The 7th International Workshop on Accelerator Operations

HVAC Concept Design forProton Target Room Operation
2010. 4. 15

Gye Po Jeon

Proton Engineering Frontier ProjectContents
Ⅰ. Background- GA revision- Shielding design
Ⅱ. HVAC design- Target room operation scenario & access mode
- HVAC ddesigniⅢ. Conclusion & Future works

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Ⅰ BackgroundⅠ.

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Background
1) The IAC recommendation(2007)- Redesign
g the beamlines in which the overall beamline was bent by
y 180 degree
gand has tons of shielding material around it.
- There was strong concerns on the shielding issues that the movable concrete
blocks have some cracks between themthem. In addition
addition, there was a recommendation
to ensure the evacuation pass in case of emergency.

2) PEFP design modification(2007modification(2007-2009)- Reflecting all the issues and recommendations, the PEFP has redesigned thebbeamlineli andd it
its ttargett chambers.
h b: All the beamline is in principle 90 degree bending and the removable shielding
blocks are replaced
pbyy the ppermanent concrete shielding.
g- GA Revision- Shielding analysis & design modification- HVAC system design change4Background1) GA (General Arrangement) : Rev. 0(2007)
Accelerator assembly area
Accelerator tunnel

Beam experimental hall

Accelerator control area

High Radiation Area : DL>12.5 uSv /hr
Radiation Worker Area : 0
0.25<DL≤12.525<DL≤12 5 uSv /hr
Public Area : DL≤0.25uSv/hr

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Background2) GA (General Arrangement) : Rev. 3(2009)

Accelerator assemblyarea

Acceleratortunnel

Beam experimental hall
Accelerator control
area

facilities

Size(m2)

Rate ofchange

Rev. 0Rev. 3

A/T &klystrongallery

9,899

8,090

-18%

Acc.
assembly
area895848-5%

Acc.
ControlArea

2,322

1,877-19%

Beamexperiment
al hall

5,005

3,610-28%

High Radiation Area : DL>12.5 uSv /hr
Radiation Worker Area : 0.25<DL≤12.5 uSv /hr
Public Area : DL≤0.25uSv/hr

6Background3) 100 MeV Target Room Shielding Design
Target
Room

TR101

TR102

TR103

TR104

TR105

Additional
ShieldMaterial

Wall Thickness [cm]Iron

OutsideConcrete

Total

CalculatedDose Rate[uSv/hr]

5090

60

200

8.096

12.50

Roof50110

110

270

0.229

0.25

HotCell50

9060200

8.327

12.50

Wall
direction

InsideConcreteForward

Design Limit[uSv/hr]Forward

1050

90

60

200

8.367

12.50

Roof-5040

1802700.245

0.25

Side-

50

45

105

200

7.434

12.50

Forward

50

50

90

60

200

8.837

12.50

Roof-

50

120

100

2700.181

0.25

Side

30

50

90

60

200

11.75

12.50

Forward

1050

90

60

200

8.578

12.50

Roof

50

45

175

270

0.192

0.25

Side

50

20230300

0.194

0.25

Roof-

50

90

130

270

0.205

0.25

Side above
ground

-

50

20230

300

0.173

0.25

Side below
ground---70

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Ⅱ HVAC designⅡ.

8Target room operation Scenario & Access Mode1) Target room operation Scenario
According to beam current, target materials, beam irradiation, beam time and operation
scenario each target room has its own operation and access mode
scenario,- 20MeV and 100MeV beam utilities are not allowed to operate simultaneously.

: Exclusive operation mode

100MeV

20MeV

9Target room operation Scenario & Access Mode2) In 20MeV target room operation◆ Exclusive operation- TR 21 and TR 25 can not operate at the same time.
- Group 1(TR101), Group2(TR105) andGroup3(TR102 TR103 and TR104) are alsoGroup3(TR102,operated exclusively to each other groups.
◆ Accessibility- After beam shut down, workers can be to access toevery 20MeV target rooms at once.

