Pre-commissioning of Automated Radiation Monitoring System of Units 1 and 2 of Beloyarsk NPP

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In 2015-2016 Sosny R&D Company performed pre-commissioning of modified radiation monitoring system for Units 1 and 2 of Beloyarsk NPP in order to ensure radiation safety in decommissioning of Stage 1. Work was preformed after assembling the automated radiation monitoring system of Units 1 and 2 of Beloyarsk NPP in accordance with the existing regulations for nuclear facilities and pre-commissioning program developed by Sosny R&D Company.

Objectives of pre-commisioning of the automated radiation monitoring system of Units 1 and 2 of Beloyarsk NPP:

  • verify the system compliance with the Technical Specifications and Design documents;
  • eliminate revealed non-compliances (if required);
  • prepare modified system for commissioning. 

Pre-commissioning was performed using equipment of high and low levels of the automated radiation monitoring system of Units 1 and 2 of Beloyarsk NPP and included the following activities:

  • individual equipment tests;
  • specialized software adjustment;
  • system dry run.

During pre-commisioning of the automated radiation monitoring system of Units 1 and 2 of Beloyarsk NPP the implementation of the following functions specified in the Technical Specifications were verified:

  • obtaining and presentation of the parameters under control;
  • pre-alarm and alarm settings check;
  • management of sampling line valves; 
  • administration of database and review of archive parameters under control;
  • equipment self-test;
  • information protection from unauthorized access;
  • automatic registration of alarms and events;
  • development, presentation and printing of deliverables;
  • accounting of equipment repair and maintenance;
  • accounting of laboratory analysis data;
  • data backup and restore;
  • transfer and obtaining of data to/from data-processing net of Beloyarsk NPP.

As a result of pre-decommissioning the compliance of the automated radiation monitoring system of Units 1 and 2 of Beloyarsk NPP with the requirements of the Technical Specifications and Design documents was confirmed.  The Commission has made the conclusion that the automated radiation monitoring system  of Units 1 and 2 of Beloyarsk NPP is ready for commissioning. 

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