Technological learning in development of nuclear fuel tube: a case of KAERI (Korea Atomic Energy Research Institute)

Photon spectra from beta sources of the Beta Secondary Standard BSS 2

“…With the data provided in this paper, the indication of dosemeters not intended to measure beta radiation, for example, personal dosemeters for the quantity H p (10), can be interpreted much better than before when irradiated in beta reference fields. For example, let a photon dosemeter for the quantity H p (10) be irradiated with a beta dose of H p (0.07) = 1 Sv using a 147 Pm source.…”

“…For example, let a photon dosemeter for the quantity H p (10) be irradiated with a beta dose of H p (0.07) = 1 Sv using a 147 Pm source. Assuming that the device indicates 3 mSv in terms of H p (10), then it is clear from table 1 that 0.8 mSv of the 3 mSv are due to photon radiation with a mean energy of about 50 keV, whereas 2.2 mSv are due to cross sensitivity to beta radiation. Such a cross sensitivity test is, for example, contained as a mandatory test in standards for dosemeters of the International Electrotechnical Commission (IEC) [12].…”

“…These two values are rather similar compared to the values at the time of measurement; from this it is concluded that the ratio of 146 Pm and 147 Pm may usually be between (1-2.5)•10 −5 at the time of source production. The decay branching ratios, photon emission intensities, and half-life times used in the calculations were taken from the Korean Atomic Energy Research Institute [10].…”

“…In the same way, the mean energy is given with respect to different quantities. It depends on the quantity, as photons of different energies contribute differently to the different quantities, for example, photons with 15 keV energy significantly contribute to H p (0.07) but almost not to H p (10). The dose values of the two promethium sources are slightly different due to the different contributions of 146 Pm.…”