ML030650912
| ML030650912 | |
| Person / Time | |
|---|---|
| Site: | Quad Cities  |
| Issue date: | 02/28/2003 |
| From: | Tulon T Exelon Generation Co, Exelon Nuclear |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| A-46, GL-87-002, SVP-03-033, TAC M69476, TAC M69477 | |
| Download: ML030650912 (5) | |
Text
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Exelon Generation Company, LLC wwwexeloncorp corn NucleaT Quad Cities Nuclear Power Station 22710 206th Avenue North Cordova, IL 61242-9740 SVP-03-033 February 28, 2003 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Quad Cities Nuclear Power Station Units 1 and 2 Facility Operating License Nos. DPR-29 and DPR-30 NRC Docket Nos. 50-254/50-265
Subject:
Completion of Actions Associated With Supplement No. 1 to Generic Letter 87-02: Verification of Seismic Adequacy of Mechanical and Electrical Equipment in Operating Reactors, Unresolved Safety Issue (USI) A-46 (TAC Nos. M69476 and M69477)
References:
(1)
Letter, Commonwealth Edison Company to USNRC, "Response to Supplement 1 to Generic Letter (GL) 87-02, Verification of Seismic Adequacy of Mechanical and Electrical Equipment in Operating Reactors, SQUG Resolution of USI A-46," dated September 21, 1992.
(2)
Letter, Commonwealth Edison Company to USNRC, "Summary Reports for Resolution of Unresolved Safety Issue A-46, Generic Letter 87-02, Quad Cities Nuclear Power Station Units 1 & 2,"
dated June 28, 1996.
Quad Cities Nuclear Power Station committed, via Reference 1, to use the methodology developed by the Seismic Qualification Utility Group (SQUG), as documented in the Generic Implementation Procedure (GIP) Revision 2 (GIP-2) for the resolution of Unresolved Safety Issue (USI) A-46. A Summary Report for the Resolution of USI A-46 was submitted in Reference 2. Reference 2 identified that all unresolved outliers would be resolved by the end of the second refueling outage, for each respective Unit, after receipt of the NRC's safety evaluation.
February 28, 2003 U. S. Nuclear Regulatory Commission Page 2 of 2 In accordance with Supplement No. 1 to Generic Letter 87-02 and Section 9.5 of the GIP, we are informing the NRC that all of the outliers identified in the Summary Report have been resolved. The attachment to this letter identifies outliers that were resolved differently than previously planned in the Summary Report. These changes were made as a result of additional information that was not available at the time the Summary Report was submitted.
This submittal completes actions in response to Generic Letter 87-02, Supplement No. 1.
Should you have any questions or require additional information, please contact Wally Beck at (309) 227-2800.
Respectfully, Timothy J. Tulon Site Vice President Quad Cities Nuclear Power Station
Attachment:
Outliers Resolved Differently Than Previously Identified in the Summary Report or RAIs cc:
Regional Administrator-NRC Region III NRC Senior Resident Inspector - Quad Cities Nuclear Power Station Outliers Resolved Differently Than Previously Identified in the Summary Report or RAIs ID #
Equipment A-46 Outlier Finding Original Proposed Resolution Final Resolution A03 Nitrogen Bottle Nitrogen bottle is restrained only Gas bottles need a second chain.
Justified acceptability of single N/A (1), N/A (2) by top chain.
tight chain. Station procedure Procedure QOCAP 1500-15 (now SA-AA-1 22) "Handling and Storage of Compressed Gas Cylinders/Portable Tanks and Cryogenic Gas Dewars," was revised to incorporate this requirement.
A05B 480 VAC MCCs Seismic demand exceeds Develop realistic, median-centered Used the MCC seismic test A07 250 VDC MCCs capacity.
response spectra.
contained in Equipment A08 Qualification (EQ) Binder A09 EQ-24D/Q.
A10 A14 A15 A16 Al1 Panel Seismic demand exceeds Develop realistic, median-centered Panel braced to wall.
2201-32 capacity. 1/4" gapped response spectra.
Mod #: EC 24251 anchorage on one side of panel.
A12 Panel Seismic demand exceeds Develop realistic, median-centered Panel braced to wall.
2202-32 capacity.
response spectra.
Mod #: EC 24252 A21 Panel Adjacent gas bottle with single Gas bottles need a second chain.
