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TITLE 30ENVIRONMENTAL QUALITY
PART 1TEXAS COMMISSION ON ENVIRONMENTAL QUALITY
CHAPTER 336RADIOACTIVE SUBSTANCE RULES
SUBCHAPTER AGENERAL PROVISIONS
RULE §336.4Units of Radioactivity

For purposes of the rules in this chapter, activity is expressed in the special unit of curie (Ci) or in the International System of Units unit of becquerel (Bq), or its multiples, or disintegrations (transformations) per unit of time, as follows:

  (1) One curie (Ci) = 3.7 x 1010 disintegrations or transformations/second (dps or tps) = 3.7 x 1010 becquerel (Bq) = 2.22 x 1012 disintegrations or transformations/minute (dpm or tpm). Commonly used submultiples of the curie are as follows. One millicurie (mCi) = 1 x 10-3 Ci = 3.7 x 107 dps. One microcurie (microCi) = 1 x 10-6 Ci = 3.7 x 104 dps. One nanocurie (nCi) = 1 x 10-9 Ci = 3.7 x 10 dps. One picocurie (pCi) = 1 x 10-12 Ci = 3.7 x 10-2 dps.

  (2) One becquerel (Bq) = 1 disintegration or transformation/second (dps or tps).


Source Note: The provisions of this §336.4 adopted to be effective June 5, 1997, 22 TexReg 4588

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