Nuclear Power Safety
If you are looking for experience with safety analysis of:
- Control Systems,
- Shutdown Systems, or
- Fuel-Handling Systems
look no further. HCRQ has a substantial amount of expertise in these areas.
One Of Our Nuclear Power ContractsSoftware Hazard Analysis Procedure
This procedure was one of a family of standards and procedures defining the engineering requirements for different classes of real-time software distinguished by complexity of system, source of supply and criticality of application.
This procedure was written to conform to and complement the standard for software engineering of safety-critical software.
The standard and its associated procedures are intended to ensure that reliability objectives are met by safety-critical software.
Another Nuclear Power ContractShutdown System Software Analysis
PFT analysis represents the code and the software design specification in a very thorough fashion.
Tables are constructed for each software module describing output variables in terms of input variables and constants for each possible module operating mode.
These tables are then linked, thus permitting the description of system outputs in terms of system inputs.
This result is then compared against a tabular interpretation of the software design specification.
Disagreements between the two are then analyzed.
We were also a major contributor with respect to establishing the rules for PFT analysis.
This work resulted in a published paper.
Another Nuclear Power ContractFuel-Handling Software Safety Analysis
The brakes, which prevent bridge motion while holding the fueling machine, were accidentally released while the fueling machine was clamped onto a fuel channel end-fitting.
The fueling machine dropped a distance of 40 cm. badly damaging the end-fitting. The heavy water leak (initially 1400 kg/h) dropped to 18 kg/h when the heat transport system was de-pressurized.
The incident was traced back to a software error which was introduced into one of the protective computer systems approximately four years previous.
Due to previous contract work with post-accident safety analyses, we were called in to perform a safety analysis of this software.
This work resulted in a published paper "Fault Tree Analysis Of Software At Ontario Hydro" coauthored by HCRQ's director of consulting.
Another Nuclear Power ContractIndication System
Our client was interested in performing a safety analysis of this system.
We quickly advised them that, due to the way their system was designed, a safety analysis was impossible.
The indication system had to be redesigned.
They regretted not contacting us earlier.
Another Nuclear Power InvolvementTraining
NUCLEAR POWER GENERATION: SAFE IF
- properly designed (including safeguards) by competent people,
- thoroughly analyzed by expert system safety and software safety engineers,
- thoroughly tested by competent people,
- systems are properly constructed and installed, and
- operated and maintained (systems, hardware, software) by competent people.
Do you need help with:
- IEC 60880?
- IEEE 7-4.3.2?
- IEC 61513?
We are here to help. Contact us.