ML19350E649
| ML19350E649 | |
| Person / Time | |
|---|---|
| Issue date: | 06/18/1981 |
| From: | Wieedeman D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Scott H LUTHERAN MEDICAL CENTER, ST. LOUIS, MO |
| References | |
| NUDOCS 8106230399 | |
| Download: ML19350E649 (2) | |
Text
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NUCLEAR REULATilRY COMMISSION o
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799 ROOSEVELT ROAD GLEN ILLYN.1LLINOIS 80137
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JUN 181981 Lutheran Medical Center License No. 24-04010-02 ATTN:
H. Scott, M.D.
Radiotherapy Dept.
2639 Miami Street St. Louis, M0 Gentlemen:
This refers to the routine safety inspection conducted by Dr. W. J. Adam of this office on June 9, 1981, of activities at Lutheran Medical Center authorized by NRC Byproduct Meterial License No. 24-04010-02 and to the discussion of our findings with you 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 Commission's rules and regulations and with the conditions of your license. The inspec-tion consisted of a selective examination of procedures and representative records, obser"ations, independent measurements, and interviews with personnel.
This inspection also included a measurement of the output of your tele-therapy equipment. Our measurement was made using a Victoreen Model 570 Condenser R-Meter wi'.h Model 621 chamber, calibrated by the National Bureau of Standards Laboratory. The source-to-ck mber distance was 80 centimeters and the field size used was 10 by 10 centimeters. After applying standard corrective factors for temperature, pressure, attenua-tion, inverse square, backscatter, timer error, and roentgen-to-rad conversion, our meastrement of the output of your teletherapy equipment was 88.1 rads per minute at the point of maximum buildup in an extended tissue phantom. The monthly spot check of your teletherapy equipment, conducted on April 9, 1981, reported a measured output for the same exposure parameters of 91.7 rads per minute. Applying a correction factor to account for two months decay, the value calculated from the April 9, 1984 spot check becomes 89.7 rads per minute.
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-,ggggg99gy Based on the close agreement in measured output values, we. feel the actual output of your teletherapy equipment to-be within established guidelines of i 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, D. G. Wiedeman, Acting Chief Materials Radiation Protection Section 1 cc: DMB/ Document Control Desk (RIDS)
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