IEC 60988 : 2.0

Table of Contents

FOREWORD<br>INTRODUCTION<br>1 Scope<br>2 Normative references<br>3 Terms and definitions<br>4 Purpose and description of loose parts detection<br>&nbsp;&nbsp;4.1 General<br>&nbsp;&nbsp;4.2 System definition<br>&nbsp;&nbsp;4.3 System outline<br>5 System requirements<br>&nbsp;&nbsp;5.1 Basic structure and design criteria<br>&nbsp;&nbsp;5.2 Signal acquisition<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.2.1 Selection and installation of the sound sensors<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.2.2 Preamplifiers<br>&nbsp;&nbsp;5.3 Signal processing<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.1 General<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.2 Band-pass filters<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.3 External output signal<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.3.4 Amplifier<br>&nbsp;&nbsp;5.4 Signal storage and signal display<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.4.1 Background noise monitoring<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.4.2 Digitisation and storage<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.4.3 Audio unit<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.4.4 Information display<br>&nbsp;&nbsp;5.5 Signal monitoring<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.5.1 General<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.5.2 Alarm level monitor<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.5.3 Logic element<br>&nbsp;&nbsp;5.6 Calibration<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.6.1 General<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.6.2 Mechanical functional test unit<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5.6.3 Electrical calibration unit<br>6 Initial start-up and operation<br>&nbsp;&nbsp;6.1 System testing before initial start-up of coolant <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;circulating pump<br>&nbsp;&nbsp;6.2 Preliminary surveillance without alarm levels<br>&nbsp;&nbsp;6.3 Adapting the system to the plant requirements<br>7 Surveillance programme<br>&nbsp;&nbsp;7.1 General<br>&nbsp;&nbsp;7.2 Reference recordings<br>&nbsp;&nbsp;7.3 Measurements during operation<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.3.1 Preliminary surveillance<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.3.2 Surveillance<br>&nbsp;&nbsp;7.4 Actions following an alarm<br>&nbsp;&nbsp;7.5 Periodic testing of the system<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.5.1 General<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.5.2 Functional tests<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.5.3 Electrical system test<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7.5.4 Test impacts<br>8 Documentation<br>Annex A (informative) - Description of loose parts detection <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;with typical sound traces<br>Annex B (informative) - Description of detailed functions of <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;each block of the functional block <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;diagram<br>Annex C (informative) - Examples of digital loose parts <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;monitoring systems<br>Annex D (informative) - Comments on evaluation<br>Bibliography

Abstract

Pertains to on-site systems used for continuous monitoring of structure-borne sound measured at the reactor coolant pressure boundary of light water reactors for the purpose of detecting loose parts.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	International Electrotechnical Committee
Pages
ISBN
Committee	TC 45