RPR-42

TVL

Tenth-value layer.

Reading speed

GoverningTVL

Governing equation

TVL=\\ln 10/\\mu

where

mu: mu (1/cm)
tvl: TVL (cm)

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-42 — TVL) is the form associated with TVL. Working symbols: $mu$ $\rightarrow$ $tvl$ . Tenth-value layer. Pedagogical SI sheet with a live model and a swept parameter.

Purpose

Purpose: compute

tvl

from

mu

in Radiation protection via

TVL=\\ln 10/\\mu

Tenth-value layer. 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

mu = 0.150\,\mathrm{1/cm}

, the governing relation

TVL=\\ln 10/\\mu

yields

tvl = 15.351\,\mathrm{cm}

. One governing identity, SI units, a single sweep on the sheet. Move a slider: the numbers are this situation, not a canned story.

Calculator

Inputs

mu mu0.15 1/cm

Outputs

TVL tvl15.351 cm

Reading speed

Watch on YouTube

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Narration of this film

One governing identity, SI units, a single sweep on the sheet.

Tenth-value layer. Pedagogical SI sheet with a live model and a swept parameter.

Reading speed

Watch on YouTube