1. CCTV System for Radiation Work Management
Good afternoon, I’d like to introduce myself. My Name is lee gui jong
I’m from youngkwang NPP unit 5&6.
I’m pleased to have an apportunity to be acquainted with you.
Radiation safety section is very important in nuclear power plant. As you know well, We are fully concious of the role of Radiation safety and make a lot of efforts to reduce radiation exposure
Today’s presentation is about the one out of our various efforts
Topic is CCTV SYSTEM for radiation work management
Please listen to my presentation
Yonggwang NPP Unit 5 & 6

2. Contents Ⅰ. YGN Unit 5 & 6 Ⅱ. Brief Overview of Radiation Protection
Ⅲ. Description of CCTV system
Ⅳ. Cases for use of CCTV system
Ⅴ. Effects
Ⅵ. IAEA OSART Good Practice
Ⅶ. Conclusion
Contents are as follows
First, I’ll introduce Young kwang NPP unit 5&6
Next I’ll brief overview of radiation protection, description, cases and effects for use of CCTV SYSTEM
Our plant was reviewed by IAEA OSART and CCTV SYSTEM was evaluated as a good practice. I’ll introduce that
Finally, I’ll finish this presentation by saying the conclusion.

3. Ⅰ. YGN Unit 5 & 6 □ Key Features Type : PWR Power Level : 1,050MWe
2 Loops, 2 S/Gs, 4 RCPs
177 Fuel Assy’s, 16 × 16 tubes
S/G : Vertical U-tube with Economizer
Condenser Heat Sink : Sea water
YGN unit 5&6 has key Features as follows
Type is pwr
Generator power is 1,050MW.
Rx cooling system consists of 2 Loops, 2 S/Gs, 4 RCPs, and 177 fuel assemblies.
177 Fuel Assy’s are loaded in a Reactor Vessel.
Each S/G have an Economizer to increase steam quality.
The Condenser Heat Sink is sea water.

4. Ⅱ. 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
Next, I’d like to brief overview of radiation protection
This table is statutory exposure dose limit
for workers, Effective dose limit is 100mSv per 5 years
for frequent visitors, 12mSv per year. for general public, 1mSv per year
But, YGN unit 5&6 control more strictly than statutory limit. We have site exposure dose limit.
for workers, Effective dose limit is 16 mSv per year.
for frequent visitors, 10mSv per year.
Category
Workers
Frequent Visitors
General Public
Effective Dose Limit
16 mSv per year
10 mSv per year
1 mSv per year

5. Anticipated Exposure (man-mSv)
Ⅱ.  Brief Overview of Radiation protection [cont’d]
□ Radiation Work Control
Anticipated Exposure (man-mSv)
Counter plan
< 10
Review and check work order
10 ~ 70
Work Order Approval
70 ~ 200
ALARA Acting Level Committee Review
> 200
ALARA Committee review
And we review and control every radiation work as following standards
If expected exposure is under 10man-mSv, we do not involve
But if it is over 10man-mSv, we should review work order plan and decide whether to approve or not.
If it is High radiation work, we should have ALARA committee review

6. Ⅱ. Brief Overview of Radiation protection [cont’d]
□ Collective Radiation Exposure
Our collective exposure is relatively low.
However, this is not an excellent result for a brand new plant.
We are increasing our efforts to efficiently manage and control radiation work.
Year

7. Ⅲ. 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
We installed CCTV SYSTEM for the purpose of radiation exposure reduction, efficient Radition Safety control in RCA and continuous Check-up works and facilites integrity
Through cctv system we can see and review the situation of work without going to working area And supervisor can direct to workers by announcement or telephone.
So, we are able to minimize the number of workers. and we can reduce radiation exposure and waste
Aditionally, we can control Radition Safety and check up continuously without going there
Main Characteristics are as follows
real time information by lan and movable cameras can support important and high radiation work anywhere

8. Ⅲ. Description of CCTV system [cont’d]
□ Composition
Item
# 5
# 6
RWB
Monitoring System
1 Set -
Announcement System
Camera
Fixed
7 Sets
4 Sets
Movable
2 Sets
2 Sets
Data Cable
3.3 Km
1.1 Km
CCTV system is composed as mentioned in following table
We have one set of Monitering system and announcement ssystem And we have 7set of Fixed cameras and 2 set of movable cameras

9. Ⅲ. Description of CCTV system [cont’d]
□ Network
LAN
LAN
Movable or Fixed
System is networked by lan
Movable and fixed cameras real-time check up the field and We can see the situation in HP Room, office lobby and anywhere pc networted by lan
HP Room
Console Lack
Office
Lobby Monitor

