This gives you a brief insight of ProSIM's Seismic capabilities. For in-depth details, feel free to contact us. We would be happy to help you!

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SEISMIC QUALIFICATION OF
EQUIPMENTS FOR
NUCLEAR POWER PLANT APPLICATIONS

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ABOUT ProSIM
• ProSIM is an NPCIL approved consultant for stress analysis for 3 years.
• Successfully executed more than 40 projects in qualification for seismic conditions.
• Mechanical & Electrical Equipments (Passive & Active equipments).
• Expertise in qualification of Class-1, 2, 3 & NINS equipments.
• Worked with DAE entities like IGCAR/BARC/BHAVINI and their vendors
• Worked for international agencies – ITER/AMEC
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• ProSIM has proven expertise of using commercial FEA codes Ansys/Abaqus.
• Develop macros for using qualification codes within the environment of Ansys / Abaqus
or CAD software such as Catia/NX or general platforms such as MathCAD and so on.
• Implementation of macros in Ansys for load combination for seismic qualification for
different service levels.
• Macros embedded XL sheets for weld, bolt and support qualifications.
Post processing and calculating various types of damages as per RCCM-R standards.
• Customized platform using ABAQUS to generate the design, verify design by FEM
analysis and generate qualification report for pressure vessels.
ProSIM STRENGTHS

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As a seismic consultant, ProSIM takes complete responsibility by engaging at various stages:
• Developing the seismic methodology
• Identify the loads applicable to the specific equipment
•Spectra based analysis (or) codal calculations
• Qualification as per ASME code
• Suggest design modifications to enable seismic qualification (with consultation with vendor &
NPCIL)
• Detailed documentation in NPCIL formats.
• Provide necessary technical support for discussions with certifying agencies (even after project
closure)
ProSIM as Seismic Qualification Consultant
EQUIPMENT LIST (Qualified)
•Vessels/Tanks (>40)
•Cylindrical
•Annular
•Vertical
•Horizontal
•Leg support
•Saddle support
•Overhanging
•Valves
•Pneumatic control valve
•Butterfly valve
•Dual check plate valve
•Ball valves
•Lattice tower supported chimney

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•Complete DG set with alternator (and auxiliaries)
•HSD day tank
•LT water buffer tank
•Thermowells
•Duplex Filters
•Pre-heating module
•Plate-type heat exchangers
•Electrical Equipments
•Control Panels
•Cable tray support structures
•Bus ducts
•Process Equipments
•Chopper
•Dissolver
•Centrifuge
•Electrolyser
•Scrubbers
•Compressors & Pumps
•Triplex plunger pump
•Compressor
•Hydraulic Power Units
EQUIPMENT LIST (contd...)
•Special Equipments
•Glove boxes
•Thermosyphon evaporator
•Shielding door
•Dissolver
•Evaporators
•Chiller condenser
•Automated Fuel Transfer System
•Filters & Strainers
•High capacity coolers
•Spent Fuel Chopper machine
•Huge Steel structure (>700 tons)
•Emergency water system
•Air conditioning & ventilation system
including AC ducting & fans
•Centrifugal Extractor
•Spray column
•Liquid ring vacuum pumps

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PAST PROJECTS
(PARTIAL LIST)

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TANKS (partial list)
Electrolyser Scrubber Pot type Evaporator Thermo-Syphon Evaporator
Horizontal – saddle supports Vertical - leg supports Cylindrical - Lug supports Annular - Lug supports

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VERTICAL TANK (details)
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•Eigen value analysis with missing mass
correction
•Dynamic analysis carried out for sloshing effects
•Housner model is used to adequately represent
the behavior
•Shell qualified as per ASME Sec III, ND
•Supports qualified as per ASME Sec III, NF
•Embedded plate size checks
•Weld adequacy checks
•impulsive mass, mi
•convective mass, mc
•mass of water, mw
•height of mi from bottom, hi
•height of mc from bottom, hc
•maximum height of fluid, h
•spring stiffness, Kc
Sloshing effect modeling

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SADDLE SUPPORTED TANKS
•Overall length of tank: 6202mm
•Outer diameter: 2324mm
•Nozzle sizes : 8NB, 15NB, 20NB, 25NB, 50NB

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GLOVE BOX
•Negative internal pressure
•OBE & SSE (seismic loads)
•Contains Nitric Acid
•High temperature load
•Titanium grade material
DISSOLVER

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CAD & FE-MODEL
•Transient heat transfer analysis
performed.
•The region connecting the internal
pipes within the hot leg to the base
plate is critical.
HEAT-EXCHANGER TUBES &
BAFFLE PLATES MODELLED
USING SHELL ELEMENTS
THERMO-SYPHON EVAPORATOR

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FUEL CYCLE : VESSELS & SUPPORT
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25m
40m
10m

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Complete DG SET
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Parts considered for
qualification:
- Base frame (skid)
- Engine crank case
- Alternator assembly
- Crank shaft
- Turbocharger support
- Turbocharger
- Fly wheel
- Flexible coupling
- Oil sump
•Analysed for running forces on
cylinder
•Bearings & couplings modeled.
•Alternator short circuit load
simulated.
•Bolts & weld adequacy checked at
all crucial regions
•Functional operability

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COMPRESSOR
DAMPENERS AND PURGE BOTTLES QUALIFIED BASE FRAME
FE model with
lumped mass
connections

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•Weight = 5069 kg
•Modifications suggested after high stress observed in legs, cooler
coils & body
Initial Design
High stress in HE
AIR COOLER
Modified Design
Reduced stress after modification

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•Visited site (RAPP) to check availability of usable EPs and
area around the building
•Designed the tower from scratch
•Strength design of columns.
•Strength design of bracings.
•Strength design of stacks.
•Strength design of structure foundation bolts.
•Strength design of structure base plate and gussets.
•Pull out shear failure mode of foundation.
LATTICE TOWER SUPPORTED CHIMNEY
3 exhaust pipes entering the tower Silencer arrangement on the roof Complete lattice tower

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For more information:
Contact us :
info@pro-sim.com
ProSIM R&D Pvt. Ltd.,
#4, 1st ‘B’ Main, 1st ‘N’ Block, Rajajinagar, Bangalore 560010, India
Phone: +91-80 233 230 20 / 412 777 92-93