Narrative:

On 11/sun/01 at approximately XA45 hours, I flew over ZZZ airport which I had previously determined to be outside of a temperature restr airspace area near a nuclear power plant. I had been monitoring 121.5, however, I had turned the volume down on communication 2 to monitor CTAF for a nearby airport's traffic. Upon return to YYY airport I was advised to telephone approach control. I spoke to the supervising controller who stated that ZZZ airport was 'in fact' within the temperature restr airspace. The supervisor stated he was providing this information so I would avoid the area by a wider berth in the future. A check of the sectional chart revealed my calculation error. I will exercise greater care in the future. Note: the supervisor stated he would not be taking any further action and nothing further was required from me.

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Original NASA ASRS Text

Title: C172 PLT ENTERED TFR AIRSPACE AROUND A NUCLEAR PLANT.

Narrative: ON 11/SUN/01 AT APPROX XA45 HRS, I FLEW OVER ZZZ ARPT WHICH I HAD PREVIOUSLY DETERMINED TO BE OUTSIDE OF A TEMP RESTR AIRSPACE AREA NEAR A NUCLEAR PWR PLANT. I HAD BEEN MONITORING 121.5, HOWEVER, I HAD TURNED THE VOLUME DOWN ON COM 2 TO MONITOR CTAF FOR A NEARBY ARPT'S TFC. UPON RETURN TO YYY ARPT I WAS ADVISED TO TELEPHONE APCH CTL. I SPOKE TO THE SUPERVISING CTLR WHO STATED THAT ZZZ ARPT WAS 'IN FACT' WITHIN THE TEMP RESTR AIRSPACE. THE SUPVR STATED HE WAS PROVIDING THIS INFORMATION SO I WOULD AVOID THE AREA BY A WIDER BERTH IN THE FUTURE. A CHECK OF THE SECTIONAL CHART REVEALED MY CALCULATION ERROR. I WILL EXERCISE GREATER CARE IN THE FUTURE. NOTE: THE SUPVR STATED HE WOULD NOT BE TAKING ANY FURTHER ACTION AND NOTHING FURTHER WAS REQUIRED FROM ME.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.