Based upon the data from the numerous studies concerning age control and shelf life. Seismic evaluation guidance nuclear energy institute. Document complet disponible sur olis dans son format dorigine. Seismic safety assessment of existing nuclear facilities, manual no. Seismic margin analysis of inservice nuclear power plant. The clipping factors and associated clipping factor and structural response variabilities are calculated following the guidance of epri tr103959 1 and epri np 6041 sl 2. Epri 3420 hillview avenue, palo alto, california 94304. Oct 25, 2019 epri designed tomcat to be an all purpose machine, but robotics trends now call for smaller equipment to perform specific functions. Np 7376 guidelines for the use of microcomputer applications in safetyrelated activities ncig20, july 1992 np 7197 computerassisted drawing information capture, october 1991 np 6895 guidelines for the safety classification of systems, components, and parts used in nuclear power plant applications ncig17, february 1991. The outcomes of the assessment proved that the seismic margin of the reactor concrete island that accommodate the. A methodology for assessment of nuclear power plant seismic margin, epri np 6041 sl, revision 1, project 272223, final report. This document comes with our free notification service, good for the life of the document. In this methodology, high confidence of low probability of failure hclpf capacities for sscs are estimated in a deterministic manner.
Design of severe accident management systems for beyond. Epris current work covers a wide range of applications and makes use of the knowledge of research and industry partners to investigate promising technologies while lowering development costs. Safety reassessments and actions taken in hanaro since. A methodology for assessment of nuclear power plant seismic margin revision 1. The following is a small selection of items recently published by epri.
Brian seal epri intelligrid smart grid information sharing webcast january 22rd, 2014 enterprise integration of distributed energy resources. They involve calculating the median and 84th percentile nonexceedance probability nep isrs from the thirty unclipped isrs. A scaling method for generating floor response spectra. Dynamic analysis of soilstructure interaction effects on. Response spectra for equipmentstructure resonance floor response spectra for. A proven electric motor regreasing program reliabilityweb. Epri tr106439, guideline on evaluation and acceptance of commercial grade digital equipment for nuclear safety application. Eprinp5697 valve stem packing improvements document. Pdf guidance on performing a seismic margin assessment in. Seismic margin assessment methodology for npp buildings.
Epri distributed pv monitoring and feeder analysis. Epri np5223, rev 1, january 1991, generic seismic ruggedness of power plant equipment nuregcr4659, vol 4, june 1991, seismic fragility of nuclear power plant components phase ii a fragility handbook on eighteen components epri np 6041 sl, rev 1, august 1991, a methodology for assessment of nuclear power. Recent guidance developed for postfukushima activities in. Most spra and sma ipeees assessed to date have stated that epri np 6041 epri np 6041 sl. Show full abstract on earthquake experience can be compared to broadband demand spectra to develop seismic fragilities for equipment that meet the screening criteria of epri np 6041 sl. Joint ictpiaea advanced workshop on earthquake engineering for nuclear facilities james j. The horizontal incabinet response spectra are estimated using amplification factors from epri np 6041, and a new procedure is developed for estimating a vertical incabinet amplification factor. The methodology of the calculation of the frequency dependent complex functions of the soil stiffness and damping is presented.
This work combines both detailed feeder data along with field measurements to examine a wide range of pv deployment scenarios and penetration levels. To view complete lists of your companyfunded research reports, updates, software, training announcements, and other program deliverables, log in at. Nureg 5176 12 documents hclpfs for outofplane response of. For the seismic assessment of the reactor building, the epri np 6041 sl a methodology for assessment of nuclear power plant seismic margin rev. Station challenges on seismic qualification of structures. Pdf guidance on performing a seismic margin assessment. The program was designed to minimize over greasing motor bearings inbetween required bearing replacements. Application of a graded approach to support the national. Nuclear power plants, issued in august 1985 agencywide documents. Nrc seismic margin methodology with enhancements march 1, 2012jim xu and nilesh chokshi office of new reactors 1. Epris seismic margin methodology enables utility engineers to quantify a nuclear power plants ability to withstand an earthquake. Improving seismic margin assessment procedure using. Epri np5652, epri tr106439 and epri tr102260 epri np5652, guideline for the utilization of commercial grade items in nuclear safety related applications.
