This standard specifies the technical requirements for the automatic fire alarm system of conventional is ands of nuclear power plants from design, installation and commis ioning to operation and maintenance. It establis es the general principles for fire detection of important equipment such as transformers and generators, and gives the requirements for fire protection equipment related to conventional is ands. General requirements for linkage control, fire communication, and fire emergency broadcasting. This standard applies to automatic fire alarm systems for conventional is ands of pressurized water reactor nuclear power plants. Other heap types can be implemented by reference.