RPR-24

Transport index

TI = Ḣ(1 m) / 10 with Ḣ in µSv/h. The package label number.

Reading speed

TransportIAEA SSR-6 TI

Governing equation

\mathrm{TI}=\dot H(1\,\mathrm{m})/10

$\dot H \in \left[0.1, 2000\right]$

where

\dot H: Max rate at 1 m (µSv/h)
TI: Transport index (—)

The figure, part by part

Each numbered marker wears the color of its card. Hover a card to light the marker. Tap a marker to jump to that card. The slider walks a red point along the curve; Animate drawing traces it like a pen.

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①

Governing law — red

\mathrm{TI}=\dot H(1\,\mathrm{m})/10

$\dot H \in \left[0.1, 2000\right]$

$\dot H = 0.1$ $TI = 0.01$

Along the curve

②

Domain of the variable — blue

\dot H_{\min} = 0.1,\quad \dot H_{\max} = 2000

$\dot H \in \left[0.1, 2000\right]$

$\dot H = 0.1$ $\dot H = 0.1$

Along the curve

③

Response curve — green

\mathrm{TI}=\dot H(1\,\mathrm{m})/10

$\dot H \in \left[0.1, 2000\right]$

$\dot H = 0.1$ $TI = 0.01$

Along the curve

④

Rate of change — amber

\frac{\mathrm{d}TI}{\mathrm{d}\dot H}

$\dot H \in \left[0.1, 2000\right]$

$\dot H = 12.68$ $TI^{\prime} = 0.1$

Along the curve

Lecture brief

Historical brief

Inverse-square, half-value layer, ICRP weighting and ALARA are the protection craft since the 1920s commissions. The lab computes transmission, equivalent dose and a shielding snapshot. This sheet (RPR-24 — Transport index) is the form associated with IAEA SSR-6 TI. Working symbols: $\dot H$ $\rightarrow$ $TI$ . IAEA: TI is 100 × the maximum mSv/h at 1 m, rounded up. TI = 0 is excepted; TI ≤ 10 is Yellow-II; above is Yellow-III or exclusive use.

Purpose

Purpose: compute

TI

from

\dot H

in Radiation protection via

\mathrm{TI}=\dot H(1\,\mathrm{m})/10

TI = Ḣ(1 m) / 10 with Ḣ in µSv/h. The package label number. Use it when a real radiation protection question must be answered in SI before a code check.

Live realistic example

In symbols

Live case. Given

\dot H = 20.000\,\mathrm{\mu Sv/h}

, the governing relation

\mathrm{TI}=\dot H(1\,\mathrm{m})/10

yields

TI = 2.00\,\mathrm{—}

. A Type-A package and a survey at one metre. Move a slider: the numbers are this situation, not a canned story.

Calculator

Inputs

Max rate at 1 m \dot H20 µSv/h

Outputs

Transport index TI2.00 —

Reading speed

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Narration of this film

A Type-A package and a survey at one metre.

IAEA: TI is 100 × the maximum mSv/h at 1 m, rounded up. TI = 0 is excepted; TI ≤ 10 is Yellow-II; above is Yellow-III or exclusive use.

Reading speed

Watch on YouTube