CCTV System for Radiation Work Management

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CCTV System for Radiation Work Management

• Yonggwang NPP Unit 5 6

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Contents

• ?. YGN Unit 5 6
• ?. Brief Overview of Radiation Protection
• ?. Description of CCTV system
• ?. Cases for use of CCTV system
• ?. Effects
• ?. IAEA OSART Good Practice
• ?. Conclusion

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?. YGN Unit 5 6
? Key Features

• Type PWR
• Power Level 1,050MWe
• 2 Loops, 2 S/Gs, 4 RCPs
• 177 Fuel Assys, 16 16 tubes
• S/G Vertical U-tube with Economizer
• Condenser Heat Sink Sea water

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?.  Brief Overview of Radiation protection
? Statutory Exposure Dose limit
Category Workers Frequent Visitors General Public
Effective Dose Limit 100mSv per 5 years 12mSv per year 1mSv per year
? Site Exposure Dose limit
Category Workers Frequent Visitors General Public
Effective Dose Limit 16 mSv per year 10 mSv per year 1 mSv per year
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?.  Brief Overview of Radiation protection
contd
? Radiation Work Control
Anticipated Exposure (man-mSv) Counter plan
lt 10 Review and check work order
10 70 Work Order Approval
70 200 ALARA Acting Level Committee Review
gt 200 ALARA Committee review
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?.  Brief Overview of Radiation protection
contd
? Collective Radiation Exposure
Year
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?. Description of CCTV system

• ? Purpose
• Radiation Exposure Reduction
• Efficient Radiation Safety Control in RCA
• Continuous Check-up for important works and
  facilities integrity
• ? Characteristics
• Real-time information by LAN
• Movable Cameras can support important or high
  radiation work anywhere

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?. Description of CCTV system contd
? Composition
Item Item 5 6 RWB
Monitoring System Monitoring System 1 Set 1 Set -
Announcement System Announcement System 1 Set 1 Set -
Camera Fixed 7 Sets 7 Sets 4 Sets
Camera Movable 2 Sets 2 Sets -
Data Cable Data Cable 3.3 Km 3.3 Km 1.1 Km
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?. Description of CCTV system contd
? Network
LAN
LAN
Movable or Fixed
HP Room Console Lack
Office Lobby Monitor
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?. Description of CCTV system contd
? Location (Fixed Camera)
Building Elevation Location Details Main Function
ACB 100 Locker Room Area Prevention of robbery
ACB 100 Entrance to RCA Check-up personnel coming in and out
SAB 100 General Access Area
SAB 77 General Access Area ?
FHB 100 Truck Bay Area Check up entry and exit of equipment and person
FHB 142 Storage Area ?
PAB 144 Personal Airlock Area Controlling entry and exit in high radiation area
RWB 100 Hot Machine Shop Check-up personnel coming in and out
RWB 100 Entrance of RCA Controlling entry and exit in high radiation area
RWB 100 Truck Bay Area Check-up entry and exit of equipment and person
RWB 70 Access Area Check-up personnel coming in and out
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?. Description of CCTV system contd
? Location (Movable Camera)

• Movable Cameras are communicated with main
  control center
• by using connecting jack

Building Elevation Number of jacks Main Function
RCB 100 2 Installation and removal of SG Nozzle dam Installation and removal of SG man-way ECT (Eddy current test)
RCB 125 2 Maintenance of RCP and related works Lancing and FOSAR in secondary side of SG
RCB 142 2 Reactor Maintenance fuel loading and withdrawal Check-up entry and exit of equipment and person
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?. Description of CCTV system contd
? View of Fixed Camera
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?. Description of CCTV system contd
? View of Movable Camera
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?. Description of CCTV system contd
? CCTV system Diagram
HP ROOM
MONITOR
MONITOR
ACB 100 LOCKER AREA ROOM
MONITORING SERVER(DVR)
MATRIX SWITCHER
ACB 100 Entrance of RCA
11SET
SAB 100 GEN ACCESS AREA
SAB 77 GEN ACCESS AREA
KEYBOARD
KEYBOARD
FHB 100 TRUCK BAY AREA
4SET
PAB 144
LINK FACILITY
FHB 142 STORAGE AREA
PAB 144 PERSONAL AIRLOCK AREA
LINK FACILITY
to RWB
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?. Description of CCTV system contd

• ? HP Room Console Rack (Main control center)
• Real time Monitoring all places
• where cameras are located.
• Recording important works
• Announcing
• Auto Recording when any
  movement is detected.

