LEAKAGE TESTS ON A CONTAINMENT SYSTEM FOR A SOLUTION CONTAINING MOL YBDENUM-99

According to the 1979 edition of the IAEA Regulations, the calculated Type B(U) permissible leakage for the particular molybdenum-99 liquid solution discussed here is 8.85 X 1 o-7 mL. h -• and 8.85 X I 0-.. mL in one week for normal and accident transport conditions, respectively. In order to demonstrate compliance with containment requirements, the methods specified in ANSI N 14.5 to establish leakage test procedures for containment system design, fabrication, assembly and periodic verification were used. However, the authors developed a unique procedure for measuring solution leakage during and after the thermal test. The paper discusses how the permissible leakage values and the procedures used to demonstrate compliance were established.