Operational safety of nuclear facilities

While safety can not be “proved”, we believe that showing that operations at a nuclear facility are “normal” can be a useful confidence building measure. Several techniques are available:

 
Sharing site radiation measurements

Nuclear facilities have radiation measurement stations around the site with display in a central control area.  Some of this data, especially from exterior areas could be shared. This would complement the data from NEWNET stations.

A typical site radiation monitoring system display, courtesy of Tokyo Electric Power at Fukushima Dai-Ichi site.

Click here or on image to view a full screen display.


Remote Monitoring

Still video images of the facility can show that operations are normal.  Sensors at the facility can trigger the images when movement of people or equipment is detected. Correct camera placement does not need to reveal security information.

Video image obtained at the CMC from an Australian spent fuel storage area.  This demonstration is part of testing of remote monitoring for IAEA Safeguards.  The generic nuclear energy transparency experiment can use the same technology, but in less intrusive configurations.

click button to view video images of a remotely monitored inspection

 

WippYucca Mtn

Technologies used in this test were:

  • Door switches to indicate entry
  • Fiber optic seals on the cask lids in the floor to detect access to casks
  • Motion detectors on the cask lids to detect cast movement
  • Microwave sensors to detect motion in the room
  • Computer to receive signal from the sensors
    In this case the control computer stored images for access by telephone modem links.  More modern systems use the Internet for higher data transmission rates.
    The link below shows a few images captured during a routine inspection of the facility.  The viewer can see that the images were triggered by personnel motion, not by motion of the casks themselves.

Sharing basic operational data

Some basic information like total power, coolant temperature or pressure can show that operation is normal.  The display should explain what normal values are and include “comment” information to make it useful.  Comments would briefly explain differences between normal and actual values - information like”shut down for refueling”.

In Japan, power companies send some basic operational data to the local city hall, prefectural offices or an environmental center.  The purpose is to establish public understanding and trust.  The image shows a display at the Fukui Prefecture Nuclear Power Plant Environmental Radiation Research and Monitoring Center.   Facilities operated by Kansai Electric Power, Japan Nuclear Cycle Development Institute, and Japan Atomic Power transmit electrical output, water discharge radiation, and meteorological readings to this viewing station.

Click here or on image to view a full screen display.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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