Regions of the Nuclear Regulatory Commission

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NRC regions and locations of nuclear reactors, 2008
Map of the NRC Regions

The Nuclear Regulatory Commission has divided the US territory into four regions:[1]

Region HQ location reactor NPP sites
Region I[2] King of Prussia, Pennsylvania north-east 26 17
Region II[3] Atlanta, Georgia south-east 33 18
Region III[4] Lisle, Illinois northern mid-west 24 16
Region IV[5] Arlington, Texas southern midwest and west 21 14
Total 104 65


These four regions oversee the operation of 104 power-producing reactors, and 36 non-power-producing reactors. This oversight is done on several levels, for example:

  • Each power-producing reactor site has Resident Inspectors, who monitor day to day operations
  • Numerous special inspection teams, with many different specialties, routinely conduct inspections at each site
  • Whistleblower reports are investigated by the Office of Enforcement, specifically the Allegations branch [6]

Former regions[edit]

The NRC previously had five regions. Region V was headquartered in Walnut Creek, California and was responsible for activities in the seven far-west states: Alaska, Arizona, California, Hawaii, Nevada, Oregon and Washington. The NRC decided in September 1993 to consolidate Regions IV and V into a single Region headquartered in Arlington, Texas.[7] On April 4, 1994, NRC Region V was abolished, and the NRC Region IV office in Arlington, Texas was given expanded responsibilities to include the seven states formerly governed by Region V.[8][9] The former NRC Region V office in Walnut Creek remained open as the redesignated Walnut Creek Field Office, supporting resident inspection activities at power plants in the Pacific states of Washington, Oregon and California[8] until October 1, 1998, when the Walnut Creek Field Office was abolished to further reduce costs.[10][11][12][13]


  1. ^
  2. ^
  3. ^
  4. ^
  5. ^
  6. ^ Allegations
  7. ^ "NRC to restructure regional functions in west; Walnut Creek to be Field Office" (PDF) (Press release). Washington D.C.: Nuclear Regulatory Commission. September 22, 1993. Retrieved December 3, 2014. 
  8. ^ a b "NRC Administrative Letter 94-08: Consolidation of the NRC Region IV and Region V Offices" (PDF) (Letter to "All holders of operating licenses or construction permits for nuclear reactors"). July 13, 1994. Retrieved December 3, 2014. 
  9. ^ "Consolidation of two NRC western Regions effective on April 4" (PDF) (Press release). Washington D.C.: Nuclear Regulatory Commission. March 30, 1994. Retrieved December 3, 2014. 
  10. ^ Callan, L. Joseph (December 18, 1997). "Walnut Creek Field Office (WCFO) Closure Plan" (PDF) (Letter to "The [NRC] Commissioners"). Retrieved December 3, 2014. 
  11. ^ "NRC to close California Field Office in 1998" (PDF) (Press release). Washington D.C.: Nuclear Regulatory Commission. September 5, 1997. Retrieved December 3, 2014. 
  12. ^ "NRC California Field Office to close September 30" (PDF) (Press release). Arlington, Texas: Nuclear Regulatory Commission Region IV. September 23, 1998. Retrieved December 3, 2014. 
  13. ^ "NRC Administrative Letter 98-08: Availability of Revised NRC Form 3, "Notice to Employees" and Closure of NRC Walnut Creek Field Office" (PDF) (Letter to "All NRC licensees"). October 9, 1998. Retrieved December 3, 2014.