scope:

Forward

This revision of IEEE Std 344-1987 was developed to expand and clarify guidance for developing programs to seismically qualify Class 1E equipment for nuclear power generating stations. Specific areas of amplification included are based on experience gained since 1987.

The Class 1E equipment to be qualified by procedures or standards based upon this revised recommended practice can be of many forms; therefore, this recommended practice presents the guidelines for many acceptable seismic qualification methods with the intent of permitting the user to make a judicious selection from the options offered. This revised recommended practice attempts to define more fully the procedures by which Class 1E equipment can be seismically qualified. It presents the methods that are known by the working group to be practices that are acceptable to the nuclear power generation industry, its equipment suppliers, and the industrial test and analysis facilities utilized by the industry. The clarification and update of methods in this recommended practice reflect an effort to recommend state-of-the-art techniques at the time of publication.

The methods and definitions presented in this revision are not intended to limit other seismic qualification techniques. Exceptions to these recommended practices may be made at any time where it can be shown that the substituted procedure verifies that the equipment can perform its safety function with justifiable methodology. The basis for a technical justification may be, but is not limited to, partial analysis, tests on similar equipment, experience data, or a combination thereof. Engineering judgment may be used in conjunction with these methods. Exceptions to these guidelines, which are founded on a broad base of actual test, analysis, and earthquake experience, supplemented by engineering judgment, may be used to meet the intent of this standard, provided the methods are justified.

The Foreword of the 1987 revision of this standard noted that experience-based methods for seismic qualification of equipment were under development, and Clause 9 of the 1987 revision contained interim guidance for the use of experience data for this purpose. Since then, development of the experience-based approach has been furthered by the Seismic Qualification Utility Group (SQUG). The SQUG approach was used at many nuclear power plants to resolve USI A-46. It has also been adopted, in part, and used by other governmental and industrial organizations. Accordingly, Clause 10 and relevant parts of Clause 11 of this revision of the standard have been rewritten to incorporate the results of this development. Use of the experience-based approach in this recommended practice is acceptable for use in nuclear plants if it is consistent with the plant's licensing/regulatory design basis.

Issues related to use of median-centered in-structure response spectra for the earthquake experience-based method, operating basis earthquake (OBE) requirements associated with the test experience method, and generation of a test-experience spectrum were considered at length by the working group in the preparation of this document.

Further guidance for qualification of replacement components and devices within an existing, previously qualified larger equipment assembly by the earthquake experience-based method is deferred to the next revision of the standard. Special consideration could be added to determine how to extend earthquake experience data to replacement of components and devices in a previously qualified equipment assembly so that there is sufficient detail and traceability in the areas of equipment performance (physical configuration, operational, and dynamic), installation, excitation, and demonstration of safety function.

Adherence to this recommended practice to obtain equipment seismic qualification alone will not suffice for assurance of public health and safety since it is the integrated performance of structures, fluid systems, instrumentation systems, electrical systems, and man/machine interface systems of a nuclear power generating station that establishes totally safe operating conditions.

This standard was prepared by Subcommittee 2 Working Group 2.5 (Seismic) of the Nuclear Power Engineering Committee of the IEEE Power Engineering Society.

Notice to users

Errata

Errata, if any, for this and all other standards can be accessed at the following URL: http:// standards.ieee.org/reading/ieee/updates/errata/index.html. Users are encouraged to check this URL for errata periodically.

Interpretations

Current interpretations can be accessed at the following URL: http://standards.ieee.org/reading/ieee/interp/ index.html.

Patents

Attention is called to the possibility that implementation of this standard may require use of subject matter covered by patent rights. By publication of this standard, no position is taken with respect to the existence or validity of any patent rights in connection therewith. The IEEE shall not be responsible for identifying patents or patent applications for which a license may be required to implement an IEEE standard or for conducting inquiries into the legal validity or scope of those patents that are brought to its attention.

Participants

At the time this standard was balloted, Working Group SC 2.5 (Seismic) of Subcommittee 2 (Qualification) of the Nuclear Power Engineering Committee had the following membership:

James Parello, ^a Chair

^a Member of the Writing Group

^b Past Chair of the Working Group

Mostafa A. Ahmed^a

Paul D. Baughman^a

Suresh Channarasappa^a

Garry V. Chapman^a

Pei-Ying Chen^a

Walter Djordjevic^a

Robert Enis

Gregory Ferguson

Gregory Hardy

Paul Ibanez

Johnny Jenkins

Robert Kassawara

Mohsin Khan

Bruce M. Lory^a

William LaPay^b

Darren Martin

Donald P. Moore^a

Karur S. Parthasarathy

Daniel J. Pomerening

John M. Richards^a

William Schmidt^a

K. M. Skreiner^b

Donald Smith

Richard G. Starck^a

At the time this standard was balloted, Subcommittee 2 (Qualification) under the Nuclear Power Engineering Committee had the following membership:

Satish K. Aggarwal, Chair

Robert Lofaro, Secretary

At the time this standard was balloted, the Nuclear Power Engineering Committee had the following membership:

John P. Carter, Chair

John J. Disosway, Vice Chair

David A. Horvath, Secretary

Bohumil Bartonicek

Paul D. Baughman

Anup K. Behera

Brij M. Bharteey

Thomas Brewington

Nissen M. Burstein

Craig R. Butcher

Steve Casadevall

Suresh Channarasappa

Garry V. Chapman

Javier Alonso Chicote

Marty Chipkin

Jeff Chivers

Sun Yeong Choi .

