Services 2017-08-31T17:58:42+00:00

Fire Protection

ARS is a leader in the commercial nuclear power fire protection industry.  Our staff has experience as fire protection program owners at various nuclear plants and nuclear fleets.  This background, combined with operations experience, allows ARS to draw from a diversified set of skills to address our clients’ unique needs, addressing every aspect of the fire protection and safety process.  The ARS staff also has extensive experience in government nuclear and non-nuclear facilities as well as the Highly Protected Risk (HPR) class of industrial facilities.

Appendix R

Appendix R was written as an addition to Code of Federal Regulations (CFR) 50.48, and it details the requirements to be able to perform safe shutdown in the event of a fire and to mitigate release of radiation to the public.   ARS works closely with power plants to find cost-effective solutions to meeting those regulations.

The engineers and operators at ARS are well-versed in the codes and regulations set forth in Appendix R and can help plants modify outdated designs and procedures in order to be in compliance with Nuclear Regulatory Guidelines.

In accordance with the Appendix R to Part 50, ARS identifies and evaluates the following:

  • Fire Protection Program, including defense in depth fire protection
  • Fire Hazards Analysis
  • Fire Prevention Features
  • Safe Shutdown Capability
  • Fire Brigade Training and Practice
  • Emergency Lighting and Administrative Controls
  • Fire Strategies
  • Alternative and Dedicated Shutdown Capability
  • Fire Barrier Cable Penetration Seal Qualification and Fire Doors
  • Oil Collection System for Reactor Coolant Pump

In addition, ARS engineers will recommend any other modifications or general design requirements to meet the prescriptive requirements of Appendix R.

NFPA 805

The National Fire Protection Association (NFPA) approved NFPA Standard 805, “Performance-Based Standard for Fire Protection for Light-Water Reactor Electric Generating Plants, 2001 Edition” (NFPA 805) on January 13, 2001.  This alternate fire protection rule [10 CFR 50.48(c)] describes a new, risk-informed, performance-based standard for existing light-water nuclear power plants and introduces a more objective, data-driven method of making U.S. nuclear power plants safer.  The NRC has modified its fire protection regulations to allow licensees to transition voluntarily to NFPA 805 in lieu of their existing fire protection licensing basis.

Fire Modeling

When determining how best to prevent, mitigate, and suppress a fire, engineers must first understand how a fire would behave in a particular space.  As part of the fire protection services provided, ARS uses a variety of programs to determine every potential behavior of any fire and how each variable within a space would impact that behavior.


The uniquely qualified staff at ARS has a range of skills and experience to perform every aspect of fire protection and safety.  When working with a client to bring a plant into compliance, ARS uses a variety of methods to determine the best way to prevent and control hazardous situations, including fire risk analysis, fire protection separation, electrical separation, code compliance, and compartment analysis.


In the event of a fire at a nuclear power plant, the ability to shut down a plant safely is paramount. The ARS electrical engineering team has the skills and experience to perform detailed analyses of plant diagrams to determine how electrical circuits controlling safe shutdown equipment may be affected. Through studying plant drawings, cable routing diagrams, and circuit diagrams, ARS electrical engineers are able to create a plan in which equipment necessary to shut the plant down safely remains usable, even in the event of a fire.


In the commercial nuclear power industry, licensing refers to the process of gaining government approval for operation of a plant.  Part of this process includes demonstrating the ability to contain a fire and shut down the station safely.  This ensures that risks due to fires in nuclear plants, such as the Brown’s Ferry disaster in 1975, are greatly reduced.  Under current NRC licensing guidelines, all plants must include measures to detect, contain, mitigate, and suppress any fire in the plant.  The experienced fire protection engineers and licensing engineers at ARS have the skills and the knowledge to assist any plant with the expertise necessary to comply with government regulations.


ARS provides qualified fire protection engineers when clients need to perform audits and assessments for annual, triennial and special self-assessments.  The experienced staff at ARS has a thorough understanding of all aspects of plant operations and regulatory standards.  Based on information provided by governing bodies, ARS advises clients on what to include in documentation to the local governing bodies.

ARS is a global company with operations throughout the world.  The company is adept at working within regulations and coordinating with various national regulatory agencies.