Study on the monitoring methods for early warning of harmful organisms such as jellyfish and macroalgae near the water intake of the nuclear power plant [an abstract of entire text]

概要

Title

Author(s)

Citation

Issue Date

Doc URL

Study on the monitoring methods for early warning of harmful organisms such as jellyfish and macroalgae near the
water intake of the nuclear power plant [an abstract of entire text]

賈, 川

北海道大学. 博士(水産科学) 甲第15246号

2023-03-23

http://hdl.handle.net/2115/89777

Type

theses (doctoral - abstract of entire text)

Note

この博士論文全文の閲覧方法については、以下のサイトをご参照ください。

Note(URL)

File Information

https://www.lib.hokudai.ac.jp/dissertations/copy-guides/

Chuan_Jia_summary.pdf

Instructions for use

Hokkaido University Collection of Scholarly and Academic Papers : HUSCAP

主論文の要約
博士の専攻分野の名称：博士（水産科学）

氏名：賈川 CHUAN JIA

Study on the monitoring methods for early warning of harmful organisms such as jellyfish and
macroalgae near the water intake of the nuclear power plant
（原子力発電所取水口の周辺海域におけるクラゲ類・海藻類等有害生物の早期警戒のため
のモニタリング手法に関する研究）
Nuclear power plants in coastal facilities use large amounts of seawater for cooling purposes. The presence of
marine organisms in seawater tends to clog the cooling intake system and affects normal water intake. This study
developed the database of harmful marine organisms and summarizes the monitoring methods for early warning of
cooling water intake through extensive investigations and experiments. We outlined the monitoring methods in
onshore, offshore, and aerial scales and suggested appropriate monitoring methods for different marine organisms.
The database in the area near Hongyanhe Nuclear Power Plants (NPP) was compiled by combining the historical
information and ecological conditions of this power plant and its surrounding waters, as well as the monitoring and
salvage situation in 2018-2020. The biological species that might threaten the safety of cooling water intake are
summarized based on their biomass, distribution, ecological characteristics, and potential risks of outbreaks. These
are primarily phytoplankton, such as Phaeocystis globosa and Noctiluca scintillans, that cause red tide; macroalgae,
such as Enteromorpha linza and Ulva pertusa, cause green tide; jellyfish species of zooplankton, such as Aurelia
coerulea and Nemopilema nomurai, that causes white tide. And nekton, such as Acetes chinensis, Oratosquilla
oratoria, Ammodytes personatus, and Engraulis japonicus; macrobenthos, such as Obelia sp., Musculus senhousia.
It was clear that macroalgae and giant jellyfish, in particular, have a significant impact on the safety of cooling water
intake.
We suggested constructing a biological monitoring system within a radius of 30 km with the water intake of
coastal facilities as the center. The monitoring for macroalgae in the intertidal zone where the majority of onshore
water was conducted. Then, the monitoring with netting gear was performed for giant jellyfish, floating seaweeds,
small fish, and shrimp in offshore waters. Aerial monitoring was also conducted based mainly on satellite remote
sensing. It was supplemented by the survey with unmanned aerial vehicles that was done mainly concentrated within
a 5 km radius, focusing on red tide, green tide, white tide, oil spills, and other large-scale abnormalities in watercolor.
From these results, we recommended the optimal monitoring methods for early warning of harmful organisms.
These methods allow us to know accurate information about the growth and distribution of marine organisms that
affect the safety of cooling water systems. It also provides suggestions for improvement of the first protective measure
of the cooling water intake system - trash-blocking nets installation. This study would be a pioneer in the field of
biomonitoring for the safe operation of the nuclear power plant. In addition, the monitoring methods developed in
this study could also be applicable to other coastal facilities, such as thermal power plants that require seawater for
cooling purposes. ...

この論文で使われている画像