Development of EQ Profile for Hydrogen Monitors with Consideration of Operator Actions

PARs are located inside the containment building to reduce the hydrogen concentration, while hydrogen monitors are generally located in mild environmental area. However, the hydrogen monitors in Hanul 1&2 have been decided to locate in harsh area of the auxiliary building, which require the equipment qualification (EQ) of the hydrogen monitors. With the original EQ profile, the hydrogen monitors could not be qualified by suppliers. For the qualification the hydrogen monitors to be located in the auxiliary building of Hanul 1&2, the pressure and temperature analysis has been performed by assuming the CVCS letdown line break. The mass and energy release data was optimized and operator action was considered to stop the M/E release by isolating the broken piping. As a result, the new EQ profile was created. Therefore, the EQ profile developed in this study can be used as the environmental test condition of the newly installed hydrogen monitors.