ENCLOSURE TO DOE/ERSP PROCEDURE NO. 18, FCRR SOP 608-06, 12 October 1977. RADIOACTIVE SOURCE TEST PROCEDURES Reference: None 2. Purpose: To establish serviceability standards and test procedures for radioactive sources, both sealed and unsealed. General: a. All radioactive sources will be given initial leak tests by the possessing organization upon receipt. b. All radioactive sources will be leak tested at intervals of 6 months by the possessing organization. Leak Test Procedures: a. b. Sources containing alpha emitters: 1) Use a Whatman filter paper #1 or equivalent material cut to a 4.25 em diameter circle. 2) Dampen the paper dise with distilled water. 3) Thoroughly wipe all surfaces (except active surfaces) of the radioactive sources 4) Allow the paper to dry with the contact face up. 5) Count the wipe sample using a laboratory proportional counter. 6) Requirement: If 200 or more counts per minute (cpm) are registered, the test source is unserviceable and should be disposed of as unwanted radioactive material. If leakage of a source is indicated, the general area in which the source set was stored or used should be checked for contamination. with the moistened paper. The paper should have sufficient wet strength to prevent it from falling apart when wet. Moderate pressure should be used while wiping the test source. Sources containing beta-gamma emitters: 1) Use a Whatman filter paper #1 or equivalent material cut to a 4.25 em diameter circle. 2) Dampen the paper dise with distilled water. 3) Thoroughly wipe all surfaces (except active surfaces) of the radioactive sources 4) Allow the paper to dry. 5) Wipe test sources showing removable activity of 11,100 dpm (0.005 xei) or more indicate the source is unserviceable and should be disposed of as unwanted radioactive material. with the moistened paper. The paper should have sufficient wet strength to prevent it from falling apart when wet. Moderate pressure should be used while wiping the test source. Using a beta counter, determine the beta-gamma activity on the paper in terms of disintegrations per minute (dpm). A-18-3