RPR-20

Personal dose equivalent Hp(10)

Hp(10) = hp_K K. Badge operational quantity, 10 mm under the badge.

Reading speed

OperationalICRU 51 Hp(10)

Governing equation

H_p(10)=h_{pK}K

where

K: Air kerma at badge (µGy)
h_{pK}: Conversion hp,K (Sv/Gy)
H_p(10): Personal dose equivalent (µSv)

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-20 — Personal dose equivalent Hp(10)) is the form associated with ICRU 51 Hp(10). Working symbols: $K$ , $h_{pK}$ $\rightarrow$ $H_p(10)$ . Hp(10) estimates effective dose for penetrating photons. Hp(0.07) is the skin/extremity quantity.

Purpose

Purpose: compute

H_p(10)

from

K

h_{pK}

in Radiation protection via

H_p(10)=h_{pK}K

Hp(10) = hp_K K. Badge operational quantity, 10 mm under the badge. 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

K = 8.000\,\mathrm{\mu Gy}

h_{pK} = 1.120\,\mathrm{Sv/Gy}

, the governing relation

H_p(10)=h_{pK}K

yields

H_p(10) = 8.96\,\mathrm{\mu Sv}

. A lapel badge on a slab phantom. Move a slider: the numbers are this situation, not a canned story.

Calculator

Inputs

Air kerma at badge K8 µGyConversion hp,K h_{pK}1.12 Sv/Gy

Outputs

Personal dose equivalent H_p(10)8.96 µSv

Reading speed

Watch on YouTube

Free library

Full library

Free PDF / open book

YouTube channels

00:0 / 00:08

Narration of this film

A lapel badge on a slab phantom.

Hp(10) estimates effective dose for penetrating photons. Hp(0.07) is the skin/extremity quantity.

Reading speed

Watch on YouTube