[1B01-03] Measurement and Control Systems of Nuclear Reactors

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[1B03] Implementation of Backup System in PWR Digital Reactor Protection System Considering Software Common Cause Failure Countermeasures

*Masafumi Utsumi¹, Osamu Shibuya¹, Hiroshi Shirasawa¹, Kenta Shimizu¹, Tetsuo Saguchi¹ (1. MHI)

Keywords:

digital reactor protection system,software common cause failure

In PWR plants, a diverse backup control system has been installed as a countermeasure against common cause failures of control software used in the digital reactor protection system. Recently, following publication of a technical requirement document by the Atomic Energy Association (ATENA), the system has been improved at all PWR plants.