2023.06.12

For common users
MALT Tandem Accelerator Research Facility
Usage Guidelines

1. User categorya) MALT members (Tandem Accelerator Research Facility faculty and staff, students in
Matsuzaki Lab, Department of Nuclear Engineering and Management)b) Common users (updated annually)(Co-researchers whose research projects have been adopted, and those who have been
specifically approved by the head of MALT)b-1) members of the University of Tokyo, b-2) members of other universities or institutesc) External users (persons other than those listed above)

2. Space that can be used (entered) by common users(Room)
1F control room
1F break room
3F meeting room
4F chemical treatment room 1, clean room [press, IC]
4F chemical treatment room 2 [draft chamber, ultrasonic machine]
4F laboratory [14C line, ICP-MS](Common space)
Entrance, stairs, corridor, 2F toilet, 3F toilet(Controlled area)
Controlled area (1F target room 1, target room 2, 5F ion source)

1

3. Use of the Tandem Accelerator Research Building
The Tandem Accelerator Research Building is a special building that houses a tandem
electrostatic accelerator that generates a maximum of 5 MV and related equipment. In addition
to the accelerator, there are chemical laboratories and analytical instruments such as mass
spectrometers. There are hidden dangers during usage. In order to ensure the safety of
researchers and staff in the facility, please strictly abide by the following rules when entering
the tandem accelerator building.
●Please use the facility after obtaining the utilization permission.
* A “common user” is a person who is a co-researcher of a MALT common research
project that has been adopted, or a person who is specifically recognized by the
director of the facility.

●

When working in the facility, make sure that the MALT staff are aware of the location andwork content of the common user.
oWhen using the facilities, be sure to contact them in advance and share the usage
plan with the MALT staff.

oWhen entering the tandem building, record the necessary information in the entry
record, and record the exit time when leaving.

oIn principle, the work should be conducted during the MALT staff's office time (9:00
AM-5:00 PM).

o

If you wish to work outside the regular hours, please notify us in advance and obtain
permission from the MALT staff.

●

Please contact the MALT staff if you notice anything abnormal in the facility (noise,smell, unknown person, air leak, water leak, or other abnormalities).

4. Procedure for using the Tandem Accelerator Research Building(Flow of use)
4-1. Advance notification of entry and use of the Tandem Accelerator Research
Building
If common users enter the Tandem Accelerator Research Building and conduct experiments,
etc., please contact us in advance (at least 24 hours before entering) by sending an email tomaltstaff@googlegroups.com, including:2

・User name, affiliation, contact information (if more than one, list all)・Usage time (scheduled entry/exit time)
・Room to use
If you plan to use the chemistry laboratory and have made a reservation in advance, you do
not need to contact us again.

4-2. On the day of your visit
・If you are not feeling well, please refrain from using the facility (please contact us to cancel).

4-3. Records of entry and exit
Be sure to fill in the necessary information in the "entry record book" when entering andleaving the tandem accelerator building.

4-4. In the building
・When entering the tandem accelerator building, please disinfect your hands, gargle, andwash your hands frequently.
・Alcohol-based hand sanitizers are installed at the tandem entrance and corridors.
・Hand sanitizers are placed on the sinks in the 2nd and 3rd-floor toilets.
・Hand sanitizers are also placed in the 1st-floor lounge and 4th-floor laboratory.
・Rest/Eating/Drinking in the Tandem Building: 1F lounge or 3F conference room.
・As a general rule, in the chemical processing room on the 4th floor, you must wear gloves.

5. Radiation worker
Work in the controlled area is limited to common users who have been issued an entrance/exit
control card. Entrance/exit cards will be issued each academic year under the following conditions:a) Be a common user.
b) Applicants must be radiation workers at their own institution and have submitted aworker certificate (and health certificate).
c) Must have taken MALT user education (radiology).

36. Use of in-house network
Common users can use Wi-Fi in MALT. In that case, please let us know the addresses of allconnected devices in advance.

