Tohoku ILC Project Development Center【 Green ILC Study Working Group】
A life cycle assessment of the sustainability of accelerator facilities is needed. To this end, accelerator researchers should first design
accelerator facilities to reduce energy consumption from the design stage. Next, it is necessary to understand the causes of greenhouse gas
emissions during the construction phase of accelerator facilities, and to work with the companies involved in the construction to reduce CO2emissions. The main cause of CO2 emissions during accelerator operation is electricity consumption. For this reason, the power composition ofthe region where the accelerator facility is located should be understood, and efforts should be made to realize operation using green power as
much as possible. Electricity used in accelerators is ultimately cooled by cooling water and discharged from the cooling tower. This thermalenergy is low-grade, but should be recovered and returned to society as much as possible. These efforts will be more effective if they are madein cooperation with local governments and industries in the areas where accelerator facility is located. This poster discusses the roles thatshould be played by HEP researchers together with the communities where ILC candidate site is located.

Why global warming is accelerating•

Before the Industrial Revolution, CO2 emitted by humanactivities and CO2 absorbed and accumulated by the natural
world were in balance.
CO2 is stored in forests, soil, oceans, and atmosphere.
After the Industrial Revolution, that balance has been lost,
and the concentration of CO2 in the atmosphere is increasing.
In addition, human activities, especially agricultural land
expansion and concentration of specific crops, also impair
nature's ability to absorb and store CO2.
In other words, what we need to do today is clear: (1) makeefforts to reduce the excessive emissions of greenhouse gases
and (2) work to restore nature's ability to absorb CO2.

••••

What HEP researchers should do in the first place••

HEP researchers should try to achieve the highest possible
performance per power consumption from the design phaseof their research facilities, and they should also strive tobring their facilities' availability close to 100% by increasing
MTBF (mean time between failure) and shortening MTTR(mean time to repair).
Recover low-grade thermal energy emitted from accelerator
and research facilities and return it to society.

Self-sufficiency by renewable energy
in Iwate Prefecture
706050Target for FY2030
Impact of the Great
East Japan Earthquake

4030201002010 2012 2014 2016 2018 2020 2022 2024 2026 2028 2030
Large-scale factories in Iwate Prefecture, including semiconductor,
automobile factories and etc., are located, and it is expected that
there will eventually be a "competition" for green power. Therefore,
the HEP community needs to cooperate with electric powercompanies to further increase green power generation.

Researchers should cooperate with the community

Researchers should further work with the community•••

To cooperate in increasing the renewable energy rate of local
electricity and to operate research facilities with green
electricity as much as possible.
Understanding and, where possible, cooperating with efforts
by steel, cement, and other GHG emitting companies toreduce their emissions (including CCS/CCUS).
Cooperate with local efforts to restore forests (green carbon)
and oceans (blue carbon), which are inherent to the naturalenvironment.

Iwate Prefecture, where the ILC candidate site islocated, has a very high self-sufficiency rate inrenewable energy in Japan

8.6％
Iwate
Prefecture's
renewableenergygeneration in
FY2023 wasabout 4 TWh.

13.6％

Oshu/Ichinoseki/Kesennuma

CO2 is accumulated in forests, soil, atmosphere, and oceans
Forests absorb a large amount of
CO2 in the current situation. Iwate
Prefecture has a large forest areawith very high CO2 absorption
potential.
Courtesy of Kajima Corporation

30.8％

17.8％

The selfsufficiency rateof renewableenergy is over41% in 2023.

29.2％

Iwate's current self-sufficiency rate for renewable energy is41%, twice the national average, and is aiming for 66% inFY2030.

Each municipality in thevicinity of the ILC candidate
site is located a system toaddress GX, in line withgovernment policy that aims
for carbon neutrality by 2050.
The HEP community must
coordinate with thismovement in the region.

Estimation by Hiroshi Kikuchi,advisor to the Ichinoseki City
Agricultural Land and Forestry
Department: The entire Ichinoseki
forest absorbs 303.53 kilotons ofCO2 per year. The average annual
CO2 absorption per unit area is 4.57
t/year/ha. This amount of CO2absorbed each year is more than
the total amount of CO2 emitted
during the ILC construction period(10 years).

Refer to the poster of Iwate Industrial Promotion Center
about the low-grade waste heat recovery project.

Tohoku ILC Project Development Center https://tipdc.org/en020-0045 Iwate Prefectural University Aiina Campus,Iwate Prefectural Information Exchange Center 7th Floor
1-7-1 Moriokaekinishidori, Morioka City, Iwate Prefecture TEL/FAX 019-625-5030
E-mail:tipdc2020@gmail.com