ML20125C295

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Summary of NRC 790803 Meeting Re Discuss Use of thyroid- Blocking Agents During Emergency
ML20125C295
Person / Time
Issue date: 08/15/1979
From: Harold Denton
Office of Nuclear Reactor Regulation
To: Ahearne J
NRC COMMISSION (OCM)
Shared Package
ML20125C287 List:
References
NUDOCS 8001080321
Download: ML20125C295 (3)


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MEMORAMDUM FOR:

Commissionerhhearne

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1 Harold R. Denton, Director', Office of Huclear Reactor

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SUSJECT:

USE OF THYROID BLOCKING AGEMTS.,.

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...:Q, In response to your July 30, 1979 memorandum on the above subject, a reeting was held on August 3,1979 in which tembers of the MRC staf f.who have been

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attendance list is enclosed..

e a In answer to your fu'rther coh.ents and question, and in summary of the teating.

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+< 'y we provide the follouing information:

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Our July 13, 1979 temorandun comment regarding a meeting with FD.i "to expedite consideration of the matter" can be further explained as follcws.

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"'n i The GSA Federal Register flotice of December 24,1975 (40 FR 59'N) on Radioic;ical Incident Emergency Response Planning:

Fixed Facilities aml A 9 Transi ortation, states the responsibilities as agreed between certain i

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. Federal Acencies. 'In delineating responsibilities, the GSA notice nahes G

the MRC the lead agency in radiological incident emergency r'es:cnse plan-l VFs'.

ning, training and other assis'tance covered in the notice. - EFA has,

-9 among other responsibilities, the establishment of Protective Action 5

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Guides, and recommendations as to appropriate protective actions which 1can be taken by government authorities to aceliorate the consequences

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of a radiological incideryt.

HEU has respons'ibility for essisting Stata O

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health departments, State hospital associations, etc., in the develop ent of plans for the prevention of adverse effects from exposu're to radiation..

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including the use of prophylactic drugs to reduce radiation dose to scec-

,b ific organs.

This includes health and medical care responses to radio-J +%

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~.1.~. logical incidents, consistent with guidelines issued by URC. -

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~ A 'tecting'of NRC sta'ff with the Bureau of Radiolo'gical Health of FDA is scheduled for August 21, 1979. This meeting will. discuss their plans for; L.], M -

providing further appropriate (medical) guidance, in view of the FDA pr j%

posed guidance (43 FR 58793) of Decenber 15,1976 (still not finalized)

W establishing actions to be taken in the event of a contaminating raditicy

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J ical incident, and the request (43 FR 58793) for subnissions f u drug

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..,.M applications for potassium iodide in oral dosage forms for use as a thyroid blocking agent. This latter request concluded that potassium' iodide is safe and effective for use as a thyroid-blocking agent in a

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-radiation emergency.

FDA approval of one company's drug application is. within a couple of weeks of being issued. As mentioned in our ear. lier

. response, URC R.G.1.101 already mentions' that use of radioprotective

. fj drugs should be c'onsidered for persons within the exclusion area. - -

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The majority of the staff present at the July 30 mee' ting agree that the '

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Aj use of potassium iodide as a thyroid blocking agent in the event of riate part possible inhalation or ingestion of radiciodine is an apprcp'ogram would T. '3 of a complete emergency preparedness ' program. A complete pr 1,~2@

. include countermeasures such as source interdiction,'. shMtering, evacua-

-W tion, respiratory protection, protective clothing, importing of foodstuffs d

and water, decentamination, chemical treatmant and o'thers. The major reason that some staff members disagree on use of KI-is that they believe that other measures in the above list are more inportant.for most radio-logical incidents and that a widespread stockpiling requirafaent for KI c, a would not be cost effective.

It is our intention, however, to press for

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FDA action in their role as the agency to supply medical guidance, as

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discussed above.

This will be a subject for the August 21 meeting.

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The action plan for promptly inproving (licensee) emergency preparedness j

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has been forwarded as SECY 79-450 of July 23, 1979, an information report.

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Unile that report does not specifically address the use of l'I, upgrading of licensee plan's to meet the guidance of R.G.1.101 will include the 1-review of their plan to use radioprotective drugs.

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Enclosure:

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Chairman Hendrie

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. Commissioner Bradford 1l" SECY OPE

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