List of Dissertation Abstract（Risk Management and Environmental Sciences Safety Management Course）
NameSupervisor

Title

Abstract
Steel plate is always used in the oil,chemical plant. But the severe operating environment will cause

Xu YAO

Naoya

Research about the miniaturization

corrosion and cracks on the steel plate. For detecting, we need a miniaturized and sensitive detector. In thisKASAIof RFECT probe

paper, writer confirmed the output of the flaw's signal by experiment. And then analyzed the RFECT
phenomenon and proposed a new detecting probe by FEA analysis.
Ferrocene-containing microemulsions have been confirmed to effectively produce the fire extinguishing

TakuyaHideo

IRITANIOHTANI

Effects of oils of ferrocenecontaining microemulsions on theirfire extinguishing performance

performance from ferrocene, but effects of other than ferrocene concentration and surfactant have not beenstudied. In this study, the effects of oils of ferrocene-containing microemulsions on their fire extinguishing
performance was investigated. Fire extinguishing experiment was conducted using pool fire and measured
fire extinguishing time and gas phase temperature. As a result, when n-alkane having 5 to 8 carbon atoms
was used, microemulsion using pentane showed the best fire extinguishing performance.
In this research, a new sensor model that detects low concentration chloride ion with high sensitivity wasproposed. Since corrosion of structures such as bridges and piping is adversely affected by chloride ions, atechnology for detecting chloride ions contained in atmospheric sea salt particles is required. There are

Ayaka

Naoya

Development of a chloride ion

many advantages for optical sensors using optical fibers, whereas with existing sensors there remains aKAWAI

KASAI

sensor using a optic fiber

problem in detecting the low concentration range required for structure monitoring. In this research, a novelsensor using Ag as a sensitive material and an optical fiber as a sensor body was fabricated, succeeded in
detecting 1 ppm chloride ion, and a high robustness sensor system was successfully constructed byexamining the optical measurement method.
Chloroethylenes have been used in large quantities in the past as cleaning solvents at business

Dissolution behavior of
TomokiTakeshichloroethylenes from long-term

KAWARA

KOBAYASHI

contaminated soil and prediction ofexpansion in aquifer

establishments and numerous soil contamination has become apparent. In this study, long-term elution
behavior from loam, andosol and sandy soil to groundwater was measured and analyzed, and elution
promotion effect during heating purification was confirmed. In addition, using the experimental dataobtained by desorption diffusion experiments and the behavior prediction formula of chloroethylenes in theaquifer, it was possible to estimate the extent of contamination by chloroethylene classified by soil in theaquifer.

Hydroxylammonium nitrate (HAN) aqueous solution (aq) has been considered as useful monopropellant

Kenta

AtsumiKUROKIMIYAKE

Condensed phase reaction

replacement for hydrazine because of low toxicity, environmental safety, high density, and low freezing

mechanism analysis of thepoint. However, HAN aq often exhibits extremely high burning velocity, therefore it is difficult to control

decomposition ofburning velocity. Previous study showed that condensed-phase reaction have a great effect on burninghydroxylammonium nitratevelocity. It is important to establish a detailed condensed-phase reaction model of HAN aq. In this paper, toaqueous solution

establish chemical reaction model, we analyzed condensed phase reaction of HAN aq by using simulation
and reaction gas analysis.
In this research, we studied for developing inexpensive AE sensor without temperature influence. Therefore,

Koki

Naoya

SAOTOME

KASAI

Development of optical fiber AE

we propose vibration detection method combining optical fiber and mirror and confirmed that vibration

measurement system withdetection by this method is possible. In addition, we propose a method to improve sensitivity by resonanceresonanceand succeeded in detecting vibration component of high frequency by using the sensor. Furthermore, fromthe experiment using the grating, the possibility of further improving the sensor sensitivity was shown.
Health risks due to inhaling scattered contaminated soil particles are more concerned around soil

Proposal of health risk assessment

contaminated areas, such as heavy metals, which are low in mobility in soil and remain to contamination onYuma

Takeshimethod considering fugitive dust

soil surface. In this research, in order to propose a risk assessment method that can take into consideration

SASAKI

KOBAYASHI

from heavy metals soil

scattering of soil particles affected by changes in soil quality, grain size, soil volumetric water content andcontaminated sites.

persistence of heavy metals in surface soil, we devised calculation formula of scattering speed withreference to research and examined appropriate calculation conditions and parameters.
For the purpose of developing Atmospheric Corrosion Sensor based on Strain Measurement, I conductedexperiments and analyzes with the aim of verifying and eliminating the effect of corrosion products, whichHiroki
SHINOZAKI

Research about the effect ofNaoya KASAI corrosion products on Atmosphericcorrosion monitoring sensor

is an error factor. Experiments were conducted to corrode only one side of a thin metal test piece and it was
confirmed that the corrosion product had a mechanical effect. In order to remove the effect of corrosion
products, I proposed a specimen model with dummy FBG. We evaluated the validity of the model by FEM
analysis and showed that it is possible to remove various error factors such as corrosion products andtemperature.

