Seismic qualification of a switch box

doi:10.2172/10105536

Abstract

This supporting document details the results of a seismic analysis on a switch box assembly. The switch box is mounted to a Unistrut frame and is attached to the concrete floor in the 225B Building with Hilti Kwik bolts. The assembly was found to meet safety class 3 requirement. Although all components analyzed were found to be structurally adequate, some changes are recommended. To comply with SDC 4.2 specification, the Hilti Kwik bolts should be: placed at least 8 1/4 inches from the edge of the concrete floor; should have a minimum spacing of 8 inches from any Kwik bolt; and should be embedded 5 1/2 inches into the concrete. The minimum embedment distance is 2 3/4 inches. Furthermore, when the bolts are installed, rebar within the concrete should not be cut or damaged. Finally, the length of the Hilti Kwik bolt should be sized such that the distance from the top of the bolt to the top of the nut is not less than 2 thread pitches, and not more that 3/4 inch.

Research program for seismic qualification of nuclear plant electrical and mechanical equipment. Task 2. Correlation of methodologies for seismic qualification tests of nuclear plant equipment. Volume 2

Kana, D.D. ; Pomerening, D.J. August 1984

The Research Program for Seismic Qualification of Nuclear Plant Electrical and Mechanical Equipment has spanned a period of three years and resulted in seven technical summary reports, each of which covered in detail the findings of different tasks and subtasks, and have been combined into five NUREG/CR volumes. Volume 2 presents a general method for correlating the severity of one seismic qualification motion of given dynamic characteristics to another motion, possibly of different dynamic characteristics. The method provides a method of measuring relative damage severity of two different motions in terms of a relative damage severity ratio.
Program plan for environmental qualification of mechanical and dynamic (including seismic) qualification of mechanical and electrical equipment program (EDQP)

Weidenhamer, G.H. June 1986

The equipment qualification program described in this plan is intended to provide the technical basis for resolving uncertainties in existing equipment qualification standards. In addition, research results are contributing to the resolution of safety issues GI-23, GI-87, USI-A44, titled, ''Reactor Coolant Pump Seal Failure,'' ''Failure of HPCI Steam Line Without Isolation,'' and ''Station Blackout,'' respectively. Also, research effort is being directed at providing information on the behavior of containment isolation valves under severe accident environments. Although the results of the latter research will not contribute to resolving uncertainties in qualification standards, it has proven cost effective to obtain this informationmore » under this program.« less
Research program for seismic qualification of nuclear plant electrical and mechanical equipment. Task 3. Recommendations for improvement of equipment qualification methodology and criteria. Volume 3

Kana, D.D. ; Pomerening, D.J. August 1984

The Research Program for Seismic Qualification of Nuclear Plant Electrical and Mechanical Equipment has spanned a period of three years and resulted in seven technical summary reports, each of which covered in detail the findings of different tasks and subtasks, and have been combined into five NUREG/CR volumes. Volume 3 presents recommendations for improvement of equipment qualification methodology and procedural clarification/modification. The fifth category identifies issues where adequate information does not exist to allow a recommendation to be made.
Research program for seismic qualification of nuclear plant electrical and mechanical equipment. Part I. Survey of methods for equipment and components. Part II. Evaluation of methodology. Part III. Qualification methodology for line mounted equipment. Volume 1

Kana, D.D. ; Polch, E.Z. ; Pomerening, D.J. ; ... August 1984

The Research Program for Seismic Qualification of Nuclear Plant Electrical and Mechanical Equipment has spanned a period of three years and resulted in seven technical summary reports, each of which covered in detail the findings of different tasks and subtasks, and have been combined into five NUREG/CR volumes. Volume 1 comprises three parts. Part I reviews the methods currently utilized for seismic qualification of nuclear plant equipment with emphasis on qualification by testing. In this review various anomalies that are associated with qualification are identified. Part II provides an in-depth evaluation of the technical issues/anomalies previously identified. Part III providesmore »« less
Instrumentation qualification. Seismic qualification of C-E instrumentation equipment. Part Two

Not Available May 1977

Title: Seismic qualification of a switch box

Abstract

Citation Formats

Research program for seismic qualification of nuclear plant electrical and mechanical equipment. Task 2. Correlation of methodologies for seismic qualification tests of nuclear plant equipment. Volume 2

Program plan for environmental qualification of mechanical and dynamic (including seismic) qualification of mechanical and electrical equipment program (EDQP)

Research program for seismic qualification of nuclear plant electrical and mechanical equipment. Task 3. Recommendations for improvement of equipment qualification methodology and criteria. Volume 3

Research program for seismic qualification of nuclear plant electrical and mechanical equipment. Part I. Survey of methods for equipment and components. Part II. Evaluation of methodology. Part III. Qualification methodology for line mounted equipment. Volume 1

Instrumentation qualification. Seismic qualification of C-E instrumentation equipment. Part Two