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At 0152 on February 23rd the station servi … At 0152 on February 23rd the station service water system at Hope Creek experienced elevated differential pressure due to grass intrusion. At the time of the grass intrusion the `C' Service Water Traveling Screen was removed from service for an inspection. The grass intrusion resulted in the `A' Service Water strainer breaker tripping open de-energizing the strainer. Differential pressure on this strainer was pegged high and flow was reduced to 1900 gallons per minute (17,000 normal; 15,500 minimum). The combination of these conditions resulted in inadequate cooling water flow to the `A' Station Auxiliaries Cooling Water system, and consequently inadequate cooling for the `A' Control Room Emergency Filtration (CREF) unit. With the `B' CREF fan already inoperable for a scheduled maintenance window, this resulted in entry into Technical Specification 3.0.3.</br>This report is to document starting a unit shutdown to comply with Technical Specifications 3.0.3. Power reduction for Unit shutdown was commenced at 0407 (ET). Unit shutdown was terminated at 0424 when `C' Service water pump was returned to service restoring cooling water to `A' SACS loop, restoring it to an OPERABLE status. This event is reportable under 10CFR50.72(b)(2)(i) as a four hour report.</br>The Control Room Ventilation System provides heating, cooling, ventilation, and environmental control for the control room and adjacent areas. Under accident conditions, the Control Room Emergency Filtration Unit (CREF) ensures that the control room will remain habitable during and following all design basis accidents. Because the CREF system is required to automatically respond in the event of a design basis accident, having both trains of CREF inoperable at the same time impacted the ability to mitigate the consequences of an accident. Therefore, this event is also being reported in accordance with 10CFR50.72(b)(3)(v)(D) to comply with the requirements of an 8 hour report.</br>At the time of the event the following Tech Spec related equipment was inoperable. `C' Service Water for screen inspection and `B' CREF for chiller maintenance work. Currently all safety related equipment is operable with the exception of the `A' Service Water Loop.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector.
06:52:00, 23 February 2004 +
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07:32:00, 23 February 2004 +
06:52:00, 23 February 2004 +
At 0152 on February 23rd the station servi … At 0152 on February 23rd the station service water system at Hope Creek experienced elevated differential pressure due to grass intrusion. At the time of the grass intrusion the `C' Service Water Traveling Screen was removed from service for an inspection. The grass intrusion resulted in the `A' Service Water strainer breaker tripping open de-energizing the strainer. Differential pressure on this strainer was pegged high and flow was reduced to 1900 gallons per minute (17,000 normal; 15,500 minimum). The combination of these conditions resulted in inadequate cooling water flow to the `A' Station Auxiliaries Cooling Water system, and consequently inadequate cooling for the `A' Control Room Emergency Filtration (CREF) unit. With the `B' CREF fan already inoperable for a scheduled maintenance window, this resulted in entry into Technical Specification 3.0.3.</br>This report is to document starting a unit shutdown to comply with Technical Specifications 3.0.3. Power reduction for Unit shutdown was commenced at 0407 (ET). Unit shutdown was terminated at 0424 when `C' Service water pump was returned to service restoring cooling water to `A' SACS loop, restoring it to an OPERABLE status. This event is reportable under 10CFR50.72(b)(2)(i) as a four hour report.</br>The Control Room Ventilation System provides heating, cooling, ventilation, and environmental control for the control room and adjacent areas. Under accident conditions, the Control Room Emergency Filtration Unit (CREF) ensures that the control room will remain habitable during and following all design basis accidents. Because the CREF system is required to automatically respond in the event of a design basis accident, having both trains of CREF inoperable at the same time impacted the ability to mitigate the consequences of an accident. Therefore, this event is also being reported in accordance with 10CFR50.72(b)(3)(v)(D) to comply with the requirements of an 8 hour report.</br>At the time of the event the following Tech Spec related equipment was inoperable. `C' Service Water for screen inspection and `B' CREF for chiller maintenance work. Currently all safety related equipment is operable with the exception of the `A' Service Water Loop.</br>The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector.
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00:00:00, 23 February 2004 +
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>.
02:24:07, 2 March 2018 +
07:32:00, 23 February 2004 +
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06:52:00, 23 February 2004 +
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