Group 2

Group 1Group 3

10Target room operation Scenario & Access Mode3) In 100MeV target room operation◆ Exclusive operation- TR 101 and TR 105 can’t operate at thesame time.
- When TR 101 or TR 105 is in operation, TR102 TR103 and TR 104 are not able to102,operate simultaneously.
◆ Accessibility- After beam shut down, people are allowed
to access to TR102, TR103 and TR104.
- one of the 100MeV beams being inoperation TR101
operation,TR101, TR105 and 100MeV
beamline enclosure can not be access toanyone.

Group 2Group 1Group 311

The condition of accelerator bldg. for HVAC system

Bldg.

Temperature(oC)

RelativeHumidity(%)
Min.

Remarks

MinMaxMax

Accelerator Tunnel

25

27

≤55

Recirculation,
Slightly negative pressure

Klystron gallery

22

27

≤55

RecirculationA
Accelerator
l t assemblyblarea : equipment
room

1040

0100

Accelerator assemblyarea : office
ffi

20

27

30

80

BTL(20, 100MeV)

25

27

Target room(TR21-25,TR101-105)

25

27

Lab corridor andLab,target preparation
rooms

1030Accelerator bldg.

Beam application
bldg.

≤55

≤55

Recirculation,
Slightly negative pressure

Recirculation,
Slightly negative pressure

55

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HVAC design configuration – Target Area
Target room
Supply fan

Target area supply AHU

Target Rooms

Target room
exhaust fan

Target area exhaust ACU

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HVAC design configuration – Accelerator building

A/T exhaust ACU

From & To
RMS

A/T supply AHU

Exhaust air
mixing box

From Targetroom

A/T return fan

Klystron exhaust ACU

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HVAC system operation1) System normal operation scenario- HVAC installed in target rooms is operated only in use- the air released from this area should not be exhausted to outside until it is diluted to meetthe requirements of Discharge Control standard.
- The control valves installed in supply and exhaust duct of target rooms should be linked with
supply and recirculation fan of it.
- 3-way valves controlling the flow of the cooling coil for the supply AHU should be controlledcontinuously by temperature monitoring controller to keep the design temperature.

2) SSystemt
iin andd outt off operationti scenarioi- Supply fan and recirculation fan for the target rooms in use should operate.
- Operators should check as follows before fans operate◆ targettt room ddoor should
h ld bbe closed.
ld◆ Check the operators be or not be in the target rooms◆ Open the control valve installed in supply and exhaust duct.
- Supply fan should be operated only if target room control valve opened and recirculation fanoperated and be able to be in and out of operation manually.
- Recirculation fans and exhaust fans can be in and out of operation manually.

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HVAC system operation3) HVAC system Operation procedure of target room
- In Accelerator operation◆ check the target room door in use closed◆ Open the control valve of the target room in use◆ OperateOt ththe supplyl ffan off th
the ttargett room iin use◆ Transfer the signal to the utility control room
- Out of accelerator operation◆ stop the supply fan of the target room in use◆ stop the recirculation fan of the target room in use◆ close the control valve of the target room in use◆ Transfer the signal to the utility control room16

HVAC system specifications
1) Target room HVAC system component specifications
Components

Supply AHU(Air Handling Unit)

Supplypp y Fan

Recirculation fan

Exhaust ACU(Ai Cleaning(AirCli Unit)
U it)linked duct and duct
accessaries

amountCapacity

Detail components andreamarks- Prefilter, Electrical heater,
Cooling coil, Electrical steam
Humidifier fan(100% X 2) and
Humidifier,
so on

1ea

9ea

1,444/1,019/1,019/1,359/510/
1 104/765/765/1 104 m3/hr
1,104/765/765/1,104/h- For TR101& 105 : 1ea- For TR102~104 : 3ea- For TR21~25 : 5ea

9ea

1,699/1,104/1,104/1,444/595/
1 189/850/850/1 189 m3/hr
1,189/850/850/1,189- For TR101& 105 : 1ea- For TR102~104 : 3ea- For TR21~25 : 5ea

1ea- Prefilter, HEPA (HighEfficiency Particulate air filter),centrifugal fan(100% X 2) andso on- Dual Control valve, duct andduct accessaries

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Ⅲ Conclusion & Future works
Ⅲ.

