RRFM 2009 Transactions - European Nuclear Society

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(a) (b) Fig. 2. (a) low and (b) high magnification TEM images of the ordered bubbles observed in a U-7Mo particle at zone [135]. The inset in (a) is a selected area diffraction (SAD) pattern that contains rings due to the presence of oxides that formed at the U-7Mo fuel particle locations of the sample. (a) (b) Fig. 3. TEM image (a) and electron diffraction pattern (b) produced from a characterized U-7Mo particle. The inset in (b) shows the satellite spots that indicate the presence of a bubble super lattice at zone [113]. 432 of 455
Fig. 4. TEM image showing relatively large fission gas bubbles present in a U-7Mo fuel particle. 3.2.2 Characterization of the U-7Mo/matrix interaction layers TEM micrographs of the interaction layer are presented in Fig. 5. A weak beam dark field image using the diffused ring was generated to show the extremely fine microstructural features present in the interaction layer, and a SAD pattern was generated to show that the interaction layer was amorphous. In addition, bright field images in focused, under-focused and overfocused conditions were generated to show the high density of < 2-nm-sized bubbles that were present in the interaction layer. These bubbles are likely the fission gas bubbles. A final lowmagnification TEM image is presented to show the interaction layer between the Al-2Si matrix and the U-7Mo fuel particle. Compositional analysis was performed in different areas of the interaction layers to determine the variability of the Si content within the layers. Figures 6 and 7 shows the areas within the interaction layers where compositional analysis was performed, and Tables 1 and 2 enumerate the results of this analysis. From this data it can be seen that there is a variability in the Si content within the interaction layer, along with the U, Mo, and Al. The highest concentrations measured in the interaction layer for U, Mo, Al, and Si were approximately 19, 9, 90, and 12 at %, respectively. It appears that the areas of the interaction layers with the fewest small fission gas bubbles were also the most enriched in Si. This may indicate a higher fission gas solubility of the material when Si concentrations are higher, which would result in less fission gas bubbles precipitating out. At some locations fission product Zr could be detected. 433 of 455
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© 2009 European Nuclear Society Ru
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RESEARCH REACTOR COALITIONS - SECON
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- Eastern European Research Reactor
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ut a comprehensive alignment of tec
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EERRI will be launched. As noted ab
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Nuclear material in the form of hig
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The GTRI domestic radiological mate
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2. State of the art For fuel plate
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It is known since the early days of
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End of 2008 first DU-8wt.%Mo (deple
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References [1] D. AB. Robinson et a
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• CNEA have been working in the f
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O 75 Bignan.doc - DI - 1 / 10 20/02
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THE EAST EUROPEAN RESEARCH REACTOR
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namely Jozef Stefan Institute TRIGA
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Information and organizational issu
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Action Item Table 3. Description (t
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Table 6. Materials/fuel test experi
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In a recent development, it should
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1. Introduction: a renewed context
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interaction, close retention of fis
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3.3 Reference concept and alternati
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changes can be caused by void swell
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For its manufacturing, an additiona
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minor actinides (MA) considered as
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In France, the decision to build a
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eactors (HFR, OSIRIS and then JHR)
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DECOMMISSIONING PROGRESS OF THE DOU
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SECURITY OF SUPPLY FOR FISSION MEDI
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But the worst crisis developed by e
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IRE and COVIDEN are following close
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Fig 1. Design of the core and refle
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Table 3: Set of detailed fuel funct
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For the thermal-mechanical analysis
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Behaviour under conditions represen
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6. References [1] - MC. Anselmet, G
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2. Advanced nuclear fuel cycles The
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3.3 India In addition to the ration
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Session II Fuel Development 90 of 4
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1. Introduction Since 1957, date of
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A 3.1. Place a boron insert in a hi
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Finally, a new tool was defined and
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the end user (CEA), to define the f
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Previous papers discussed character
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(a) (b) (c) (d) (e) (f) (g) (h) (i)
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The results of a third reported irr
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In order to reproduce the heat tran
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25 OXIDE THICKNESS 20 Kim et al pH=
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Heavy ion irradiation of UMo7/Al fu
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For the lowest flux values tested d
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127 I beam 127 I beam 0 5 10 15 20
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Weight fractions (%) U(α) UO 2 γU
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activities to meet the need. The co
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Heat capacity Information Thermal c
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Decision point Activity Phase 2: Fu
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IRIS PROGRAM: IRIS4 FIRST RESULTS F
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The main characteristics of the IRI
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4. In-pool plate thickness measurem
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At that stage of IRIS4 irradiation
