Richard,
You are correct. The Three Mile Nuclear Plant melt down disaster is an example of alarm versus interlock problems. Moreover, the three-mile scenario included a serious interlock initiation that was overridden by the Senior Reactor Operator (Shift Supervisor) on shift.
The same scenario repeated itself I years later at the Christal River Plant and operations did not override the emergency automatic functions. This resulted in a very minor inconvenience and restart later.
Jim Keating
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU> On Behalf Of Richard Palluzi
Sent: Sunday, January 23, 2022 8:01 AM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: [DCHAS-L] Article
Some of the membership may be interested in my latest article:
Alarms versus Automatic Interlocks in Research Units
https://www.linkedin.com/pulse/alarms-versus-automatic-interlocks-research-units-richard-palluzi
Richard Palluzi
PE, CSP,FAIChE
Pilot plant and laboratory consulting, safety, design, reviews, and training
www.linkedin.com/in/richardppalluzillc/
Richard P Palluzi LLC
72 Summit Drive
Basking Ridge, NJ 07920
rpalluzi**At_Symbol_Here**verizon.net
908-285-3782
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