A methodology for assessment of nuclear power plant seismic margin rev. These models should combine reasonable considerations of wave effects in halfinfinite soil with a correct representation of nonlinearity in the structure, and in both the socalled near field, i. The national research universal nru reactor at canadian nuclear laboratories cnl operated safely for over 60 years and supported a wide range of applications including, testing of fuels and materials under typical power reactor conditions in two experimental loops u1 and u2. Epri report tr102260, supplemental guidance for the application of epri report np 5652 on the utilization of commercial grade items commercial grade item. Direct spectratospectra method generate floor response spectra, part 2. A sampling plan for commercial product testing and. Other epri guidance documents, such as np6041slr1 1991a, tr103959 1994, 1002988. Institute epri and several utilities, has produced the electric motor predictive and preventive maintenance guide, np7502, which provides guidance on how to regrease motors, when to add grease and how much grease to add. Conservative deterministic failure margin cdfm values of the critical structural elements or groups of elements were determined in orthogonal directions for different levels of the structuresflexural and shear capacities of the various elements were determined according. The program was designed to minimize over greasing motor bearings in.
Lanham pe, csp dale moon, pe fire protection chief engineer facility engineering depart. Epri np 5652, epri tr106439 and epri tr102260 epri np 5652, guideline for the utilization of commercial grade items in nuclear safety related applications. The seismic margin methodology is given in epri np 6041 sl. Next generation of soilstructure interaction models for. Seismic individual plant examination of external events of. A methodology for assessment of nuclear power plant. Recent progress of seismic practices in the us nuclear. Pdf structure response and clipping factor variabilities. A screening level consistent with a hclpf capacity that is 2. Je epri report np 6041 sl, a methodology for assessment of.
Here, you can learn about epri s efforts to collect data from a variety of distributed pv systems. The electric power research institute epri leads research, development, and demonstration of technical and operational solutions in electricity generation, delivery, and use. The seismic margin earthquake sme for sma was set to pga 0. Nuclear and facility safety programs workshop fire safety track may 5th, 2015.
The author here shares his vision of nextgeneration models for seismic soilstructure interaction ssi analysis. Nuclear and facility safety programs workshop fire safety. There are many epri reports with chapters or more on lightning and lightning protection that have become publicly available now. Epri np 5223, rev 1, january 1991, generic seismic ruggedness of power plant equipment nuregcr4659, vol 4, june 1991, seismic fragility of nuclear power plant components phase ii a fragility handbook on eighteen components epri np 6041 sl, rev 1, august 1991, a methodology for assessment of nuclear power. Seismic robustness analysis of nuclear power plants. Usnrc sma described in nuregcr4334 and electric power research institute epri sma described in epri np 6041 sl methods. Electric power research institute epri 1994 methodology for developing seismic fragilities. A methodology for assessment of nuclear power plant seismic. Seismic margin, epri report np6041sl, revision 1, palo alto, california, 1991.
Evaluation of flaws in nuclear piping sciencedirect. Safety aspects of nuclear power plants in human induced. For further information about epri, call the epri customer assistance center at 800. The conclusion of this detailed study was that with proper storage, shelf life for elastomer seals could be extended to 32 years. Aerospace b recommended issued 199811 superseding arp5316a. View fred grants profile on linkedin, the worlds largest professional community. The general procedure of both methods consists of mainly three key elements. However, while np7502 is a useful guideline, it cannot be applied to resolve. Margin, epri np6041slr1, revision 1, palo alto, ca. Generic implementation procedure gip for seismic verification of nuclear power plant equipment, rev.
A methodology for assessment of nuclear power plant seismic minis. Eprinp6695 guidelines for nuclear plant response to an earthquake. Norris, k kishida evaluation of flaws in nuclear piping new solutions are needed especially for surface flaws and axial flaws and the interpolation functions for crackopening displacement. This document is available in either paper or pdf format. Please clarify whether, and to what extent, the screening guidance of epri np 6041 sl, table 24 without the 1.
This paper describes the soilstructure interaction ssi effects to the nuclear power plant npp structure with reactor vver1200491 pwr. Electric power research institute, a methodology for assessment of nuclear power plant seismic margin revision 1, np 6041 sl, rev. Dear epri customer, our records indicate that you received epri report np 6041 slr1, a methodology for. Seismic evaluation criteria in epri report np6041 are applied to. Catawba, expedited seismic evaluation process report nrc.
