| Popis: |
Radiological protection measurements made during the D-T pulses indicated that the biological shield was challenged by a neutron flux ≡ 125 mSv/pulse and γ-radiation ≡ 8 mSv/pulse. Despite this, radiation levels outside of the shield were, generally, indistinguishable from natural background. Neutron activation of the JET machine produced enhanced γ-radiation levels within the Torus Hall (1 mSv/h : 2 hours after shutdown). The radiological protection implications for a protracted D-T phase are reviewed. The experiment was expected to have a number of personnel safety implications for the shutdown due to start three months later, the effects were generally lower than expected. A comprehensive system of tritium monitoring equipment was installed to measure tritium discharges to atmosphere and environmental airborne tritium during the First Tritium Experiment. |
