RE: Doses to fetus / P-32

["Flanigan, Floyd" <Floyd.Flanigan@nmcco.com>]

Here's an example Mark:



NIH performed an assessment of Dr. Ma's intake of P-32, the resultant radiation exposure received by Dr. Ma,

and the radiation exposure received by her fetus. In its initial notification to NRC on July 3, 1995, NIH indicated

that its estimated ingestion for Dr. Ma was approximately 300 microcuries (Ci) or 11.1 megabequerel (MBq) of

P-32.(2) On August 29, 1995, NIH reassessed Dr. Ma's dose and calculated her effective dose equivalent to be

4.17 rem [41.7 millisievert (mSv)], based upon an intake of 500 Ci (18.5 MBq), and the dose to her fetus to be

3.2 rem (32 mSv). Most recently, on July 30, 1996, NIH revised its committed effective dose equivalent

(CEDE) estimates for Dr. Ma to between 4.7 and 7.0 rem (47 and 70 mSv), corresponding to an intake range of

between 570 and 840 Ci (21.1 and 31.1 MBq). The revised dose to the fetus was between 3.7 and 5.4 rem (37

and 54 mSv). Additional discussion of NIH's dose estimates appears in Section III.K., below.

NRC's estimates indicate that Dr. Ma ingested between 30.3 and 48.1 MBq (820 and 1300 Ci) of P-32. Based on

these values, Dr. Ma's estimated internal CEDE was between 80 and 127 mSv (8.0 and 12.7 rem). The annual

occupational exposure limit applicable to Dr. Ma was, however, 5 mSv (5 rem) total effective dose equivalent

per 10 C.F.R. §20.1201(a)(1)(i). The estimated dose received by Dr. Ma's fetus was between 51 and 81 mSv

(5.1 and 8.1 rem).



So the fetus gets approximately 76.7% of the dose the mother gets from th P-32 injestion.

Floyd W. Flanigan B.S.Nuc.H.P.



-----Original Message-----

From: owner-radsafe@list.vanderbilt.edu

[mailto:owner-radsafe@list.vanderbilt.edu]On Behalf Of

mark.ramsay@ionactive.co.uk

Sent: Wednesday, February 18, 2004 11:05 AM

To: 'RadSafe Send Message

Subject: Doses to fetus / P-32





Greetings All



I do not have my ICRP 88 to hand ...



anyone have the data to calculate the intake of P-32 required to give the

fetus 1mSv  (from inhalation and / or ingestion) ?



cheers



Mark



http://ionactiveweb.adflix.com/IonActive_Forum/index.php







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