10. Ⅲ. Description of CCTV system [cont’d]
□ Location (Fixed Camera)
Building
Elevation
Location Details
Main Function
ACB
100
Locker Room Area
Prevention of robbery
Entrance to RCA
Check-up personnel coming in and out
SAB
General Access Area “ 77 ″
FHB
Truck Bay Area
Check up entry and exit of equipment and person
142
Storage Area
PAB
144
Personal Airlock Area
Controlling entry and exit in high radiation area
RWB
Hot Machine Shop
Entrance of RCA
Check-up entry and exit of equipment and person 70
Access Area
Fixed cameras are located as following table
Acess Control Builbing has two cameras in locker room and entrance to radiation control area
SAB, FHB, PAB and RWB has cameras and they are real time monitoring all cameras are used to check up personnel coming in and out and check up entry and exit of equipment and work control in high radiation area and so forth.

11. Ⅲ. Description of CCTV system [cont’d]
□ 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)
125
Maintenance of RCP and related works
Lancing and FOSAR in secondary side of SG
142
Reactor Maintenance
fuel loading and withdrawal
Check-up entry and exit of equipment and person
Movable cameras are communicated with main control center by using connecting jack and cable
RCB have 6 connecting jacks and they are able to cover all around in RCB
the jack installed on 100’ are used for Installation and removal of SG nozzle dam, Installation and removal of SG manway and ECT.
The jack installed on 125’ are used for maintenance of RCP and lancing and FOSAR in secondary side of SG.
the jack installed on 142’ are used for reactor maintenance and fuel loading and withdrawal and Check-up entry and exit of equipment and person

12. Ⅲ. Description of CCTV system [cont’d]
□ View of Fixed Camera
We have two types of Fixed cameras This is wall mounted type.
It can move 180 degrees on right and left and move 90 degrees on up and down.
this is dome type. It can move 360 degrees and is located on the ceiling
in the room

13. Ⅲ. Description of CCTV system [cont’d]
□ View of Movable Camera
This is movable cameras and connecting jack and cables
By using jack and cable, We are able to install moveable cameras anywhere in RCB

14. Ⅲ. Description of CCTV system [cont’d]
□ CCTV system Diagram
HP ROOM
MONITOR
MONITOR
ACB 100’
LOCKER AREA ROOM
MATRIX
SWITCHER
MONITORING
SERVER(DVR)
ACB 100’
Entrance of RCA
11SET
SAB 100’
GEN ACCESS AREA
SAB 77’
GEN ACCESS AREA
This slide is CCTV system diagram.
In ACB room There are two dome types in locker room and entrance
In field wall mounted types are installed.
In case that the camera is Far from HP room is connected by link facility
All places are monitored in HP room
KEYBOARD
KEYBOARD
FHB 100’
TRUCK BAY AREA
PAB 144’
4SET
LINK FACILITY
FHB 142’
STORAGE AREA
PAB 144’
PERSONAL AIRLOCK AREA
LINK FACILITY
to RWB

15. Ⅲ. Description of CCTV system [cont’d]
□ 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.
Main control center is the HP Room console rack
In the place we can monitor all places where cameras are lcated and records important works and announce to workers
And cctv system automatically records when any movement isdetected and saves all recordings for six months So, we can replay and review at any time

16. Ⅲ. Description of CCTV system [cont’d]
□ Monitoring in HP Room Console Rack
This screens are multi- view and selected view
The visual quality is good
All locations under surveillance
The main work place

17. Ⅲ. Description of CCTV system [cont’d] Exposure Dose (man-mSv)
□ 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
2006 52 62
6.30
Use
ECT
435
1,044
38.3
290
698
23.41 SG
Man-way 83
156
6.23 81
177
4.33
This slide shows the effects of CCTV system
We installed cctv system from 10 to
So, 2003, we have used cctv system but, 2006 we have used
Generally, After using CCTV system We can reduce the number of workers and working time and exposure

18. Ⅳ. Cases for use of CCTV system
□ Removal of remaining Thermal Sleeve (T/S)
Unit 5 third Planned Outage (37 days)
<Related event description>
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.
Now, I’ll explain to you cases for use of cctv system
May we had a work for removal of remaining thermal sleeve
At that Time we used cctv system for alara control,
Many person watched the situation of the work through cctv
for you a understanding I’ll explain you related event 본문
A remaining T/S was planned to be removed during the third Outage

