ISO 21909-2:2021 pdf download – Passive neutron dosimetry systems — Part 2: Methodology and criteria for the qualification of personal dosimetry systems in workplaces.
3.2.5 personal dose equivalent H p (d) dose equivalent in soft tissue at an appropriate depth, d, below a specified point on the human body Note 1 to entry: The unit of personal dose equivalent is joule per kilogram (J·kg −1 ) and its special name is sievert (Sv). Note 2 to entry: The specified point is usually given by the position where the individual’s dosimeter is worn. [SOURCE: ICRP 103:2007] 3.2.6 ambient dose equivalent H*(10), H’(0,07) or H’(3) dose equivalent that would be produced by the corresponding aligned and expanded field in the ICRU sphere at a depth, d, on the radius opposing the direction of the aligned field [SOURCE: IAEA – Radiation Protection and Safety of Radiation Sources: International Basic Safety Standards – Interim Edition IAEA Safety Standards Series GSR Part 3, 2011] 3.2.7 conversion coefficient h pΦ (10,E,α) quotient of the personal dose equivalent at 10 mm depth, H p (10), and the neutron fluence, Φ, at a point in the radiation field used to convert neutron fluence into the personal dose equivalent at 10 mm depth in the ICRU tissue slab phantom, where E is the energy of the incident neutrons impinging on the phantom at an angle α Note 1 to entry: The unit of the conversion coefficient is Sv⋅m 2 . A commonly used unit of the conversion coefficient is pSv⋅cm 2 .
3.3 Calibration and evaluation 3.3.1 conventional true value for the neutron personal dose equivalent H conv quantity value attributed by agreement to a quantity for a given purpose Note 1 to entry: The conventional value H conv is the best estimate of the quantity to be measured, determined by a primary standard or a secondary or working measurement standard which are traceable to a primary standard. Note 2 to entry: in this document, the quantity is the neutron personal dose equivalent. [SOURCE: ISO/IEC Guide 99:2007, 2.12, modified — the term was changed.] 3.3.2 calibration operation that, under specified conditions, in a first step, establishes a relation between the quantity values with measurement uncertainties provided by measurement standards and corresponding readings with associated measurement uncertainties and, in a second step, uses this information to establish a relation for obtaining a measurement result from an indication Note 1 to entry: Calibration may be expressed by a statement, calibration function, calibration diagram, calibration curve, or calibration table. In some cases, it may consist of an additive or multiplicative correction of the indication with associated measurement uncertainty. Note 2 to entry: Calibration should not be confused with adjustment of a measuring system, often mistakenly called “self-calibration”, or with verification of calibration. Note 3 to entry: Often, the first step alone in the above definition is perceived as being calibration.