Regulative aspects and decisions at licensing contemporary I

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Regulative aspects and decisions at licensing
contemporary I C changes of NPP with WWER
reactors

V. KRASTANOV, BULGARIA www.bnsa.bas.bg
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Introduction

• 1. IC systems
• 2. Before 2000
• 3. 2001 - 2008

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Topics of Discussion
1. PM modernization program 2. Safety and
Safety Related IC Systems A , B, C IEC
61226 3. Main Objective - RPS - UKTS, ASUT,
CIS - Other
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RPS
Reactor Protection System - 2 LoP -
3 channels in 1 LoP - analog Russian system -
Vendor CNIIPIATOM - LTD - 30 years period
operation - 5 unit 2006 - 6 unit -- 2005
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• UKTS, ASUT, CIS
• - Digital system
• - Safety related System B and C
• - Westinghouse platform
• - OVATION - controller
• - more 70 years period operation
• - double redundancy
• - 3 channels
• - 5 unit 2006 / only UKTS/
• - 6 unit 2005 / only UKTS/
• 5 and 6 unit has ASUT and CIS.

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• Generally, the main designation and functions
  of Primary YKTC Ovation are as follows
• Accomplishment of the control logics of the
  protections and the interlocks of the controlled
  from Primary YKTC
•   Manual control of the primary equipment
  through Primary YKTC
•   Control of the control valves via Primary YKTC
  system regulators

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• Generation of output commands to the executing
  mechanisms through the modules of the Primary
  YKTC Ovation
• Hardware diagnostic of the system (network
  equipment, controllers, I/O modules, quality of
  the input signals, power supply modules, power
  supply, etc.) alarms generation if discrepancy
  appears
• Functional diagnostic and system SW diagnostic
  (MCR switch condition control, condition of the
  controlled components, regulators condition,
  simulation ADP and BFK blocked) alarms
  generation if discrepancy appears
• Processing of the input information (discrete and
  analog) including filtering, normalization and
  selection of mean value for the analog inputs
• Information transfer to CIS- Ovation.

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• Support and self-check of the software and the
  hardware of YKTC-OVATION, including watching for
  appearance of differences between the software
  loaded in the operating and the standby
  controller and the software stored in the
  software server, as well as appearance of
  differences between the data base, loaded in the
  controllers and the data base stored in the
  software server
• Communications with other control systems, such
  as Reactor protection and Emergency protection
  (Reactor Acceleration Down System - RADS), ATCS,
  Secondary YKTC, I, II and III category YKTC
  Safety System

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• UKTS - Functions
• Primary circuit signalization
• Signalization of the Reactor control and
  protection system
• Primary circuit Oil system
• Concentrated boric acid solution system Primary
  circuit
• Maintenance of the water chemistry in primary
  circuit
• System borated water primary circuit on
• System for bypass purification of Primary circuit
  
• System for purification of Primary circuit and
  controlled drainage system
• Cooling of the spent fuel pool

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• Primary feed and bleed system (PFBS)
• Air purification system in the restricted area
• Control rods cooling system
• Clean condensate system
• Emergency core cooling, residual heat removal,
  Emergency high and low pressure baric acid
  injection system
• Hydrogen burning system
• Reactor Building Sampling System
• Emergency feed water system
• Controlled drainages and leakages primary circuit
  
• Primary circuit special drainages
• Fire protection system and fire alarm system

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• Ventilation system in the Main Control Room MCR
  and in the Auxiliary control room (ACR)
• Cooling of the air in the compartments of the
  water supply systems
• Steam Generator Blow down System blow down water
• Main circulation pumps MCP 1, 2, 3, 4
• Lubricating Oil System of the MCP
• Pressurizes System
• Passive Safety Function System of Emergency Core
  Cooling System (hydro-accumulators)

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OTHER
- FLUES System for Quick Detection and
Localization of Leakage from the Reactor Upper
Bloc and the Primary side Siemens , signal to
CIS. - FAMOS System On-Line Monitoring of
Component Fatigue AREVA NP , signal to CIS.

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OTHER II part

• - KUS 95 Ensure Detection of Loose Parts
  System- Siemens, signal to CIS.
• - Hydrogen Detection and Recombination System
  with Siemens help, signal to CIS.
• - RMS Radiation Monitoring System
• - 6 kV - breakers, SVRK Hindokush System of
  Measurement the Neutron Flux, Emergency DG.
• - Automated Device for Cold Overpressure
  Protection Siemens, Teleperm controller.

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ASUTP NPP Kozloduy

• R P S
• UKTS CPS
  ASUT
• FLUES, KUS-95, RMS
• HDRS, FAMOS, COP
  SVRK
• bleu Westinghouse
• red - Siemens
• yellow - Russian

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Thank you for attention !!!