19. Ⅳ. 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
This pipe is reacter coolant system
This pipe is safety injection nozzle
T/S was installed in this area to transfer and buffer heats against thermal shock
But T/S was missed by constant and strong water flow
Dose rate of T/S was up to 6mSv/hr

20. Ⅳ. Cases for use of CCTV system [cont’d]
□ Monitoring T/S Work through CCTV System
This slide is saved screens monitored by cctv ststem at that time
The work area is high radiation zone. The number of person coming in and out was limited to actual worker and they works in shifts. Next shift worker followed up work flow throgh cctv and they are able to execute their work without time delay
Without cctv, we should have much more exposure and waste

21. Ⅳ. Cases for use of CCTV system [cont’d]
□ 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)
Optimization of Working time (Effect of CCTV) 6
Cancellation of some work
28.8
SUM
53.8
Result of ALARA control was good
Initial target was 160mSv, but the result was 73mSv. 53.8% was reduced
There are several Reasons of exposure reduction
Among the reasons, CCTV system contributed to exposure reduction. It reduced the persons and working time

22. Ⅳ. Cases for use of CCTV system [cont’d]
□ 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
We analyzed the effect of using cctv system
Exposure reduction was 16 man-mSv. It was 10% reduction.
During the working period About 15 persons supervised the work through cctv without going there
So, we roughly estimated the effect by using the following factors
persons, staying time and radiation level in the area
Optimization of Working Time reduced 9.6 man-mSv. It was 6% reduction
And we Reduced 1Drum of Radioactive Waste

23. Ⅳ. Cases for use of CCTV system [cont’d]
□ Maintenance of leak Valve (SI-V522) in SI System
Date : ’ (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
Let me introduce case 2
July during unit 6 fourth outage, we have maintained of leak valve(si-v522) in safety injection system
to give you understanding, I’ll explain to you work description
<본문>

24. Ⅳ. Cases for use of CCTV system [cont’d]
□ Result of ALARA Control
Target (mSv)
Result (mSv) %
Dose
6.69
5.75 14
Number of workers : 16
Total working time : 6 hrs
Result of ALARA control is good
Compare with Target dose, the result is % was reduced

25. Ⅴ. Effects Reduction of the number of person coming in and out
Reduction of exposure dosage
Reduction of radioactive waste
Savings in protection supplies
Now, I’ll summarize effects for use of cctv system
First, we can reduce the number of person coming in and out
we can reduce exposure dosage
we can reduce radioactive waste
we can save protection supplies
we can real time checkup in the office
we can control radiation work to be safe in the office
Real-time checkup in the office
Radiation safety control in high radiation areas

26. Ⅵ. OSART GOOD PRACTICE □ IAEA OSART Review
 Duration : ~ 5.3
 Reviewed items
- 7 items besides management, organization, &
administration sections of YGN 5&6
 Result of review in Radiation Protection Section
- 2 good practices out of 10 good practices
(No proposal for improvement)
From april.16 to may
Our plant was reviewed by IAEA OSART
Our plant were evaluated that The result of review in radiation protection section was very good
We recived two good practices out of 10 good practices
And no recommendation
CCTV SYSTEM was evaluated as a good practice.
CCTV System was evaluated as “Good Practice”
 the other is RIS (Radiation Information System)

27. Ⅵ. Conclusion Our will and endeavor should be followed
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
I’d like to complete by saying conclusion of this presentation
(본문)
Thanks for your attention on my presentation
Our will and endeavor should be followed

28. Thank You!!!
Do you have any question
If not, Thanks again

29. Maintenance of Leak Valve (SI-V522)
This is leak valve and this is valve seat
Valve seats is a litle scratched. At the time of not/nop hot vapor was spreaded through this scratched crevice
Director general instructed to cool down the plant and repair that valve
When the valve was removed from pipe for repair, the pipe was ice-plugged against water missing
This is liquefied nitrogen used for ice plugging

30. Maintenance of leak Valve (SI-V522)
Cctv system automatically records when any movement is detected
This screen is the recorded movie clip at that time let me show you this movie for a while

