adiation safety management practices in 19th preventative maintenance of kori unit 4 and future...

adiation safety management practices

in 19th preventative maintenance

of Kori unit 4 and future plans

adiation safety management practices

in 19th preventative maintenance

of Kori unit 4 and future plans

Table of Contents

1. Improvement practices of Radiation Safety Management - Introduction

1. Improvement practices of Radiation Safety Management - Introduction

2. Improvement practices of Radiation Safety Management - the point

2. Improvement practices of Radiation Safety Management - the point

3. Improvement practices of Radiation Safety Management - conclusion

3. Improvement practices of Radiation Safety Management - conclusion

4. Future plan - automatic decontamination device for contaminated protect wear

4. Future plan - automatic decontamination device for contaminated protect wear

Korea Nuclear Eng,.Korea Nuclear Eng,.

Korea Nuclear Eng,.Korea Nuclear Eng,.

The role of Safety Manager And Dose reduction techniques

Improvement practices of Radiation Safety Management - Introduction

Practices of process control by each water level control

of S/G secondary side

Automatic decontamination device for contaminated

protect wear

Worker Management Protection Control

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RCS water level S/G secondary side water level

Improvement practices of Radiation Safety Management – the point

Reduction radiation dose exposure of workers by process control depend on each water level control of S/G secondary side

Korea Nuclear Eng,.Korea Nuclear Eng,.

Comparison of radiation dose at main point due to water level of S/G secondary side

Improvement practices of Radiation Safety Management – the point

Reduction radiation dose exposure of workers by process control depend on each water level control of S/G secondary side

Korea Nuclear Eng,.Korea Nuclear Eng,.

Perform to the work at inside of S/G secondary side

Man-Way

○ impossible to emplace of shielding

○ hot and humid of workplace → not easy to wear shield garment

Process control for moisture separator work and

Lancing/FOSAR

○ keep the water level more than 70% – space radiation dose rate↓

○ Lancing / FOSAR working with fully drained – space radiation dose

rate ↑

○ process control in order to not perform the working of moisture

separator and Lancing / FOSAR at same time

→ keep the water level more than 70% at working of moisture

separator

Process control by each water level – S/G moisture separator work

Improvement practices of Radiation Safety Management – the point

Reduction radiation dose exposure of workers by process control depend on each water level control of S/G secondary side

Korea Nuclear Eng,.Korea Nuclear Eng,.

Process control for each water level – 126ft

Improvement practices of Radiation Safety Management – the point Reduction radiation dose exposure of workers by process control depend on each water level control of S/G secondary side

Korea Nuclear Eng,.Korea Nuclear Eng,.

complete The

working

complete The

working

Orderly progression other working

Orderly progression other working

Complete Lancing & FOSAR

/ conform fill water

Complete Lancing & FOSAR

/ conform fill water

complete The

working

complete The

working

complete Lancing & FOSAR

/ conform fill water

complete Lancing & FOSAR

/ conform fill water

Process by each water level – 126ft

completeThe

working

completeThe

working

Orderly progression other working(ISI, RCP, snubber, valve)

Orderly progression other working(ISI, RCP, snubber, valve)

Complete Lancing & FOSAR

/ conform fill water

Complete Lancing & FOSAR

/ conform fill water

Lancing & FOSAR working With complete drainage

Lancing & FOSAR working With complete drainage

After drainage S/G Lancing& FOSAR

After drainage S/G Lancing& FOSAR

Orderly progression other working

(ISI, RCP, snubber, valve)

Orderly progression other working

(ISI, RCP, snubber, valve)

After drainageS/G Lancing& FOSAR

After drainageS/G Lancing& FOSAR

Orderly progression other working(ISI, RCP, snubber, valve )

Orderly progression other working(ISI, RCP, snubber, valve )

S/G ‘B’

S/G ‘C’

S/G ‘A’

Improvement practices of Radiation Safety Management – the point Reduction radiation dose exposure of workers by process control depend on each water level control of S/G secondary side

Korea Nuclear Eng,.Korea Nuclear Eng,.

12%

600

target

985

763

993.24

642.76

result target

result

단위 [man-mSv]

단위 [man-mSv]

Improvement practices of Radiation Safety Management – conclusion

Reduction radiation dose exposure of workers by process control depend on each water level control of S/G secondary side

Korea Nuclear Eng,.Korea Nuclear Eng,.

Korea Nuclear Eng,.Korea Nuclear Eng,.

summary issues

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Korea Nuclear Eng,.Korea Nuclear Eng,.

Expected effection

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