ML20217M767
| ML20217M767 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 04/24/1998 |
| From: | Dacimo F COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 50-373-96-11, 50-374-96-11, NUDOCS 9805050113 | |
| Download: ML20217M767 (2) | |
Text
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Commonw cahh lihmn Comjun3 l.aSalle Generatmg station 2(d)I North list 1(nad
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April 24,1998 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, D.C. 20555
Subject:
Clarification to System Operational Performance Inspection, (NRC Inspection Report No. 50.373/96011 (DRS); 50-374/96011(DRS))
LaSalle County Station, Units 1 and 2 Facility Operating License NPF-11 and NPF-18 NRC Docket Nos. 50-373 and 50-374
References:
1.
G. E. Grant Letter to W. T. Subalusky, dated
)
November 15,1996, Transmitting NRC Inspection Report 50-373/374-96011 2.
W. T. Subalusky to U. S. NRC letter dated December 20,1996, transmitting LaSalle County's response to NRC Inspection Report 50-373/374-96011 In the Reference 2 letter, LaSalle County stated that the 36-inch pipes and the manual isolation valves to the Service Water Tunnel were being upgraded in safety classification.
During the course of evaluating the upgrade, it was determined that the upgrade had no benefit. The evaluation showed that the 36-inch pipes were located downstream of the non-safety related, non-seismic traveling water screens. The traveling water screens are not supplied from essential busses, which would result in their loss of function during a loss of offsite power. Therefore, no credit is taken for the 36-inch pipes for supplying safety related service water following a loss of offsite power event.
Additionally, the upgrade of the 54-inch CSCS Bypass line and associated valve to safety related status is adequate to ensure a safety-related supply of cooling water to the plant. Based on this, upgrading the commercial grade components currently installed on the 36-inch inlet lines to the Service g'D Water Tunnel is not technically justified and LaSalle will not upgrade the safety classification of the 36-inch inlet lines.
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9905050113 900424
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O LaSalle Station is on schedule to complete the upgrade of the 54-inch CSCS
'bypas's line to safety-related status prior to Unit 1 restart.
If there are any questions or comments concerning this letter, please refer them to Harry Pontious, Regulatory Assurance Manager, at (815) 357-6761, extension 2383.
Resp tfully,
)/
LJ Fred Dacimo Site Vice President LaSalle County Station cc:
A. B. Beach, NRC Region ill Administrator M. P. Huber, NRC Senior Resident inspector - LaSalle D. M. Skay, Project Manager - NRR - LaSalle F. Niziolek, Office of Nuclear Facility Safety - IDNS
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