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?. Description of CCTV system contd
? Monitoring in HP Room Console Rack
All locations under surveillance
The main work place
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?. Description of CCTV system contd
? Comparison (use or not)
Work Year Number of workers Working Time (man-hr) Exposure Dose (man-mSv) CCTV use or not
SG Nozzle Dam 2003 61 101 11.02 Not
SG Nozzle Dam 2006 52 62 6.30 Use
ECT 2003 435 1,044 38.3 Not
ECT 2006 290 698 23.41 Use
SG Man-way 2003 83 156 6.23 Not
SG Man-way 2006 81 177 4.33 Use
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?. Cases for use of CCTV system
Case 1

• ? Removal of remaining Thermal Sleeve (T/S)
• 2005.05 Unit 5 third Planned Outage (37 days)

ltRelated event descriptiongt

• During the first outage of unit 5, a metal
  object was discovered in
• the Reactor Bottom Head. (conformed by Remote
  Video Inspection)

• As a result of the specific inspection, three
  metal objects were
• discovered. These objects have been identified
  as missing thermal
• sleeves from the Safety Injection Nozzle.

• A remaining T/S was planned to be removed during
  the third Outage

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?. Cases for use of CCTV system
Material Inconel 690 Size (mm)
304(W)554(H)4.5(T) Weight (kg) 20Kg Dose rate
(removal) 6mSv/hr
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?. Cases for use of CCTV system contd
? Monitoring T/S Work through CCTV System
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?. Cases for use of CCTV system contd
? Result of ALARA Control
Target (mSv) Result (mSv)
Dose 160 73.91 53.8

• Reason of exposure Reduction

Content Reduction Rate()
Work control (Lead shielding and vest) 10
Reduction of the Number of person( Effect of CCTV) 10
Optimization of Working time (Effect of CCTV) 6
Cancellation of some work 28.8
SUM 53.8
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?. Cases for use of CCTV system contd
? Effect of using CCTV System

• Reduction of Exposure 16 man-mSv (10)
• About 15 persons supervised the work through
  CCTV
• during the working period (11days)
• persons x staying time x Radiation level in
  the area
• Optimization of Working Time 9.6 man-mSv (6)
• Reduction of Radioactive Waste 1 Drum
• About 220 pairs of Rubber gloves / paper
  protection Clothes

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?. Cases for use of CCTV system contd
Case 2

• ? Maintenance of leak Valve (SI-V522) in SI
  System
• Date 07. 7.17(unit 6 fourth outage)
• Work Description
• At the time of NOT/NOP, SI- check Valve 522 of
  High Presser
• Safety injection Header leaked
• Piping was isolated throughout Ice plugging and
  Valve was
• Maintained
• CCTV System was used to monitor the maintenance
  work
• and ALARA Control

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?. Cases for use of CCTV system contd
? Result of ALARA Control
Target (mSv) Result (mSv)
Dose 6.69 5.75 14

• Number of workers 16
• Total working time 6 hrs

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?. Effects

• Reduction of the number of person coming in and
  out

• Reduction of exposure dosage

• Reduction of radioactive waste

• Savings in protection supplies

• Real-time checkup in the office

• Radiation safety control in high radiation areas

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?. OSART GOOD PRACTICE
? IAEA OSART Review ? Duration 2007. 4.16
5.3 ? Reviewed items - 7 items besides
management, organization,
administration sections of YGN 56 ? Result
of review in Radiation Protection Section
- 2 good practices out of 10 good practices
(No proposal for improvement)

• CCTV System was evaluated as Good Practice

? the other is RIS (Radiation Information System)
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?. Conclusion

• Radiation safety control is requisites for
  lasting
• nuclear industry

• Our various efforts will help to improve
  radiation
• safety control whether it is large or not

• Actually, CCTV system is small effort but the
  such
• effort will makes a good fruit

