Radiation Protection Regulations 1982 (SR 1982/72) (as at 01 January 1999)

Regulation by clause

Schedule 1
Activities and concentrations of radioactive materials

rr 2, 4

1 Interpretation
  • (1) One becquerel is an activity of 1 transformation per second.

    (2) For the purposes of these regulations, when the transformation of the atoms of a radionuclide gives rise to another radionuclide, the activity is measured by the rate of transformation of the first or parent radionuclide only.

    (3) The classification of any radionuclide may, if it is not shown in clause 2 or clause 3, be obtained on application to the Director of the National Radiation Laboratory.

2 Groups of radionuclides in relation to activities
  • The groups of radionuclides referred to in paragraph (a) of regulation 4(1), and the corresponding activities are those set out in the following table:

    Activity referred to in regulation 4(1)(a) Radionuclides (listed by symbols)
    3 kilobecquerels Ra–226, Ra–228, Ac–227, Th–228, Th–230, Th–232, Pa–231, U–232, Np–237, Pu–238, Pu–239, Pu–240, Pu–242, Pu–244, Am–241, Am–242m, Am–243, Cm–242, Cm–244, Cf–252
    10 kilobecquerels Nd–144, Sm–147, Pb–210, U–233, U–234, U–235, U–236, U–238, Pu–241
    30 kilobecquerels P–32, Ti–44, Rb–86, Sr–89, Sr–90, Y–91, Ru–106, Cd–115m, In–114m, Sn–125, Te–129m, Ce–144, Po–208, Po–210, Ra–223, Th–227, Th–234, U–230
    100 kilobecquerels K–40, As–76, Y–90, Sb–122, Sb–124, Te–132, I–129, I–131, Ba–140, Dy–166, Rn–222, Ra–224
    300 kilobecquerels Na–22, Na–24, K–42, Ca–47, Sc–46, V–48, Mn–52, Fe–59, Co–60, Ga–67, As–74, Y–88, Zr–95, Mo–99, Ag–110m, Cd–115, Te–131m, Cs–134, Cs–136, Cs–137, Ba–133, La–140, Ce–143, Eu–152B, Eu–154, Tb–160, Ho–166, Tm–170, Ta–182, Re–188, Os–185, Ir–192, Au–195, Bi–206, Bi–207, Bi–210, Pa–230
    1 megabecquerel Cl–36, Sc–48, Mn–54, Co–56, Co–58, Zn–65, Ga–72, As–73, Se–75 Br–82, Kr–85, Sr–85, Y–87, Nb–95, Tc–96, Ru–103, Ag–105, Ag–111, Sn–113, In–115, Sb–125, Te–127m, I–126, La–138, La–140, Ce–141, Pr–143, Nd–147, Pm–149, Yb–164, Lu–176, Hf–181, W–181, Re–183, Re–186, Os–193, Ir–190, Pt–193m, Pt–193, Au–196, Au–198, Tl–202, Tl–204, Th–231
    3 megabecquerels Ca–45, Sc–47, Cr–51, Mn–56, Co–57, Ge–71, As–77, Rb–87, Zr–93, Tc–97, Tc–97m, Tc–99, Ru–97, Pd–103, Cd–109, In–111, Sn–119m, Te–125m, I–125, Xe–133, Cs–131, Ba–131, Pm–147, Sm–151, Sm–153, Eu–155, Yb–169, Yb–175, Lu–177, W–185, Os–191, Pt–191, Au–199, Hg–197m, Hg–197, Hg–203, Tl–200, Tl–201, Pb–203, Pa–233, Np–239
    10 megabecquerels Be–7, C–14, Fe–55, Ni–63, I–132, Xe–131m, Cs–135, Gd–153, Er–169, Tm–171, Rh–105
    30 megabecquerels F–18, P–33, S–35, Ni–59, Nb–93, I–123, Re–187
    100 megabecquerels Cu–64, Sr–87m, Tc–99m
    300 megabecquerels In–113m
    1 gigabecquerel H–3
    300 gigabecquerels Ar–37
3 Groups of radionuclides in relation to concentration
  • The groups of radionuclides referred to in paragraph (b) of regulation 4(1) and the corresponding concentrations, are those set out in the following table:

    Concentration referred to in regulation 4(1)(b) Radionuclides (listed by symbols)
    100 kilobecquerels per kilogram Na–22, Sc–46, Ti–44, V–48, Mn–52, Mn–54, Fe–59, Co–56, Co–58, Co–60, Zn–65, Y–88, Zr–95, Ag–110m, In–111, In–113m, Sb–124, Cs–134, Cs–136, Cs–137, Ba–133, Ba–140, La–138, La–140, Sm–147, Eu–152, Eu–154, Tb–160, Yb–169, Lu–176, Ta–182, Os–185, Ir–192, Pb–210, Bi–206, Bi–207, Po–208, Ra–226, Ra–228, Ac–227, Th–228, Th–230, Th–232, Pa–231, U–232, U–233, U–234, U–235, U–236, U–238, Np–237, Pu–238, Pu–239, Pu–240, Pu–241, Pu–242, Pu–244, Am–241, Am–242m, Am–243
    300 kilobecquerels per kilogram Na–24, K–40, Ca–47, Sc–48, Co–57, Ga–67, Ga–72, As–74, Se–75, Br–82, Sr–85, Sr–90, Y–87, Nb–95, Tc–96, Ru–106, Ag–105, Sn–113, Te–131m, Te–132, I–126, I–129, Ba–131, Ce–144, Hf–181, Re–183, Ir–190, Pt–193, Au–195, Hg–203, Tl–202, Po–210, Rn–222, Ra–223, Ra–224, Th–227, U–230
    1 megabecquerel per kilogram Mn–56, Rb–86, Y–91, In–114m, Sn–119m, Sb–122, Sb–125, Te–129m, I–131, I–132, Eu–155, Gd–153, Yb–164, W–181, Au–196, Au–198, Tl–200, Tl–204, Pb–203, Th–234, Pa–230
    3 megabecquerels per kilogram Be–7, F–18, P–32, Cl–36, K–42, Sc–47, Cr–51, Cu–64, As–76, Kr–85, Sr–89, Y–90, Mo–99, Ru–97, Ru–103, Cd–109, Cd–115, Cd–115m, Sn–125, Te–125m, Te–127m, I–125, Cs–131, Ce–141, Ce–143, Nd–147, Dy–166, Tm–170, Os–191, Pt–191, Au–199, Tl–201, Bi–210, Np–239
    10 megabecquerels per kilogram Ca–45, As–73, Tc–97, Tc–99, Tc–99m, Rh–105, Ag–111, I–123, Xe–131m, Xe–133, Pr–143, Pm–149, Sm–153, Ho–166, Yb–175, W–185, Re–186, Re–188, Os–193, Hg–197, Hg–197m, Pa–233
    30 megabecquerels per kilogram C–14, P–33, Ni–63, As–77, Zr–93, Nb–93m, Tc–97m, Pd–103, Cs–135, Pm–147, Sm–151, Er–169, Tm–171, Lu–177

    100 megabecquerels per kilogram
     S–35, Fe–55, Ni–59, Sr–87m, Pt–193m, Th–231
    300 megabecquerels per kilogram Ar–37, Ge–71
    3 gigabecquerels per kilogram H–3