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100 +
At approximately 0721, Eastern Standard Ti … At approximately 0721, Eastern Standard Time, the Harris Nuclear Plant (HNP) Control Room was informed that the offsite emergency sirens were inoperable. This event requires an 8-hour non-emergency notification per 10CFR 50.72(b)(3)(xiii) due to the loss of a significant portion of the offsite notification system. The NRC Senior Resident Inspector was informed. The State of North Carolina and all four counties within the 10-mile emergency planning zone were notified and were standing by to implement mobile route alerting if needed, as detailed in the Emergency Plan. Tone Alert Radios for notification of residents within the 5-mile emergency planning zone were also available and operable.</br>The most probable cause was a controller malfunction at the microwave tower. This controller was reset at 0600. A successful system interrogation was initiated and restored operability of all sirens following the controller reset. Operability of the offsite emergency sirens was restored at 0922 following two successful silent tests. The State of North Carolina and all four counties within the 10-mile emergency planning zone were notified of system restoration by 1035. The cause of the controller malfunction and required corrective action will be determined in accordance with HNP's Corrective Action Program.ance with HNP's Corrective Action Program. +
12:21:00, 30 October 2006 +
42,948 +
13:47:00, 30 October 2006 +
12:21:00, 30 October 2006 +
At approximately 0721, Eastern Standard Ti … At approximately 0721, Eastern Standard Time, the Harris Nuclear Plant (HNP) Control Room was informed that the offsite emergency sirens were inoperable. This event requires an 8-hour non-emergency notification per 10CFR 50.72(b)(3)(xiii) due to the loss of a significant portion of the offsite notification system. The NRC Senior Resident Inspector was informed. The State of North Carolina and all four counties within the 10-mile emergency planning zone were notified and were standing by to implement mobile route alerting if needed, as detailed in the Emergency Plan. Tone Alert Radios for notification of residents within the 5-mile emergency planning zone were also available and operable.</br>The most probable cause was a controller malfunction at the microwave tower. This controller was reset at 0600. A successful system interrogation was initiated and restored operability of all sirens following the controller reset. Operability of the offsite emergency sirens was restored at 0922 following two successful silent tests. The State of North Carolina and all four counties within the 10-mile emergency planning zone were notified of system restoration by 1035. The cause of the controller malfunction and required corrective action will be determined in accordance with HNP's Corrective Action Program.ance with HNP's Corrective Action Program. +
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100 +
00:00:00, 30 October 2006 +
Modification date"Modification date" is a predefined property that corresponds to the date of the last modification of a subject and is provided by <a rel="nofollow" class="external text" href="https://www.semantic-mediawiki.org/wiki/Help:Special_properties">Semantic MediaWiki</a>.
22:37:51, 24 September 2017 +
13:47:00, 30 October 2006 +
true +
false +
0.0596 d (1.43 hours, 0.00851 weeks, 0.00196 months) +
12:21:00, 30 October 2006 +
Siren + and Tone Alert Radio +
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