31. □ KHNP(Korea Hydro & Nuclear Power) Organization
KHNP Overview
□ KHNP(Korea Hydro & Nuclear Power) Organization
Headquarters
President & CEO
QA Office
Auditor
Audit Office
PI Office
Plan & Admin Div.
Power Gen. Div.
Project Div.
Radwaste Project Div.
Branches
Nuclear Power Site
Hydro Power
This is the organization of our company.
Under the President and CEO, there are two Offices, and four divisions at the headquarters.
The audit office belongs to the Auditor independent from the president.
And we have four nuclear sites, ten hydro sites, three institutes and two oversea offices.
The institutes are the Radiation Health Research institute, and the Environmental Technology and Education institute.
Yonggwang
Kori
Wolsong
Ulchin
Han-gang Hydro Power
Gen. Admin. Office
New York Office
Nuclear Power
Environ. Tech. Inst.
Radwaste Project
Site Office
Comm. & Envir. Off.
Plant 1 (Unit1&2)
Paris Office
Radiation Health
Research Inst.
Nuclear Power
Education Inst.
Plant 2 (Unit3&4)
Plant 3 (Unit5&6) 31

32. KHNP Overview □ Status of Nuclear Power Plants [cont’d]
Site
In Operation
Under
Const/Planed
Total
Unit (MW)
Kori
4 (3,137)
2 (2,000),
2 (2,800)/ -
8 (7,937)
Wolsong
4 (2,779)
2 (2,000)/ -
6 (4,779)
Yonggwang
6 (5,900) -
6 (5,900)
Ulchin
6 (5,900) /
2(2,800)
8 (8,700)
KHNP operates 20 units at 4 nuclear power sites, Yonggwang, Kori, Wolsong and Ulchin.
Most of the plants are on the eastern side of the Korean peninsula, only Yonggwang is located on the west coast. Yonggwang and Ulchin sites have 6 units in operation, and Kori and Wolsong have 4 units, respectively.
Currently 8 units are either planned or under construction.
4 units of the OPR 1000 are under construction at the sites of Shin-Kori and Shin-Wolsong. And these units will start commercial operation by 2012.
In addition, 4 units of the APR 1,400 with a capacity of 1,400 MW will be built at Shin-Kori and Shin-Ulchin by 2016.
The Yonggwang Site is located approximately 60 km(37 miles) northwest of Kwangju City, the capital of the Jeonnam Province.  The size of our site is 1,580 acres.
Total
20 (17,716)
8 (9,600)
24 (21,716)
◎ 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) 32

33. KHNP Overview [cont’d]
□ 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
950
1,000
W/H
DOOSAN
Bechtel/KOPEC
KOPEC
Aug. 1986
Jun. 1987
Mar. 1995
Jan. 1996
May 2002
Dec. 2002
Kori
587
650
Gilbert
Apr. 1978
July 1983
Sep. 1985
Apr. 1986
Wolsong
PHWR
679
700
AECL
AECL/KOPEC
Apr. 1983
Jun. 1997
Jun. 1998
Sep. 1999
Ulchin
Framatome
Framatome DOOSAN
Framatome KOPEC
Sep.1988
Sep. 1989
Aug. 1998
Dec. 1999
July 2004
Apr. 2005
We have 16 PWRs and 4 PHWRs.
Kori units 1&2 were constructed by Westinghouse on turn-key base.
Kori units 3&4, Yonggwang units 1&2 and Ulchin units 1&2 were constructed by Westinghouse and Framatome respectively through non turn-key base.
Wolsong unit 1 was constructed by AECL by turn-key base.
The remaining plants, Yonggwang unit 3,4,5&6 and Ulchin unit 3,4,5&6 were constructed by localized technology acquired from Combustion Engineering.
Wolsong unit 2,3&4, were constructed by AECL, a Canadian company, through non turn-key base. 33

34. KHNP Overview [cont’d]
□ NPP planned or under Construction
8 units (9,600 MW)
Project
Unit
Reactor
Type
Capacity
(Mwe)
Plant
COD
Remark
Shin-
Kori #1
PWR
1,000
*OPR1000
Dec. 2010
Under Construction #2
OPR1000
Dec. 2011 #3
1,400
*APR1400
Sep. 2013 #4
APR1400
Sep. 2014
Wolsong
Oct. 2011
Under
Construction
Oct. 2012
Ulchin
Dec. 2014
Planned
Dec. 2015
KHNP is also developing nuclear power plants.  Shin Kori units 1&2 will be operational in 2010 and 2011, Shin Wolsong units 1&2 in 2011 and 2012  , Shin Kori units 3&4 in 2012 and 2013 respectively. 
4 units, Shin-Kori #1,2 and Shin-Wolsong units1,2, will be 1,000 MW class Optimized Power Reactor, and the Shin-Kori units 3,4 will be 1,400 MW class Advanced Power Reactor.
Two more units are also planned to be constructed near the Ulchin site.
* OPR : Optimized power Reactor
* APR : Advanced power Reactor 34