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Dose Assessment for Population around New NPP in Belarus
Dose Assessment for Population around New NPP in Belarus
Where is Belarus situated
Where is Belarus situated
Facts about Belarus
Facts about Belarus
The Competence of State Organizations in the Area of Nuclear and
The Competence of State Organizations in the Area of Nuclear and
NPP in Belarus
NPP in Belarus
NPP in Belarus
NPP in Belarus
Regulatory limit values
Regulatory limit values
Regulatory limit values
Regulatory limit values
The Concept of Critical Group
The Concept of Critical Group
The Concept of the Representative Person
The Concept of the Representative Person
The Concept of the Representative Person
The Concept of the Representative Person
Dose assessment process
Dose assessment process
Total Effective Dose
Total Effective Dose
Effective Dose from Ingestion
Effective Dose from Ingestion
Effective Dose from Ingestion
Effective Dose from Ingestion
Effective Dose from Ingestion
Effective Dose from Ingestion
Effective Dose from Inhalation
Effective Dose from Inhalation
Effective Dose from Inhalation
Effective Dose from Inhalation
Doses from External Radiation
Doses from External Radiation
Doses from External Radiation
Doses from External Radiation
Summary
Summary
Thank You for Your Attention
Thank You for Your Attention

: Dose Assessment for Population around New NPP in Belarus. : 21011. : Dose Assessment for Population around New NPP in Belarus.ppt. zip-: 694 .

Dose Assessment for Population around New NPP in Belarus

Dose Assessment for Population around New NPP in Belarus.ppt
1 Dose Assessment for Population around New NPP in Belarus

Dose Assessment for Population around New NPP in Belarus

EMRAS II WG1 Meeting, Reference Methodologies for Controlled Discharges IAEA HQ, Vienna, 22-24 September 2009 Viktoryia Kliaus Minsk, Belarus

2 Where is Belarus situated

Where is Belarus situated

RUSSIA

BELARUS

UKRAINE

POLAND

3 Facts about Belarus

Facts about Belarus

Minsk

LOCATION - Eastern Europe An inland country. It is surrounded by Lithuania and Latvia to the northwest and Russia to the north and east. Ukraine lies to the south and southeast and Poland to the west TIME - GMT +2 AREA - 207,595 sq km (80,153 sq miles) POPULATION - 9,7 million (2009) CAPITAL CITY - Minsk - Population 1,7 million CURRENCY - Belarus Rubel (BYB) LANGUAGE(S) - Belarussian and Russian RELIGION(S) Christian with an Eastern Orthodox and Roman Catholic majority, Jewish and Muslim minorities

4 The Competence of State Organizations in the Area of Nuclear and

The Competence of State Organizations in the Area of Nuclear and

Radiation Safety

According to the Law About Radiation Safety of Population

Department of Nuclear and Radiation safety

Approve medical standards, rules and hygienic norms Established the unified system of control and registration of individual doses

Organize carrying out of the radiation monitoring of environment

Licensing

5 NPP in Belarus

NPP in Belarus

Type: NPP-2006; Reactor: WWR (PWR)-1200; General contractor: Atomstroieksport (Russia); Possible location: Ostrovets, Kukshinovo, Krasnaya Polyana areas; Planned construction time: 54 month; Lifetime at 90% capacity factor : expected 50 years; The WWR 1200 will produce: 1200 MW(e) electric power and 3200 MW(th) heat power.

Possible location of the NPP

6 NPP in Belarus

NPP in Belarus

Safety features: containment building and missile shield; Dose for public during normal operation: 100 Sv/year; During normal operation such types of NPP make an insignificant impact on environment (radiation impact no more than 0,1 0,01 from background radiation level).

Model of the Belarusian NPP

7 Regulatory limit values

Regulatory limit values

Dose limits in planned exposure situations

According to the Standards of Radiation Safety-2000

Type of limit

Type of limit

Dose limits

Dose limits

Occupational

Public

Effective dose

20 mSv/year, averaged over defined periods of 5 years, but it should not exceed 50 mSv in any single year

1 mSv/year for any consistent 5 years, but it should not exceed 5 mSv in any single year

8 Regulatory limit values

Regulatory limit values

Values of radioactive discharges from NPP with WWR-1000 in case of normal operation

NPP

NPP

Rare radioactive gases

I-131

-60

s-134

s-137

bq (% from leakage)

MBq (% from leakage)

MBq (% from leakage)

MBq (% from leakage)

MBq (% from leakage)

NPP with WWR-1000 and WWR-440

NPP with WWR-1000 and WWR-440

NPP with WWR-1000 and WWR-440

NPP with WWR-1000 and WWR-440

NPP with WWR-1000 and WWR-440

NPP with WWR-1000 and WWR-440

Novovoronezhskaya

110 (16)

1700 (9,4)

350 (4,7)

41 (4,6)

