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Annual radiation dose limits — NRB-99/2009

Share of the annual limit

mSv

Annual effective dose = external dose for the calendar year + committed dose from intake in the same year (para. 3.1.5). Natural, medical and accident doses are not included (para. 3.1.3).

Result

16 %Within the basic limit
Of the 5-year averaged limit
20 mSv
Of the single-year ceiling
6.4 % (50 mSv)

Table 3.1 — Basic dose limits (СанПиН 2.6.1.2523-09)

Normalised quantityPersonnel, group APersonnel, group Б (¼ A)Public
Effective dose20 mSv per year averaged over any 5 consecutive years, but not more than 50 mSv per year5 mSv per year averaged over any 5 consecutive years, but not more than 12.5 mSv per year1 mSv per year averaged over any 5 consecutive years, but not more than 5 mSv per year
Equivalent dose per year in the eye lens150 mSv37.5 mSv15 mSv
Equivalent dose per year in the skin500 mSv125 mSv50 mSv
Equivalent dose per year in hands and feet500 mSv125 mSv50 mSv
Notes to Table 3.1
(1) Simultaneous exposure up to the stated limits for all normalised quantities is allowed.(2) The basic dose limits, like all other permissible exposure levels for group Б personnel, are equal to ¼ of the values for group A personnel.(3) Refers to the dose at a depth of 300 mg/cm².(4) Refers to the value averaged over 1 cm² in the basal layer of skin 5 mg/cm² thick under a 5 mg/cm² cover layer (40 mg/cm² on the palms). The limit for facial skin ensures the lens limit for beta particles is not exceeded.

Key provisions of section 3

3.1.4. Effective dose for personnel must not exceed 1,000 mSv over the working life (50 years), and for the public 70 mSv over the lifetime (70 years). The periods count from 1 January 2000.3.1.8. Women under 45 working with sources: equivalent dose on the surface of the lower abdomen not more than 1 mSv per month, and annual intake of radionuclides not more than 1/20 of the annual intake limit for personnel. During pregnancy and breastfeeding women are transferred to work not involving sources.3.1.9. Students and trainees over 16 undergoing professional training with sources: annual doses must not exceed the group Б values.3.2.1–3.2.2. Planned elevated exposure of group A personnel is allowed only to save people or prevent their exposure — for men, as a rule, over 30, with voluntary written consent. Up to 100 mSv per year and 2× the equivalent-dose values — with permission of the regional sanitary authority; up to 200 mSv and 4× — only the federal authority.3.2.3. After an effective dose above 100 mSv in a year, further work is limited to 20 mSv per year. A dose above 200 mSv in a year is potentially dangerous: the person is removed from the exposure zone and sent for medical examination; further work only individually, by decision of a medical commission.4.1. Effective dose from natural sources at work for all workers, including personnel, must not exceed 5 mSv per year.
Comparison with IAEA GSR Part 3 / ICRP 103
Normalised quantityOccupational, НРБ-99/2009 (group A)Occupational, IAEA GSR Part 3Public, НРБ-99/2009Public, IAEA GSR Part 3
Effective dose20 mSv (≤ 50 mSv/yr)20 mSv (≤ 50 mSv/yr)1 mSv (≤ 5 mSv/yr)1 mSv
Equivalent dose per year in the eye lens150 mSv20 mSv (≤ 50 mSv/yr)15 mSv15 mSv
Equivalent dose per year in the skin500 mSv500 mSv50 mSv50 mSv
Equivalent dose per year in hands and feet500 mSv500 mSv50 mSv50 mSv
The only material difference is the occupational lens limit: 150 mSv in НРБ-99/2009 versus 20 mSv per year averaged over 5 years (≤ 50 mSv in a year) in GSR Part 3 after the ICRP 2011 statement. In the Russian Federation only the НРБ-99/2009 values apply.

Related calculators

Individual dose Hp(10)Dose rateDose unitsShielding
Source and statusСанПиН 2.6.1.2523-09 «Radiation safety standards НРБ-99/2009», Table 3.1 and paragraphs 3.1.1–3.2.4, 4.1; approved by Decree No. 47 of the Chief State Sanitary Physician of 7 July 2009. Values are reproduced verbatim; group Б is derived from note 2.In force as of September 2026. СанПиН 2.6.4115-25 (from 1 September 2025) consolidated the sectoral sanitary rules but did not replace НРБ-99/2009 and refers to its Table 3.1. Reference only — verify against the current text of the standard before any regulatory decision.

Dose limits of НРБ-99/2009 — how to read Table 3.1

What Table 3.1 regulates

The basic dose limits of НРБ-99/2009 (СанПиН 2.6.1.2523-09, the Russian radiation safety standards) cap man-made exposure under normal conditions. For group A personnel the effective dose is limited to 20 mSv per year averaged over any 5 consecutive years but not more than 50 mSv in a year; for the public — 1 mSv per year averaged over 5 years but not more than 5 mSv. The annual equivalent dose to the eye lens (150 and 15 mSv), skin, hands and feet (500 and 50 mSv) is limited separately.

Group Б personnel are workers who do not handle sources directly but stay within their field of influence. Their limits are not spelled out in the table: by note 2 they equal one quarter of the group A values — 5 mSv per year of effective dose (not more than 12.5 mSv in a year), 37.5 mSv to the lens, 125 mSv to the skin, hands and feet. The same values apply to students over 16 trained with sources (para. 3.1.9).

What the limits exclude

The dose limits do not include natural and medical exposure or doses from radiation accidents — those are restricted separately (para. 3.1.3). The annual effective dose is the external dose for the calendar year plus the committed dose from radionuclide intake in the same year (para. 3.1.5). Over 50 years of work personnel must not accumulate more than 1000 mSv, and the public more than 70 mSv over a 70-year lifetime (para. 3.1.4).

Planned elevated exposure

Exceeding the limits is allowed only to prevent an accident or mitigate its consequences in order to save people — for men, as a rule, over 30, with voluntary written consent. Up to 100 mSv per year and twice the equivalent-dose values is permitted by the regional sanitary authority, up to 200 mSv and four times — only by the federal one (paras 3.2.1–3.2.2). After more than 100 mSv in a year further work is limited to 20 mSv per year; above 200 mSv the worker is removed from the zone and sent for medical examination (para. 3.2.3).

Document status and comparison with the IAEA

НРБ-99/2009 remains in force: the new СанПиН 2.6.4115-25, effective 1 September 2025, consolidated the sectoral sanitary rules on ionising radiation sources but did not replace the standards and refers to their Table 3.1. The international limits of IAEA GSR Part 3 and ICRP 103 match НРБ for effective dose, skin and extremities; the one material difference is the occupational lens limit — 150 mSv in НРБ against 20 mSv per year averaged over 5 years at the IAEA. For regulatory decisions in Russia only the НРБ values apply — always check the current text of the standard.

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The individual dose Hp(10) calculator converts dosimeter readings into dose; the dose-rate and shielding calculators give the dose rate from a source and the shielding thickness; the dose-unit converter translates mSv, rem and Gy.

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