Seismic capabilties - ProSIM

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SEISMIC QUALIFICATION OF EQUIPMENTS FOR

NUCLEAR POWER PLANT APPLICATIONS


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

• 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


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


• 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

engineering your designswww.pro-sim.com

PAST PROJECTS(PARTIAL LIST)


TANKS (partial list)

Electrolyser Scrubber Pot type Evaporator Thermo-Syphon Evaporator

Horizontal – saddle supports Vertical - leg supports Cylindrical - Lug supports Annular - Lug supports


VERTICAL TANK (details)

• 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


SADDLE SUPPORTED TANKS

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


GLOVE BOX

• Negative internal pressure• OBE & SSE (seismic loads)

• Contains Nitric Acid• High temperature load• Titanium grade material

DISSOLVER


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

engineering your designswww.pro-sim.com

FUEL CYCLE : VESSELS & SUPPORT

11

25m

40m

10m


Complete DG SET

12

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


COMPRESSOR

DAMPENERS AND PURGE BOTTLES QUALIFIED BASE FRAME

FE model with lumped mass connections


• 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


•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


For more information:Contact us :

[email protected]

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

mailto:[email protected]

Engineering

Seismic capabilties - ProSIM