IMPROVEMENT OF EXPERIMENTAL FACILITIES AND THE REPLACEMENT OF EQUIPMENT FOR THE HIGH FLUX REACTOR PETTEN, THE NETHERLANDS
A major reactor refit has now been successfully completed. The project has taken some 61 years from concept to recommissioning the reactor in the new vessel with a revised core. This paper will outline the experimental pressures which led to the conceptual vessel design adopted in 1979 at the start of the design phase of the project, and will show how these initial requirements have been met. During the design phase, much evolution took place in the safety logic, against which the replacement vessel was designed, fabricated and tested. An outline of these newer safety requirements and the solutions adopted will be given. Inadequate basic design data for a suitable aluminium alloy for the new vessel was available. A metallurgical programme was initiated to provide the missing data. A summary of this work will be given. Decommissioning of a 45 MW facility had not been previously attempted. The successful removal of the obsolete vessel, beam tubes and thermal column equipment will be described, together with an outline of the supporting development trials, which were completed before the active removal work itself was attempted. The paper will show that these operations can be performed at reasonable costs and acceptable man rem burdens. An update on about 15 months experience in operation of the new installation and core arrangement will be given.
Bibliographic Reference: FOURTH INTERNATIONAL ENS-ANS CONFERENCE, GENEVE (SWITZERLAND), JUNE 1-6, 1986 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32632 ORA
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Record Number: 1989124127700 / Last updated on: 1987-01-01
Available languages: en