A COMMERCIAL PLT ENTERS THE NEWLY ESTABLISHED NO FLY ZONE/TEMPORARY FLT RESTR AREA NEAR A NUCLEAR PWR PLANT NW OF ZZZ VOR; US.

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IN LATE JULY THE #3 CYLINDER EXHAUST VALVE BROKE. TODAY; 11/FRI/01; WAS A CLEAR BEAUTIFUL VFR DAY SO I DECIDED TO FLY AN HOUR TO HELP BREAK IN THE NEW CYLINDER. I FLEW FROM MY HOME ARPT AND SINCE I FISH IN THE RIVER NEAR YYY; I DECIDED TO FOLLOW HIGHWAYS TO YYY AND OBSERVE MY FISHING GNDS FROM THE AIR. I RETURNED ALONG THE SAME ROUTE; SOMEWHAT MORE N OF US HWY; BEING VERY CAUTIOUS TO AVOID THE ZZZ CONTROLLED AIRSPACE. I HAD NOT YET FLOWN AN HOUR SO I FLEW TO ZZZ1 FOR A PRACTICE ILS APCH. I MONITORED ADVISORY FREQ THE ENTIRE FLT SINCE THAT IS THE ADVISORY FREQ FOR TWO OTHER ARPTS. I ANNOUNCED MY MANEUVERING WHILE NEAR SECOND ARPT. WHEN I LANDED THE ZZZ2 ARPT MANAGER ASKED ME TO CALL THE ZZZ TWR; WHICH I DID. THEY ASKED ME TO CALL A SUPVR AT CENTER. I DON'T RECALL WHICH OF THESE INFORMED ME THAT A RESTRICTED 10 MILE AIRSPACE HAD BEEN PLACED AROUND A PWR PLANT; AND AS I HAD FOLLOWED ALONG US HWY ROUTE I HAD VIOLATED THAT AIRSPACE. CENTER SAID I WOULD BE CONTACTED IN THE NEXT FEW DAYS. I WAS FOLLOWING A CURRENT SECTIONAL WHICH HAD NO RESTR AIRSPACE. THE RECORDED FSS WX FOR THE ROUTE HAD NO MENTION OF ADDITIONAL RESTR AIRSPACE NEAR THAT ROUTE. BECAUSE THE WX WAS CAVU AND I THOUGHT I WAS ON JUST A LOCAL FLT I DID NOT TALK TO A BRIEFER NOR DID I FILE A FLT PLAN. ALTHOUGH I DON'T USUALLY TALK TO A BRIEFER PRIOR TO A LOCAL WARM-UP FLT; THE ZZZ2 ARPT MANGER SUGGESTED TO ME AFTERWARDS THAT DUE TO 09/TUE/01 EVENTS IT WOULD BE A GOOD IDEA TO ALWAYS TALK TO A BRIEFER PRIOR TO ANY FLT; EVEN IF ONLY IN THE LOCAL PATTERN. I WILL ADOPT THAT POLICY TO AVOID FLYING IN RESTR AIRSPACE. I DID NOT INTENTIONALLY VIOLATE ANY AIRSPACE.