There are three ANSI standards that can be used to test sirens: ANSI S12.14, Methods for the Field Measurement of the Sound Output of Audible Public Warning Devices Installed at Fixed Locations Outdoors. This is what ASC used to test the T-128. This is a Tronka & Associates test report dated 199...

Yes, they were located on what was the Crucible Steel property in Midland PA.

The population requirement listed above is in Section 651 of EPAct 2005 - it was inserted by then Senator Hillary Clinton. There is only one US NPP that meets that criterion - Indian Point. They installed 172 ATI HPSS32 electronic sirens along with an extremely complex control system that uses both ...

Exelon is a combination of Commonwealth Edison in IL and PECO in PA. They use a boat-load of T-bolts around Limerick Generating Station in PA near Pottstown - about 160 of them (soon to be replaced with T-128's). They also use about another 90 of them or so around Peach Bottom (also soon to be repla...

It is a "cats and dogs" system - The last count I had was 28 2001's - however, these are mainly add-ons for areas that have previously not had siren coverage. In some cases, the Allertors are being replaced by 2001's due to age-related problems. It is a trend that is likely to continue. Ho...

They use four 100-watt speaker-drivers in an X-array that go into a common plenum and that goes straight out into the fluted horn. So the sound waves "bash together" (they better be perfectly aligned and at precisely the same frequency to assure no active sound cancellation), then the wave...

Guys, they had literally just installed the siren and were doing the initial commissioning test and 24 seconds later - poof! It wasn't the motor - as was noted by someone above.

Monticello had 97 sirens, with plans to add a few more. Prairie Island had 108 sirens, with plans to add 3 more. They are all Federal 2001's; with the single exception of the above-mentioned Modulator in front of the casino. The Modulator will "stutter" at the site area emergency level to ...

They are all T-128's.

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