§ 17-30313. Special Requirements for X-Ray Therapy Equipment Operated at Potentials of 50 kv and Below.

(a) Equipment.

(1) All provisions of Section 30312(a) apply.

(2) A therapeutic-type protective tube housing shall be used. Contact therapy machines shall meet the additional requirement that the leakage radiation at 2 inches from the surface of the housing not exceed 0.1 R/hr.

(3) Automatic timers shall be provided which will permit accurate presetting and determination of exposures as short as one second.

(b) Operating Procedures.

(1) All provisions of Section 30312(b) apply except 30312(b)(1) and 30312(b)(7).

(2) In the therapeutic application of apparatus constructed with beryllium or other low-filtration windows adequate shielding shall be required to protect against unnecessary exposure from the useful beam, and special safeguards are essential to avoid accidental exposures to the useful beam. There shall be on the control panel some easily discernible device which will give positive information as to whether or not the tube is energized.

(3) Machines having an output of more than 1,000 roentgens per minute at any accessible place shall not be left unattended without the power being shut off at the primary disconnecting source.

(4) If the X-ray tube of a contact therapy machine is hand-held during irradiation, the operator shall wear protective gloves and apron.

HISTORY

1. Amendment filed 3-5-71; effective thirtieth day thereafter. Approved by State Building Standards Commission 2-26-71 (Register 71, No. 10).

2. Renumbering and amendment filed 9-4-73 as an emergency; effective upon filing (Register 73, No. 36). Approved by State Building Standards Commission 11-30-73.

3. Certificate of Compliance filed 12-28-73 (Register 73, No. 52).

4. Amendment of subsections (a)(1), (b)(1) and (b)(4) filed 6-18-87; operative 7-18-87 (Register 87, No. 28).

5. Change without regulatory effect amending subsection (b)(3) filed 11-1-91 pursuant to section 100, title 1, California Code of Regulations (Register 92, No. 5).

6. Amendment of section heading filed 3-3-94 as an emergency; operative 3-3-94 (Register 94, No. 9). A Certificate of Compliance must be transmitted to OAL by 7-1-94 or emergency language will be repealed by operation of law on the following day.

7. Certificate of Compliance as to 3-3-94 order transmitted to OAL 6-7-94 and filed 7-14-94 (Register 94, No. 28).

Note

Note: Authority cited: Sections 208 and 25811, Health and Safety Code. Reference: Sections 25801, 25802, 25811 and 25815, Health and Safety Code.