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What is the dose rate at 2 feet from a 137Cs source?
Example: The dose rate at 2 feet from a 137Cs source is 10 mrem/hour. What is the dose rate at this point if a 2 inch (5 cm) lead shield is erected between the source and detector? [μ (for Pb, 662 keV gamma ray) = 1.23 cm-1] D = (10 mrem/hour) e[-1.23 * 5] = (10 mrem/hour)(0.00213) = 0.02 mrem/hour

Why is r 137 divided into parts 1 and 2?
It was identified that this would require some changes to the contents of Part 1. The separation of R 137 into Parts 1 and 2 was introduced to comply with the draft general format for OIML Recommendations, and ultimately has resulted in the drafting of the present publication which comprises both parts.

What has changed since the 2006 edition of R 137?
The major changes since the 2006 edition of R 137 are: the test methods regarding the influences of flow disturbances have been amended. This Recommendation comprises 3 parts:

What is OIML 137-1 & -2?
This publication - reference OIML R 137-1 & -2, Edition 2012 - was developed by Technical Subcommittee TC 8/SC 7 Gas meters. It was approved online for final publication by the International Committee of Legal Metrology in 2012 and will be submitted to the International Conference of Legal Metrology in 2012 for formal sanction.

[PDF File]Chapter 5 External Dose Calculations H-117 – Introductory ...
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¾The mass attenuation coefficient, μ/ρ,for 1 MeV photons for water is 0.07 cm2/g ¾To get the linear attenuation coefficient, we multiply by the density of the absorber material Calculating μ H-117 – Introductory Health Physics Slide 20 yy ¾The density of water is 1 g/cm 3 ¾(μ/ρ)(ρ) = (0.07 cm 2/g)(1 g/cm3) = 0.07 cm-1

[PDF File]Nuclear Medicine Physics Course - McGovern Medical School at ...
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Cs-137 I-123 (tablet) 0.66 Cs-137 I-131 1.29 ... 7 1+2+4 “ 0.00138 5 1+3a+4 “ 0.00064 Lab #1 Dose Calibrator (Last Update Sept 2017) Page 5 of 7 ...

[PDF File]Understanding Your Lab Results - Myeloma Central
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Multiple myeloma (MM) is a cancer of the blood—and the results of blood and other lab tests are important for diagnosing and monitoring MM. This resource provides you with definitions of values that are commonly monitored in MM and provides the range of levels that are considered normal for each. Use this tool to better understand your results.

[PDF File]Beta Dose Calculations • External beta dose rate not in ...
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rate – Cs-137, A = 10 mCi, d = 0.1 m What are the deep eye and shallow dose – What are the deep, eye, and shallow dose equivalent rates? – First calculate exposure rateFirst calculate exposure rate X A d 2 =Γ X 10 mCi 01 Ci 1000 mCi Ci =⋅ =ΓΓ22 m 1 5 0. 1 m

[PDF File]INTERNATIONAL OIML R 137-1 2 RECOMMENDATION
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OIML R 137-1&2:2012 (E) 6 . Part 1: Metrological and technical requirements . 1 Introduction . After OIML R 137-1 . Gas meters. was. published, the responsibility for this Recommendation was transferred to OIML TC 8/SC 7 and the secretariat began drafting Part 2 Metrological controls and performance tests

[PDF File]EQUATIONS USEFUL FOR RADIATION SAFETY - Wright State University
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A = (5 mCi) e[-0.693 * 21 days /14.3 days] = (5 mCi) e[-1.018] = (5 mCi)(0.361) = 1.8 mCi DISTANCE EQUATION. This equation uses the inverse square law to calculate the change in dose rate when a person moves farther or closer to a point source of x or γ radiation. where, D1 and D2 = dose rate (or intensity) at positions 1 and 2, respectively;

1 or 2 137 137 1 0 0 0