Community Research and Development Information Service - CORDIS


The LWR testing facilities at the HFR Petten have been extended for testing of pre-irradiated and re-instrumented LWR fuel rods. This contribution relates to the re-instrumentation technique of pre-irradiated fuel rods with pressure sensors for the purposes of (i) investigation of the transient fission gas release mechanism and fuel rod internal pressure behaviour during transient testing and steady state power operation, and (ii) failure detection on fuel rods during transient tests or in LOCA tests. The re-instrumentation heads with pressure sensors and a gas filling tap are remotely welded to the fuel rods in the hot cells. The welding is then checked for integrity and leaks. Subsequent connection between the fuel rod plenum and pressure monitoring system is performed by an integrated drill in the re-instrumentation head. After transportation to the HFR, the re-instrumented fuel rod is remotely loaded into the standard LWR fuel rod testing facilities. Following completion of the irradiation testing at HFR, the fuel rod is returned to the hot cells for further examinations. The hot cell assembly device and re-instrumentation heads, the re-instrumentation technique and experience and examples of applications are discussed.

Additional information

Authors: PERRY D J, JRC Petten (NL);FISCHER B, JRC Petten (NL);MARKGRAF J F W, JRC Petten (NL);PUSCHEK P, JRC Petten (NL);DE HAAN K W, Netherlands Energy Research Foundation (ECN), Petten (NL)
Bibliographic Reference: Paper presented: Annual Meeting of the EC Working Group on Hot Cells, Karlsruhe (DE), Sept. 27-28, 1989
Availability: Available from (1) as Paper EN 35069 ORA
Record Number: 199010031 / Last updated on: 1994-12-01
Original language: en
Available languages: en