[Code of Federal Regulations]
[Title 10, Volume 1]
[Revised as of January 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 10CFR34.25]

[Page 552-553]
 
                            TITLE 10--ENERGY
 
                CHAPTER I--NUCLEAR REGULATORY COMMISSION
 
PART 34--LICENSES FOR INDUSTRIAL RADIOGRAPHY AND RADIATION SAFETY 
REQUIREMENTS FOR INDUSTRIAL RADIOGRAPHIC OPERATIONS--Table of 
Contents
 
                          Subpart C--Equipment
 
Sec. 34.25  Radiation survey instruments.

    (a) The licensee shall keep sufficient calibrated and operable 
radiation survey instruments at each location where radioactive material 
is present to make the radiation surveys required by this part and by 10 
CFR part 20 of this chapter. Instrumentation required by this section 
must be capable of measuring a range from 0.02 millisieverts (2 
millirems) per hour through 0.01 sievert (1 rem) per hour.
    (b) The licensee shall have each radiation survey instrument 
required under paragraph (a) of this section calibrated--
    (1) At intervals not to exceed 6 months and after instrument 
servicing, except for battery changes;
    (2) For linear scale instruments, at two points located 
approximately one-third and two-thirds of full-scale on

[[Page 553]]

each scale; for logarithmic scale instruments, at mid-range of each 
decade, and at two points of at least one decade; and for digital 
instruments, at 3 points between 0.02 and 10 millisieverts (2 and 1000 
millirems) per hour; and
    (3) So that an accuracy within plus or minus 20 percent of the 
calibration source can be demonstrated at each point checked.
    (c) The licensee shall maintain records of the results of the 
instrument calibrations in accordance with Sec. 34.65.