Patent Document ID: 20100100251
Application ID: 12253219
Patent Flag: 0

Claim One:
1. The establishment method for the fault tree for a nuclear power plant with advanced boiling water reactor includes the following procedures: i) Analyze signal source for equipment operation, including manual and automatic operation signals for single and multiple equipments; ii) Build process flow diagram for operation signals, in which water-level, temperature and pressure detection units can generate automatic operation signals, while various mechanical signal generation units and video signal generation unit can generate manual signals; iii) Split operation signals source, wherein the operation signals including (1) all automatic operation signal flow processes provided by water-level, temperature and pressure detection units, (2) all manual operation signal flow processes provided by mechanical signal generation unit, (3) all manual operation signal flow processes provided by touch screen video signal generation unit; iv) Select and revise standard fault tree, so the common instrument control units shared by different signal sources shall use the same basic event name in different standard fault tree; v) Link standard fault tree, so for specific equipment in the system, making selection on the operation signal flow process for all signal sources that can operate the specific equipment and then linking all the corresponding standard fault trees into the fault tree for the specific equipment.