Our will and endeavor should be followed
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Thank You!!!
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Maintenance of Leak Valve (SI-V522)
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Maintenance of leak Valve (SI-V522)
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? KHNP(Korea Hydro Nuclear Power) Organization
KHNP Overview
President CEO
Headquarters
QA Office
Auditor
Audit Office
PI Office
Plan Admin Div.
Project Div.
Radwaste Project Div.
Power Gen. Div.
Branches
Nuclear Power Site
Hydro Power
Kori
Yonggwang
Wolsong
Ulchin
Han-gang Hydro Power
Gen. Admin. Office
Nuclear Power Environ. Tech. Inst.
Radwaste Project Site Office
New York Office
Comm. Envir. Off.
Plant 1 (Unit12)
Nuclear Power Education Inst.
Paris Office
Radiation Health Research Inst.
Plant 2 (Unit34)
Plant 3 (Unit56)
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KHNP Overview
contd
? Status of Nuclear Power Plants
In Operation
Under Const/Planed
Total
Site
Unit (MW)
4 (3,137)
2 (2,000), 2 (2,800)/ -
8 (7,937)
Kori
4 (2,779)
2 (2,000)/ -
6 (4,779)
Wolsong
6 (5,900)
-
6 (5,900)
Yonggwang
6 (5,900)
- / 2(2,800)
8 (8,700)
Ulchin
20 (17,716)
8 (9,600)
24 (21,716)
Total
? Seoul
Ulchin 1,2,3,4,5,6 (Shin-Ulchin 1,2)
Wolsong 1,2,3,4 (Shin-Wolsong 1,2)
Yonggwang 1,2,3,4,5,6
Kori 1,2,3,4 (Shin-Kori 1,2,3,4)
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KHNP Overview contd

? Nuclear Power Plants in Operation
20 units (17,716 MW)
Project Unit Reactor Type Capacity (Mwe) NSSS Supplier A/E COD
Yonggwang 1 2 3 4 5 6 PWR PWR PWR PWR PWR PWR 950 950 1,000 1,000 1,000 1,000 W/H W/H DOOSAN DOOSAN DOOSAN DOOSAN Bechtel/KOPEC Bechtel/KOPEC KOPEC KOPEC KOPEC KOPEC Aug. 1986 Jun. 1987 Mar. 1995 Jan. 1996 May 2002 Dec. 2002
Kori 1 2 3 4 PWR PWR PWR PWR 587 650 950 950 W/H W/H W/H W/H Gilbert Gilbert Bechtel/KOPEC Bechtel/KOPEC Apr. 1978 July 1983 Sep. 1985 Apr. 1986
Wolsong 1 2 3 4 PHWR PHWR PHWR PHWR 679 700 700 700 AECL AECL AECL AECL AECL AECL/KOPEC AECL/KOPEC AECL/KOPEC Apr. 1983 Jun. 1997 Jun. 1998 Sep. 1999
Ulchin 1 2 3 4 5 6 PWR PWR PWR PWR PWR PWR 950 950 1,000 1,000 1,000 1,000 Framatome Framatome DOOSAN DOOSAN DOOSAN DOOSAN Framatome Framatome KOPEC KOPEC KOPEC KOPEC Sep.1988 Sep. 1989 Aug. 1998 Dec. 1999 July 2004 Apr. 2005

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KHNP Overview contd
? NPP planned or under Construction
8 units (9,600 MW)
Project Unit Reactor Type Capacity (Mwe) Plant Type COD Remark
Shin- Kori 1 PWR 1,000 OPR1000 Dec. 2010 Under Construction
Shin- Kori 2 PWR 1,000 OPR1000 Dec. 2011 Under Construction
Shin- Kori 3 PWR 1,400 APR1400 Sep. 2013 Under Construction
Shin- Kori 4 PWR 1,400 APR1400 Sep. 2014 Under Construction
Shin- Wolsong 1 PWR 1,000 OPR1000 Oct. 2011 Under Construction
Shin- Wolsong 2 PWR 1,000 OPR1000 Oct. 2012 Under Construction
Shin- Ulchin 1 PWR 1,400 APR1400 Dec. 2014 Planned
Shin- Ulchin 2 PWR 1,400 APR1400 Dec. 2015 Planned
OPR Optimized power Reactor APR Advanced
power Reactor