Sealed Source Leak Test Result and Next Due Date (10 CFR 35.67)
Sealed source leak test: the wipe activity and whether the source is leaking.
Open the tool → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Exemption under 35.67
- None of these: a leak test is required
- Net counts per minute on the wipe
- 500 cpm
- Counter efficiency
- 10 %
- Date of the leak test
- 2026-10-01
Result: 0.00225 µCi (83.3 Bq) of removable contamination: below the 0.005 µCi (185 Bq) level. Next test due by April 1, 2027.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Exemption under 35.67(f)
- Net counts per minute on the wipe
- Counter efficiency
- Date of the leak test (YYYY-MM-DD, optional)
How this is calculated
Citation
10 CFR 35.67(b), (c), (e) and (f): leak test at intervals not to exceed 6 months; 185 Bq (0.005 microcurie) or more of removable contamination is a leaking source; exemptions. 10 CFR 35.3067: report within 5 days. Read the sources: 10 CFR 35.67 ↗, 10 CFR 35.3067 ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.