-sesi-7-analisis integritas struktur menggunakan msc nastran
TRANSCRIPT
Analisis Integritas Struktur MenggunakanProgram MSC Software
Roziq Himawan
Pusat Teknologi Reaktor dan Keselamatan NuklirBadan Tenaga Nuklir Nasional
Pusat Teknologi Reaktor dan Keselamatan Nuklir
1. Bidang Fisika dan Teknologi Reaktor
2. Bidang Pengembangan Reaktor
3. Bidang Pengkajian Analisis Keselamatan Reaktor
4. Bidang Pengembangan Teknologi Keselamatan Nuklir
5. Bidang Operasi Fasilitas
Bidang Pengembangan Teknologi Keselamatan Nuklir
Melakukan kegiatan penelitian terkait dengan
1. Analisis Sistem Keselamatan Instalasi Nuklir
2. Analisis Keandalan Instalasi Nuklir
3. Pengembangan Budaya Keselamatan dan Ergonomika
Analisis Keandalan Instalasi Nuklir
Melakukan Litbang integritas struktur untuk menjamin keselamatan reaktor
Desain Struktur suatu Reaktor PWR
Desain Struktur Sistem PendinginPrimer PWR
Fasilitas untuk Analisis Integritas Struktur
Perangkat keras (Mesin Uji Mekanik)1. Mesin Uji Tarik Universal2. Mesin Uji Tarik Dinamik (Fatik)3. Mesin Uji Creep4. Mesin Uji Impak (Charpy)5. Alat uji metalografi6. Berbagai alat uji NDT
Fasilitas untuk Analisis Integritas Struktur
Perangkat Lunak1. MSC Patran → FEM Computer Code Biasa2. MSC Fatigue → Analisis disain fatik3. MSC Marc → Non-linier analysis4. MSC Multi Discipline5. Caesar II → Piping Stress 6. Catia7. Item Tool Kit → Software analisis keandalan8. Software analisis Human Factor
MSC Fatigue
MSC FatigueResults :
1. Life Estimation2. Log of Life3. Damage4. Component Specific Life Unit5. Factor or Safety6. Multiaxiality Indicators
MSC Marc
1. Geometric Nonlinearity ● Structural Instability and Collapse
● Large deflections ● Large rotations ● Preloads
MSC Marc
2. Contact Nonlinearity ● Rigid Body Contact ● Deformable body contact ● Contact with friction
MSC Marc
3. Material Nonlinearity ● Plasticity ● Progressive failure ● Creep
MSC MultiDiscipline
1. Motion-structural Mechanics2. Systems and Control3. Thermal Mechanical4. Multiphysics5. Implicit-Explicit-Implicit6. Fluid-Structure Interaction
Pemanfaatan dalam PLTN
1. Structural analysis of nuclear core support structures and concrete containment structures.2. Structural analysis of mechanical components and equipment : Pressure vessels, pumps, valves, piping systems and storage Tanks.3. Vibration analysis of equipment and components4. Drop testing of nuclear waste disposal casks5. Impact analysis of critical systems from fragments due to Accidental explosions6. Blast analysis of structural systems due to bomb blast7. Impact analysis of exterior structures due to acts of terorisms
Hasil Analisis untuk Komponen Reaktor
Gambar Bottom Head Instrument Penetration dan Model 2D
Hasil Analisis untuk Komponen Reaktor
Reactor Reactor CoreCore
NeutronNeutron
Non-ductile fracture must be avoided.Deterministic analysis method is prescribed in
Codes/Standards.
ECCS Water Injection
High Stress due to Pressure and Rapid Cooling
Fracture Toughness Degradation due to Neutron
Irradiation
In-service Inspection(non-detection probability)
RPV
PTS
Temp.
Inside Outside
Stress at Crack Tip
Vessel Wall
Cold E
CC
S W
ater Fracture T
oughness
KI,KIc
Temperature at crack tip
KI histories analyzed through a PTS transient
An axial crack having 10mm depth and 60mm length is assumed in RPV wall.
(Japanese procedure)
Fracture Toughness (KIc) > Stress Intensity Factor (KI)
Regulations require that the fracture toughness is maintained in an enough level throughout the plant operation.
In addition to the prediction of fracture toughness decrease, ∆RTNDT have to be monitored by the surveillance tests during plant operation.
Safety Margin
Initial (Unirrad.) KIc
KI
40 years operation
60 years
∆RTNDT
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