seismic qualification of nuclear power plant equipments

engineering your designswww.pro-sim.com

SIMULATED DESIGNED DELIVERED

[email protected]

SEISMIC QUALIFICATION OF

EQUIPMENTS FOR

NUCLEAR POWER PLANT APPLICATIONS

Date : 10 September 2015

Venue : NPCIL (NUB), Anushaktinagar - Mumbai

Attendees : Engineering & Procurement teams of NPCIL

(Mechanical & Electrical)

engineering your designswww.pro-sim.com 2

ISO 9001:2008

Core Group of Automotive Research (CAR – TIFAC)

DSIR (Govt of India) recognized R&D House

Recognitions

Certifications

2JSTP Japan Award

EPMA 2003 ( Spain ) – Poster Award

Best Paper Award in PM India Conference

Awards

22 Publications in International Conferences & Journals

26 + Invited Lecturers in technical forums in India, Germany, UK, USA and

Japan

Publications


Domestic Customers (Partial list)

150 + Customers

9 Verticals


Global Customers (Partial list)

Unisca Jecs


ProSIM has an interdisciplinary team of :

Mechanical Engineers, Materials, Design, Manufacturing, Electrical Electronics, FEM experts,

Optimization experts, Pressure vessel designers, consultants and so on

4 PhDs with 15-35 years of exp

14 M Tech / MS

~38 Engineers

~40 Trainees

ProSIM Team

ProSIM adds significant value to its customer in various stages of product life cycle.

* Design stage

* Value engineering

* Failure analysis

* Maintenance stage (remaining life assessment)


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

6

• 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


•4.2 MW 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

•Chopper for FBTR fuel

•Dissolver for FBTR fuel

•Centrifuge for FBTR fuel

•Electrolyser for FBTR dissolver

•Evaporator off gas scrubber

•Vessel off gas scrubber

•Compressors & Pumps

•Triplex plunger pump

•ECCS compressor

•Hydraulic Power Units

EQUIPMENT LIST (contd...)

•Special Equipments

•Glove boxes

•Thermosyphon evaporator

•Shielding door

•Dissolver

•Automated Direct Fuel Transfer System

•Filters & Strainers

•Fuelling machine & pump room coolers

•Spent Fuel Chopper (39-pin)

•Steel structure (Sodium testing)

•Fuel Cell piping

•Emergency water system

•Air conditioning & ventilation system

including AC ducting & fans

•Centrifugal Extractor

•Chiller condenser (EOG, DOG, WVOG

•Spray column

•Evaporator - Pot type

•Evaporator - Thermosyphon type

•Sump Pump

•Liquid ring vacuum pumps


PAST PROJECT CASES

(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)

11

•Eigen value analysis with missing mass

correction

•Dynamic analysis carried out for sloshing effects

•Housner model 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

•Internal parts lumped

•Negative internal pressure

•Dead weight

•OBE & SSE (seismic loads)

•Contains Nitric Acid

•High temperature gradient load

•Titanium grade material

DISSOLVER


CAD & FE-MODEL

•Transient heat transfer analysis.

•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


FUEL CYCLE : VESSELS & SUPPORT

15

25m

40m

10m


4.2 MW DG SET

16

Parts considered for

qualification:

- Base frame (skid)

- Engine crank case

- Alternator assembly

- Crank shaft

- Turbocharger support

- Turbocharger

- Fly wheel

- Flexible coupling

- Oil sump

•Checked for allowable

stress limits of the material

as per manufacturer’s

standard engineering

practice.

•Functional operability

checked


ECCS COMPRESSOR

DAMPENERS AND PURGE BOTTLES QUALIFIED BASE FRAME

FE model with

lumped mass

connections


•Weight = 5069 kg

•Peak spectral acceleration = 6g

•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


#4, 1st B Main, 1st N Block

Rajajinagar, Bengaluru - 560 010

Phone: +91 80 2332 3020

[email protected]

www.pro-sim.com

mailto:[email protected]

