105 CMR, § 120.333 - Radiation Surveys and Survey Records

(A) No radiographic operation shall be conducted unless at least one calibrated and operable radiation survey meter, as described in 105 CMR 120.314, is available and used at each site where radiographic exposures are made.

(B) A survey with a radiation survey instrument shall be made after each radiographic exposure to determine that the sealed source has been returned to its shielded position. The entire circumference of the radiographic exposure device, including the source guide tube and collimator if provided, shall be surveyed.

(C) A survey shall be made of the storage area as defined in 105 CMR 120.302 whenever a radiographic exposure device is being placed in storage.

(D) A physical radiation survey shall be made after each radiographic exposure using radiation machines to determine that the machine is "off."

(E)

(1) All potential radiation areas in which industrial radiographic operations are to be performed shall be posted in accordance with 105 CMR 120.332, based on calculated dose rates, before industrial radiographic operations begin. An area survey shall be performed during the first radiographic exposure (i.e., with the sealed source in the exposed position) to confirm that 105 CMR 120.332 requirements have been met and that unrestricted areas do not have radiation levels in excess of the limits specified in 105 CMR 120.221(A). Surveys to confirm the extent of the High Radiation Area, one mSv/hr (100 mr/hr), within the Radiation Area should not be undertaken.

(2) Each time the exposure device is relocated and/or the exposed position of the sealed source is changed, the requirements of 105 CMR 120.333(E)(1) shall be met.

(3) The requirements of 105 CMR 120.333(E)(2) do not apply to pipeline industrial radiographic operations when the conditions of exposure including, but not limited to, the radiographic exposure device, duration of exposure, source strength, pipe size, and pipe thickness remain constant.

(F) A survey with a radiation survey instrument shall be made to determine that the sealed source has been returned to its shielded position any time a radiographic exposure device is placed in storage. The entire circumference of the radiographic exposure device, including the source guide tube and collimator if provided, shall be surveyed.

(G) If a vehicle is to be used for storage of radioactive material, a vehicle survey shall be performed after securing radioactive material in the vehicle and before transport to ensure that radiation levels do not exceed the limits specified in 105 CMR 120.221(A) at the exterior surface of the vehicle.

(H) Surveys shall be performed on storage containers to ensure that radiation levels do not exceed the limits specified in 105 CMR 120.221(A). These surveys shall be performed initially with the maximum amount of radioactive material present in the storage location and thereafter at the time of the quarterly inventory and whenever storage conditions change.

(I) A survey meeting the requirements of 105 CMR 120.333(F) shall be performed on the radiographic exposure device and the source changer after every sealed source exchange.

(J) Records shall be kept of the surveys required by 105 CMR 120.333(E), (F), (G), (H), (I) and 105 CMR 120.318(A). These records shall be maintained for Agency inspection for five years after completion of the survey. If a survey was used to determine an individual's exposure due to loss of personnel monitoring data, the records of the survey shall be maintained until the Agency authorizes disposal.

Notes

105 CMR, § 120.333