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IFPE/CNEA-MOX-RAMP, CNEA Power Ramp Irradiations with (PHWR) MOX Fuels

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Program name Package id Status Status date
IFPE/CNEA-MOX-RAMP NEA-1626/01 Arrived 13-OCT-2000

Machines used:

Package ID Orig. computer Test computer
NEA-1626/01 Many Computers
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The irradiation of the first MOX nuclear fuel rods fabricated in Argentina began in 1986. These experiences were made in the HFR-Petten reactor, Holland. The six rods were fabricated in the a Facility (GAID-CNEA-Argentina).


The first rod has been used for destructive pre-irradiation characterization in the KFK (Kernforschungszentrum Karlsruhe), Germany. The second one was a pathfinder for calibrating HFR systems in Petten. Two other rods included pellets doped with iodine. The first contained mostly CsI whilst the second contained elemental iodine. The concentration of iodine was intended to simulate a burn-up of 15000 MWd/ton(M).


The power histories were defined from calculations performed with the BACO code. A 15 day cycle was assumed with a power history that induced PCMI during power cycling. The last high power period was maintained until stress corrosion cracking (SCC) was induced. Two further un-doped rods were used in a sub-program named BU15. Here a burn-up of 15000 MWd/ton(M) was achieved at a low power followed by a final power ramp for one of the rods. The ramp was similar to that used for the Iodine test.


The HFR irradiation was conducted satisfactorily. The objective was to attempt a correspondence in behaviour between the doped rods and BU15 rods. PIE detected the presence of microcracks inside the cladding of the iodine doped rods.


Ramping of the BU15 rod was interrupted when an increase of coolant activity was detected. After discharge, a visual inspection of the rod showed the presence of a small circular hole in the cladding. Additional PIE showed that the hole was due to a SCC failure.

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Package ID Status date Status
NEA-1626/01 13-OCT-2000 Masterfiled restricted
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NEA-1626/01, included references:
- Armando Carlos Marino, Edmundo Perez and Pablo Adelfang:
Irradiation of Argentine (U,Pu)O2 MOX fuels. Post-irradiation results and
experimental analysis with the BACO code, Journal of Nuclear Materials 229
(1996) pp169-186
- Armando Carlos Marino: PHWR Mox Fuel Experiments and the IFPE, OECD/NEA NSC
Expert Group Meeting on Scientific Issues in Fuel Behaviour Co-organised by
OECD/NEA and IAEA Cadarache, France 25 September 2000
- D. Geithoff: CNEA Fuel Pin Experiment A3/A4, Results of the Post-Irradiation
Examination, PSB-Ber. IV 775 (April 1989)
- S. McAllister, J. Markgraf and B. Seaber: Power History of the
Pre-Irradiation Phase in the HFR Core, Technical Memorandum HFR/92/4914
(Petten, 25 March 1992)
- S. McAllister, J. Markgraf and B. Seaber: Power History of the
Pre-Irradiation Phase in the PSF, Technical Memorandum HFR/92/4927 (Petten, 26
March 1992)
- J. Markgraf and B. Seaber: Power History of the Power Ramp Test in the PSF,
Technical Memorandum HFR/92/4948 (Petten, 27 March 1992)
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No specified programming language
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Dr. Armando Carlos MARINO

CNEA Centro Atomico Bariloche

8400 San Carlo de BARILOCHE, Rio Negro



Review: J.A. Turnbull

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A3.DAT     5 zone irradiation history for rod A3
A4.DAT     5 zone irradiation history for rod A4
A12.DAT    5 zone irradiation history for rod A1.2
A13.DAT    5 zone irradiation history for rod A1.3
PATH.DAT   Irradiation history for PATHFINDER rod
A-MOX.SUM Description of the experiments
QA report for Argentine MOX experiment in the HFR Petten
READ.ME    Readme file
\PHWR_MOX_1a Data and electronic documentation
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Keywords: data, experimental data, fuel rods, irradiation.