ML20204E546
| ML20204E546 | |
| Person / Time | |
|---|---|
| Issue date: | 03/18/1999 |
| From: | Camper L NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS) |
| To: | Pandey S NUCLEAR RESEARCH CORP. |
| References | |
| NUDOCS 9903250066 | |
| Download: ML20204E546 (2) | |
Text
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March 18, 1999 l
S. Pandey, Ph.D.
Vice President of Engineering Nuclear Research Corporation 125 Titus Avenue Warrington, PA 18976 l
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Dear Dr. Pandey:
l Thank you for your letter dated December 16,1998, in which you provided a copy of the operating manual for the Model GP-100C(V6) detector and the customer list (non-power plant and non-intemational). After reviewing the operating manual for this detector, NRC stin has concems that users may not be fully aware of potential zeroing problems. The operating manual specifies an operating range of 0.01 Rih to 10,000 R/h; however, there is no mention of potential zeroing problems in high radiation fields or the possibility of detector failJre after l
receiving a hioh total integrated dose.
While I do understand your view that it is industry knowledge that integrated circuits fail after a total dose of 1000 rads, I am concemed that users of this detector may not be fully aware of this potential problem. While the number of customers using this detector is relatively small, I believe that the possible failure of this detector in high radiation fields is a potential risk to public health and safety.
As discussed previously with you by John Jankovich, Ph.D., NRC would like Nuclear Research Corporation to send a notice to customers (non-power plant and non-intemational) explaining this potential problem. I would appreciate receiving a copy of the notice, if Nuclear Research Corporation chooses not to send a notice, NRC will consider including an article in the quarterly Nuclear Materials Safety and Safeguard newsletter that will explain the potential failure of instrumentation in high radiation fields, particularly after a total high integrated dose.
If you would like to discuss this further, please contact me at (301) 415-7231.
Sincerely, (orig. signed by)
Larry W. Camper, Chief Materials Safety Branch Division of Industrial and kfg Medical Nuclear Safety Distribution: closes imns7134 IMNS r/f '
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S. Pandey, Ph.D.
j Vice President of Engineering Nuclear Research Corporation 125 Titus Avenue Warrington, Pennsylvania 18976
Dear Dr. Pandey:
Thank you for your letter dated December 16,1998, in which you provid a copy of the operating manual for the Model GP-100C(V6) detector and the custo r list (non-power plant and non-international). After reviewing the operati g manual for th' detector, NRC still has concems that users may not be fully aware of pote:ntial zeroing oblems. The operating manual specifies an operating range of 0.01 R/h to 10,000
- however, there is no niention of potential zeroing problems in high radiation fields or the po ibility of detector failure after receiving a high total integrated dose.
/
While i do understand your view that it is industry,kn/
owledge that integrated circuits fail after a total dose of 1000 rads, I am concemed that usprs of this detector may not be fully aware of this I
potential problem. While the number of customers using this detector is relatively small, I believe that the possible failure of this deteptor in high radiation fields is a potential risk to public health and safety.
/
l As discussed previously with you by, ohn Jankovich, Ph.D., NRC would like Nuclear Research Corporation to send a notice to customers (non-power plant and non-international) explaining this potential problem. I would ap'preciate a copy of the notice. If Nuclear Research Corporation chooses not to send a notice,,NRC will consider including en article in the quarterly Nuclear Materials Safety and Safeguard newsletter that will explain the potential failure of instrumentation in high radiation fields, particularly after total high integrated dose.
If you would like to dis ss this further, please contact me at (3010 415-7231.
/
Sincerely,
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Larry W. Campsr, Chief j
Materials Safety Branch Division ofIndustrial and l
Medical AuclearSafety l
Distribution: closes imns7134 l
lMNSt/f NRC Central Files Kenn Ramse, GAP l
Public Document Room (yes, per TMT)
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