Iuclear power plant seismic margin revision 1, 14 and. This report documents fragility methods so that they are understandable to the welltrained utility structural mechanics engineer. Pdf seismic fragility analyses of a candu 6 reactor. Seismic fragility of structures, systems and components. Department of energy office of environmental safety and quality guidance for commercial grade dedication september 2011. Sma and spra status report of taipower taiwan power company sep. Pwscc initiation testing us nrc res data needs laboratory data to support both the calibration.
Generic capacity information epri np 6041 when shown applicable seismic design criteria assign low median fragility values in some cases surrogates mechanical componentspipingothers identify these sscs for verification of no vulnerabilities in the field during the plant walkdown screening of sscs. In addition, this site provides opendss distribution feeder models and sample data sets at no cost. Others standardsrelated documents continued tsl120070088. Epri is currently leading multiple efforts throughout the u. The approach in epri np5652 is partially endorsed by the nrc in gl8902 and it is anticipated that epri 3002002982 will be endorsed by nrc when completed. Seismic margins assessment of the plutonium processing.
Epris seismic margin methodology enables utility engineers to quantify a nuclear power plants. Kk safetyrelated structures, systems and components performed very well in. Efficient and accurate determination of floor response spectra frs is critical in seismic risk analysis and design. Errata sheet for epri technical report, a methodology for assessment of nuclear power plant seismic margin revision 1, np 6041 slr1. License application documents for levy nuclear plant, units 1 and 2.
With significant challenges facing the electric industry and the world, we are always seeking top talent with handson experience to address issues as they relate to the generation, delivery, use, management and environmental responsibility of global electricity. Epri report tr102260, supplemental guidance for the application of epri report np5652 on the utilization of commercial grade items safety and hazard analysis software and design software software that is used to classify. Eprinp6695 guidelines for nuclear plant response to an. A methodology for assessment of nuclear power plant seismic margin revision i. Electric power research institute, epri, and togethershaping the future of electricity are registered service marks of the electric power research institute, inc. This paper discusses a newly issued guideline, epri np 7218, prepared specifically for acceptance sampling of commercial grade items for safety related use. Pdf electric power research institute epri has recently. This was followed up in may, 1994 by epri np 6608, shelf life of elastomeric components.
To address motor regreasing issues, a motor relubrication practice was developed by the electric power research institute epri in 1992 np7502. Electric power research institute epri 1991 a methodology for assessment of nuclear power plant seismic margin revision 1. Outline of presentation history of sma sma concepts nrc sma methodology additional enhancements broader technical issues 2. Dear epri customer, our records indicate that you received epri report np 6041 slr1, a. After fukushima event, extra weight has given to the works of implementing safety inspection and evaluation which attempt to evaluate the safety margins of npps under beyond design basis conditions as well as to bring forward some improving measures. Paks nuclear power plant npp identified the postfukushima actions for mitigation and management of severe accidents caused by external events that include updating of some hazard assessments, evaluation of margins of existing severe accident management sam facilities, and construction of some new systems and facilities. Structure response and clipping factor variabilities using. The focus and application of epris research and activities span virtually every aspect of the power industry, including. Joint ictpiaea advanced workshop on earthquake engineering. Seismic risk assessment is also important for an insurance portfolio of properties and for lifelines such as transportation, water distribution, and electric transmission systems. Epri is at the center of a quickly evolving energy landscape. Sr project manager seismic walkdowns and reevaluations u. Seismic individual plant examination of external events of us nuclear power plants.
Seismic margin concepts 5 system modeling abbreviated system models. Postearthquake assessment of structures using freefield motions. The user of this guidance document on the use of the ilac process in lieu of a commercial grade. Scaling methods, which allow the generation of frs corresponding to new ground response spectra grs by multiplying existing frs with appropriate scaling factors rather than by performing reanalyses of the structure, are efficient and economical approaches. Reducing motor bearing failures modified lubrication. Epri errata for np 6041, page 643, a methodology for assessment of nuclear power plant seismic margin revision 1. Enterprise integration of distributed energy resources. Epri has created this public website to serve as a resource for researchers in this important area of power system studies. This paper compares the similarities and differences between the challenges on seismic qualification of structures, systems and components in npps situated on two diametrically opposite geographic. Fred grant senior project manager simpson gumpertz. Pdf equipment capacities from earthquake experience data for. Preliminary perspectives gained from individual plant. The tests were performed using threepoints bending specimens 3pb specimens and compact specimens ct specimens, an extensometer fixture surrounding the ct specimens was used for displacement. In the commercial nuclear industry, procurements of replacement parts for operating plants typically involve small quantities purchased in isolated lots.
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