Justified acceptability of single 2212-32 loose chain is an impact hazard.
tight chain. Station procedure Procedure QCAP 1500-15 (now SA-AA-1 22) "Handling and Storage of Compressed Gas Cylinders/Portable Tanks and Cryogenic Gas Dewars," was revised to incorporate this requirement. - Page 1 of 3; SVP-03-033 dated February 28, 2003
1, Outliers Resolved Differently Than Previously Identified in the Summary Report or RAIs ID #
Equipment A-46 Outlier Finding Original Proposed Resolution Final Resolution A28-1 Switchgear Could not open units to Schedule an internal inspection.
Switchgear (SWGR) was SWGR 13 determine if the units are plug welded at rear to existing SWGR 14 welded at the base.
embedments.
SWGR 13-1 Mod #s:
SWGR 14-1 EC 24253; EC 24254 SWGR 23-1 EC 24279; EC 24121 SWGR 24-1 EC 24256; EC 24280 29-1 Switchgear Could not open units to Schedule an internal inspection.
SWGR was welded at rear to SWGR 23 determine if the units are plug existing embedments.
SWGR 24 welded at the base.
Mod #s: EC 24122; EC 24255 32 2202-70B to 902-Panel is not bolted to adjacent Connect panels together.
Calculation QDC-0900-S-0693 39 panel.
determined adequate clearance based on natural frequencies from existing seismic test.
A35 Panel Adjacent ductwork is 1/4" away Install neoprene or like material Duct angles trimmed, per Work 902-33 (gap) from top of cabinet -
between duct and panel or connect Order (WO) 96117721, for interaction hazard, duct to panel.
clearance.
37 Panel Panel not bolted to adjacent Connect panels together. Install Panels bolted together.
901-33 panel 901-47 and adjacent neoprene or like material between Ductwork angles trimmed to ductwork supported on rod duct and panel.
increase gap.
hangers is 1/4" away (gap)
WO 97000098101 from top of cabinet.
RO-20 GE HEA61 B - in Demand greater than capacity.
Refine amplification factors /
Used switchgear and relay SWGR 13; 13-1; (DEMAND >CAP) evaluate circuit. As required, seismic test lab data to accept.
14; 14-1; SWGR replace relay.
Calculation QDC-6700-S-081 1 23; 23-1; 24; 24-1 I - Page 2 of 3; SVP-03-033 dated February 28, 2003 Outliers Resolved Differently Than Previously Identified in the Summary Report or RAIs ID #
Equipment A-46 Outlier Finding Original Proposed Resolution Final Resolution RO-22a GE HGA1 1 - in DEMAND >CAP; Contact Panel mounting improvement Reduced Amplification Factor 2201-32; 2202-32; configuration not specified.
(Relay Report Aft. G).
(AF), due to panel bracing. Used SWGR 14-1; Refine amplification factors /
switchgear and relay seismic test SWGR 24-1 evaluate circuit. As required, lab data to accept. Mod #: EC replace relay.
24113 Calculation QDC-0200-S-0980 Calculation QDC-6700-S-0811 R0-22b GE HGA11 -
Contact configuration not Evaluate circuit; as required, Resolved via additional 2212-50 specified.
replace relay.
evaluation.
0-5203-127 FO NDIT QC-SW-00-017 RO-25 GE IAC51A - in DEMAND >CAP.
Refine amplification factors /
Used switchgear and relay SWGR 13; 13-1; evaluate circuit. As required, seismic test lab data to accept.
14; 14-1; 23; 23-1; replace relay.
Calculation QDC-6700-S-0811 24; 24-1 RO-26 GE IAC51 B - in DEMAND >CAP.
Refine amplification factors /
Used switchgear and relay SWGR 13-1; evaluate circuit. As required, seismic test lab data to accept.
SWGR 14-1; replace relay.
Calculation QDC-6700-S-0811 SWGR 23-1 SWGR 24-1 R10-28b GE IAV69A - in DEMAND >CAP.
Refine amplification factors /
Used existing switchgear and SWGR 13; SWGR evaluate circuit. As required, relay seismic test lab data to 13-1; SWGR 14; replace relay.
accept.
SWGR 14-1; Calculation QDC-6700-S-081 1 SWGR 23; SWGR 23-1; SWGR 24; SWGR 24-1 RO-31 GE PJC1 1 - in Capacity exceeded.
Refine amplification factors /
Used existing switchgear seismic SWGR 13-1; evaluate circuit. As required, test data, 1.5 x realistic, median SWGR 14-1; replace relay.
centered spectra and contact SWGR 23-1; state to accept. Calculation SWGR 24-1 QDC-6700-S-0827 - Page 3 of 3; SVP-03-033 dated February 28, 2003