The flow characteristics of hot air flow attracted by a fire generated in a space having an elongatedrectangular cross section such as a corridor or an underground shopping center in a building are different
Ryunosuke

Yasushi

SUGA

OKA

Prediction of fire-induced thermal
flow in tunnels or long corridors
based on numerical analysis

from ordinary teaching space fire. In particular, it can be said that consideration of the method of defining
the thickness of hot air flow and the influence of the cross sectional shape are insufficient in the past
research. Therefore, in this study, based on numerical experiments, considering the thickness of the hot airflow and the distribution in the hot air flow, considering the representative length applicable to ahorizontally elongated space having a rectangular cross sectional shape, the flow characteristics of the hot
air flow Was examined.
There is a possibility of trouble due to an unexpected reaction caused by mixing of the received liquid waste

Risa SUZUKI

AtsumiMIYAKE

Process hazard analysis on thethe already-existing liquid waste in the tank. The purpose of this study is approach of process hazard

treatment facility of industrial

analysis (PHA) that can evaluate hazard in stages by quantifying the energy. We established limiting values

liquid wasteof temperature change by mixing the energy density and quantifying method of holding energy of received
liquid waste.
In my research, first I conceptualize disaster mitigation activities by grounded theory approach. As theIkkei

Mieko

TANABEKUMASAKI

Conceptualisation of disastermitigation activities andexamination for safety planning

result, I made concept classification which was composed of 4 categories and 15 concepts. Secondly, I
investigated the effects of concept classification for planning of disaster mitigation activities by impact
evaluation. In impact evaluation, I conducted a questionnaire survey of college students. As the result, Icould make sure that usage of concept classification increase number of responses about disaster mitigation
activity and diversify response of it.
HALT attracts attention as a technology to prevent failure of complicated electronic system on the market.

ShotaTadahiroTSUBOISHIBUTANI

Proposal of abnormality detection

However, there is a problem that there is no effective method for analyzing the progress of failure. In thismethod for electronic system using

study, I analyzed the progress of failure of electronic system in HALT by machine learning. As a result ofHALT and machine learning

the analysis, it was found that anomaly of electronic system can be captured by using Gaussian graphicalmodel. This confirmed the superiority of using machine learning in HALT.

Safety management based on risk assessment is used in various situations not only chemical plants. Risk
Masanobu

Mieko

DOIKUMASAKI

Study on new risk assessment
applying probability to runaway
reactionassessment needs probabilities. However, probability of runaway reaction is not considered. Runaway
reaction is a phenomenon in which the reaction rate abnormally increases by which the heat generating
exceeds the cooling in reaction process. Runaway reaction has caused accidents including casualties. The
purpose of this study is applying probability of runaway reaction to risk assessment. This study can develop
risk assessment in chemical plants.

KeiichiMasahiko

NISHIHATA

MATSUMIYA

Development of dye-sensitized

The photovoltaic performance and the physicochemical property related with a dye-sensitized solar cellsolar cell by synergetic effect of(DSSC) using "novel TCB-based ionic liquid (IL)" as an electrolyte were analyzed in this study to enhance

novel TCB-based ionic liquid

durability and conversion efficiency of DSSC.

electrolyte and conductive polymer

electrolyte with a conductive polymer film (PEDOT film) was also evaluated on photovoltaic performance

filmfor DSSC.

In addition, the synergetic effect combined the IL

The trend towards IoT society is accelerating with the backdrop of human resources shortage, and demandfor electronic products will increase more and more development competition will be intensified. In Japan,Tatsuya

Tadahiro

Cost simulation of failure rate

it takes time to evaluate reliability as an issue. Therefore, by introducing a destructive test HALT, analyzing

HAMADASHIBUTANI

improvement by PV system HALT

the development delay avoidance cost, the factory defect rate, the guarantee avoidance cost by improving
the reliability, and the ROI on shortening the reproduction test, should companies introduce HALT We madea cost indicator of.
Firefighting is one of physically and mentally stressful activities in pretty harsh environmental condition.

Consideration of SystemTaishi

YasushiConstruction based on Reflection

MASHITA

OKA

Index of Respiration for Firefighting Management

Physical monitoring of fatigue is useful for getting a better occupational safety management throughimproving the efficiency of firefighting activities, preventing incidents and accidents during firefighting,and reducing human errors due to losing concentration. We tried to construct a prototype system using
wearable terminal and cloud computing method. We verified the availability of the system by applying it totraining assuming large-scale disasters. We examined the rest time from the alert for stopping the activity toreturn to the site.

In the 6 axis random vibration test which is expected as the extraction test of the weak part of the product inNaoki YANO

Tadahiro
SHIBUTANI

Elucidation of influence by test
object fixation position in 6-axis
random vibration test

the development stage, the vibration of the vibration table accurately transmitted to the test object,
especially the electronic product on the board. By comparing the result of the vibration test using the metal
substrate with the analysis result of the past and specifying the vibration mode, when the fixed condition ischanged, the vibration mode of the substrate changes, and the effect of the fragile part extraction test isinfluenced by fixed position.
Ionic liquids (ILs) may have applications as less hazardous solvents. However, their decomposition
products of ILs can include flammable or toxic gases. Because chemical processes using ILs on anNanaAtsumi

YAMAKIMIYAKE

Thermal hazard analysis forindustrial scale are still in the early phase of development, it is important to assess the associated thermal

chemical process using ionichazards. In the present work, the thermal hazards associated with the dissolution of cellulose duringliquids

biomass pretreatment using ILs were examined. Hazards of thermal runaway are minimal during the IL
processing, although ILs decomposition might form combustible gases in a reactor and appropriate systems
for monitoring and removing flammable gases should be in place.
To promote bioremediation, which is a measure against soil contamination of chloroethenes at low

Remediation promoting factors inKasane

Takeshithermal-enhanced biostimulation

YOSHIDAKOBAYASHIof chloroethylenes contaminatedsoilenvironmental impact and low cost, it is important to shorten the purification period and establish aprediction method. In this study, the influence of possible influence factors on the biodegradability ofchloroethenes degrading bacteria was investigated. The influence on the decomposition rate constant in theexamined range is the temperature (30 ° C.)> the soil particle size (500 to 4750 μm)> ORP (-130 to -100mV), and the influence of the concentration of the purifying agent and the coexisting microorganisms wasalso thought.