Nuclear services provide tools, engineering and logistics for the proper monitoring, leak testing, handling and disposal of nuclear materials, instruments and equipment. There are four basic types of nuclear services. Nuclear field services train technicians at nuclear power plants and support these facilities during power outages. Nuclear engineering services perform design, analysis and development activities which help nuclear power plants comply with regulatory requirements from agencies such as the U.S. Nuclear Regulatory Commission (NRC). Nuclear repair and replacement services are authorized to repair or replace parts and controls at nuclear facilities. They can also supervise the installation of instrumentation and provide advice about plant modernization. Nuclear disposal services specialize in the pickup, handling, transportation and disposal of nuclear waste. Other types of nuclear services perform radiation audits, radiation safety officer (RSO) training, nuclear product training, depot repair, leak tests, and technical support.