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extrapolated thermal property value
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optical microscope, acoustic emissi
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CD WIRES AS BURNABLE POISON FOR THE
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Figure 1. MCNP geometry model of fu
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considered carefully: (i) maintain
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discussed and validated together, k
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The as-fabrication Si contents in t
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uniform Si diffusion and consequent
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Recently, fuel relocation induced b
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characteristics of ILs obtained in
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- Type 2 (Si content ≥ 5 wt%) : c
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4. Discussion The main contribution
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METHODS OF INCREASING THE URANIUM C
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• strength properties of Zr-1% Nb
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4. References 1. Birzhevoy G.A., Ka
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Dispersion fuel Monolithic fuel ATR
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− because of its Newtonian charac
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Session III Back-end 166 of 455
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Fig.1. The transfer hall (left in c
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The shipment included all the SNF f
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FRESH AND SPENT NUCLEAR FUEL REPATR
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modifications, spent fuel inspectio
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The shipment cleared Romanian Custo
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steel are chosen as effective gamma
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Fig 3. Long lived nuclides radioact
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Session IV Innovative Methods in Re
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Lower Gr-reflector Al-clad Upper Gr
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All described fuel elements were ca
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ANALYSIS OF NEW SAFETY CRITERIA FOR
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3.2 Strain limit The value of 3.65%
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The comparison between clad tempera
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VALIDATION OF PLTEMP/ANL V3.6 CODE
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ΔT p 0.0234 2 ⎪⎧ q[W/cm ] ⎪
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Table II. Hot Channel Factors for B
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for the U-8Mo fuel meat [5]. The po
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correlation of Dittus-Boelter; the
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ROLE OF RELAP/SCDAPSIM IN RESEARCH
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SEVERE REACTIVITY INJECTION ACCIDEN
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expansion and steam formation were
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3 Conclusion Since a few years, IRS
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analysis procedure (ENAA) except vi
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References Briesmeister, J.F., 2000
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Fig. 1 A geometric diagram of NIRR-
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Fuel plate temperatures during oper
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the primary circuit in the central
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Fig. 3: Surface temperature over th
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[4] “Test Irradiations of Full Si
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The core is made of 1488 stainless
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4. Commissioning the facility for t
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ESTABLISHMENT OF A SINGLE-CRYSTAL F
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were provided to MU and INL for thi
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concrete covered with sheets of 1.2
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USE OF FISSION RADIATION IN LIFE SC
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Fig. 3. Scan of an etch track film
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Summary The unique fission neutron
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2. Methods 2.1 Reactor produced rad
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3.2 Viability studies The results o
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DESIGN OF A FLOWING-NAK EXPERIMENTA
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4. Containment rig and sample-holde
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7. Electrical heater The external h
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Page 1 / 7 EVITA: a semi-open loop
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Page 3 / 7 Fig.1: EVITA fuel Genera
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Page 5 / 7 Challenges When operatin
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Page 7 / 7 References: [1] M.C. Ans
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Nuclear Research Institutes, and so
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According to the latest IAEA inform
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18. May Training of operating perso
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2.1 Irradiation Facilities Brief te
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3.1 Detection limits Although it is
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PARTIAL DISMANTLING OF RESEARCH REA
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• Core - liable to full scale rep
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• Necessary individual dosimetry
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SILICON DOPING AT FRM II H. GERSTEN
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The resulting neutron flux density
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4. References [1] Wagner F.M., Knes
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The choice of fuel base and solutio
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3.3 Increasing power beyond current
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A COATING TO PROTECT SPENT ALUMINIU
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The treatment consisted of simple i
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5. Conclusions 1. Immersion of AA 1
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KEEPING AGING RESEARCH REACTORS IN
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inspected in presence of an expert
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After the inspection was finished,
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1 A STRATEGY FOR MANAGING AGEING CO
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3 2. With the aluminium-clad HEU fu
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5 The pool and the support structur
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Fig.2. Reflector element of JRR-4.