7. Use of chemical laboratories（1） Safety Education
Common users are required to receive safety education in advance when conducting
experiments in the chemical laboratory.
（2） Advance reservation
If you wish to use the 4F chemical treatment room 1, chemical treatment room 2, orlaboratory, please contact maltstaff@googlegroup.com with information about thename of the user, the date and time of use, the contents of the experiment (equipment
to be used), the reagents to be used, the type and quantity of waste liquid, andemergency contact information.
Please check the reservation status of each experimental facility on the MALT official
website (user's page) :http://malt.um.u-tokyo.ac.jp/user-page2/（3） Use of chemicals(a) When using chemicals, please borrow the keys to the chemical reagent cabinet
from the MALT staff, and when you have used the required amount, promptly put
the chemicals back into the chemical reagent cabinet and lock it. Please do notforget to return the keys to the MALT staff.
(b) Please record the usage amount of the corresponding chemicals (reagent ID) inthe "Chemical Usage Record File".
(c) Please pay attention to the whereabouts of the used chemicals, as this information
will be required when disposing of the experimental waste liquid.
(d) If you have any questions, please contact the MALT staff.

4（4） Waste liquid(a) Drain the waste liquid into the designated waste liquid tank.
(b) Record the date, the person who discharged the waste, and the substances andamounts contained in the waste liquid by either of the following methods.
(1) Enter directly on the UTCIMS site(2) Record on the provided recording sheet(3) Report directly to MALT staff
Depending on the contents of the experiment, the method of discharge differs, so
please contact the MALT staff if you have any questions.
（5） Use of liquid nitrogen
Apply in advance for the use of liquid nitrogen (from October 2022 in the Hongo area).
If you would like to use liquid nitrogen in MALT, before 15:00 of the day before thedesired delivery date, please contact maltstaff@googlegroups.com with your name,affiliation, desired date of liquid nitrogen, and container number.
As ever, please put the container in the designated place by yourself, and collect it after
filling.
（6） After the experiment
After the experiment, please restore the laboratory to its original state. Properly clean
the equipment used and dispose of the waste properly. If you have any questions,please contact the MALT staff.

5

A. Safety guidelines (extracted from the safety guidelines of the School ofEngineering, partially modified)
A-1. General precautions for entering and using the Tandem Accelerator
Research Building□ In case of emergencies such as sudden illness or accidents, please let us know youremergency contact information such as your home or laboratory.
□ Please confirm evacuation routes, emergency exits, and evacuation sites in advance.
□ Please check in advance the position of fire extinguishers, fire alarms, fire hydrants,
and emergency showers.
□ Please try not to bring in any items that are not related to the experiment.
□ Check the electrical capacity of the power system to avoid overheating or leakage. Do
not connect a new terminal board or power switch to the terminal board.
□ Smoking is strictly prohibited in the MALT.
□ When going to and from MALT, please obey traffic laws and be careful not to get into
an accident.

A-2. Emergency response
A-2-1. Basics of emergency response

Emergencies (accidents, disasters, etc.) occur in unexpected ways. Therefore, in the event ofan actual emergency situation, first and foremost give top priority to ① ensuring your personalsafety. Next, ② Please contact the MALT staff (regardless of whether you are in the room ornot).
In the event of a catastrophic disaster such as a major earthquake, the safety of people in the
Tandem Accelerator Research Building will be confirmed by looking at the entrance record at
the entrance. If you encounter a disaster while working in the building, but without recording
your entry, your safety will not be confirmed. For this reason, please be sure to fill out theadmission record.
What follows are examples of emergency responses after typical disasters. For your reference.
A-2-2. Fires and Explosions
Initial response○Keep yourself safe.
○Tell people around you in a loud voice.
○Check the surroundings and provide relief if there are injured people.
6

○In the event of an explosion, immediately ensure that the device that caused the explosion
will not become dangerous again. In addition, it is necessary to prevent secondary accidents
caused by explosions and flying debris, such as explosion devices, etc., and the surroundingarea.
Report○Press the fire alarm button (the bell rings and the hydrant pump starts).
○Contact the fire department and MALT staff.
Initial fire extinguishing and evacuation○Use fire extinguishers and fire hydrants to put out the fire as early as possible.
○Evacuate by the least dangerous route possible.
○In the event of an explosion, evacuate immediately if there is a risk of further explosion.
A-2-3. Earthquake
Initial response○Keep yourself safe.
(Earthquake early warnings will be broadcast when shaking with a seismic intensity of 4 ormore is expected.)
Be careful of oxygen deficiency due to leakage of insulating gas (SF6) in theaccelerator tank.
○ Extinguish the fire.
○Securing evacuation routes (lectures/experiments/meetings will be canceled if the seismic
intensity is 5 or higher).
Emergency response○Injured rescue.
○Response to fires, leakage of hazardous substances, and damage to equipment.
○Report the situation to the MALT staff (request support if necessary).
Evacuation/safety confirmation○Moved to the entrance of the Tandem Accelerator Research Building.
○Safety confirmation using the entry record at the entrance.
○Moved to the plaza in front of the main gate of the Asano Campus (in front of the Takeda
Advanced Science Building).
A-2-4. Injuries and Illnesses
Initial response○Inform others and call for support.
○First aid to the extent possible.
○You can also use the Tokyo Fire Department Emergency Consultation Center (#7119, by
mobile phone).
7

