Abstract: To promote the safety standards and operation management in Xi'an pulsed reactor, the construction of a system of safety goals and its quantitative value were put forward and analyzed on the basis of the result of probabilistic safety assessment (PSA), with considering of the characteristic of XAPR's defense in-depth and its operational safety level. The results demonstrated that XAPR safety goals should be supplemented with objectives of probability quantitative and radiation protection dose constraints. Safety goals were proposed including core damage frequency of less than 1×10^-5 per reactor year, and small release frequency of less than 1×10^-7 per reactor year; public dose of less than 0.1 mSv·a^-1, and occupational dose of less than 2 mSv·a^-1 in normal conditions. In accident conditious however, further work about the protection goals is expected.

Key words: Xi'an pulsed reactor, safety objective, measurable safety goal, research reactor