Operational Reactor Safeguard Examination
An Operational Reactor Safeguard Examination (ORSE) is an examination conducted by United States Navy personnel on board U.S. Navy nuclear-powered ships. The purpose of an ORSE is to ensure that the Engineering (submarines) or Reactor (aircraft carriers) department of a nuclear-powered vessel is operating their reactor(s) in a safe manner. The exam also ensures the readiness of the engineering department to safely respond to nuclear power plant casualties.
The ORSE board is made up of three Junior Board Members, usually prior Engineers, and a Senior Board Member (a prior Commanding Officer) Nuclear Propulsion Examining Board, or NPEB.
Typical Schedule
An ORSE is scheduled during an underway period. There are a few surprise ORSE's when the boat or ship is given only a few days of notice. The first task an ORSE board is to review all of the ship's records from the date of the most recent ORSE. During the review of records, the engineering department takes a written exam. After the review, a battery of intense simulation drills will begin. On submarines, each of the 3 watch sections stands one drill watch, is casualty assistance team for another and finally drill monitors for a third. After the drills, oral interviews test the department's level of knowledge. Additionally, there are monitored evolutions to evaluate the department's ability to perform selected maintenance items. A typical ORSE lasts for 3 days.
Purpose
The purpose of ORSE is to ensure that a ship's engineering or reactor department can respond to any casualty, and is properly following all procedures for operating and maintaining the propulsion plant.