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  2. Trapped-key interlocking - Wikipedia

    en.wikipedia.org/wiki/Trapped-key_interlocking

    The key will then remain trapped until the gate or door is closed. A personnel or safety key can be released from the access lock, this ensures that the gate or door can not be closed and the initial key released until this personnel or safety key is returned (assuming that no duplicate keys are available). This provides increased operator safety.

  3. Keycard lock - Wikipedia

    en.wikipedia.org/wiki/Keycard_lock

    There were 32 positions for possible hole locations, giving approximately 4.3 billion different keys. The key could easily be changed for each new guest by inserting a new key template in the lock that matched the new key. [2] In the early 1980s, the key card lock was electrified with LEDs that detected the holes. A keycard with a magnetic stripe

  4. Physical security - Wikipedia

    en.wikipedia.org/wiki/Physical_security

    Physical security systems for protected facilities can be intended to: [2] [3] [4] deter potential intruders (e.g. warning signs, security lighting); detect intrusions, and identify, monitor and record intruders (e.g. security alarms, access control and CCTV systems);

  5. Power plant engineering - Wikipedia

    en.wikipedia.org/wiki/Power_plant_engineering

    Cooling tower Nuclear power plant. Power plant engineering, abbreviated as TPTL, is a branch of the field of energy engineering, and is defined as the engineering and technology required for the production of an electric power station. [1] Technique is focused on power generation for industry and community, not just for household electricity ...

  6. Hatfield's Ferry Power Station - Wikipedia

    en.wikipedia.org/wiki/Hatfield's_Ferry_Power_Station

    In the mid-1990s, Allegheny Energy installed a control system which reduced the plant's nitrogen oxide (NO x) emissions. In 2001, Hatfield's Ferry added a natural gas reburn system. [ 2 ] In that same year, Allegheny Energy introduced a passive treatment system where groundwater from the fly ash landfill is treated with wetlands. [ 4 ]

  7. Driver rammed through security fence at S.C. nuclear plant ...

    www.aol.com/news/police-searching-suspect-drove...

    Authorities are searching for a man who drove through the gate of a nuclear power plant in Oconee County, South Carolina, and allegedly attempted to hit security officers at the facility on ...

  8. Lockport Powerhouse - Wikipedia

    en.wikipedia.org/wiki/Lockport_Powerhouse

    The powerhouse was also the home of the waste gate controls. The lock and gates were designed to manage a 40-foot (12 m) drop in canal elevation between the two municipalities. [3] A second phase of construction occurred from 1922 to 1933 to handle differing water loads following the opening of the Ohio River Standard Navigation Lock.

  9. Gate - Wikipedia

    en.wikipedia.org/wiki/Gate

    Gate from Bucharest (Romania) Art Nouveau gate of Castel Béranger (Paris) Candi bentar, a typical Indonesian gate that is often found on the islands of Java and Bali. A gate or gateway is a point of entry to or from a space enclosed by walls. The word derived from old Norse "gat" [1] meaning road or path; But other terms include yett and port.