Környezeti mintavételezés III

Environmental Sampling III.

2. site: Savoya Park, Measurement of Environmental Radiation

Venue

Savoya Park, at the final station of the tram number 17, Albertfalva, Budapest XXII. district.

time: 8:10, on the day determined in the schedule

meeting point: Savoya Park main entrance inside, at the benches, this is shown by the end of the blue arrow on the figure below

Background material: Environmental Physics Methods see chapter 2, 3, 6, 7, 10.

Measurements

jobs, timing:

Introduction 8:10 Savoya Park entrance, at the benches

group	8:30 – 9:30	9:30 – 10:30	10:30 – 11:30
A	UZAJ	TESZ	EGAM
B	UZAJ	EGAM	TESZ
C	TESZ	UZAJ	EGAM
D	TESZ	EGAM	UZAJ
E	EGAM	TESZ	UZAJ
F	EGAM	UZAJ	TESZ

supervisors at the measurements: UZAJ – Attila Machon, EGAM– Silvana Beltran, TESZ – Ákos Horváth

Topics

1. UZAJ Traffic noise measurements

question:

What is the effect of traffic and environmental noise on the workers, who work in the parking lot?

group A – uzaj 8:30

a) Walk around the building of the OBI and measure the noise levels at several necessary points!

b) Analyze the noise levels using the minimum, maximum values, from the aspects of the parameters of the possible source terms, shadowing and reflexion of the sound waves.

group B – uzaj 8:30

a) Measure the traffic noise in the intersection B several ways: 5×10 sec, 5×1 minute, 3×3 minutes, 2×10 minutes. Determine advantages and weaknesses of each measurement times. Record the parameters of the traffic as well: what kind of vehicles, how many!

b) Select the optimum for this case! Is this option always the best solution?

group C – uzaj 9:30

a) Measure the spatial dependence of the noise level from the main road, perpendicular to the road, at the point A. The suggested measurement points are at 0, 10, 20, 30, 40, 50 meters. The duration of 1 measurement should also be determined, and decide if it is measured in parts or intact.

b) Make an interpretation of the distance dependence! Compare the noise levels with the standards!

group D – uzaj 10:30

a) Examine the possible noise sources in the parking lot of the Auchan! i) at the entrance, ii) at the escalator, iii) out of the way, iv) at parking cars, v) in the corner...

b) What is the most intensive source? What cause the noise in these cases? Evaluate the noise sources accordimng to their level, creation mechanisms and importance.

group E – uzaj 10:30

a) Determine the time dependence of the noise level at the intersection B, use optimum short intervals!

b) How does the noise depend on red/green light, on the type of the cars?

group F - uzaj 9:30

a) Determine the time dependence of the noise level at the intersection A, use optimum short intervals!

b) How does the noise depend on red/green light, on the type of the cars?

2. EGAM Environmental gamma dose rates and the role of the building materials

question:

What is the effect of the environmental ionizing radiation on the people working 8 hours at the measured sites?

group A – egam 10:30

Measure what is the dose rate spatial dependence from the walls along a corridor! Measure at 1m height, systematically on short lines perpendicular to the wall. Repeat it at several points.

group B – egam 9:30

Measure the gamma dose rates along a polygon in the parking lot of Savoya Park at 1 m height, 3×3 sec times each! One half of the points should be under open air, the other half should be under the building. Compare the open and under building areas, which has higher dose rate? Analyze the sources!

group C – egam 10:30

Measure the vertical dependence of the gamma dose rate inside the building! Measure at a location where there is a stairway or escalator and you can reach several storey at about the same location (basement, ground floor, first floor).

group D - egam 9:30

Choose 15 sampling points in the parking lot. Measure the dose rates at 1 m height and on the ground. At what here is higher gamma dose rates? Describe the potential sources.

group E – egam 8:30

Choose 15 sampling points in front of the entrance on the road in a 100 m wide area. Make measurements at each side 3 times at 1 m heigth, 30 sec and read the value at the end of the 30 sec time interval! Describe the measurement points well individually. What was the highest dose rate? Try to explain what is the origin of these high values!

group F – egam 8:30

Measure the gamma dose rates at 1 m hight along a line from the parking entrance to east at every 5 m. Analyze the data! Descibe what factors of the environment can cause the values above and below the average!

3. TESZ Electric and magnetic field around Power Grid Lines (50 Hz electrosmog)

question:

What is the magnetic field and its effect around the transformer station and the power grid on the people who work nearby them? Explain the results using the right hand side law and the distance dependence of the magnetic field from its source. Compare the results with the limit values. Use the background material: Environmental Physics Methods for help!

group A – tesz 9:30

Measure the magnetic field x,y and z components along a line inside the Savoya Park building. Look for electric power lines around the measured line. Where are their possible location?

group B – tesz 10:30

Investigate the magnetic field x, y and z component on a line that is perpendicular to the power line at the high tower location. The line is that one paralell with Kitérő street.

group C – tesz 8:30

Measure the x,y and z component of the magnetic field along a line that is perpendicular to the power line behind the Möbelix building. Describe the saptial dependence of the components and the absolute value of the magnetic field vector!

group D – tesz 8:30

Measure the x,y and z component of the magnetic field along a line approaching the power line behind the Möbelix building. Describe the saptial dependence of the components and the absolute value of the magnetic field vector!

group E – tesz 9:30

Investigate the magnetic field vertical depenence at the measurement point inside the Savoya Park building. Determine the source of the field based on the data and looking around and considering the visible electic lines!

group F – tesz 10:30

Investigate the magnetic field around the transformer station. Approach it along a line and describe your results. What is the main source of the magnetic field on this line. Why there are some outlying data occures? Calculate the absolute value of the magnetic field vector at every measurement points!