Measurement of Leakage Tritium from Tritium Self-luminous Paints

Abstract

The study has been made in order to establish the measurement of the leakage tritium from the tritium self luminous paints made in England, U.S.A., Germany and Japan. The amount of tritium contained in a painted sample was about 25mCi, the amount which is necessary for a clock or an alarm clock to get enough luminosity , and the measurement of the leakage tritium were made by the flow method using a gas flow counter. The results obtained show that the amount of the leakage tritium depends only upon the initial amount of tritium applied, neither upon the kind of paints nor upon the specific activities of the tritium in paints. The security of the commercial tritium self luminous paints has been examined in connection with the maximum permissible amount of tritium.

Examination of the Feasibility for Demonstration and Use of Radioluminescent Lights for Alaskan Remote Runway Lighting

“…The lights were deployed as depicted on page 5-10 MACR 55-130 (Incl #4) minus the red lights to mark the end of the runvay. 4. Testing at Mackall confirmed ·that increasing the nwnber of tubes does increase the acquisition distance of the lights.…”

“…Again, it is not possible at this time to estimate these factors before we have gained some field experience in a user environment. 4.3 PRELIMINARY LCC ANALYSIS AND COST·BENEfiT CALCULATIONS COMPARING CONVENTIONAL SYSTEMS 4. 3.1 …”

“…4. Aircraft will be scheduled to tly during a specific time block during each test veriod on the days of 19-22 Nov 83.…”

“…Thus, a pilot could acquire the light from a distance of 6 or mote miles rather than 2 miles acquisition identified during the 1982-83 test in Alaska. 4. Designs of large-scale systems that use these lights are still in early development for runway lighting and mrl<ing; thus, as we better understand the human factors affecting the lights and their use under varying weather conditions, substantial improvements in this area can be expected.…”

Estimated radiation dose from timepieces containing tritium

“…These studies were initiated at the request of the Nuclear Regulatory Commission (NRC), for the purpose of identifying consumer products that pose a potential for unnecessary radiation exposure to the general public and of identifying products about which sufficient information is not available to estimate radiation exposures. Because tritium readily exchanges with hydrogen atoms present in the atmosphere and in most materials with which it has contact, leakage of this isotope from timepieces can occur (5,6).…”