ML20147G946
| ML20147G946 | |
| Person / Time | |
|---|---|
| Issue date: | 01/22/1997 |
| From: | Michele Burgess NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Oconnell R NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| Shared Package | |
| ML20147G900 | List: |
| References | |
| SSD, NUDOCS 9703280387 | |
| Download: ML20147G946 (1) | |
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Memorandum To:
R. O'Connell Regional Coordination & Events Section Operations Branch Division of Industrial and Medical Nuclear Safety, NMSS From:
M. Burgess
-7YILb Scaled Source Safety Section Medical, Academic, and Commercial Use Safety Branch Division of indu'strial and Medical Nuclear Safety, NMSS Date:
January 22,1997 RE:
Trijicon Allegation The following information is provided to the Allegation Review Boara (ARB) in response to your request for an evaluation and recommendation regarding failure types and rates of Trijicon's tritium gunsights, and closes out our input.
In a letter dated December 3,1996, Mr. Stephen Bindon, of Trijicon, provided information concerning failure types and rates for Trijicon's tritium gunsights, in response to our October 17, 1996, request for information. He did not provide the requested information regarding Trijicon's recommended mounting procedures.
Based on the information in the letter, there is no indication of a product quality problem with regard to radiation safety. Mr. Bindon reports that 1,910,795 were distributed from 1985 to August 1996. Assuming a uniform distribution rate over 11 years results in a value of approximately 14475 light sources distributed per month. According to the letter, since September 1994, an average of 39 totallight sources per month are returned for replacement.
This constitutes approximately 0.269% of the total product distributed per month. Of these 39 light sources,7 light sources per month were reported to be returned due to failures involving causes that might be linked to generic product quality. This constitutes approximately 0.048%
of the light sources distributed per month. Please note that, in light of these low numbers, we did not feel that it was necessary to review the recommended mounting procedures.
Please be aware that we are still addressing Mr. Bindon's request that portions of the material submitted in his letter be held proprietary. The information listed in this memorandum does not contain data that Mr. Bindon has requested be held proprietary.