Emergency response○Call the emergency number and get to the hospital quickly.
Hongo Health Center: Extension number 22573.
University Hospital: Extension number 34100.
If possible, have someone accompany you to the hospital.
A-2-5. Chemical Substance Leakage
Initial response○Evacuate immediately if hazardous. Stop leaks and prevent spread if possible.
○In the case of diffused toxic gas, spread this information around, and depending on thesituation, evacuate the whole building.
Report○If a large amount of acid is released into the sewer system, contact the sewerage authority
directly.
○Immediately contact the MALT staff.

A-3. Precautions regarding experimentA-3-1. Basics of safety management□ Know the potential hazards of the materials and equipment you use. Also, check the laws andregulations.
□ Conduct a risk assessment for the experimental work.
※ If the potential danger is high, consider using a less dangerous alternative.
□ Propose safety measures to prevent latent dangers from manifesting.
□ Carry out experiments and work after taking sufficient safety measures.
□ If you have any questions or unclear points, even if they are trivial, please consult the staff.

A-3-2. Precautions during experiments(1)

Always try to keep the laboratory clean and tidy.

(2)

At the stage of planning the experiment, clarify the expected disposal method of the waste
liquid.

(3)

Do not leave many chemicals on the laboratory table. Do not leave chemical containers on
the floor.

(4)

Choose protective equipment such as safety glasses according to the conditions of theexperiment.

(5)

Conduct the experiment with a sincere attitude in accordance with the safety handlingstandards and procedures of the laboratory.

(6)

As a general rule, highly dangerous or hazardous work should not be performed on holidays
or late at night. In addition, it should be done by multiple people, not by one person.
8(7)In case of an accident, know in advance the location of the emergency exit, the location of
the fire extinguisher, its type, and how to use it.

(8)

Unmanned operation of the equipment should be avoided as much as possible. For
unmanned operation, provide an appropriate safety device to stop the equipment safely inthe event of an emergency, and clearly indicate an emergency contact.

(9)

When bringing new experimental equipment to MALT, notify the staff.

(10) University laboratories tend to be considered extraterritorial, but in reality, they are subject
to safety and hygiene regulations, just like company laboratories.
A-3-3. Use of hazardous substances
Many of the chemicals and high-pressure gases used in chemical experiments are subject to legal
regulations regarding their handling and storage. In addition, sufficient safety measures are
required when danger is predicted even if not stipulated by laws and regulations.
(1)

Hazardous substances should be transported and handled under the supervision of a person
who has sufficient knowledge of the chemicals.

(2)

Before using hazardous substances, we must think of ways to protect against disasters andmake thorough preparations. If there is a risk of fire or explosion, use a fire extinguisher anda protective plate, and if there is a risk of poisoning, use an exhaust system, gas masks, etc.

(3)

When using hazardous substances, be careful not to stray, leak, or lose them. Use a solid
container with a lid or stopper that will not spill, leak, seep, or spread the hazardous reagent.

(4)

Use a local exhaust ventilation system (draft) when handling substances that generate toxic
vapors or dust.

(5)

There is a danger of ignition in laboratories using volatile solvents. Do not use open-fireheaters.

(6)

Confirm the location of fire extinguishers and fire alarms. In particular, if there is a risk ofignition, prepare it nearby in advance.

(7)

When you leave the room, be sure to turn off the main gas valve.

(8)

If you are conducting an experiment that is expected to be dangerous, inform those aroundyou in advance and prepare countermeasures.

(9)

When using hazardous substances, use the smallest amount possible.

