[Code of Federal Regulations]
[Title 10, Volume 1]
[Revised as of January 1, 2005]
From the U.S. Government Printing Office via GPO Access
[CITE: 10CFR35.61]

[Page 575-576]
 
                            TITLE 10--ENERGY
 
                CHAPTER I--NUCLEAR REGULATORY COMMISSION
 
PART 35_MEDICAL USE OF BYPRODUCT MATERIAL--Table of Contents
 
                Subpart C_General Technical Requirements
 
Sec. 35.61  Calibration of survey instruments.

    (a) A licensee shall calibrate the survey instruments used to show 
compliance with this part and 10 CFR Part 20 before first use, annually, 
and following a repair that affects the calibration. A licensee shall--
    (1) Calibrate all scales with readings up to 10 mSv (1000 mrem) per 
hour with a radiation source;
    (2) Calibrate two separated readings on each scale or decade that 
will be used to show compliance; and
    (3) Conspicuously note on the instrument the date of calibration.
    (b) A licensee may not use survey instruments if the difference 
between the

[[Page 576]]

indicated exposure rate and the calculated exposure rate is more than 20 
percent.
    (c) A licensee shall retain a record of each survey instrument 
calibration in accordance with Sec. 35.2061.