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NIST Revises Primary Standard for Radium-223 (Ra-223)

January 21, 2016

NRC has issued Information Notice (IN) 2016-03, “Revision to the National Institute of Standards and Technology Standard for Radium-223 and Impact on Dose Calibration for the Medical Use of Radium-223 Dichloride.” The notice is intended to alert recipients that the National Institute of Standards and Technology (NIST) has revised its primary standard for radium-223 (Ra-223) and to convey the impact this revision will have on the calibration of patient doses of Ra-223 dichloride (trade name Xofigo®). Recipients have been asked to review the notice for information applicable to their facilities and consider taking appropriate action, if necessary.

The IN can be found in NRC’s generic communications website at http://www.nrc.gov/reading-rm/doc-collections/gen-comm/info-notices/2016/.