Since when are employees not civilians? Many of those nuclear power plants are not military run.
Additionally there are plenty of examples on that page of radioactive material released into the environment.
From the 1980s alone, and _not even counting_ Chernobyl:
February 11, 1981 – A new worker inadvertently opens a valve and more than 110,000 US gallons (420 m³) of radioactive coolant liquid leaks into the containment building of the Tennessee Valley Authority Sequoyah 1 nuclear power plant in rural Tennessee. Eight workers are contaminated with radiation.
April 25, 1981 – More than 100 workers are exposed to radiation during repairs of a nuclear power plant in Tsuruga, Japan.
June 1981 – a 3,000 US gallon (11 m³) leak of radioactive water occurs at the Salem Nuclear 2 reactor in Salem, New Jersey.
February 1982 – A 3,000 US gallon (11 m³) leak of mildly radioactive water contaminates 16 workers at a nuclear power plant in Salem, New Jersey.
August 1983 – 3,700 liters of tritium contaminated heavy water leaks into Lake Huron and Lake Ontario from Canadian nuclear power stations.
January 6, 1986 – At the Kerr-McGee nuclear fuel reprocessing plant in Gore, Oklahoma, a cylinder of nuclear material bursts after being improperly heated. One worker dies, 100 are hospitalized.
1986 – The US Government declassifies 19,000 pages of documents indicating that between 1946 and 1986, the Hanford Site in Richland, Washington released thousands of US gallons (several m³) of radioactive liquids. Of 270,000 people living in the affected area, most received low doses of radiation from iodine.
And a few selected incidents:
December 12, 1952 – The first serious nuclear disaster occurred at the NRX reactor in Chalk River, Canada. A massive power excursion destroyed the core, resulting in a partial meltdown. A series of hydrogen gas explosions threw a four-ton gasholder dome four feet (1.2 m) into the air, where it jammed in the superstructure. Thousands of curies (several terabecquerels) of fission products were released into the atmosphere, and a million US gallons (3,800 m³) of radioactively contaminated water was pumped out of the basement into shallow trenches not far from the Ottawa River. The core was buried. Jimmy Carter, then a nuclear engineer in the US Navy, was among the cleanup crew.
October 8–12, 1957 – Windscale Pile No. 1 at Sellafield north of Liverpool, England began an annealing process to release Wigner energy from graphite portions of the reactor. The reactor that burned was one of two air-cooled graphite-moderated natural uranium reactors at the site used for production of plutonium. Technicians mistakenly overheated the reactor pile because poorly placed temperature sensors indicated the reactor was cooling rather than heating, leading to failure of a nuclear cartridge, which allowed uranium and irradiated graphite to react with air. The nuclear fire burned four days, melting and consuming a significant portion of the reactor core. About 150 burning fuel cells could not be lifted from the reactor core, but operators succeeded in creating a fire break by removing nearby fuel cells. A risky effort to cool the graphite core with water eventually quenched the fire. The air-cooled reactor had spewed radioactive gases throughout the surrounding countryside. Milk distribution was banned in a 200 mile² (520 km²) area around the reactor. Over the following years, Pile No. 1 and neighboring Pile No. 2 were shut down, although nuclear decommission work resumed in 1990 and continued at least through 1999. The incident, similar in scale to the Three Mile Island meltdown, was later blamed for dozens of cancer deaths.[22] (
http://www.nucleartourist.com/events/windscal.htm)[23] (
http://www.lakestay.co.uk/1957.htm)[24] (
http://www.british-energy.com/media/factfiles/mn_item57.html)[25] (http://www.bellona.no/en/energy/nuclear/sellafield/wp_5-2001/21663.html )
November 19, 1971 – At a nuclear power plant operated by Northern States Power Company in Monticello, Minnesota, a water storage facility overflows, releasing 50,000 US gallons (190 m³) of radioactive waste water into the Mississippi River. Some radioactive substances later enter the downstream St. Paul water system.
March 1972 – Senator Mike Gravel of Alaska submits information to the Congressional Record indicating that a routine check of a nuclear power plant showed radioactivity in the building's water—including the plant drinking fountain—which had been cross-connected with a 3,000 US gallon (11 m³) tank of radioactive water.
May 28, 1974 – The Atomic Energy Commission reports that 12 "abnormal events" in 1973 released radioactivity "above permissible levels" at nuclear power plants.
September 29, 1979 – Governor Bruce Babbitt of Arizona orders the National Guard to clean up American Atomics' Tucson plant, which he believes has been leaking. (Reports of problems by the Arizona Atomic Energy Commission had been stalled by a commissioner, who was also a vice-president of American Atomics.) At the kitchen for the public school system across the street from the plant, $300,000 of food is found contaminated by radioactive tritium; chocolate cake had 56 nCi/L, 2½ times the "safe" standard. A nuclear official accuses Babbitt of "greed for publicity."[37] (
http://prop1.org/2000/accident/facts4.htm)[38] (
http://www.ratical.org/radiation/KillingOurOwn/KOO10.html)
August 9, 2004 – An accident in the nuclear power plant of Mihama, in the Fukui prefecture 320 km northwest of Tokyo causes five deaths and seven injuries becoming the deadliest nuclear power plant accident in Japan. The cause of the accident was a leak of non-radioactive steam in the reactor number 3 building. The power plant's operator recognized a defect of control procedures in its installations. The broken pipe did not meet the security norms. Local authorities announced that no radioactive leaks occurred outside of the building.
So both you and Russ are in factual error; there have been many nuclear power plant accidents besides Chernobyl that harmed civilians, both civilian employees and civilian non-employees.