ML20031B048
| ML20031B048 | |
| Person / Time | |
|---|---|
| Site: | 07000556 |
| Issue date: | 09/21/1981 |
| From: | Sreniawski D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Ferguson E AIR FORCE, DEPT. OF |
| References | |
| NUDOCS 8109280529 | |
| Download: ML20031B048 (2) | |
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Dept. of the Air Force License No. 34-00412-02{ c
- Wright Patterson Air Force Base License No. 34-00472-05 ATTN: Col. E. B. Ferguson License No. 34-04682 USAF Medical Center /SG Licente No. 34-04682-02 Wright Patterson Air License No. SNM-513 Force Base, OH 45433 Gentlemen:
This refers to the routine safety inspection conducted by Dr. W. J. Adam of this office on September 2-3, 1981, of activities suthorized by NRC Byproduct Material Licenses No. 34-00472-02, No. 34-00472-05, No. 34-04682-01, No. 34-04682-02 and Special Nuclear Material License No. SNM-513 and to the discussion of our findings with Col. Strayer and others of your staff at the conclusion of the inspection.
The inspection was an examination of activities conducted under your license as they relate to radiation safety and to compliance with the Consoission's 1
rules and regulations and with the conditions of your license. The inspec-tion consisted of a selective examination of procedures and representative records, observations, independent measurements, and interviews with personnel.
This inspection also included a measurement of the output of your teletherapy equipment. Our measurement was made using a Victoreen Model 570 Condenser R-Meter with Model 621 chamber, calibrated by the Victoreen Instrument Company. The source-to-chamber distance was 80 centimeters and the field size used was 10 by 10 centimeters. After applying standard correction factors for temperature, pressure, attenuation, inverse square, backscatter, timer error, and roentgen-to-rad conversion, our measurement of the output of your teletherapy equipment was 88.9 rads per minute at the point of maximum buildup in a muscle mini phantom. The most recent monthly spot check of your teletherapy equipment, conducted on August 31, 1981, reported a measured output for the same exposure parameters of 91.3 rads per minute. Applying a-correction factor to account for 3 days decay, the ggo7 e
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Dept. of the Air Force 21130I value calculated from the-August 31, 1981 spot. check becomes 91.2 rads per minute.
Based on the close agreement in measured output values, we feel the actual' output of your teletherapy equipment to be within established guidelines of 5 percent.
No items of noncompliance with NRC requirements were identified during the course of this inspection.
We will gladly discuss any questions you have concerning this inspection.
Sincerely, S-3et D. J. Sreniawski, Chief Materials Radiatica Protection Section 2 cc:
Col. Peterson DMB/ Document Control Desk (RIDS) 1 E
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