TECHNICAL REPORT 92-14 - Nagra

NAGRA NTB 92-14 - VIII -
Contents
SUMMARY I
ZUSAMMENFASSUNG ill
RESUME v
Contents Vill
1 High level nuclear waste overpacks under extreme geological loading conditions:
the work performed within the COMPAS project 1
1.1 Introduction to the COMPAS project 1
1.2 Benchmark exercises. . . . . 3
1.2.1 Thin-walled overpack 3
1.2.2 Thick-walled overpack with uniformly corroded profile 5
1.2.3 Thick-walled overpack with non-uniformly corroded profile. 6
1.2.4 Thick-walled overpack with uniformly corroded and cracked
profile .... 6
1.3 Preliminary ring tests ............ 7
1.4 Intermediate tests on simplified scale models 11
1.5 Advanced tests on scale models of typical overpacks 14
2 Thermomechanical calculation of residual stresses due to welding using the
finite element method 17
2.1 NAGRA reference design for the high level nuclear waste overpack. 17
2.2 Material properties . . . 18
2.2.1 08-40 cast steel 18
2.2.2 Uniaxial tension tests 19
2.2.3 Creep tests. . . . . . 22
2.2.4 Implementation of the material properties into a finite element
calculation . . . . . . . . . . . . . . . . . . . . . . . . . . .. 22