NEA-1502 IFPE/RISOE-II.

1. NAME OF EXPERIMENT:  IFPE/RISOE-II.

3. DESCRIPTION

The RISO National Laboratory in Denmark have carried out three irradiation programs of slow ramp and hold tests, so called 'bump tests' to investigate fission gas release and fuel microstructural changes. The second project took place between 1982 and 1986 and was called "The RISO Transient Fission Gas Project".
The fuel used in the project was from: IFA-161 irradiated in the Halden BWR (27 to 42 MWd/kgUO2) and GE BWR fuel irradiated in the Millstone 1 reactor 14 to 29 MWd/kgUO2.
Using the refabrication technique, it was possible to back fill the  test segment with a choice of gas and gas pressure and to measure the time dependence of fission gas release by continuous monitoring  of the plenum pressure. The short length of the test segment was an  advantage because, depending on where along the original rod the section was taken, burnup could be chosen variable, and during the test the fuel experienced a single power.

More specifically the tests are characterized as follows:

-------------------------------------------------------------------
Test    Fuel      Burn-up         BTL   Fill Gas FGR %  Comment
        Segment   %FIMA MWd/kgUO2 kW/m    bar
-------------------------------------------------------------------
Riso-a M78-1-39 4.66 37.27 39.8 1 Xe (14.0) Clad failure

Riso-b  M23-1-6    4.36  34.87    40.0   1 Xe    15.3       -

Riso-e  M23-1-9    4.62  36.95    41.6   5 He    24.9   Long hold
                                                        time

Riso-h  M23-1-17R  3.36  26.81    40.4   1 Xe    16.7       -

Riso-i  M23-1-21R  5.29  42.31    40.1   1 Xe    13.3       -

Riso-k  M38-8R     3.35  26.79    40.7   1 Xe    24.6   Large gap

Riso-l  M73-2-8R   3.33  26.63    39.8   5 He    15.7   Large gap

GE-a    STR017-3R  3.4   28.54    42.4   5 He    18.8       -

GE-b    STR017-5R  3.5   29.38    38.7   1 Xe    19.7       -

GE-g    STR025-3   3.1   26.02    42.3  16 He    18.2       -

GE-h    STR018     3.1   26.02    42.7  17 He     5.1   Long hold
                                                        unopened

GE-i    STR026     3.1   26.02    43.6  17 He     7.3   Long hold
                                                        unopened

GE-l    STR016-4R  3.1   26.02    42.0   5 He    19.3   With power
                                                        dips

GE-k    STR019-8   2.3   19.31    42.5   5 He    30.0   With peaks
                                                        to 50 kW/m

GE-m    STR013-8R  1.7   14.27    41.7   5 He    11.1   With power
                                                        dips

GE-n    STR027-7R ** not included because of failure during test **

GE-o    STR025-5R  3.2   26.86    44.5   5 He    33.8       -
-------------------------------------------------------------------
Note: BTL refers to Bump Terminal Level (Power)

    RISO-x  were tests using fuel irradiated at HRP/BWR (IFA-161)
    GE-x were tests using fuel irradiated at the GE BWR Millstone 1

4. METHOD OF SOLUTION:

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:

6. TYPICAL RUNNING TIME:

7. UNUSUAL FEATURES OF THE PROGRAM:

8. RELATED AND AUXILIARY PROGRAMS:

- J. Borring:
Pre-Irradiation Data on IFA 161 Fuel Pins
RISOE-TFGP-R1 (March 1983)
- R.L. Yang and E.V. Hoshi:
GE Data Package
RISOE-TFGP-R2 (January 1984)
- R.L. Yang:
Amendment to GE Data Package
RISOE-TFGP-R2, Amend. (July 1986)
- I. Misfeldt:
Base-Irradiation of IFA 161
RISOE-TFGP-R3 Rev. (September 1984)
- I. Palmer, C. Bagger and M. Mogensen:
Amendment to Base-Irradiation of IFA 161
RISOE-TFGP-R3 Rev, Amend. (November 1986)
- C. Bagger:
Non-Destructive Examination of IFA 161 Fuel Pins
RISOE-TFGP-R4 (January 1984)
- M. Mogensen and C. Bagger:
Radiochemical Burnup Determination of IFA 161 Fuel
RISOE-TFGP-R5 (January 1984)
- C. Bagger:
Post Base-Irradiation Profilometry and Gammascanning of GE fuel Pins
RISOE-TFGP-R6 (June 1984)
- C. Bagger:
Non-Destructive Examination Bump Tests with Risoe Fuel
RISOE-TFGP-R7 (October 1985)
- C. Bagger:
Radiochemical Burnup Determination on GE Fuel
RISOE-TFGP-R8 (March 1986)
- B.S. Johansen and I. Misfeldt:
Bump Tests with Risoe Fuel
RISOE-TFGP-R9 (April 1986)
- B.S. Johansen and I. Misfeldt:
Bump Tests with GE Fuel
RISOE-TFGP-R10 (June 1986)
- C. Bagger:
Non-Destructive Examination of Bump Tests with GE Fuel
RISOE-TFGP-R11 (March 1986)
- H. Carlsen:
Fission Gas Release and Retention in Risoe Fuel Pins
RISOE-TFGP-R12 (March 1986)
- H. Carlsen:
Fission Gas Release and Retention in GE Fuel Pins
RISOE-TFGP-R13 (March 1986)
- C. Bagger:
Diametral Micro Gamma Scanning of Unbumped and Bump Tested Risoe Samples
RISOE-TFGP-R14 (May 1986)
- C. Bagger:
Diametral Micro Gamma Scanning of Unbumped and Bump Tested GE Samples
RISOE-TFGP-R15 (May 1986)
- H. Carlsen:
Ceramography on Risoe Fuel
RISOE-TFGP-R16 (December 1986)
- H. Carlsen:
Ceramography on GE Fuel
RISOE-TFGP-R17 (December 1986)
- C. Bagger:
Quantitative Image Analysis of Risoe Fuel
RISOE-TFGP-R18 (April 1986)
- C. Bagger:
Quantitative Image Analysis of GE-Fuel
RISOE-TFGP-R19 (May 1986)
- C.T. Walker, W. Ziehl and R. Windbiel:
Microprobe Analysis Results for the Risoe Fuel
RISOE-TFGP-R20 (April 1986)
- C.T. Walker, W. Ziehl and R. Windbiel:
Microprobe Analysis Results for the GE Fuel
RISOE-TFGP-R21 (April 1986)
- M. Mogensen:
Radial Xe Distribution in Risoe Fuel as Measured by X-Ray Fluorescence
RISOE-TFGP-R22 (April 1986)
- M. Mogensen:
Radial Xe Distribution in GE Fuel as Measured by X-Ray Fluorescence
RISOE-TFGP-R23 (April 1986)
- P. Knappik:
SEM Investigation of Gas Bubble Nucleation and Growth in the PIN Section
STR018-20
Risoe-TFGP-R24 (April 1986)
- I.L.F. Ray and M. Coquerelle:
Fission Gas Bubble and Porosity Analysis for Risoe Fuel Sections
RISOE-TFGP-R25 (December 1986)
- I.L.F. Ray and M. Coquerelle:
Fission Gas Bubble and Porosity Analysis for GE Fuel Sections
RISOE-TFGP-R26 (May 1986)
- I.L.F. Ray, H. Thiele and W. Huber:
Tem Analysis of the Risoe Fuel Section M23-1-6-6
RISOE-TFGP-R27 (January 1987)
- P. Knudsen et al:
Final Report on the Risoe Transient Fission Gas Release Project Volume 1
RISOE-TFGP-R29, Vol. 1 (December 1986)
- P. Knudsen et al:
Final Report on the Risoe Transient Fission Gas Release Project Volume 2
RISOE-TFGP-R29, Vol. 2 (December 1986)

11. MACHINE REQUIREMENTS:

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

15. ESTABLISHMENT OF AUTHORS

     Risoe National Laboratory
     P.O. Box 49
     DK-4000 ROSKILDE
     DENMARK

     Compilation: J.A. Turnbull, UK

PRECHAR.*.*  Precharacterization data for each test
BASIRRA.*.*  Base irradiation
BASIRRB.*.*  A 5 axial zone base irradiation history for the test section
TESTPOW.*.*  Linear heat rating
P&FGR.*.*  Hot pressure and fission gas release
PIE-RI   Compilation of PIE data for tests on Riso fuel
PIE-GE   Compilation of PIE data for tests on GE fuel
EPMA.*.*  Measurement of retained xenon concentration (measured by EPMA at TUI)
MGS.*.*  Measurement of retained 137-Cs concentration (measured by microgamma
scanning)
XRF.*.* Measurement of retained xenon concentration (measured by X-ray
fluorescence)
Description of the data and readme file