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Dimensional change (%) 0.6 0.5 0.4
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SAFETY CONSIDERATIONS FOR CORE MANA
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3 3. Core operation and monitoring
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5 temperature, etc.). Effective sec
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1436 keV, Cs 138 1369 keV, Na 24 2.
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compared with that of the delayed n
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AD-HOC AND PREVENTATIVE MAINTENANCE
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Page 3 of 7 3. SAFARI-1OPERATIONAL
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Page 5 of 7 programs for instrument
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Page 7 of 7 DATE DESCRIPTION DATE D
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MICROSTRUCTURAL ANALYSIS OF MTR FUE
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In sample S3, similar zones could b
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increased temperature, the solid st
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Figure 8 BEI images covering Sample
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660 °C, but since in the former me
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support. Both Governments have eval
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• Removal of sludge from the SNF
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UPGRADED REACTOR SYSTEMS FOR ENHANC
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Parameter HEU LEU a 6.0x10 -5 (°K)
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From 1992 until 2005 the TRIGA-SSR
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Figure9 - Dependency between reacto
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URANIUM CONTAMINATION IN PRIMARY CI
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1.00E+06 1.00E+05 Volume activity (
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6. Acknowledgement This work was pe
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2. Steady State Thermal Hydraulic A
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in the scram, and the respective re
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CORROSION BEHAVIOR OF ALUMINIUM ALL
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3.2. Pitting corrosion of 1050 and
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4. Discussions This study shown tha
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The Steady State core was fully con
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0.E+00 2.E+06 1.40E+07 2.E+06 1.20E
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SYNTHESIS AND CHARACTERIZATION OF G
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0 2 4 6 8 10 120 1,2 100 1,0 80 70
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Element, Wt %, At %, K‐Ratio, Z,
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U/cc, but the target uranium densit
Page 382 and 383: Fig. 5 Macroscopic cutting view (x
Page 384 and 385: SELF-ASSESSMENT OF APPLICATION OF T
Page 386 and 387: 2. The Code of Conduct on the Safet
Page 388 and 389: For emergency preparedness, conside
Page 390 and 391: inside of a compaction die by blowi
Page 392 and 393: Fig. 4. A compacted and sintered lu
Page 394 and 395: THE MANAGEMENT SYSTEM EVOLUTION OF
Page 396 and 397: etween CRPq specific process and IP
Page 398 and 399: aspect audits, mainly in relation t
Page 400 and 401: 1 2 3 4 5 6 7 8 9 A B C D E F G H F
Page 402 and 403: MCNP5 is capable of calculating ter
Page 404 and 405: Similar to the case of stainless st
Page 406 and 407: LEU FUEL DISPOSITION AT WWR-M REACT
Page 408 and 409: Tested fuel assembles are load in t
Page 410 and 411: The PNPI experience of tests with W
Page 412 and 413: CURRENT UTILIZATION AND LONG TERM S
Page 414 and 415: Uusimaa hospital district decided t
Page 416 and 417: FiR 1 has an important regional rol
Page 418 and 419: STUDYING OF INFLUENCE OF A NEUTRON
Page 420 and 421: Definition of crystal structure and
Page 422 and 423: Microhardness measurement shows, th
Page 424 and 425: THE SPENT FUEL STORAGE AT THE DALAT
Page 426 and 427: 2. Interim storage of spent fuel On
Page 428 and 429: A rotating bridge crane of 3.6-ton
Page 430 and 431: In order to investigate the perform
Page 434 and 435: (a) (b) (c) (d) (e) (f) Fig. 5. TEM
Page 436 and 437: Spot Al Si Mo U Zr G 90.6 7.8 0.6 0
Page 438 and 439: volume in the material, which affec
Page 440 and 441: THE STEREOMETRIC ANALYSIS OF GAS PO
Page 442 and 443: of the crack of pillowing). It show
Page 444 and 445: One gets the impression that during
Page 446 and 447: switch from a fast to a thermal spe
Page 448 and 449: He production to fission ratio vs t
Page 450 and 451: INSPECTION EXPERIENCE WITH IEA-R1 S
Page 452 and 453: camera system, received from IAEA i
Page 454: core in the beginning 2007 (IEA-174
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RRFM 2009 Transactions - European Nuclear Society

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