05000254/FIN-2012010-02
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Finding | |
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| Title | Questions Regarding Aging Management Inspections on the 16\\\' Diameter Discharge Pipes |
| Description | As part of the review of licensee Commitment Item 31, the inspectors identified an unresolved item (URI) related to a 16 foot diameter discharge piping. Specifically, the licensee does not physically inspect the piping for aging effects so that the intended functions of this component will be maintained during the period of extended operation. As part of the review of Commitment Item 31 associated with the Water Control Structures inspection program, the inspectors reviewed the components that are within the scope of this program and how effects of aging are managed. NUREG 1796; Safety Evaluation Report Related to the License Renewal of the Dresden Nuclear Power Station, Units 2 and 3 and Quad Cities Nuclear Power Station, Units 1 and 2; dated 2004, Section 3.5.2.3.4 RG 1.127, Inspection of Water-Control Structures Associated with Nuclear Power Plants described the scope of the program and how the effects of aging are managed. Page 3-426 of NUREG 1796 identified the 16 foot diameter discharge piping as an in-scope component. The 16 foot diameter discharge piping provides an Ultimate Heat Sink (UHS) function in that during a Lock and Dam No. 14 failure the discharge piping provides suction source for portable pumps to provide cooling water flow to the Residual Heat Removal Service Water (RHRSW) pumps and Diesel Generator Cooling Water (DGCW) Pumps. The licensee, however, does not physically inspect the discharge piping. The licensee provided aging management of the discharge piping by crediting the performance of a one-time inspection of a 96 inch diameter ice melt line. The ice melt line prevents freezing of the river water entering the plant intake and also performs a support function for the UHS. During this inspection, the licensee was unable to locate where the Office of Nuclear Reactor Regulation (NRR) had reviewed and approved this method of aging management of the discharge piping. In response to this concern, the licensee initiated Condition Report 01434957, (LR) Scoping Review Required for UHS Discharge Piping, dated November 2, 2012. Therefore, this issue is considered unresolved pending additional review of the information provided by the licensee and consultation with NRR to determine the appropriate aging management of the 16 foot diameter discharge piping. |
| Site: | Quad Cities  |
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| Report | IR 05000254/2012010 Section 4OA5 |
| Date counted | Dec 31, 2012 (2012Q4) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | |
| Inspectors (proximate) | A Stone B Jose D Betancourt E Sanchez G O'Dwyer J Bozga J Corujo Sandin J Gilliam N Feliz Adomoc Mathewsd Jones J Bozga J Draper L Haeg M Mitchell R Murray S Bell V Myers B Cushman C Lipa |
| INPO aspect | |
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Finding - Quad Cities - IR 05000254/2012010 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Quad Cities) @ 2012Q4
Self-Identified List (Quad Cities)
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