scholarly journals Using a safety PLC to Implement the Safety Function

2021 ◽  
Vol 6 (1) ◽  
pp. 1072-1078
Author(s):  
Karol Rástočný ◽  
Juraj Ždánsky ◽  
Jozef Hrbček
Keyword(s):  
Safety Function ◽  
Safety Plc

Safety of Two-Channel Connection of Sensors to Safety PLC

2020 ELEKTRO ◽  
2020 ◽  
Author(s):  
Juraj Zdansky ◽  
Karol Rastocny ◽  
Milan Medvedik
Keyword(s):  
Safety Plc

Inservice Inspection of Extended Dry Storage of Spent Nuclear Fuel, Part II: NDE/Sensor Technology Development and Codification

2021 ◽  
Author(s):  
Ryan M. Meyer ◽  
Jeremy Renshaw ◽  
Kenn Hunter ◽  
Mike Orihuela ◽  
Jim Stadler ◽  
...  
Keyword(s):  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Technology Development ◽  
Storage System ◽  
Sensor Technology ◽  
Nondestructive Examination ◽  
Dry Storage ◽  
Safety Function ◽  
Majority Population ◽  
The Usa

Abstract This paper describes development and demonstration of nondestructive examination (NDE) technologies to support periodic examinations of interim dry storage system (DSS) canisters for spent nuclear fuel in the USA to verify continued safe operation and that the canister confinement is intact and performing its intended safety function. Specifically, this work relates to NDE technology development for “canister” based DSS systems, which form the majority population of DSSs in the USA for interim storage of spent nuclear fuel. Consideration of potential degradation of the welded stainless-steel canister in these systems is required for continued usage in the period of extended operation (PEO) beyond the initial license or certified term. Physical access to the canister surface is constrained due to narrow annulus spaces between the canister and the overpack, tortuous entry pathways, and high temperatures and radiation doses that can be damaging to materials and electronics related to inspections. Several activities to demonstrate NDE technologies for the inspections of different DSS systems are summarized.

scholarly journals PLC-Based Safety Instrumented System of a Boiler using HAZOP

2018 ◽  
Vol 3 (1) ◽  
pp. 1-9
Author(s):  
Mahfoud CHAFAI ◽  
Abderrahmane OUADI ◽  
Hamid BENTARZI
Keyword(s):  
Control System ◽  
Pressure Sensors ◽  
Petrochemical Plant ◽  
Input Interface ◽  
Safety Function ◽  
Related Part ◽  
Operational Safety ◽  
Output Module ◽  
Machine Control ◽  
Interface Modules

HAZOP Analysis is used to determine great deviations which will affect the operational safety of a boiler of an existing petrochemical plant that may affect on persons, material and the environment. PLC is proposed to provide the safety function to fit into the overall machine control system as a safety-related part. It reads from the temperature, pressure sensors via its input interface modules and outputs commands in the case of critical deviation via the output module to the final control elements such as actuators allowing an improvement in the safety of the overall boiler system.

Sign in / Sign up

Export Citation Format

Share Document