CHRYSOCHOIDES N G, JRC PETTEN ESTAB. (THE NETHERLANDS);CUNDY M R, JRC PETTEN ESTAB. (THE NETHERLANDS);VON DER HARDT P, JRC PETTEN ESTAB. (THE NETHERLANDS);HUSMANN K, JRC PETTEN ESTAB. (THE NETHERLANDS);SWANENBURG DE VEYE R J, JRC PETTEN ESTAB. (THE NETHERLANDS);TAS A JRC PETTEN ESTAB. (THE NETHERLANDS), JRC PETTEN ESTAB. (THE NETHERLANDS)
Bibliographic Reference: EUR 10194 EN (1985) FS, 127 P., BFR 200, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
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