Working level

Working level (WL) is a historical unit of concentration of radioactive decay products of radon, applied to uranium mining environment.^[1] One working level refers to the concentration of short-lived decay products of radon in equilibrium with 3,700 Bq/m³ (100 pCi/L) in air. These decay products would emit 1.3 × 10⁵ MeV in complete decay.^[2] The Nuclear Regulatory Commission uses this definition.^[3]

Working level month (WLM) is a closely related quantity, referring to exposure to one working level for 170 hours per month. This comes from assuming a 40-hour work week.

In 2002, the NRC regulations limited exposure in mines to 0.3 WL, which was comparable with the standards of International Commission on Radiological Protection at the time.^[2]

1. ^ Vaillant, Ludovic; Bataille, Céline (September 2012). "Management of radon: a review of ICRP recommendations". Journal of Radiological Protection. 32 (3): R3. Bibcode:2012JRP....32R...1V. doi:10.1088/0952-4746/32/3/R1. PMID 22809956. S2CID 2423305.
2. ^ ^{a b} Shapiro, Jacob (June 2002). Radiation Protection: A Guide for Scientists, Regulators, and Physicians (4th ed.). Harvard University Press. p. 444. ISBN 9780674007406. Retrieved September 16, 2016.
3. ^ "NRC Regulations Title 10, Code of Federal Regulations Part 20.1003". United States Nuclear Regulatory Commission. Retrieved 16 September 2016.

This unit of measurement related article is a stub. You can help Wikipedia by expanding it.

• v
• t
• e

This article about mining is a stub. You can help Wikipedia by expanding it.

• v
• t
• e