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| | The '''Reactor Water Cleanup ([[has acronym::RWCU]])''' is the filtration system for the reactor vessel. (Its kinda like a pool filter) Its primary safety function is to isolate if needed. Filtering is not needed for safe shutdown but it is good to keep clean water in the vessel to avoid contaminates that may become radioactive or mitigating corrosion on various components. |
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Latest revision as of 10:31, 29 May 2018
The Reactor Water Cleanup (RWCU) is the filtration system for the reactor vessel. (Its kinda like a pool filter) Its primary safety function is to isolate if needed. Filtering is not needed for safe shutdown but it is good to keep clean water in the vessel to avoid contaminates that may become radioactive or mitigating corrosion on various components.
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| | Site | Start date | Title | Description |
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| ENS 57130 | Perry | 16 May 2024 12:40:00 | Reactor Water Cleanup System Isolation Channel Inoperable | The following information was provided by the licensee via email:
On May 16, 2024 at 0840 EDT, operations declared the reactor water cleanup (RWCU) leak detection instruments related to the high differential flow signal inoperable. Technical specification (TS) 3.3.6.1, primary containment and drywell isolation instrumentation, conditions `A and `B were entered as one required channel of instrumentation was inoperable, and an automatic function with isolation capability was not maintained. Therefore, this condition is being reported as an eight-hour, non-emergency notification per 10 CFR 50.72(b)(3)(v)(C) and 10 CFR 50.72(b)(3)(v)(D). All other RWCU primary containment isolation instrumentation functions remained operable.
At 1210 EDT, the affected leak detection instruments were declared operable, and the TS limiting condition for operation 3.3.6.1 was declared met.
There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. | | IR 05000354/2023004 | Hope Creek | 1 February 2024 | Integrated Inspection Report 05000354/2023004 | | | IR 05000220/2023004 | Nine Mile Point | 1 February 2024 | Integrated Inspection Report 05000220/2023004 and 05000410/2023004 | | | ML23361A157 | Clinton | 24 January 2024 | Audit Plan in Support of Review of License Amendment Request Regarding Revision of Technical Specifications Related to Reactor Water Cleanup Isolation | | | GO2-23-135, Notice of Readiness for Supplemental Inspection | Columbia | 14 December 2023 | Notice of Readiness for Supplemental Inspection | | | GO2-23-130, Reply to a Notice of Violation; EA-23-054 | Columbia | 14 December 2023 | Reply to a Notice of Violation; EA-23-054 | | | NRC-23-0079, Transmittal of Revision 1 of the Core Operating Limits Report for Cycle 22 | Fermi | 14 December 2023 | Transmittal of Revision 1 of the Core Operating Limits Report for Cycle 22 | | | U-604788, Fourth Ten-Year Interval Inservice Testing Program Plan Revision 3 | Clinton | 12 December 2023 | Fourth Ten-Year Interval Inservice Testing Program Plan Revision 3 | | | GO2-23-107, Application to Revise Technical Specifications to Adopt TSTS-584, Eliminate Automatic RWCU System Isolation on SLC Initiation | Columbia | 5 December 2023 | Application to Revise Technical Specifications to Adopt TSTS-584, Eliminate Automatic RWCU System Isolation on SLC Initiation | | | ML23334A182 | Pilgrim | 30 November 2023 | Biennial Report for the Defueled Safety Analysis Report Update, Technical Specification Bases Changes, 10 CFR 50.59 Evaluation Summary, and Regulatory Commitment Change Summary November 2021 Through October 2023 | |
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