# NRC CAL – NOV (SL III)
> **EA-17-082** · CAL · Severity SLIII · Issued 2017-09-21 · Materials Licensees
## Action
- **EA Number:** EA-17-082
- **Licensee:** NOV (SL III)
- **Category:** Materials Licensees
- **Action type:** CAL
- **Severity level:** SLIII
- **Date issued:** 2017-09-21
## Description

On September 21, 2017, the NRC issued a Notice of Violation to Washington University for a Severity Level III violation associated with a medical event. An inspection was conducted on February 1 and 2, 2017, at the St. Louis, Missouri campus and determined that a medical event occurred on April 8, 2016, where the licensee staff had sufficient information on April 16, 2016, to discover the event and make the appropriate notification to the NRC; however the notification was not made until January 31, 2017. Specifically, the administration of radiation from a yttrium-90 microspheres treatment resulted in a dose that exceeded 0.5 Sv (50 rem) to tissue and 50 percent or more of the dose expected from the administration defined in the written directive to tissue other than the treatment site. This is a medical event as defined in 10 CFR 35.3045(a)(3).

## Source
- [Full enforcement letter (PDF)](https://www.nrc.gov/docs/ML1726/ML17268A259.pdf)
- [NRC Materials Licensees index](https://www.nrc.gov/reading-rm/doc-collections/enforcement/actions/materials/)
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