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Conclusion- HVAC system designed to keep dose rate below the ALARA(As Low As Reasonably
achievable) objective
objective.
- According to accelerator operation mode and access conditions based onradiation analysis and shielding design, we made the HVAC system configuration oftarget rooms in the proton accelerator research center.
- Exclusive operation : 20MeV and 100 MeV beam utility are not operated together
and Group 1(TR101)
1(TR101), Group2(TR105) and Group3(TR102
Group3(TR102, TR103 and TR104) arealso operated exclusively to each other groups.
- Access mode : After beam shut down, people are allowed to access to TR102,
TR103 andd TR104
TR104. andd one off ththe 100M
100MeVVbbeams bbeingiiin operation,ti
TR101
TR101,
TR105 and 100MeV beamline enclosure can not be access to anyone.
- HVAC system
yfacilities specification
pand configuration
gis decided.
- HVAC system operation scenarios and procedure of target room is completed19

Future Works
1) PSIS system design
The Personnel Safety & Interlock System (PSIS) in Proton Accelerator Research Center ofPEFP controls access to the restricted areas of the research center in order to gguarantee
the safety and protect the lives of personnel from radiation hazards, abnormal operation,and unexpected accidents.
pin three different access modes (free access mode, controlled access
PSIS is operatedmode, and no access mode) in accordance with the degree of danger and alert system▪ Free access mode: PSIS permits free access to theinterlocked area. This mode of access is applied onlyin special situations requiring all access doors
operated by PSIS to be opened such as the initialinstallation of the accelerator equipments and trial run(in cases which beam is not extracted).
▪ Controlled
C t ll d access mode:d theth opening/closing
i / l ioff ththeaccess doors operated by PSIS is displayed andsupervised on the PSI display in the main control room
through the surveillance system. This mode allows only
the personnel with prior access permission to enterand leave through their designated access door.
▪ No access mode: This mode prohibits access to thehigh radiation areas such as the accelerator tunnel,
beamline compartments (20MeV, 100MeV), and eachof the target rooms.

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Future Works2) Access Control- In order to control access to the radiation
controlled area, the access control system isoperatedt d iin accordancedwith
ith ththe pre-establishedt bli h dentrance sequence.
- to enter the radiation controlled area, theradiation worker must pass through the accessdoors. Many instruments are installed at theaccess door to prove authority of the personnel.
- The Alarm Pocket Dosimeter (APD) system, inli klinkagewithith th
the ID cardd reader,dreadsd th
the ID card
dand connects to PSIS when APD is extracted/inserted so that the identity of the user thatextracted/inserted AP
APD and the number of theworkers entered can be confirmed on the PSI
display at the main control room. In addition, theKey Bank System, provided only to the operating
personnell withith priori permission
i itto entert ththe hihighhradiation area, is a system that connects with PSISin order to survey the number of access to thehighg radiation area and to p
provide conditions forthe opening and closing of the access door to thearea.
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Future Works- To gain access to the high radiation areas such as theaccelerator tunnel, beamline compartments (20 Mev, 100Mev), and target rooms, the radiation workers must passthrough the shielding door which is equipped withnumerous access control devices.
- The Key Bank System reads the ID card in connection withthe ID card reader
reader, and when a key is inserted/extracted
inserted/extracted,
the system is linked to PSIS so that the identity of the userthat inserted/extracted the key and the number of accesscan be confirmed on the PSI display at the main control
room. This system is a part of the open/close condition of
the access door.
- The conditions for opening the access doors
A the accelerator must be off
A.
off, the radiation level must belower than the set point, a key must be inserted that
corresponds to a personnel with prior accesspermission, and the open button must be pressed.
B. The access door remains open as long as the key isinserted. The access door closes when a key that
corresponds to a personnel with prior accesspermission is extracted and the Close button pushed
pushed.

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Thank you !!

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