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At 0808 CDT on 03-29-10, the Plant Shift S … At 0808 CDT on 03-29-10, the Plant Shift Superintendent (PSS) was notified that C-333 Unit 5 Cell 6 Process Gas Detection System (PGLD) was found with the READY light not illuminated when Operations were performing the manual test firing required by TSR surveillance requirement SR 2.4.4.1-1. This PGLD System contains detectors that cover Unit 5 cell 6 cell housing and Section 3 of the cell bypass piping. At the time the READY light was discovered not illuminated, these areas were operating above atmospheric pressure. The PGLD System was declared inoperable, TSR LCO 2.4.4.1.A.1 and 2.4.4.1.C.1 were entered and a continuous smoke watch was put in place within one hour. The power supply module was replaced and the system was satisfactorily tested. The system was declared operable at 1030 CDT on 03-29-10.</br>TSR 2.4.4.1 requires that at least the minimum number of detector heads in the cell housing and in each defined section of the cell bypass are operable during steady state operations above atmospheric pressure. With the Unit 5 Cell 6 PGLD system inoperable, none of the required cell housing heads were operable. A PGLD head was manually actuated ('smoke tested') and the system would not alarm. Engineering has determined that the system would not have been able to perform its intended safety function.</br>This event is reportable as a 24 hour event in accordance with 10CFR76.120(c)(2)(i).</br>The NRC Senior Resident Inspector has been notified of this event.Inspector has been notified of this event. +
13:08:00, 29 March 2010 +
45,800 +
13:36:00, 29 March 2010 +
13:08:00, 29 March 2010 +
At 0808 CDT on 03-29-10, the Plant Shift S … At 0808 CDT on 03-29-10, the Plant Shift Superintendent (PSS) was notified that C-333 Unit 5 Cell 6 Process Gas Detection System (PGLD) was found with the READY light not illuminated when Operations were performing the manual test firing required by TSR surveillance requirement SR 2.4.4.1-1. This PGLD System contains detectors that cover Unit 5 cell 6 cell housing and Section 3 of the cell bypass piping. At the time the READY light was discovered not illuminated, these areas were operating above atmospheric pressure. The PGLD System was declared inoperable, TSR LCO 2.4.4.1.A.1 and 2.4.4.1.C.1 were entered and a continuous smoke watch was put in place within one hour. The power supply module was replaced and the system was satisfactorily tested. The system was declared operable at 1030 CDT on 03-29-10.</br>TSR 2.4.4.1 requires that at least the minimum number of detector heads in the cell housing and in each defined section of the cell bypass are operable during steady state operations above atmospheric pressure. With the Unit 5 Cell 6 PGLD system inoperable, none of the required cell housing heads were operable. A PGLD head was manually actuated ('smoke tested') and the system would not alarm. Engineering has determined that the system would not have been able to perform its intended safety function.</br>This event is reportable as a 24 hour event in accordance with 10CFR76.120(c)(2)(i).</br>The NRC Senior Resident Inspector has been notified of this event.Inspector has been notified of this event. +
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00:00:00, 29 March 2010 +
GDP-1 +
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>.
23:23:56, 24 November 2018 +
13:36:00, 29 March 2010 +
0.0196 d (0.47 hours, 0.0028 weeks, 6.43806e-4 months) +
13:08:00, 29 March 2010 +
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