(10) Hazardous materials must not be disposed of with general waste (domestic waste). Follow
the disposal procedures established for the specified material type.
A-3-4. Use of chemicals(1) When using chemicals, borrow the key to the storage cabinet from the MALT staff eachtime, and after using the necessary amount, promptly return it to the storage cabinet
and lock it. Do not forget to return the key to the storage cabinet to the MALT staff.
9(2)When subdividing chemicals, the details of the contents of subdivided bottles, etc., should
be indicated on labels, etc., and they should be quickly disposed of when no longer needed.

(3)

Follow established procedures when disposing of chemicals.

(4)

When chemicals are used, each chemical (reagent ID is assigned) is entered in the"Chemical use record file".

A-3-5. Use of high-pressure gas and cryogen(1)High-pressure gas should be handled by a person who has sufficient knowledge or under
the guidance of that person.

(2)

If cryogens (liquid nitrogen, liquid helium, etc.) are supplied from the Cryogenic Center, youmust attend the "Cryogenic Center Safety Seminar".

(3)

The handling of various gases must comply with the University of Tokyo High-Pressure Gas
Voluntary Control Standards and implement safety measures according to the danger.

(4)

The high-pressure gas cylinder should be fixed to strong support at two points, andmeasures should be taken to prevent it from tipping over.

(5)

When handling high-pressure gas, be careful not to explode. Sudden valve operation ofhigh-pressure gas cylinders and equipment may lead to accidents.

(6)

Remove used and unused cylinders immediately.

A-3-6. Working with hazardous equipment and safety(1)High temperature, high pressure, high voltage, high speed, and heavy equipment are
dangerous and must be handled with sufficient protective measures and careful handling.

(2)

Be careful when handling equipment that you have never used before, and if possible, checkeach part. In addition, before use, receive guidance from staff and experts.

(3)

Equipment that requires skill in handling should be handled after mastering the basic
operation, and careless use may cause a serious accident.

(4)

The user himself/herself restores the used device to the original state before use, and if
there is any defect, failure, or damage, repair it or contact the staff and ask for repair.

(5)

Receive training in advance so that you can properly use protective equipment whennecessary.

(6)

Sufficient attention must be paid to disinfection and clean storage of protective equipment
after use.

(7)

Before use, check that there are no cracks in the glassware.

A-3-7. Handling of accelerators (radiation generators)
Accelerators must be used in a manner stipulated by law as radiation generators. The regulations
stipulated in the 「放射性同位元素等による放射線障害の防⽌に関する法律」, 「東京⼤学タンデ

10

ム加速器研究施設放射線障害予防規程」 must be followed. In addition, to operate the accelerator
and other operations, it is necessary to obtain an "operating qualification" stipulated by MALT.

A-4. Waste disposal
A-4-1. Domestic waste (general waste)(1)

Dispose of domestic waste according to the separation rules specified by the Environmental
Safety Center.
(burnable garbage, non-burnable garbage, plastics, PET bottles, drink cans, glass bottles)(2)

Waste paper, cardboard boxes, and magazines should be disposed of in the recycling box
in the corridor or at the designated waste paper collection point for each building.

(3)

Promptly respond to requests for improvements in disposal and sorting methods.

A-4-2. laboratory waste(1)

Regarding chemical substances, even if they are not regulated by law, substancesconsidered to be harmful must be treated and rendered harmless before being discharged.

(2)

The chemicals used in the experiment and the cleaning solution up to the third time should
be discharged as experiment waste.

(3)

Injection needles, syringes, dirty rubber gloves, sharp knives, etc. that are not contaminatedwith hazardous substances should be disposed of in a designated plastic container as
infectious waste, regardless of whether they are infectious or not. However, if there isadhesion of mercury, it should be discharged as mercury-based waste, and if there isadhesion of other hazardous substances, it should be discharged as Class L.

(4)

Washed and sterilized non-infectious rubber gloves, tips, pipettes, tubes, Petri dishes withno deposits, etc. should be discarded in a dedicated cart as “Other experimental plastics”.

(5)Batteries, small capacitors, etc. used in the experiment should be collected by the supplierin principle. If it is difficult to retrieve the item, such as when the supplier is unknown, pleasecontact the MALT staff.

(6)

Be sure to bring back the measured cathode and samples.

(7)

Never generate unknown reagents or unknown waste.

11