140 (7)

Kolskaya

4,2 (0,6)

134 (0,7)

88 (1,2)

0,01

53 (2,7)

Rostovskaya

0,2 (0,02)

57 (0,3)

0,8 (0,01)

0,2 (0,03)

0,1 (0,01)

Balakovskaya

0,2 (0,02)

223 (1,2)

7,7 (0,1)

2,4 (0,3)

7 (0,4)

Kalininskaya

49 (7)

512 (2,8)

4,1(0,1)

0,7 (0,1)

1,8 (0,1)

9 The Concept of Critical Group

The Concept of Critical Group

The critical group concept is used for the purpose of protection of the public in Belarus to characterize an individual who is representative of the most highly exposed individuals in the population (ICRP 1977, 1985); It is important to consider some aspects : The location and age distribution of the potentially exposed group; Dietary habits; Special occupational habits; The type of dwelling; Behavior factor.

10 The Concept of the Representative Person

The Concept of the Representative Person

For the purpose of protection of the public, it is necessary to characterize an individual who is representative of the most highly exposed individuals in the population. This individual is de?ned as the representative person. The representative person may be hypothetical. Nevertheless, it is important that the habits used to characterize the representative person are typical habits of a small number of individuals representative of those most highly exposed and not the extreme habits of a single member of population.

11 The Concept of the Representative Person

The Concept of the Representative Person

12 Dose assessment process

Dose assessment process

Sum to give annual effective dose for critical group

13 Total Effective Dose

Total Effective Dose

Total Effective Dose ET = total effective dose Eext = effective dose from external radiation Einh = committed effective dose from inhalation Eing = committed effective dose from ingestion

14 Effective Dose from Ingestion

Effective Dose from Ingestion

The dose from consumption of food or dirt:

Eing effective dose from ingestion, msv; f,i activity concentration in food of isotope i , kbq/kg; uf,i the amount of a food consumed by the population of interest, per day; cf5,i ingestion dose conversion, msv/kbq; dii days of intake is the period food is assumed to be consumed. If T1/2 > 21 days use 30 days. If T1/2 < 21 days use the mean life (m) of the isotope. 1/2 radiological half-life; RF reduction factor is the fraction of the contamination remaining after decay or some process j used to reduce the contamination before food is released for consumption.

15 Effective Dose from Ingestion

Effective Dose from Ingestion

Consumption of milk, l/day

Consumption of milk products, g/day

Age, years

Rural population

Urban population

Age, years

Rural population

Urban population

<1

10

70

<1

0,24

0,30

1-2

75

130

1-2

0,30

0,22

2-7

85

145

2-7

0,30

0,20

7-12

190

175

7-12

0,50

0,25

12-17

230

180

12-17

0,51

0,25

>17

260

180

>17

0,50

0,20

16 Effective Dose from Ingestion

Effective Dose from Ingestion

Consumption of leaf vegetables, g/day

Ingestion dose conversion, mSv/kBq

Age, years

Rural population

Urban population

Age, years

Age, years

Radionuclide

Radionuclide

Cs-137

I-131

<1

0

0

<1

2,1E-02

1,8E-01

1-2

3

3

1-2

1,2E-02

1,8E-01

2-7

6

7

2-7

9,6E-03

1,0E-01

7-12

20

18

7-12

1,0E-02

5,2E-02

12-17

28

25

12-17

1,3E-02

3,4E-02

>17

30

25

>17

1,3E-02

2,2E-02

17 Effective Dose from Inhalation

Effective Dose from Inhalation

The effective dose from inhalation

E ing Effective dose from inhalation, mSv Cair concentration of radionuclide in the air, Bq/m3 DCF effective inhalation dose conversion factor for adults, Sv/Bq BR breathing rate, m3/h t exposure durations, h

18 Effective Dose from Inhalation

Effective Dose from Inhalation

Breathing rate

Age, years

Breathing rate, m3/h

<1

2.86

1-2

5.17

2-7

8.72

7-12

14.2

12-17

20.11

>17

22.22

19 Doses from External Radiation

Doses from External Radiation

Thus external exposure is possible from the cloud with the radionuclides which are released from installations, by being on radioactively contaminated soil or swimming in contaminated water; The doses can be calculated from the activity concentrations in the environment by modeling and computation.

20 Doses from External Radiation

Doses from External Radiation

0,1 Sv/h

Natural dose rate

As planning doses levels are very low it will be a big uncertainties of dose assessment; The critical group will be persons who spend a lot of time outside.

Additional dose rate from the new NPP activity

21 Summary

Summary

For dose assessment of population around new NPP in Belarus from internal and external exposure are used: methods based on the monitoring of radiation situation round the NPP; peculiarity of food consumed by the population round the NPP.

22 Thank You for Your Attention

Thank You for Your Attention

Dose Assessment for Population around New NPP in Belarus
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