1

Dosimetric Control System Dosimetric Control System for the IBR-2 Reactorfor the IBR-2 Reactor

Joint Institute for Nuclear ResearchFrank Laboratory of Neutron Physics

A.S. KirilovM.L. KorobchenkoS.V. KulikovF.V. LevchanovskiyS.M. MurashkevichT.B. Petukhova

NEC’2011

Мурашкевич С.М. ОИЯИ ЛНФ НЭОКС

Control the radiation situation

Technological premises

Personnel work places

Atmospheric emissions

NEC’2011

Мурашкевич С.М. ОИЯИ ЛНФ НЭОКС

Monitoring of ionizing radiation

Alpha-aerosols

Beta-aerosols

Beta-active gases

Gamma-ray

Neutron

NEC’2011

Мурашкевич С.М. ОИЯИ ЛНФ НЭОКС

Dosimetric Control System

“System 8004-01”

132 detectors

12 shutters

Multichannel

block of counters

FT245 USB FIFO

TCP/

IP

NEC’2011

Remote computer

Control computer

USB-interface

The reactor dosimetric control room

Main control room of the reactor

CAM A C

Мурашкевич С.М. ОИЯИ ЛНФ НЭОКС

Data-transfer CircuitDetectors Control Circuit

Detector Signal Shapers

Hardware: Block of counters

NEC’2011

USB interface

D001

D132

F001

F132

ALTERA FT245R PC

Мурашкевич С.М. ОИЯИ ЛНФ НЭОКС

Software package

Multichannel Block of Counters

d_sdc

Database VARMANs_sdc

SDC

SDC_SERVER

SDC_CLIENT

TCP/IP

US

B

NEC’2011

Hardware

Control computer

Remote computer

Data Procession

User Graphical Interface

Block Driver

User Graphical Interface

Мурашкевич С.М. ОИЯИ ЛНФ НЭОКСNEC’2011

Control computer: Main Window

Мурашкевич С.М. ОИЯИ ЛНФ НЭОКС

Data Processing

NEC’2011

The data processing module periodically stores logs to hard disk in individual files:

• current levels of radiation

• maximal levels of radiation during observation and the time of their appearance

• exceedance of the threshold values: - time of its appearance - threshold exceedance duration - corresponding dose during the threshold exceedance in any channel

• integral values of radiation levels

• mean values of radiation levels during the shift

• beam shutters status log

Мурашкевич С.М. ОИЯИ ЛНФ НЭОКС

Control computer: Main Window

NEC’2011

Мурашкевич С.М. ОИЯИ ЛНФ НЭОКС

Remote computer: graphical interface

NEC’2011

Мурашкевич С.М. ОИЯИ ЛНФ НЭОКС

Conclusion

A new dosimetric control hardware and software complex for the IBR-2 reactor was put into operation in the winter of 2010.

In the summer of 2011 the complex was successfully tested during the trial start-up of the modernized reactor.

NEC’2011

12NEC’2011