James M. Dean

Liviu Nicolae Delcea

Dennis E. Dellinger

Philip DiBenedetto

Quang H. Duong

Frank Drumm

Wells D. Fargo

Artur J. Faya

Robert Francis

James F. Gleason

Patrick Gove

William L. Hadovski

Peter Helander

Thomas R. Hencey III

Jerrell C. Henley

David A. Horvath

Craig S. Irish

Serena A. Jagtiani-Krause

Sushant Kapur

Mohsin Khan

Henry Leung

Bruce M. Lory

Darin R. Martin

P. G. McQuillan

Daniel R. Mikow

Todd Mitton

Asif Mohiuddin

Edward Mohtashemi

Carole Monchy-Leroy

Bill Newell

James Parello

Janez Pavsek

Daniel J. Pomerening

Robert Queenan

John M. Richards

Fredrick Roy

Steve Sandberg

Glen E Schinzel

Roderick Simms

Kjell Spang

Richard G. Starck

Marek Tengler

Marco Van Uffelen

Laszlo Varga

Carl Weber

John Wheless

John White

Toni Wittamore

Richard T. Wood

Toshio Yamamoto

Satish K. Aggarwal

Ijaz Ahmad

George Attarian

Farouk D. Baxter

Brij M. Bharteey

Wesley W. Bowers

Daniel F. Brosnan

Nissen M. Burstein

Robert C. Carruth

Surin K. Dureja

Stephen A. Fleger

Robert Fletcher

Robert B. Fuld

James F. Gleason

Dale Goodney

Britton P. Grim

Paul R. Johnson

Harvey C. Leake

John D. MacDonald

J. Scott Malcolm

Alexander Marion

Michael H. Miller

Gerald L. Nicely

Roger D. Parker

Glen E. Schinzel

Neil P. Smith

James E. Stoner

John Taylor

James E. Thomas

Terence J. Voss

John Waclo

John White

Paul L. Yanosy, Sr.

David J. Zaprazny

The following members of the individual balloting committee voted on this standard. Balloters may have voted for approval, disapproval, or abstention.

When the IEEE-SA Standards Board approved this standard on 8 December 2004, it had the following membership:

Don Wright, Chair

Steve M. Mills, Vice Chair

Judith Gorman, Secretary

*Member Emeritus

Also included are the following nonvoting IEEE-SA Standards Board liaisons:

Satish K. Aggarwal, NRC Representative

Richard DeBlasio, DOE Representative

Alan Cookson, NIST Representative

Don Messina

IEEE Standards Project Editor

Satish K. Aggarwal

Faropuk D. Baxter

Wesley W. Bowers

Thomas Brewington

Daniel F. Brosnan

Nissen M. Burstein

Salvatore Carfagno

John P. Carter

Suresh Channarasappa

Garry V. Chapman

Dr. Guru Dutt Dhingra

Philip DiBenedetto

John J. Disosway

Surin Dureja

Amir El-Sheikh

Jay Forster

James F. Gleason

Lawrence Gradin

Britton P. Grim

Randall Groves

Ajit Gwal

Paul R. Johnson

Harvey C. Leake

John D. MacDonald

G. Michel

William Mindick

James Parello

Roger D. Parker

Fredrick Roy

James Ruggieri

Neil P. Smith

Richard G. Starck

James E. Stoner

James E. Thomas

John Ullo

Terence J. Voss

John White

Paul L. Yanosy, Sr.

Li Zhang

Chuck Adams

Stephen Berger

Mark D. Bowman

Joseph A. Bruder

Bob Davis

Roberto de Marca Boisson

Julian Forster*

Arnold M. Greenspan

Mark S. Halpin

Raymond Hapeman

Richard J. Holleman

Richard H. Hulett

Lowell G. Johnson

Joseph L. Koepfinger*

Hermann Koch

Thomas J. McGean

Daleep C. Mohla

Paul Nikolich

T. W. Olsen

Ronald C. Petersen

Gary S. Robinson

Frank Stone

Malcolm V. Thaden

Doug Topping

Joe D. Watson

Scope

This document describes recommended practices for establishing seismic qualification procedures that will yield quantitative data to demonstrate that the Class 1E equipment can meet its performance requirements during and/or following one safe shutdown earthquake (SSE) event preceded by a number of operating basis earthquake (OBE) events. The test, analysis, or experienced-based evaluation methods described herein may be used to yield data to demonstrate Class 1E equipment performance claims or to evaluate and verify performance of devices and assemblies as part of an overall qualification effort.